Comparison of the geochronological frameworks and preliminary study on key geological events during the Neoproterozoic Late Tonian period in the Hunan-Guizhou-Guangxi area

doi:10.13745/j.esf.sf.2019.12.5

Abstract

Abstract:

The Neoproterozoic Late Tonian stratum (the Xiajiang Group and its time-equivalent stratum) is well exposed in the Hunan-Guizhou-Guangxi area. It is an important research subject for studying the evolution of the rift basin in South China after the collision between the Yangtze Craton and the Cathaysia Block. Here, we report the zircon U-Pb ages of the tuffs and tuffite in the upper part of the Qingshuijiang Formation and the bottom and middle parts of the Pinglue Formation in the Wanshan area, Tongren City, Guizhou Province to be 763.8±5.5 Ma (N=24, MSWD=0.29), 760.2±4.1 Ma (N=25, MSWD=0.39), and 759.1±3.9 Ma (N=26, MSWD=0.38), respectively. By compiling the area's volcanic, volcanic-sedimentary and tuffeous rock ages, we further determined the deposition periods of the Xiajiang Group and its equivalence to be around 822-715 Ma. We propose that the basalt within the Sanmenjie Formation of the Danzhou Group in northern Guangxi formed in an extensional setting after the Wuling movement, as a result of maximum extension of the Hunan-Guizhou-Guangxi rift basin. A large amount of volcanic materials in the Qingshuijiang and Pinglue Formations are mainly sourced from the intermediate-acidic extrusive rocks (800-760 Ma) in the eastern section of the Jiangnan Orogen. Combined with regional stratigraphy, lithology and geochronology, we restore the Neoproterozoic Late Tonian evolutionary history of the Hunan-Guizhou-Guangxi basin and propose to establish the Xiajiang System.

Key words: Banxi Group, Xiajiang Group, Gaojian Group, Danzhou Group, Tonian, Precambrian, Yangzte Craton, Jiangnan Orogen

CLC Number:

ZHANG Jiawei, CHEN Jianshu, WU Tao, YE Taiping, CHEN Minghua, DAI Yaran, DENG Xiaojie, MU Jun. Comparison of the geochronological frameworks and preliminary study on key geological events during the Neoproterozoic Late Tonian period in the Hunan-Guizhou-Guangxi area[J]. Earth Science Frontiers, 2020, 27(4): 1-16.

Figures/Tables 8

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样品编号	w_B/10^-6						Th/U		w(Y)/10^-6		同位素比值及误差																	同位素年龄及误差/Ma
样品编号	U				Th		Th/U		w(Y)/10^-6		²⁰⁷Pb/²⁰⁶Pb			1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U			1σ		²⁰⁷Pb/²⁰⁶Pb				1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U	1σ
20BXC41-01	156.26				240.66		1.54				0.064 05			0.001 31			1.107 92			0.024 41			0.125 18			0.001 82		743				43			757			12			760	10
20BXC41-02	106.75				140.17		1.31				0.065 61			0.002 47			1.144 01			0.054 72			0.125 90			0.003 61		794				79			774			26			764	21
20BXC41-03	169.23				179.42		1.06				0.063 55			0.002 08			1.114 82			0.043 34			0.126 61			0.002 84		727				69			760			21			769	16
20BXC41-04	169.31				277.99		1.64				0.065 86			0.001 66			1.133 23			0.029 32			0.125 61			0.003 10		802				53			769			14			763	18
20BXC41-06	172.48				316.86		1.84				0.063 47			0.001 53			1.084 64			0.024 68			0.124 16			0.001 92		724				51			746			12			754	11
20BXC41-07	63.36				65.35		1.03				0.065 58			0.002 61			1.216 61			0.050 66			0.134 43			0.002 25		793				83			808			23			813	13
20BXC41-08	98.49				99.62		1.01				0.065 37			0.003 24			1.115 53			0.055 19			0.123 92			0.002 33		786				104			761			26			753	13
20BXC41-09	110.53				113.72		1.03				0.063 98			0.001 28			1.103 70			0.023 46			0.124 83			0.001 60		741				42			755			11			758	9
20BXC41-10	125.48				153.93		1.23				0.064 53			0.002 54			1.097 09			0.047 34			0.123 10			0.002 25		759				83			752			23			748	13
20BXC41-11	60.20				78.31		1.30				0.063 48			0.002 36			1.081 53			0.040 58			0.123 83			0.002 07		724				79			744			20			753	12
20BXC41-12	133.90				149.09		1.11				0.063 12			0.001 92			1.104 99			0.039 22			0.126 85			0.002 72		712				65			756			19			770	16
20BXC41-13	154.95				200.61		1.29				0.063 83			0.001 52			1.084 74			0.026 47			0.122 90			0.001 57		736				50			746			13			747	9
20BXC41-05	143.38				246.82		1.72				0.065 88			0.002 28			1.145 05			0.037 59			0.126 45			0.002 48		803				72			775			18			768	14
20BXC41-17	122.71				129.04		1.05				0.064 16			0.001 50			1.100 54			0.028 05			0.123 82			0.001 63		747				49			754			14			752	9
20BXC41-14	104.36				146.82		1.41				0.062 77			0.001 60			1.078 92			0.026 45			0.124 54			0.001 72		701				54			743			13			757	10
20BXC41-15	225.42				414.13		1.84				0.064 58			0.002 43			1.117 13			0.039 43			0.126 00			0.002 62		761				79			762			19			765	15
20BXC41-16	171.93				271.53		1.58				0.063 24			0.002 79			1.097 30			0.051 50			0.125 69			0.003 22		716				94			752			25			763	18
WSPL-01	737.46				59.35		0.08		1 811.78		0.068 28			0.001 24			1.416 90			0.024 55			0.150 89			0.002 05		876				38			896			10			906	11
WSPL-02	95.44				142.90		1.50		2 090.21		0.069 58			0.003 38			1.217 13			0.045 78			0.127 36			0.001 50		917				100			808			21			773	9
WSPL-03	432.14				193.12		0.45		2 905.59		0.069 88			0.001 86			1.373 75			0.028 12			0.142 17			0.001 41		924				56			878			12			857	8
WSPL-04	153.18				147.55		0.96		1 776.66		0.068 35			0.002 65			1.171 70			0.036 44			0.124 54			0.001 44		880				84			787			17			757	8
WSPL-05	522.08				170.13		0.33		2 235.74		0.094 87			0.002 09			2.911 55			0.069 12			0.212 29			0.004 30		1 526				42			1 385			18			1 241	23
WSPL-06	338.72				112.17		0.33		3 069.25		0.069 99			0.001 69			1.383 60			0.028 86			0.143 29			0.001 88		928				49			882			12			863	11
WSPL-07	262.15				192.29		0.73		1 835.50		0.107 98			0.001 75			4.565 70			0.069 17			0.305 68			0.002 68		1 766				30			1 743			13			1 719	13
WSPL-08	250.24				168.76		0.67		789.25		0.073 45			0.002 51			1.479 33			0.045 28			0.146 21			0.001 51		1 028				64			922			19			880	8
WSPL-09	124.62				172.59		1.38		1 673.60		0.062 12			0.003 00			1.075 76			0.040 66			0.125 36			0.001 67		680				108			742			20			761	10
WSPL-10	495.62				112.81		0.23		3 192.14		0.072 20			0.002 30			1.336 34			0.029 18			0.132 76			0.001 29		991				65			862			13			804	7
WSPL-11	413.26				257.26		0.62		1 122.15		0.069 78			0.001 67			1.337 29			0.025 84			0.138 89			0.001 50		922				50			862			11			838	9
WSPL-12	382.21				77.93		0.20		3 100.52		0.068 11			0.001 90			1.313 17			0.029 85			0.140 26			0.001 84		872				57			852			13			846	10
WSPL-13	400.91				80.76		0.20		2 669.99		0.068 71			0.001 74			1.341 05			0.027 88			0.141 24			0.001 63		900				52			864			12			852	9
WSPL-14	174.52				135.06		0.77		753.67		0.065 58			0.001 92			1.130 35			0.031 36			0.124 36			0.001 51		794				61			768			15			756	9
WSPL-15	429.25				99.95		0.23		3 337.34		0.068 41			0.001 34			1.431 63			0.026 93			0.153 67			0.003 46		881				41			902			11			921	19
WSPL-16	1 277.90				145.50		0.11		2 383.70		0.064 53			0.002 73			1.345 12			0.025 53			0.150 41			0.001 67		759				61			865			11			903	9
WSPL-17	149.99				80.60		0.54		1 692.03		0.065 30			0.004 24			1.126 76			0.047 72			0.124 45			0.001 38		783				136			766			23			756	8
样品编号		w_B/10^-6						Th/U		w(Y)/10^-6			同位素比值及误差																同位素年龄及误差/Ma
样品编号		U			Th			Th/U		w(Y)/10^-6			²⁰⁷Pb/²⁰⁶Pb		1σ	²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U			1σ				²⁰⁷Pb/²⁰⁶Pb		1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U		1σ
WSPL-18		200.13			77.56			0.39		2 022.05			0.063 24		0.003 65	1.108 92			0.032 95			0.125 72			0.001 49				717		123			758			16			763		9
WSPL-19		236.06			117.94			0.50		2 208.66			0.066 01		0.002 84	1.320 51			0.033 07			0.146 90			0.001 54				806		86			855			14			884		9
WSPL-20		511.72			102.11			0.20		3 340.79			0.066 10		0.002 70	1.130 15			0.024 55			0.124 24			0.001 53				809		86			768			12			755		9
WSPL-21		133.83			215.75			1.61		2 557.55			0.176 37		0.007 50	3.524 49			0.210 88			0.139 06			0.002 39				2 620		71			1 533			47			839		14
WSPL-22		283.30			98.23			0.35		2 741.66			0.063 12		0.003 68	1.106 42			0.027 53			0.124 80			0.001 54				722		124			756			13			758		9
WSPL-23		235.08			85.51			0.36		1 629.57			0.064 09		0.003 42	1.146 34			0.030 06			0.125 67			0.001 57				746		113			776			14			763		9
WSPL-24		1 618.83			793.36			0.49		4 155.40			0.069 24		0.001 11	1.322 35			0.021 15			0.139 12			0.001 46				906		33			856			9			840		8
WSPL-25		154.83			271.23			1.75		2 863.58			0.073 31		0.002 70	1.268 71			0.031 18			0.125 95			0.001 27				1 033		75			832			14			765		7
20BXC18-01		99.01			183.66			1.85					0.095 30		0.003 24	1.722 81			0.061 19			0.131 11			0.002 35				1 534		64			1 017			23			794		13
20BXC18-02		95.73			180.06			1.88					0.065 47		0.002 63	1.115 97			0.041 62			0.124 20			0.002 17				790		84			761			20			755		12
20BXC18-03		56.24			70.53			1.25					0.063 51		0.002 39	1.101 56			0.051 14			0.124 82			0.002 53				725		80			754			25			758		14
20BXC18-04		187.59			287.58			1.53					0.066 19		0.002 26	1.139 86			0.039 13			0.125 42			0.002 58				812		71			772			19			762		15
20BXC18-05		112.43			183.43			1.63					0.068 66		0.002 43	1.177 57			0.046 51			0.124 39			0.002 79				888		73			790			22			756		16
20BXC18-06		140.38			125.79			0.90					0.065 83		0.001 38	1.174 72			0.023 20			0.129 89			0.001 68				801		44			789			11			787		10
20BXC18-07		149.62			287.19			1.92					0.065 72		0.002 06	1.124 61			0.033 61			0.124 33			0.002 05				798		66			765			16			755		12
20BXC18-08		161.07			211.48			1.31					0.066 59		0.001 61	1.167 35			0.033 22			0.126 65			0.001 73				825		50			785			16			769		10
20BXC18-09		55.55			62.24			1.12					0.065 01		0.002 01	1.162 19			0.034 62			0.129 66			0.001 98				775		65			783			16			786		11
20BXC18-10		127.70			126.71			0.99					0.064 22		0.001 68	1.116 96			0.034 85			0.125 39			0.001 86				749		55			762			17			762		11
20BXC18-11		79.93			181.20			2.27					0.065 28		0.002 06	1.118 54			0.035 59			0.124 84			0.001 92				783		66			762			17			758		11
20BXC18-12		118.90			229.44			1.93					0.063 49		0.001 79	1.090 20			0.031 01			0.124 31			0.001 65				725		60			749			15			755		9
20BXC18-13		72.59			103.64			1.43					0.066 94		0.001 42	1.144 41			0.022 88			0.124 27			0.001 60				836		44			775			11			755		9
20BXC18-14		85.13			105.64			1.24					0.066 79		0.002 84	1.144 47			0.050 58			0.124 39			0.002 32				831		89			775			24			756		13
20BXC18-15		186.20			372.37			2.00					0.065 25		0.001 38	1.121 29			0.022 12			0.124 72			0.001 54				782		45			764			11			758		9
20BXC18-16		100.38			86.77			0.86					0.067 07		0.002 19	1.221 60			0.041 54			0.132 10			0.002 38				840		68			811			19			800		14
20BXC18-17		48.84			93.72			1.92					0.067 22		0.002 27	1.205 98			0.043 83			0.129 86			0.002 12				845		70			803			20			787		12
20BXC18-18		81.23			109.12			1.34					0.064 63		0.002 52	1.116 63			0.041 70			0.126 06			0.002 53				762		82			761			20			765		14
20BXC18-19		81.27			232.60			2.86					0.066 83		0.002 30	1.221 70			0.049 27			0.131 53			0.002 71				833		72			811			23			797		15
20BXC18-20		65.53			137.26			2.09					0.061 02		0.002 67	1.042 30			0.044 94			0.123 90			0.002 22				640		94			725			22			753		13
20BXC18-21		221.77			439.73			1.98					0.063 55		0.001 56	1.117 39			0.029 35			0.127 05			0.002 31				727		52			762			14			771		13
20BXC18-22		143.37			321.18			2.24					0.063 91		0.002 36	1.087 74			0.035 44			0.123 86			0.002 49				739		78			747			17			753		14
20BXC18-23		116.13			201.88			1.74					0.066 32		0.001 78	1.203 31			0.029 47			0.131 55			0.002 11				817		56			802			14			797		12
20BXC18-24		185.19			202.35			1.09					0.064 94		0.001 33	1.112 91			0.025 45			0.124 15			0.001 42				772		43			760			12			754		8
20BXC18-25		181.68			146.72			0.81					0.065 03		0.000 98	1.125 57			0.019 08			0.125 51			0.001 30				775		32			766			9			762		7
20BXC18-26		150.29			117.24			0.78					0.065 67		0.001 23	1.143 36			0.022 19			0.126 51			0.001 33				796		39			774			11			768		8
20BXC18-27		89.83			111.01			1.24					0.065 33		0.002 18	1.128 66			0.039 72			0.125 62			0.001 83				785		70			767			19			763		11
20BXC18-28		111.39			183.13			1.64					0.071 53		0.001 64	1.223 36			0.029 30			0.124 16			0.001 76				973		47			811			13			754		10
20BXC18-29		113.22			176.97			1.56					0.066 61		0.002 16	1.209 31			0.036 72			0.131 08			0.002 66				826		68			805			17			794		15
样品编号			w_B/10^-6			Th/U			w(Y)/10^-6			同位素比值及误差															同位素年龄及误差/Ma
样品编号			U	Th		Th/U			w(Y)/10^-6			²⁰⁷Pb/²⁰⁶Pb			1σ		²⁰⁷Pb/²³⁵U	1σ			²⁰⁶Pb/²³⁸U			1σ			²⁰⁷Pb/²⁰⁶Pb			1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U			1σ
20BXC18-30			73.66	148.64		2.02						0.062 81			0.002 07		1.084 01	0.033 18			0.125 50			0.001 59			702			70			746			16			762			9
20BXC18-31			145.70	180.40		1.24						0.065 91			0.001 68		1.162 44	0.028 15			0.128 08			0.001 69			804			54			783			13			777			10
20BXC18-32			92.17	99.59		1.08						0.064 74			0.001 96		1.157 78	0.034 34			0.129 51			0.001 70			766			64			781			16			785			10
20BXC18-33			96.64	119.80		1.24						0.067 01			0.002 22		1.157 67	0.037 98			0.125 85			0.002 43			838			69			781			18			764			14
20BXC18-34			79.37	175.88		2.22						0.067 58			0.001 95		1.149 47	0.031 35			0.123 52			0.001 67			856			60			777			15			751			10
20BXC13-01			79.92	107.19		1.34						0.066 51			0.002 51		1.148 86	0.042 45			0.125 81			0.002 06			823			79			777			20			764			12
20BXC13-02			67.39	196.06		2.91						0.064 01			0.002 01		1.158 69	0.038 85			0.131 61			0.002 04			742			67			781			18			797			12
20BXC13-03			79.12	94.30		1.19						0.063 63			0.002 15		1.100 93	0.036 94			0.125 73			0.002 47			729			72			754			18			763			14
20BXC13-04			67.54	110.81		1.64						0.062 85			0.003 79		1.069 15	0.066 29			0.123 40			0.002 89			703			128			738			33			750			17
20BXC13-05			52.75	113.51		2.15						0.064 00			0.002 47		1.100 08	0.047 47			0.125 32			0.002 53			741			82			753			23			761			14
20BXC13-06			112.11	83.45		0.74						0.064 03			0.001 71		1.114 37	0.032 21			0.126 06			0.002 10			743			56			760			15			765			12
20BXC13-07			87.09	76.06		0.87						0.064 68			0.002 54		1.110 36	0.042 15			0.125 22			0.002 77			764			83			758			20			761			16
20BXC13-08			108.35	98.96		0.91						0.066 70			0.002 27		1.154 22	0.037 30			0.124 99			0.002 98			828			71			779			18			759			17
20BXC13-09			40.41	52.74		1.30						0.061 95			0.003 74		1.086 13	0.083 12			0.124 26			0.003 54			673			129			747			40			755			20
20BXC13-10			49.48	47.47		0.96						0.063 38			0.002 88		1.110 76	0.053 94			0.126 30			0.002 32			721			97			759			26			767			13
20BXC13-11			83.34	113.02		1.36						0.064 32			0.002 90		1.105 87	0.030 08			0.127 20			0.003 91			752			95			756			15			772			22
20BXC13-12			79.43	140.52		1.77						0.065 11			0.002 16		1.110 88	0.041 00			0.123 48			0.002 37			778			70			759			20			751			14
20BXC13-13			171.43	233.10		1.36						0.065 10			0.001 94		1.135 03	0.032 30			0.126 67			0.002 68			778			63			770			15			769			15
20BXC13-14			70.03	115.22		1.65						0.065 18			0.002 15		1.138 78	0.038 70			0.127 16			0.002 48			780			69			772			18			772			14
20BXC13-15			25.66	26.33		1.03						0.065 88			0.005 18		1.079 63	0.075 58			0.123 11			0.003 64			803			165			743			37			748			21
20BXC13-16			46.62	67.34		1.44						0.064 52			0.002 67		1.164 28	0.048 62			0.132 13			0.002 66			759			87			784			23			800			15
20BXC13-17			58.37	79.27		1.36						0.066 05			0.002 20		1.146 37	0.043 76			0.125 66			0.002 49			808			70			776			21			763			14
20BXC13-18			105.85	141.78		1.34						0.065 74			0.002 08		1.153 15	0.036 27			0.127 54			0.001 99			798			66			779			17			774			11
20BXC13-19			82.86	95.38		1.15						0.065 25			0.002 29		1.125 45	0.041 53			0.125 29			0.001 83			783			74			766			20			761			10
20BXC13-20			182.95	312.20		1.71						0.066 90			0.002 15		1.178 83	0.045 06			0.127 39			0.002 66			835			67			791			21			773			15
20BXC13-21			56.00	58.79		1.05						0.064 65			0.003 11		1.158 40	0.056 74			0.130 58			0.002 30			763			101			781			27			791			13
20BXC13-22			83.39	124.51		1.49						0.066 16			0.001 99		1.247 57	0.040 27			0.136 76			0.002 21			811			63			822			18			826			13
20BXC13-23			87.81	106.35		1.21						0.066 50			0.001 81		1.271 39	0.037 32			0.139 01			0.002 13			822			57			833			17			839			12
20BXC13-24			40.35	76.09		1.89						0.066 26			0.003 08		1.133 69	0.050 70			0.125 62			0.002 47			815			97			770			24			763			14
20BXC13-25			68.76	59.07		0.86						0.068 00			0.002 95		1.171 58	0.049 14			0.126 50			0.002 58			868			90			787			23			768			15
20BXC13-26			43.38	67.22		1.55						0.065 38			0.002 41		1.173 20	0.044 47			0.130 92			0.002 38			787			78			788			21			793			14
20BXC13-27			167.02	204.51		1.22						0.065 84			0.001 10		1.242 12	0.023 99			0.136 90			0.001 65			801			35			820			11			827			9
20BXC13-28			66.28	137.85		2.08						0.064 33			0.002 30		1.098 47	0.041 03			0.124 78			0.002 05			752			75			753			20			758			12
20BXC13-29			28.73	30.31		1.05						0.065 21			0.003 36		1.148 36	0.062 05			0.127 71			0.002 33			781			108			776			29			775			13
20BXC13-30			248.92	437.35		1.76						0.066 87			0.000 85		1.248 25	0.019 95			0.135 17			0.001 51			834			26			823			9			817			9
20BXC13-32			60.14	48.26		0.80						0.067 47			0.002 93		1.148 12	0.053 16			0.123 51			0.002 36			852			90			776			25			751			14
20BXC13-31			82.77	96.81		1.17						0.064 41			0.001 60		1.130 48	0.032 08			0.126 86			0.001 65			755			52			768			15			770			9

样品编号	w_B/10^-6						Th/U		w(Y)/10^-6		同位素比值及误差																	同位素年龄及误差/Ma
样品编号	U				Th		Th/U		w(Y)/10^-6		²⁰⁷Pb/²⁰⁶Pb			1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U			1σ		²⁰⁷Pb/²⁰⁶Pb				1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U	1σ
20BXC41-01	156.26				240.66		1.54				0.064 05			0.001 31			1.107 92			0.024 41			0.125 18			0.001 82		743				43			757			12			760	10
20BXC41-02	106.75				140.17		1.31				0.065 61			0.002 47			1.144 01			0.054 72			0.125 90			0.003 61		794				79			774			26			764	21
20BXC41-03	169.23				179.42		1.06				0.063 55			0.002 08			1.114 82			0.043 34			0.126 61			0.002 84		727				69			760			21			769	16
20BXC41-04	169.31				277.99		1.64				0.065 86			0.001 66			1.133 23			0.029 32			0.125 61			0.003 10		802				53			769			14			763	18
20BXC41-06	172.48				316.86		1.84				0.063 47			0.001 53			1.084 64			0.024 68			0.124 16			0.001 92		724				51			746			12			754	11
20BXC41-07	63.36				65.35		1.03				0.065 58			0.002 61			1.216 61			0.050 66			0.134 43			0.002 25		793				83			808			23			813	13
20BXC41-08	98.49				99.62		1.01				0.065 37			0.003 24			1.115 53			0.055 19			0.123 92			0.002 33		786				104			761			26			753	13
20BXC41-09	110.53				113.72		1.03				0.063 98			0.001 28			1.103 70			0.023 46			0.124 83			0.001 60		741				42			755			11			758	9
20BXC41-10	125.48				153.93		1.23				0.064 53			0.002 54			1.097 09			0.047 34			0.123 10			0.002 25		759				83			752			23			748	13
20BXC41-11	60.20				78.31		1.30				0.063 48			0.002 36			1.081 53			0.040 58			0.123 83			0.002 07		724				79			744			20			753	12
20BXC41-12	133.90				149.09		1.11				0.063 12			0.001 92			1.104 99			0.039 22			0.126 85			0.002 72		712				65			756			19			770	16
20BXC41-13	154.95				200.61		1.29				0.063 83			0.001 52			1.084 74			0.026 47			0.122 90			0.001 57		736				50			746			13			747	9
20BXC41-05	143.38				246.82		1.72				0.065 88			0.002 28			1.145 05			0.037 59			0.126 45			0.002 48		803				72			775			18			768	14
20BXC41-17	122.71				129.04		1.05				0.064 16			0.001 50			1.100 54			0.028 05			0.123 82			0.001 63		747				49			754			14			752	9
20BXC41-14	104.36				146.82		1.41				0.062 77			0.001 60			1.078 92			0.026 45			0.124 54			0.001 72		701				54			743			13			757	10
20BXC41-15	225.42				414.13		1.84				0.064 58			0.002 43			1.117 13			0.039 43			0.126 00			0.002 62		761				79			762			19			765	15
20BXC41-16	171.93				271.53		1.58				0.063 24			0.002 79			1.097 30			0.051 50			0.125 69			0.003 22		716				94			752			25			763	18
WSPL-01	737.46				59.35		0.08		1 811.78		0.068 28			0.001 24			1.416 90			0.024 55			0.150 89			0.002 05		876				38			896			10			906	11
WSPL-02	95.44				142.90		1.50		2 090.21		0.069 58			0.003 38			1.217 13			0.045 78			0.127 36			0.001 50		917				100			808			21			773	9
WSPL-03	432.14				193.12		0.45		2 905.59		0.069 88			0.001 86			1.373 75			0.028 12			0.142 17			0.001 41		924				56			878			12			857	8
WSPL-04	153.18				147.55		0.96		1 776.66		0.068 35			0.002 65			1.171 70			0.036 44			0.124 54			0.001 44		880				84			787			17			757	8
WSPL-05	522.08				170.13		0.33		2 235.74		0.094 87			0.002 09			2.911 55			0.069 12			0.212 29			0.004 30		1 526				42			1 385			18			1 241	23
WSPL-06	338.72				112.17		0.33		3 069.25		0.069 99			0.001 69			1.383 60			0.028 86			0.143 29			0.001 88		928				49			882			12			863	11
WSPL-07	262.15				192.29		0.73		1 835.50		0.107 98			0.001 75			4.565 70			0.069 17			0.305 68			0.002 68		1 766				30			1 743			13			1 719	13
WSPL-08	250.24				168.76		0.67		789.25		0.073 45			0.002 51			1.479 33			0.045 28			0.146 21			0.001 51		1 028				64			922			19			880	8
WSPL-09	124.62				172.59		1.38		1 673.60		0.062 12			0.003 00			1.075 76			0.040 66			0.125 36			0.001 67		680				108			742			20			761	10
WSPL-10	495.62				112.81		0.23		3 192.14		0.072 20			0.002 30			1.336 34			0.029 18			0.132 76			0.001 29		991				65			862			13			804	7
WSPL-11	413.26				257.26		0.62		1 122.15		0.069 78			0.001 67			1.337 29			0.025 84			0.138 89			0.001 50		922				50			862			11			838	9
WSPL-12	382.21				77.93		0.20		3 100.52		0.068 11			0.001 90			1.313 17			0.029 85			0.140 26			0.001 84		872				57			852			13			846	10
WSPL-13	400.91				80.76		0.20		2 669.99		0.068 71			0.001 74			1.341 05			0.027 88			0.141 24			0.001 63		900				52			864			12			852	9
WSPL-14	174.52				135.06		0.77		753.67		0.065 58			0.001 92			1.130 35			0.031 36			0.124 36			0.001 51		794				61			768			15			756	9
WSPL-15	429.25				99.95		0.23		3 337.34		0.068 41			0.001 34			1.431 63			0.026 93			0.153 67			0.003 46		881				41			902			11			921	19
WSPL-16	1 277.90				145.50		0.11		2 383.70		0.064 53			0.002 73			1.345 12			0.025 53			0.150 41			0.001 67		759				61			865			11			903	9
WSPL-17	149.99				80.60		0.54		1 692.03		0.065 30			0.004 24			1.126 76			0.047 72			0.124 45			0.001 38		783				136			766			23			756	8
样品编号		w_B/10^-6						Th/U		w(Y)/10^-6			同位素比值及误差																同位素年龄及误差/Ma
样品编号		U			Th			Th/U		w(Y)/10^-6			²⁰⁷Pb/²⁰⁶Pb		1σ	²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U			1σ				²⁰⁷Pb/²⁰⁶Pb		1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U		1σ
WSPL-18		200.13			77.56			0.39		2 022.05			0.063 24		0.003 65	1.108 92			0.032 95			0.125 72			0.001 49				717		123			758			16			763		9
WSPL-19		236.06			117.94			0.50		2 208.66			0.066 01		0.002 84	1.320 51			0.033 07			0.146 90			0.001 54				806		86			855			14			884		9
WSPL-20		511.72			102.11			0.20		3 340.79			0.066 10		0.002 70	1.130 15			0.024 55			0.124 24			0.001 53				809		86			768			12			755		9
WSPL-21		133.83			215.75			1.61		2 557.55			0.176 37		0.007 50	3.524 49			0.210 88			0.139 06			0.002 39				2 620		71			1 533			47			839		14
WSPL-22		283.30			98.23			0.35		2 741.66			0.063 12		0.003 68	1.106 42			0.027 53			0.124 80			0.001 54				722		124			756			13			758		9
WSPL-23		235.08			85.51			0.36		1 629.57			0.064 09		0.003 42	1.146 34			0.030 06			0.125 67			0.001 57				746		113			776			14			763		9
WSPL-24		1 618.83			793.36			0.49		4 155.40			0.069 24		0.001 11	1.322 35			0.021 15			0.139 12			0.001 46				906		33			856			9			840		8
WSPL-25		154.83			271.23			1.75		2 863.58			0.073 31		0.002 70	1.268 71			0.031 18			0.125 95			0.001 27				1 033		75			832			14			765		7
20BXC18-01		99.01			183.66			1.85					0.095 30		0.003 24	1.722 81			0.061 19			0.131 11			0.002 35				1 534		64			1 017			23			794		13
20BXC18-02		95.73			180.06			1.88					0.065 47		0.002 63	1.115 97			0.041 62			0.124 20			0.002 17				790		84			761			20			755		12
20BXC18-03		56.24			70.53			1.25					0.063 51		0.002 39	1.101 56			0.051 14			0.124 82			0.002 53				725		80			754			25			758		14
20BXC18-04		187.59			287.58			1.53					0.066 19		0.002 26	1.139 86			0.039 13			0.125 42			0.002 58				812		71			772			19			762		15
20BXC18-05		112.43			183.43			1.63					0.068 66		0.002 43	1.177 57			0.046 51			0.124 39			0.002 79				888		73			790			22			756		16
20BXC18-06		140.38			125.79			0.90					0.065 83		0.001 38	1.174 72			0.023 20			0.129 89			0.001 68				801		44			789			11			787		10
20BXC18-07		149.62			287.19			1.92					0.065 72		0.002 06	1.124 61			0.033 61			0.124 33			0.002 05				798		66			765			16			755		12
20BXC18-08		161.07			211.48			1.31					0.066 59		0.001 61	1.167 35			0.033 22			0.126 65			0.001 73				825		50			785			16			769		10
20BXC18-09		55.55			62.24			1.12					0.065 01		0.002 01	1.162 19			0.034 62			0.129 66			0.001 98				775		65			783			16			786		11
20BXC18-10		127.70			126.71			0.99					0.064 22		0.001 68	1.116 96			0.034 85			0.125 39			0.001 86				749		55			762			17			762		11
20BXC18-11		79.93			181.20			2.27					0.065 28		0.002 06	1.118 54			0.035 59			0.124 84			0.001 92				783		66			762			17			758		11
20BXC18-12		118.90			229.44			1.93					0.063 49		0.001 79	1.090 20			0.031 01			0.124 31			0.001 65				725		60			749			15			755		9
20BXC18-13		72.59			103.64			1.43					0.066 94		0.001 42	1.144 41			0.022 88			0.124 27			0.001 60				836		44			775			11			755		9
20BXC18-14		85.13			105.64			1.24					0.066 79		0.002 84	1.144 47			0.050 58			0.124 39			0.002 32				831		89			775			24			756		13
20BXC18-15		186.20			372.37			2.00					0.065 25		0.001 38	1.121 29			0.022 12			0.124 72			0.001 54				782		45			764			11			758		9
20BXC18-16		100.38			86.77			0.86					0.067 07		0.002 19	1.221 60			0.041 54			0.132 10			0.002 38				840		68			811			19			800		14
20BXC18-17		48.84			93.72			1.92					0.067 22		0.002 27	1.205 98			0.043 83			0.129 86			0.002 12				845		70			803			20			787		12
20BXC18-18		81.23			109.12			1.34					0.064 63		0.002 52	1.116 63			0.041 70			0.126 06			0.002 53				762		82			761			20			765		14
20BXC18-19		81.27			232.60			2.86					0.066 83		0.002 30	1.221 70			0.049 27			0.131 53			0.002 71				833		72			811			23			797		15
20BXC18-20		65.53			137.26			2.09					0.061 02		0.002 67	1.042 30			0.044 94			0.123 90			0.002 22				640		94			725			22			753		13
20BXC18-21		221.77			439.73			1.98					0.063 55		0.001 56	1.117 39			0.029 35			0.127 05			0.002 31				727		52			762			14			771		13
20BXC18-22		143.37			321.18			2.24					0.063 91		0.002 36	1.087 74			0.035 44			0.123 86			0.002 49				739		78			747			17			753		14
20BXC18-23		116.13			201.88			1.74					0.066 32		0.001 78	1.203 31			0.029 47			0.131 55			0.002 11				817		56			802			14			797		12
20BXC18-24		185.19			202.35			1.09					0.064 94		0.001 33	1.112 91			0.025 45			0.124 15			0.001 42				772		43			760			12			754		8
20BXC18-25		181.68			146.72			0.81					0.065 03		0.000 98	1.125 57			0.019 08			0.125 51			0.001 30				775		32			766			9			762		7
20BXC18-26		150.29			117.24			0.78					0.065 67		0.001 23	1.143 36			0.022 19			0.126 51			0.001 33				796		39			774			11			768		8
20BXC18-27		89.83			111.01			1.24					0.065 33		0.002 18	1.128 66			0.039 72			0.125 62			0.001 83				785		70			767			19			763		11
20BXC18-28		111.39			183.13			1.64					0.071 53		0.001 64	1.223 36			0.029 30			0.124 16			0.001 76				973		47			811			13			754		10
20BXC18-29		113.22			176.97			1.56					0.066 61		0.002 16	1.209 31			0.036 72			0.131 08			0.002 66				826		68			805			17			794		15
样品编号			w_B/10^-6			Th/U			w(Y)/10^-6			同位素比值及误差															同位素年龄及误差/Ma
样品编号			U	Th		Th/U			w(Y)/10^-6			²⁰⁷Pb/²⁰⁶Pb			1σ		²⁰⁷Pb/²³⁵U	1σ			²⁰⁶Pb/²³⁸U			1σ			²⁰⁷Pb/²⁰⁶Pb			1σ			²⁰⁷Pb/²³⁵U			1σ			²⁰⁶Pb/²³⁸U			1σ
20BXC18-30			73.66	148.64		2.02						0.062 81			0.002 07		1.084 01	0.033 18			0.125 50			0.001 59			702			70			746			16			762			9
20BXC18-31			145.70	180.40		1.24						0.065 91			0.001 68		1.162 44	0.028 15			0.128 08			0.001 69			804			54			783			13			777			10
20BXC18-32			92.17	99.59		1.08						0.064 74			0.001 96		1.157 78	0.034 34			0.129 51			0.001 70			766			64			781			16			785			10
20BXC18-33			96.64	119.80		1.24						0.067 01			0.002 22		1.157 67	0.037 98			0.125 85			0.002 43			838			69			781			18			764			14
20BXC18-34			79.37	175.88		2.22						0.067 58			0.001 95		1.149 47	0.031 35			0.123 52			0.001 67			856			60			777			15			751			10
20BXC13-01			79.92	107.19		1.34						0.066 51			0.002 51		1.148 86	0.042 45			0.125 81			0.002 06			823			79			777			20			764			12
20BXC13-02			67.39	196.06		2.91						0.064 01			0.002 01		1.158 69	0.038 85			0.131 61			0.002 04			742			67			781			18			797			12
20BXC13-03			79.12	94.30		1.19						0.063 63			0.002 15		1.100 93	0.036 94			0.125 73			0.002 47			729			72			754			18			763			14
20BXC13-04			67.54	110.81		1.64						0.062 85			0.003 79		1.069 15	0.066 29			0.123 40			0.002 89			703			128			738			33			750			17
20BXC13-05			52.75	113.51		2.15						0.064 00			0.002 47		1.100 08	0.047 47			0.125 32			0.002 53			741			82			753			23			761			14
20BXC13-06			112.11	83.45		0.74						0.064 03			0.001 71		1.114 37	0.032 21			0.126 06			0.002 10			743			56			760			15			765			12
20BXC13-07			87.09	76.06		0.87						0.064 68			0.002 54		1.110 36	0.042 15			0.125 22			0.002 77			764			83			758			20			761			16
20BXC13-08			108.35	98.96		0.91						0.066 70			0.002 27		1.154 22	0.037 30			0.124 99			0.002 98			828			71			779			18			759			17
20BXC13-09			40.41	52.74		1.30						0.061 95			0.003 74		1.086 13	0.083 12			0.124 26			0.003 54			673			129			747			40			755			20
20BXC13-10			49.48	47.47		0.96						0.063 38			0.002 88		1.110 76	0.053 94			0.126 30			0.002 32			721			97			759			26			767			13
20BXC13-11			83.34	113.02		1.36						0.064 32			0.002 90		1.105 87	0.030 08			0.127 20			0.003 91			752			95			756			15			772			22
20BXC13-12			79.43	140.52		1.77						0.065 11			0.002 16		1.110 88	0.041 00			0.123 48			0.002 37			778			70			759			20			751			14
20BXC13-13			171.43	233.10		1.36						0.065 10			0.001 94		1.135 03	0.032 30			0.126 67			0.002 68			778			63			770			15			769			15
20BXC13-14			70.03	115.22		1.65						0.065 18			0.002 15		1.138 78	0.038 70			0.127 16			0.002 48			780			69			772			18			772			14
20BXC13-15			25.66	26.33		1.03						0.065 88			0.005 18		1.079 63	0.075 58			0.123 11			0.003 64			803			165			743			37			748			21
20BXC13-16			46.62	67.34		1.44						0.064 52			0.002 67		1.164 28	0.048 62			0.132 13			0.002 66			759			87			784			23			800			15
20BXC13-17			58.37	79.27		1.36						0.066 05			0.002 20		1.146 37	0.043 76			0.125 66			0.002 49			808			70			776			21			763			14
20BXC13-18			105.85	141.78		1.34						0.065 74			0.002 08		1.153 15	0.036 27			0.127 54			0.001 99			798			66			779			17			774			11
20BXC13-19			82.86	95.38		1.15						0.065 25			0.002 29		1.125 45	0.041 53			0.125 29			0.001 83			783			74			766			20			761			10
20BXC13-20			182.95	312.20		1.71						0.066 90			0.002 15		1.178 83	0.045 06			0.127 39			0.002 66			835			67			791			21			773			15
20BXC13-21			56.00	58.79		1.05						0.064 65			0.003 11		1.158 40	0.056 74			0.130 58			0.002 30			763			101			781			27			791			13
20BXC13-22			83.39	124.51		1.49						0.066 16			0.001 99		1.247 57	0.040 27			0.136 76			0.002 21			811			63			822			18			826			13
20BXC13-23			87.81	106.35		1.21						0.066 50			0.001 81		1.271 39	0.037 32			0.139 01			0.002 13			822			57			833			17			839			12
20BXC13-24			40.35	76.09		1.89						0.066 26			0.003 08		1.133 69	0.050 70			0.125 62			0.002 47			815			97			770			24			763			14
20BXC13-25			68.76	59.07		0.86						0.068 00			0.002 95		1.171 58	0.049 14			0.126 50			0.002 58			868			90			787			23			768			15
20BXC13-26			43.38	67.22		1.55						0.065 38			0.002 41		1.173 20	0.044 47			0.130 92			0.002 38			787			78			788			21			793			14
20BXC13-27			167.02	204.51		1.22						0.065 84			0.001 10		1.242 12	0.023 99			0.136 90			0.001 65			801			35			820			11			827			9
20BXC13-28			66.28	137.85		2.08						0.064 33			0.002 30		1.098 47	0.041 03			0.124 78			0.002 05			752			75			753			20			758			12
20BXC13-29			28.73	30.31		1.05						0.065 21			0.003 36		1.148 36	0.062 05			0.127 71			0.002 33			781			108			776			29			775			13
20BXC13-30			248.92	437.35		1.76						0.066 87			0.000 85		1.248 25	0.019 95			0.135 17			0.001 51			834			26			823			9			817			9
20BXC13-32			60.14	48.26		0.80						0.067 47			0.002 93		1.148 12	0.053 16			0.123 51			0.002 36			852			90			776			25			751			14
20BXC13-31			82.77	96.81		1.17						0.064 41			0.001 60		1.130 48	0.032 08			0.126 86			0.001 65			755			52			768			15			770			9

样品编号	位置	坐标	层位	岩性	定年方法	²⁰⁶Pb/²³⁵U加权平均年龄/Ma	文献来源
XAP-1	重庆秀山	N 28°18'55″,E 108°50'46″	红子溪组顶部	凝灰岩	SHRIMP	792±9 (N=14,MSWD=1.5)	[35]
XZT	重庆秀山		板溪群顶部	凝灰岩	SHRIMP	786±11 (N=11,MSWD=1.3)	[36]
0509	湖南怀化	N 27°35'54″,E 109°42'24″	牛牯坪组上部	凝灰质粉砂岩	SHRIMP	725±10 (N=18,MSWD=0.28)	[37]
PT-3	湖南坪坦	N 26°01'06″,E 109°44'01″	拱洞组上部	沉凝灰岩	LA-ICP-MS	754±10 (N=9,MSWD=4.5)	[38]
T02429-14	湖南壶瓶山镇		渫水河组上部	凝灰岩	SHRIMP	758±23 (N=5,MSWD=0.95)	[39]
T021023-2A	湖南壶瓶山镇		张家湾组(老崖山组)顶部	凝灰岩	SHRIMP	809±16 (N=12,MSWD=1.13)	[39]
T091223-2	湖南临湘	N 29°34'49″,E 113°17'19″	张家湾组	凝灰岩	SHRIMP	802.6±7.6 (N=12,MSWD=1.01)	[40]
04SC11	湖南古丈	N 28°33'13″,E 109°52'39″	五强溪组中部	火山灰	LA-ICP-MS	809.3±8.4 (N=20,MSWD=2.4)	[41]
	湖南衡阳	N 27°23'55″,E 112°17'50″	砖墙湾组上部	凝灰岩	LA-ICP-MS	774.9±2.6 (N=24,MSWD=1.4)	[42]
20-1	湖南小渔溪	N 27°29'15″,E 108°25'23″	马底驿组	凝灰岩	SHRIMP	813.5±9.6 (N=16,MSWD=1.5)	[14]
2010BX02	湖南马底驿	N 28°25'42″,E 110°39'53″	横路冲组	凝灰岩	LA-ICP-MS	820±3 (N=86,MSWD=4.4)	[43]
SQP	湖南隆回	N 27°30'48″,E 110°49'27″	石桥铺组	火山角砾岩	SHRIMP	828.8±9.6 (N=10,MSWD=0.69)	[44]
T091225-1	湖南沧水铺	N 29°24'50″,E 113°24'15″	沧水铺群上部	火山集块岩	SHRIMP	821±13 (N=22,MSWD=1.9)	[12]
N3	湖南沧水铺		沧水铺组底部	火山岩	SHRIMP	814±12 (N=17,MSWD=3.2)	[10]
CSP-8	湖南沧水铺		沧水铺组	安山岩	SHRIMP	824±7 (N=10,MSWD=1.0)	[45]
CSP-35	湖南沧水铺		沧水铺组	安山岩	SIMS	822±28 (N=6,MSWD=0.1)	[45]
Z9	江西东桥		岩门寨组上部	凝灰岩	LA-ICP-MS	717.2±8.9 (N=11,MSWD=0.49)	[46]
DZ-1	贵州敦寨	N 26°31'46″,E 109°14'12″	隆里组顶部	沉凝灰岩	LA-ICP-MS	733±18 (N=4,MSWD=6.9)	[38]
20BXC41 & WSPL	贵州抱溪村	N 27°32'16″,E 109°17'01″	平略组中部	沉凝灰岩	LA-ICP-MS	759.1±3.9 (N=26,MSWD=0.38)	本次研究
20BXC18	贵州抱溪村	N 27°32'15″,E 109°17'11″	平略组底部	凝灰岩	LA-ICP-MS	760.2±4.1 (N=25,MSWD=0.39)	本次研究
20BXC13	贵州抱溪村	N 27°32'01″,E 109°17'27″	清水江组上部	凝灰岩	LA-ICP-MS	763.8±5.5 (N=24,MSWD=0.29)	本次研究
TRWE-1	贵州瓦屋	N 27°37'52″,E 109°22'16″	清水江组(鹅家坳组)中部	凝灰岩	SHRIMP	782±8 (N=12,MSWD=1.6)	[47]
QZXB-3	贵州清镇	N 26°42'27″,E 106°29'37″	清水江组(鹅家坳组)中部	凝灰岩	SHRIMP	780±9 (N=12,MSWD=1.5)	[47]
TRWW-1	贵州瓦屋	N 27°38'20″,E 109°21'48″	清水江组(鹅家坳组)下部	沉凝灰岩	SHRIMP	785±8 (N=13,MSWD=1.5)	[47]
08SC31	贵州锦屏		清水江组上部	凝灰岩	SIMS	773.8±5.4 (N=17,MSWD=0.97)	[48]
T09424-1	贵州雷山	N 26°24'31″,E 109°06'47″	清水江组	凝灰岩	SHRIMP	773.6±7.9 (N=9,MSWD=1.13)	[11]
08SC07	贵州台江		番召组上部	凝灰质粉砂岩	SIMS	804.8±3.6 (N=38,MSWD=0.5)	[48]
T09419-5	贵州梵净山	N 27°50'49″,E 108°46'13″	甲路组	火山凝灰岩	SHRIMP	814±6.3 (N=17,MSWD=1.5)	[11]
CL4	贵州加扒		甲路组底部	基性火山岩	TIMS	815.8±4.9	[49]
2013SC05-06	广西四堡、高友		拱洞组顶部	凝灰质粉砂岩	SIMS	715.8±2.5 (N=24,MSWD=0.74)	[16]
DJ-1	广西斗江		拱洞组顶部	凝灰岩	LA-ICP-MS	716.8±6.8 (N=7,MSWD=0.39)	[50]
PL-1	广西瓢里	N 25°51'26″,E 109°48'57″	拱洞组上部	沉凝灰岩	LA-ICP-MS	734±7 (N=10,MSWD=2.6)	[38]
HTG-N1	广西丹洲	N 25°35'13″,E 109°31'57″	拱洞组底部	凝灰岩	LA-ICP-MS	781±5 (N=9,MSWD=0.04)	[17]
Z2011617-3	广西罗城	N 26°48'22″,E 109°49'11″	拱洞组	凝灰岩	SHRIMP	786.8±5.6 (N=15,MSWD=1.3)	[13]
GB04-59	广西三门	N 25°49'48″,E 109°47'53″	三门街组	流纹英安岩	SHRIMP	765±14 (N=10,MSWD=1.6)	[51]
HTH-N1	广西丹洲	N 25°34'46″,E 109°32'44″	合桐组中部	凝灰岩	LA-ICP-MS	801±4 (N=11,MSWD=0.08)	[17]
Sh2011616-3	广西四堡	N 25°05'18″,E 108°48'41″	合桐组	凝灰岩	SHRIMP	801±3 (N=11,MSWD=0.94)	[13]

样品编号	位置	坐标	层位	岩性	定年方法	²⁰⁶Pb/²³⁵U加权平均年龄/Ma	文献来源
XAP-1	重庆秀山	N 28°18'55″,E 108°50'46″	红子溪组顶部	凝灰岩	SHRIMP	792±9 (N=14,MSWD=1.5)	[35]
XZT	重庆秀山		板溪群顶部	凝灰岩	SHRIMP	786±11 (N=11,MSWD=1.3)	[36]
0509	湖南怀化	N 27°35'54″,E 109°42'24″	牛牯坪组上部	凝灰质粉砂岩	SHRIMP	725±10 (N=18,MSWD=0.28)	[37]
PT-3	湖南坪坦	N 26°01'06″,E 109°44'01″	拱洞组上部	沉凝灰岩	LA-ICP-MS	754±10 (N=9,MSWD=4.5)	[38]
T02429-14	湖南壶瓶山镇		渫水河组上部	凝灰岩	SHRIMP	758±23 (N=5,MSWD=0.95)	[39]
T021023-2A	湖南壶瓶山镇		张家湾组(老崖山组)顶部	凝灰岩	SHRIMP	809±16 (N=12,MSWD=1.13)	[39]
T091223-2	湖南临湘	N 29°34'49″,E 113°17'19″	张家湾组	凝灰岩	SHRIMP	802.6±7.6 (N=12,MSWD=1.01)	[40]
04SC11	湖南古丈	N 28°33'13″,E 109°52'39″	五强溪组中部	火山灰	LA-ICP-MS	809.3±8.4 (N=20,MSWD=2.4)	[41]
	湖南衡阳	N 27°23'55″,E 112°17'50″	砖墙湾组上部	凝灰岩	LA-ICP-MS	774.9±2.6 (N=24,MSWD=1.4)	[42]
20-1	湖南小渔溪	N 27°29'15″,E 108°25'23″	马底驿组	凝灰岩	SHRIMP	813.5±9.6 (N=16,MSWD=1.5)	[14]
2010BX02	湖南马底驿	N 28°25'42″,E 110°39'53″	横路冲组	凝灰岩	LA-ICP-MS	820±3 (N=86,MSWD=4.4)	[43]
SQP	湖南隆回	N 27°30'48″,E 110°49'27″	石桥铺组	火山角砾岩	SHRIMP	828.8±9.6 (N=10,MSWD=0.69)	[44]
T091225-1	湖南沧水铺	N 29°24'50″,E 113°24'15″	沧水铺群上部	火山集块岩	SHRIMP	821±13 (N=22,MSWD=1.9)	[12]
N3	湖南沧水铺		沧水铺组底部	火山岩	SHRIMP	814±12 (N=17,MSWD=3.2)	[10]
CSP-8	湖南沧水铺		沧水铺组	安山岩	SHRIMP	824±7 (N=10,MSWD=1.0)	[45]
CSP-35	湖南沧水铺		沧水铺组	安山岩	SIMS	822±28 (N=6,MSWD=0.1)	[45]
Z9	江西东桥		岩门寨组上部	凝灰岩	LA-ICP-MS	717.2±8.9 (N=11,MSWD=0.49)	[46]
DZ-1	贵州敦寨	N 26°31'46″,E 109°14'12″	隆里组顶部	沉凝灰岩	LA-ICP-MS	733±18 (N=4,MSWD=6.9)	[38]
20BXC41 & WSPL	贵州抱溪村	N 27°32'16″,E 109°17'01″	平略组中部	沉凝灰岩	LA-ICP-MS	759.1±3.9 (N=26,MSWD=0.38)	本次研究
20BXC18	贵州抱溪村	N 27°32'15″,E 109°17'11″	平略组底部	凝灰岩	LA-ICP-MS	760.2±4.1 (N=25,MSWD=0.39)	本次研究
20BXC13	贵州抱溪村	N 27°32'01″,E 109°17'27″	清水江组上部	凝灰岩	LA-ICP-MS	763.8±5.5 (N=24,MSWD=0.29)	本次研究
TRWE-1	贵州瓦屋	N 27°37'52″,E 109°22'16″	清水江组(鹅家坳组)中部	凝灰岩	SHRIMP	782±8 (N=12,MSWD=1.6)	[47]
QZXB-3	贵州清镇	N 26°42'27″,E 106°29'37″	清水江组(鹅家坳组)中部	凝灰岩	SHRIMP	780±9 (N=12,MSWD=1.5)	[47]
TRWW-1	贵州瓦屋	N 27°38'20″,E 109°21'48″	清水江组(鹅家坳组)下部	沉凝灰岩	SHRIMP	785±8 (N=13,MSWD=1.5)	[47]
08SC31	贵州锦屏		清水江组上部	凝灰岩	SIMS	773.8±5.4 (N=17,MSWD=0.97)	[48]
T09424-1	贵州雷山	N 26°24'31″,E 109°06'47″	清水江组	凝灰岩	SHRIMP	773.6±7.9 (N=9,MSWD=1.13)	[11]
08SC07	贵州台江		番召组上部	凝灰质粉砂岩	SIMS	804.8±3.6 (N=38,MSWD=0.5)	[48]
T09419-5	贵州梵净山	N 27°50'49″,E 108°46'13″	甲路组	火山凝灰岩	SHRIMP	814±6.3 (N=17,MSWD=1.5)	[11]
CL4	贵州加扒		甲路组底部	基性火山岩	TIMS	815.8±4.9	[49]
2013SC05-06	广西四堡、高友		拱洞组顶部	凝灰质粉砂岩	SIMS	715.8±2.5 (N=24,MSWD=0.74)	[16]
DJ-1	广西斗江		拱洞组顶部	凝灰岩	LA-ICP-MS	716.8±6.8 (N=7,MSWD=0.39)	[50]
PL-1	广西瓢里	N 25°51'26″,E 109°48'57″	拱洞组上部	沉凝灰岩	LA-ICP-MS	734±7 (N=10,MSWD=2.6)	[38]
HTG-N1	广西丹洲	N 25°35'13″,E 109°31'57″	拱洞组底部	凝灰岩	LA-ICP-MS	781±5 (N=9,MSWD=0.04)	[17]
Z2011617-3	广西罗城	N 26°48'22″,E 109°49'11″	拱洞组	凝灰岩	SHRIMP	786.8±5.6 (N=15,MSWD=1.3)	[13]
GB04-59	广西三门	N 25°49'48″,E 109°47'53″	三门街组	流纹英安岩	SHRIMP	765±14 (N=10,MSWD=1.6)	[51]
HTH-N1	广西丹洲	N 25°34'46″,E 109°32'44″	合桐组中部	凝灰岩	LA-ICP-MS	801±4 (N=11,MSWD=0.08)	[17]
Sh2011616-3	广西四堡	N 25°05'18″,E 108°48'41″	合桐组	凝灰岩	SHRIMP	801±3 (N=11,MSWD=0.94)	[13]