Petrogeochemistry and geochronology of biotite monzonitic granites in the Horqin Right Front Banner area, Inner Mongolia and the geological significance

doi:10.13745/j.esf.sf.2020.4.9

Abstract

Abstract:

The Xing-Meng orogenic belt has very complex structural and distribution patterns. Its evolutionary process, especially the final time limit for the closure of the “scissors” type of the Paleo-Asian Ocean and the subsequent land-land collision process have not been determined. The study area is located in the eastern section of the Xing-Meng orogenic belt, where the geotectonic position is clamped between the Hegenshan-Heihe and Solon-Siramulon-Changchun fault zones. It provides an important window for studying the geological evolution of the eastern section of the Central Asian orogenic belt. The Qianqi biotite monzogranite body in the right wing of Horqin, Inner Mongolia has the shape of a rock plant, with a 400 m NE-trending long axis and a 150-250 m short axis. The north side intrudes into the Dashizhai Formation, and the south part is in fault contact with the Linxi Formation. The granite rocks had medium to fine-grained granitic and massive structures. They were mainly composed of potash feldspar (40%), plagioclase (25%), quartz (20%), biotite (14%) and a small amount of chlorite (1%), and had the LA-ICP-MS zircon U-Pb age of 221.1±2.1 Ma, consistent with formation in the Late Triassic. The geochemical characteristics of rocks were high in SiO₂(68.46%-70.38%) and K₂O+Na₂O(9.02%-9.39%) and low in P₂O₅(0.09%-0.17%), MgO(0.60%-0.80%), TiO₂(0.54%-0.58%) and medium K₂O/Na₂O(0.90-1.54) contents, with obvious fractionation of light and heavy rare earth elements (LREE and HREE), relative enrichment of LREE (ΣLREE content (163.55-226.55)×10^-6) and depletion of HREE (ΣHREE content (11.96-21.67)×10^-6). The granite type is peraluminous high-k calc alkaline I-type, indicating a post collisional/orogenic tectonic environment of the Late Permian Triassic magmatic rocks on the northern margin of the North China block. Based on previous research results and regional geological data, we infer that the Qianqi biotite monzogranite was formed under a lithosphere delamination and asthenosphere upwelling environment.

Key words: Horqin Right Front Banner area, Late Triassic, I-type granite, zircon U-Pb age

CLC Number:

CHEN Zehan, ZHANG Jia, ZHAO Zhidan, HAO Sen, ZHANG Liqiang, CAO Yuanbao. Petrogeochemistry and geochronology of biotite monzonitic granites in the Horqin Right Front Banner area, Inner Mongolia and the geological significance[J]. Earth Science Frontiers, 2020, 27(4): 172-183.

Figures/Tables 9

References 52

[1]	陈衍景, 翟明国, 蒋少涌. 华北大陆边缘造山过程与成矿研究的重要进展和问题[J]. 岩石学报, 2009(11):2695-2726.
[2]	XIAO W, HAN C, YUAN C, et al. Middle Cambrian to Permian subduction-related accretionary orogenesis of Northern Xinjiang, NW China: implications for the tectonic evolution of central Asia[J]. Journal of Asian Earth Sciences, 2008, 32(2/3/4):102-117.
[3]	ZHENG Y, XIAO W, ZHAO G. Introduction to tectonics of China[J]. Gondwana Research, 2013, 23(4):1189-1206.
[4]	柳长峰, 刘文灿, 周志广. 内蒙古四子王旗地区古生代—早中生代侵入岩活动期次、特征及构造背景[J]. 地质学报, 2014, 88(6):992-1002.
[5]	关庆彬, 刘正宏, 陈煜. 内蒙古林西地区西耳子黑云母二长花岗成因及其地质意义[J]. 地质论评, 2017(增刊1):249-250.
[6]	郝增元, 牛永峰, 陈萌超, 等. 内蒙古石哈河地区黑云母二长花岗岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J]. 中国地质, 2016, 43(1):72-80.
[7]	王挽琼, 刘正宏, 王兴安, 等. 内蒙古乌拉特中旗海西期黑云母二长花岗岩锆石SHRIMP U-Pb年龄及其地质意义[J]. 吉林大学学报(地球科学版), 2012, 42(6):1771-1782.
[8]	罗红玲, 吴泰然, 赵磊. 乌拉特中旗二叠纪I型花岗岩类地球化学特征及构造意义[J]. 北京大学学报(自然科学版), 2010, 46(5):805-820.
[9]	李晓海, 姚玉来, 李文博, 等. 内蒙古扎鲁特旗三叠纪黑云母二长花岗岩特征[J]. 地质与资源, 2016, 25(1):11-16.
[10]	杨勇, 刘森荣, 肖明顺, 等. 内蒙古库伦旗地区黑云母二长花岗岩地球化学特征及其地质意义[J]. 矿物岩石, 2014, 34(4):54-60.
[11]	赵英利. 大兴安岭中南部二叠纪砂岩物源分析对晚古生代区域构造演化的制约[D]. 长春: 吉林大学, 2010.
[12]	李文国. 内蒙古自治区岩石地层[M]. 武汉: 中国地质大学出版社, 1996.
[13]	周琴, 吴福元, 储著银, 等. 吉林蛟河地幔橄榄岩捕虏体的Sr-Nd-Hf-Os同位素特征与岩石圈地幔时代[J]. 岩石学报, 2007, 23(6):1269-1280.
[14]	NASDALA L, HOFMEISTER W, NORBERG N, et al. Zircon M257: a homogeneous natural reference material for the ion microprobe U-Pb analysis of zircon[J]. Geostandards and Geoanalytical Research, 2008, 32(3):247-265. DOI URL
[15]	LIU Y, HU Z, ZONG K, et al. Reappraisement and refinement of zircon U-Pb isotope and trace element analyses by LA-ICP-MS[J]. Chinese Science Bulletin, 2010, 55(15):1535-1546. DOI URL
[16]	候可军, 李延河, 田有荣. LA-MC-ICP-MS锆石微区原位U-Pb定年技术[J]. 矿床地质, 2009, 28(4):481-492.
[17]	吴元保, 郑永飞. 锆石成因矿物学研究及其对U-Pb年龄解释的制约[J]. 科学通报, 2004(16):1589-1604.
[18]	MANIAR P. Tectonic discrimination of granitoids[J]. Geological Society of America Bulletin, 1989, 101(5):635-643. DOI URL
[19]	PEARCE J A, HARRIS N B W, TINDLE A G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks[J]. Journal of Petrology, 1984, 25(4):956-983. DOI URL
[20]	SUN S S, MCDONOUGH W F. Chemical and isotopic systematics of oceanic basalts: implications for mantle composition and processes[J]. Geological Society, London, Special Publication, 1989, 42(1):313-345. DOI URL
[21]	薛建平, 刘美玉, 李钢柱, 等. 内蒙古索伦山地区哈尔博格托尔TTG岩锆石年代学、岩石地球化学及大地构造意义[J]. 地学前缘, 2018, 25(3):230-239.
[22]	王珍珍, 刘栋, 赵志丹, 等. 冈底斯带南部桑日高分异Ⅰ型花岗岩的岩石成因及其动力学意义[J]. 岩石学报, 2017, 33(8):2479-2493.
[23]	吴福元, 李献华, 杨进辉, 等. 花岗岩成因研究的若干问题[J]. 岩石学报, 2007, 23(6):1217-1238.
[24]	WHALEN J B, CURRIE K L, CHAPPELL B W. A-type granites: geochemical characteristics, discrimination and petrogenesis[J]. Contributions to Mineralogy and Petrology, 1987, 95(4):407-419. DOI URL
[25]	COLLINS S, GROUDINE M. Amplification of endogenous myc-related DNA sequences in a human myeloid leukaemia cell line[J]. Nature, 1982, 298:679-681. DOI URL
[26]	陈培荣, 章邦桐, 孔兴功, 等. 赣南寨背A型花岗岩体的地球化学特征及其构造地质意义[J]. 岩石学报, 1998, 14(3):289-298.
[27]	庞迎春, 程顺波. 花岗岩分类问题研究现状[J]. 资源环境与工程, 2009(2):119-122.
[28]	张旗, 王元龙, 金惟俊, 等. 造山前、造山和造山后花岗岩的识别[J]. 地质通报, 2008, 27(1):1-18.
[29]	LIEGEOIS J, NAVEZ J, HERTOGE J, et al. Contrasting origin of post-collisional high-K calc-alkaline and shoshonitic versus alkaline and peralkaline granitoids: the use of sliding normalization[J]. Lithos, 1998, 45(1/2/3/4):1-28.
[30]	BATCHELOR R A, BOWDEN P. Petrogenetic interpretation of granitoid rock series using multicationic parameters[J]. Chemical Geology, 1985, 48(1):43-55.
[31]	PEARCE J A. Sources and settings of granitic rocks[J]. Episodes, 1996, 19(4):120-125. DOI URL
[32]	任纪舜. 论中国大陆岩石圈构造的基本特征[J]. 中国区域地质, 1991(4):289-293.
[33]	施光海, 刘敦一, 张福勤, 等. 中国内蒙古锡林郭勒杂岩SHRIMP锆石U-Pb年代学及意义[J]. 科学通报, 2003, 48(20):2187-2192.
[34]	张拴宏, 赵越, 刘建民, 等. 华北地块北缘晚古生代—早中生代岩浆活动期次、特征及构造背景[J]. 岩石矿物学杂志, 2010, 29(6):824-842.
[35]	贾小辉, 王强, 唐功建. A型花岗岩的研究进展及意义[J]. 大地构造与成矿学, 2009, 33(3):465-480.
[36]	罗镇宽, 苗来成, 关康, 等. 河北张家口水泉沟岩体SHRIMP年代学研究及其意义[J]. 地球化学, 2001, 30(2):116-122.
[37]	倪志耀. 冀北蜕变榴辉岩、异剥钙榴岩和变质橄榄岩及其地质意义[D]. 北京: 中国科学院地质与地球物理研究所, 2002.
[38]	张拴宏, 赵越, 宋彪, 等. 冀北隆化早前寒武纪高级变质区内的晚古生代片麻状花岗闪长岩: 锆石SHRIMP U-Pb年龄及其构造意义[J]. 岩石学报, 2004, 20(3):621-626.
[39]	凤永刚, 刘树文, 吕勇军, 等. 冀北凤山晚古生代闪长岩-花岗质岩石的成因: 岩石地球化学、锆石U-Pb年代学及Hf同位素制约[J]. 北京大学学报(自然科学版), 2009, 45(1):59-70.
[40]	毛德宝, 陈志宏, 钟长汀, 等. 冀北北岔沟门地区中生代侵入岩地质年代学和地球化学特征研究[J]. 岩石学报, 2003, 19(4):661-674.
[41]	王惠初, 赵凤清, 李惠民, 等. 冀北闪长质岩石的锆石SHRIMP U-Pb年龄: 晚古生代岩浆弧的地质记录[J]. 岩石学报, 2007, 23(3):597-604.
[42]	任荣, 牟保磊, 韩宝福, 等. 河北矾山钾质碱性超镁铁岩-正长岩杂岩体的锆石SHRIMP U-Pb年龄[J]. 岩石学报, 2009, 25(3):588-594.
[43]	韩宝福, 加加美宽雄, 李惠民. 河北平泉光头山碱性花岗岩的时代、 Nd-Sr同位素特征及其对华北早中生代壳幔相互作用的意义[J]. 岩石学报, 2004, 20(6):1375-1388.
[44]	阎国翰, 牟保磊, 许保良, 等. 燕辽—阴山三叠纪碱性侵入岩年代学和Sr, Nd, Pb同位素特征及意义[J]. 中国科学: D辑, 2000, 30(4):383-387.
[45]	任康绪, 阎国翰, 牟保磊, 等. 辽西凌源河坎子碱性杂岩体地球化学特征及地质意义[J]. 岩石矿物学杂志, 2004, 23(3):193-202.
[46]	WU F, WILDE S A, ZHANG G, et al. Geochronology and petrogenesis of the post-orogenic Cu-Ni sulfide-bearing mafic-ultramafic complexes in Jilin Province, NE China[J]. Journal of Asian Earth Sciences, 2004, 23(5):781-797. DOI URL
[47]	王荃, 刘雪亚, 李锦轶. 中国内蒙古中部的古板块构造[J]. 地球学报, 1991(1):1-15.
[48]	SENGOR A M C, NATAL'IN B A, BURTMAN V S. Evolution of the Altaid tectonic collage and Palaeozoic crustal growth in Eurasia[J]. Nature, 1993, 364:299-307. DOI URL
[49]	尚庆华. 北方造山带内蒙古中、东部地区二叠纪放射虫的发现及意义[J]. 科学通报, 2004, 49(24):2574-2579.
[50]	ZHANG S, ZHAO Y, LIU X, et al. Late Paleozoic to Early Mesozoic mafic-ultramafic complexes from the northern North China Block: constraints on the composition and evolution of the lithospheric mantle[J]. Lithos, 2009, 110(1/2/3/4):229-246. DOI URL
[51]	GREGORY A D, XU B, ZHENG Y D, et al. Indosinian extension in the Solonker suture zone: the Sonid Zuoqi metamorphic core complex, Inner Mongolia, China[J]. 地学前缘, 2004, 11(3):135-144.
[52]	RITTS B D, DARBY B J, COPE T. Early Jurassic extensional basin formation in the Daqing Shan segment of the Yinshan belt, northern North China Block, Inner Mongolia[J]. Tectonophysics, 2001, 339(3):239-258. DOI URL

测点	w_B/10^-6			Th/U	同位素比值及误差						年龄及误差/Ma
测点	Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb	±σ	²⁰⁷Pb/²³⁵U	±σ	²⁰⁶Pb/²³⁸U	±σ	²⁰⁷Pb/²⁰⁶Pb	±σ	²⁰⁷Pb/²³⁵U	±σ	²⁰⁶Pb/²³⁸U	±σ
1	2.60	34.40	59.32	0.58	0.094 83	0.027 61	0.431 18	0.121 45	0.034 54	0.001 45	1 525	568	364	86	219	9
2	12.12	226.87	253.47	0.90	0.063 37	0.008 52	0.311 74	0.046 18	0.034 93	0.000 80	720	289	276	36	221	5
3	3.68	55.32	80.08	0.69	0.060 71	0.007 24	0.293 07	0.034 45	0.034 96	0.000 98	628	264	261	27	222	6
4	9.61	154.28	159.39	0.97	0.125 50	0.032 89	0.662 09	0.219 56	0.035 08	0.001 48	2 035	479	516	135	222	9
5	5.94	113.20	120.71	0.94	0.074 38	0.009 11	0.399 01	0.058 90	0.034 72	0.000 79	1 052	249	341	43	220	5
6	5.96	122.16	171.90	0.71	0.059 31	0.004 25	0.285 70	0.020 22	0.035 07	0.000 80	589	157	255	16	222	5
7	3.64	58.50	73.39	0.80	0.083 79	0.007 52	0.407 22	0.032 72	0.035 62	0.000 97	1 288	176	347	24	226	6
8	4.39	71.63	122.78	0.58	0.066 25	0.017 00	0.316 35	0.080 01	0.035 08	0.001 10	813	555	279	62	222	7
9	3.30	40.39	76.38	0.53	0.057 61	0.009 92	0.271 95	0.046 93	0.036 28	0.001 74	522	385	244	37	230	11
10	2.53	37.89	70.44	0.54	0.045 11	0.024 90	0.200 12	0.105 62	0.035 62	0.001 49	error		185	90	226	9
11	5.08	75.20	112.25	0.67	0.077 90	0.009 24	0.371 45	0.040 78	0.034 65	0.000 75	1 144	238	321	30	220	5
12	2.72	39.55	74.75	0.53	0.056 49	0.008 99	0.259 20	0.038 50	0.034 97	0.000 71	472	357	234	31	222	4
13	4.50	53.27	99.42	0.54	0.075 06	0.018 35	0.350 73	0.072 36	0.036 28	0.001 22	1 070	508	305	54	230	8
14	4.94	95.59	99.76	0.96	0.056 89	0.011 23	0.275 08	0.057 38	0.034 74	0.000 92	487	385	247	46	220	6
15	4.60	70.66	122.96	0.57	0.069 80	0.006 55	0.339 91	0.033 27	0.035 23	0.000 70	924	194	297	25	223	4
16	3.82	54.76	92.72	0.59	0.073 53	0.006 74	0.363 51	0.037 99	0.035 51	0.000 87	1 028	187	315	28	225	5
17	3.24	46.65	87.32	0.53	0.098 73	0.027 09	0.463 44	0.128 43	0.034 01	0.000 78	2 000	532	387	89	216	5
18	4.06	79.94	78.30	1.02	0.054 11	0.005 14	0.263 08	0.025 06	0.035 40	0.001 04	376	215	237	20	224	7
19	2.09	30.62	54.76	0.56	0.093 52	0.018 24	0.441 56	0.081 12	0.035 45	0.001 06	1 498	376	371	57	225	7
20	2.31	30.43	55.24	0.55	0.045 45	0.009 75	0.215 05	0.045 73	0.035 24	0.000 96	error		198	38	223	6
21	4.52	51.36	97.92	0.52	0.087 46	0.011 91	0.408 88	0.050 33	0.034 88	0.000 86	1 372	265	348	36	221	5

测点	w_B/10^-6			Th/U	同位素比值及误差						年龄及误差/Ma
测点	Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb	±σ	²⁰⁷Pb/²³⁵U	±σ	²⁰⁶Pb/²³⁸U	±σ	²⁰⁷Pb/²⁰⁶Pb	±σ	²⁰⁷Pb/²³⁵U	±σ	²⁰⁶Pb/²³⁸U	±σ
1	2.60	34.40	59.32	0.58	0.094 83	0.027 61	0.431 18	0.121 45	0.034 54	0.001 45	1 525	568	364	86	219	9
2	12.12	226.87	253.47	0.90	0.063 37	0.008 52	0.311 74	0.046 18	0.034 93	0.000 80	720	289	276	36	221	5
3	3.68	55.32	80.08	0.69	0.060 71	0.007 24	0.293 07	0.034 45	0.034 96	0.000 98	628	264	261	27	222	6
4	9.61	154.28	159.39	0.97	0.125 50	0.032 89	0.662 09	0.219 56	0.035 08	0.001 48	2 035	479	516	135	222	9
5	5.94	113.20	120.71	0.94	0.074 38	0.009 11	0.399 01	0.058 90	0.034 72	0.000 79	1 052	249	341	43	220	5
6	5.96	122.16	171.90	0.71	0.059 31	0.004 25	0.285 70	0.020 22	0.035 07	0.000 80	589	157	255	16	222	5
7	3.64	58.50	73.39	0.80	0.083 79	0.007 52	0.407 22	0.032 72	0.035 62	0.000 97	1 288	176	347	24	226	6
8	4.39	71.63	122.78	0.58	0.066 25	0.017 00	0.316 35	0.080 01	0.035 08	0.001 10	813	555	279	62	222	7
9	3.30	40.39	76.38	0.53	0.057 61	0.009 92	0.271 95	0.046 93	0.036 28	0.001 74	522	385	244	37	230	11
10	2.53	37.89	70.44	0.54	0.045 11	0.024 90	0.200 12	0.105 62	0.035 62	0.001 49	error		185	90	226	9
11	5.08	75.20	112.25	0.67	0.077 90	0.009 24	0.371 45	0.040 78	0.034 65	0.000 75	1 144	238	321	30	220	5
12	2.72	39.55	74.75	0.53	0.056 49	0.008 99	0.259 20	0.038 50	0.034 97	0.000 71	472	357	234	31	222	4
13	4.50	53.27	99.42	0.54	0.075 06	0.018 35	0.350 73	0.072 36	0.036 28	0.001 22	1 070	508	305	54	230	8
14	4.94	95.59	99.76	0.96	0.056 89	0.011 23	0.275 08	0.057 38	0.034 74	0.000 92	487	385	247	46	220	6
15	4.60	70.66	122.96	0.57	0.069 80	0.006 55	0.339 91	0.033 27	0.035 23	0.000 70	924	194	297	25	223	4
16	3.82	54.76	92.72	0.59	0.073 53	0.006 74	0.363 51	0.037 99	0.035 51	0.000 87	1 028	187	315	28	225	5
17	3.24	46.65	87.32	0.53	0.098 73	0.027 09	0.463 44	0.128 43	0.034 01	0.000 78	2 000	532	387	89	216	5
18	4.06	79.94	78.30	1.02	0.054 11	0.005 14	0.263 08	0.025 06	0.035 40	0.001 04	376	215	237	20	224	7
19	2.09	30.62	54.76	0.56	0.093 52	0.018 24	0.441 56	0.081 12	0.035 45	0.001 06	1 498	376	371	57	225	7
20	2.31	30.43	55.24	0.55	0.045 45	0.009 75	0.215 05	0.045 73	0.035 24	0.000 96	error		198	38	223	6
21	4.52	51.36	97.92	0.52	0.087 46	0.011 91	0.408 88	0.050 33	0.034 88	0.000 86	1 372	265	348	36	221	5

样号	w_B/%														K₂O/Na₂O	A/CNK	Mg^#	σ
样号	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	LOI	total	K₂O+Na₂O	K₂O/Na₂O	A/CNK	Mg^#	σ
GXW2016029	68.46	0.55	15.74	1.43	1.68	0.07	0.80	1.58	4.52	4.78	0.17	1.21	99.78	9.30	1.06	1.02	32.44	3.40
GXW2016084	69.44	0.58	16.10	1.99	0.81	0.04	0.72	0.97	4.78	4.29	0.17	2.01	99.88	9.06	0.90	1.13	32.94	3.11
GXW2016085	68.89	0.54	16.17	1.20	1.41	0.05	0.75	1.63	4.58	4.45	0.16	1.49	99.84	9.02	0.97	1.06	34.97	3.15
GXW2016086	69.96	0.58	16.26	2.32	0.62	0.03	0.60	0.32	4.37	4.75	0.09	2.61	99.91	9.13	1.09	1.26	28.37	3.09
GXW2016087	70.38	0.55	16.19	1.65	0.74	0.03	0.60	0.25	3.70	5.69	0.10	2.17	99.89	9.39	1.54	1.27	32.45	3.22
样号	w_B/10^-6
样号	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Sr	Rb	Ba	Th
GXW2016029	38.90	79.60	9.37	35.00	6.14	1.51	5.33	0.89	4.49	0.89	2.58	0.41	2.51	0.35	341.00	118.00	1014.00	10.10
GXW2016084	42.40	69.20	9.25	34.80	6.44	1.46	5.34	0.93	4.58	0.84	2.32	0.40	2.70	0.34	378.00	114.00	947.00	9.32
GXW2016085	54.00	85.20	12.50	46.20	8.14	2.03	6.85	1.16	5.77	1.07	3.02	0.49	2.91	0.40	325.00	112.00	875.00	9.60
GXW2016086	69.60	89.00	13.20	46.50	6.73	1.52	4.94	0.80	3.46	0.58	1.63	0.25	1.68	0.24	259.00	136.00	957.00	7.12
GXW2016087	46.30	92.90	11.50	38.30	6.14	1.46	4.71	0.65	2.98	0.47	1.29	0.21	1.44	0.21	231.00	180.00	998.00	8.55
样号	w_B/10^-6																Rb/Sr	LREE/ HREE
样号	Nb	Zr	Cs	Ga	Hf	Sc	Cr	V	Ni	U	Y	Ta	∑REE	LREE	HREE	Zr+Nb+ Ce+Y	Rb/Sr	LREE/ HREE
GXW2016029	12.90	30.10	2.34	17.90	4.95	4.95	5.37	36.80	6.51	1.55	21.50	0.82	187.98	170.52	17.46	144.10	0.35	9.77
GXW2016084	15.00	65.20	3.13	19.80	3.14	6.96	66.00	41.60	4.91	3.00	25.20	0.91	180.99	163.55	17.44	174.60	0.30	9.38
GXW2016085	16.70	63.80	1.97	18.20	3.14	6.60	54.30	41.50	6.36	2.47	31.50	0.95	229.74	208.07	21.67	197.20	0.34	9.60
GXW2016086	14.60	57.10	5.24	18.10	2.85	6.84	7.59	39.10	2.87	2.20	15.00	0.96	240.13	226.55	13.58	175.70	0.53	16.68
GXW2016087	16.10	60.30	5.00	18.30	2.89	6.97	9.70	36.10	4.41	2.39	12.10	0.95	208.56	196.60	11.96	181.40	0.78	16.44
样号	Eu/Eu^*		(La/Yb)_N		(Gd/Yb)_N		10 000×Ga/Al		Sr/Y
GXW2016029	0.79		10.45		1.71		2.15		15.86
GXW2016084	0.74		10.59		1.60		2.32		15.00
GXW2016085	0.81		12.51		1.90		2.13		10.32
GXW2016086	0.77		27.93		2.37		2.10		17.27
GXW2016087	0.80		21.68		2.64		2.13		19.09

样号	w_B/%														K₂O/Na₂O	A/CNK	Mg^#	σ
样号	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	LOI	total	K₂O+Na₂O	K₂O/Na₂O	A/CNK	Mg^#	σ
GXW2016029	68.46	0.55	15.74	1.43	1.68	0.07	0.80	1.58	4.52	4.78	0.17	1.21	99.78	9.30	1.06	1.02	32.44	3.40
GXW2016084	69.44	0.58	16.10	1.99	0.81	0.04	0.72	0.97	4.78	4.29	0.17	2.01	99.88	9.06	0.90	1.13	32.94	3.11
GXW2016085	68.89	0.54	16.17	1.20	1.41	0.05	0.75	1.63	4.58	4.45	0.16	1.49	99.84	9.02	0.97	1.06	34.97	3.15
GXW2016086	69.96	0.58	16.26	2.32	0.62	0.03	0.60	0.32	4.37	4.75	0.09	2.61	99.91	9.13	1.09	1.26	28.37	3.09
GXW2016087	70.38	0.55	16.19	1.65	0.74	0.03	0.60	0.25	3.70	5.69	0.10	2.17	99.89	9.39	1.54	1.27	32.45	3.22
样号	w_B/10^-6
样号	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Sr	Rb	Ba	Th
GXW2016029	38.90	79.60	9.37	35.00	6.14	1.51	5.33	0.89	4.49	0.89	2.58	0.41	2.51	0.35	341.00	118.00	1014.00	10.10
GXW2016084	42.40	69.20	9.25	34.80	6.44	1.46	5.34	0.93	4.58	0.84	2.32	0.40	2.70	0.34	378.00	114.00	947.00	9.32
GXW2016085	54.00	85.20	12.50	46.20	8.14	2.03	6.85	1.16	5.77	1.07	3.02	0.49	2.91	0.40	325.00	112.00	875.00	9.60
GXW2016086	69.60	89.00	13.20	46.50	6.73	1.52	4.94	0.80	3.46	0.58	1.63	0.25	1.68	0.24	259.00	136.00	957.00	7.12
GXW2016087	46.30	92.90	11.50	38.30	6.14	1.46	4.71	0.65	2.98	0.47	1.29	0.21	1.44	0.21	231.00	180.00	998.00	8.55
样号	w_B/10^-6																Rb/Sr	LREE/ HREE
样号	Nb	Zr	Cs	Ga	Hf	Sc	Cr	V	Ni	U	Y	Ta	∑REE	LREE	HREE	Zr+Nb+ Ce+Y	Rb/Sr	LREE/ HREE
GXW2016029	12.90	30.10	2.34	17.90	4.95	4.95	5.37	36.80	6.51	1.55	21.50	0.82	187.98	170.52	17.46	144.10	0.35	9.77
GXW2016084	15.00	65.20	3.13	19.80	3.14	6.96	66.00	41.60	4.91	3.00	25.20	0.91	180.99	163.55	17.44	174.60	0.30	9.38
GXW2016085	16.70	63.80	1.97	18.20	3.14	6.60	54.30	41.50	6.36	2.47	31.50	0.95	229.74	208.07	21.67	197.20	0.34	9.60
GXW2016086	14.60	57.10	5.24	18.10	2.85	6.84	7.59	39.10	2.87	2.20	15.00	0.96	240.13	226.55	13.58	175.70	0.53	16.68
GXW2016087	16.10	60.30	5.00	18.30	2.89	6.97	9.70	36.10	4.41	2.39	12.10	0.95	208.56	196.60	11.96	181.40	0.78	16.44
样号	Eu/Eu^*		(La/Yb)_N		(Gd/Yb)_N		10 000×Ga/Al		Sr/Y
GXW2016029	0.79		10.45		1.71		2.15		15.86
GXW2016084	0.74		10.59		1.60		2.32		15.00
GXW2016085	0.81		12.51		1.90		2.13		10.32
GXW2016086	0.77		27.93		2.37		2.10		17.27
GXW2016087	0.80		21.68		2.64		2.13		19.09