华北克拉通减薄的岩浆岩响应:来自河北武安洪山含霓石斑状正长岩的证据

doi:10.13745/j.esf.sf.2019.9.24

地学前缘 ›› 2020, Vol. 27 ›› Issue (3): 168-181.DOI: 10.13745/j.esf.sf.2019.9.24

华北克拉通减薄的岩浆岩响应:来自河北武安洪山含霓石斑状正长岩的证据

张波¹(), 苏尚国¹^,^*(), 莫宣学¹, 冯少憧¹^,², 伍月³, 蒋校⁴, 冯艳芳⁵, 刘江涛⁵

1.中国地质大学(北京) 地球科学与资源学院, 北京 100083
2.国家无线电监测中心检测中心, 北京 100041
3.中国地质调查局沈阳地质调查中心, 辽宁沈阳 110034
4.中国国土资源航空物探遥感中心, 北京 100083
5.中国地质调查局发展研究中心, 北京 100037

收稿日期:2019-08-16 修回日期:2019-10-28 出版日期:2020-05-20 发布日期:2020-05-20
通信作者: 苏尚国
作者简介:张波(1986—),男,博士研究生,矿物学、岩石学、矿床学专业。E-mail: zbotdw@163.com
基金资助:
中国地质调查局项目(12120115069701);中国地质调查局项目(DD20190429);国家自然科学基金项目(41272105);教育部博士学科点基金项目(20130022140001)

Magmatic response to lithospheric thinning of the North China Craton: evidence from porphyritic aegirite-bearing syenite in Wu'an, Hebei, China

ZHANG Bo¹(), SU Shangguo¹^,^*(), MO Xuanxue¹, FENG Shaochong¹^,², WU Yue³, JIANG Xiao⁴, FENG Yanfang⁵, LIU Jiangtao⁵

1. School of Earth Sciences and Resources, China University of Geosciences(Beijing), Beijing 100083, China
2. State Radio Monitoring Center Testing Center, Beijing 100041, China
3. Shenyang Institute of Geology and Mineral Resources, China Geological Survey, Shenyang 110034, China
4. China Aero Geophysical Survey and Remote-Sensing Center for Land Resources, Beijing 100083, China
5. Development and Research Center, China Geological Survey, Beijing 100037, China

Received:2019-08-16 Revised:2019-10-28 Online:2020-05-20 Published:2020-05-20
Contact: SU Shangguo

摘要/Abstract

摘要：

洪山碱性杂岩体出露于河北省邯郸市永年县,地处太行山南段,出露面积约53 km²,岩性以正长岩类为主体,侵位于晚古生代—中生代地层中。洪山碱性杂岩体中正长岩属于钾质的碱性系列岩石,形成于拉张环境,其形成年龄为(120.1±4.6) Ma,是华北克拉通岩浆作用峰期的产物。岩体稀土元素配分图中无Eu异常,表现为轻稀土元素富集的配分型式。富集Rb、K、Sr等大离子亲石元素,亏损Nb、Ta、Ti等高场强元素,具有大陆地壳特征。野外观察到岩石具有从深成到浅成-超浅成的特征,电子探针发现长石出现反环带,正长岩中不含继承锆石等特征,结合若要使地壳内岩石部分熔融产生无铕异常的正长质岩浆,那么压力应大于20 kbar,说明洪山碱性杂岩体形成于加厚地壳局部熔融,后经历了少量幔源岩浆混合及地幔流体的注入等过程,导致正长岩出现一定的地幔Hf、Nd同位素印记,而未改变其主微量元素特征,随后在拉张环境下快速上升至地表浅处。

关键词: 洪山, 正长岩, 地球化学, 锆石U-Pb年龄, 岩浆混合, 拉张环境

Abstract:

The Hongshan alkaline complex is located in the southern section of the Taihang Mountains, Hebei Province with an outcrop area of about 53 km². Its lithology is dominated by syenite and intruded in the Late Paleozoic-Mesozoic strata. Our study showed that the alkaline intrusive complex belongs to alkaline series, formed in an extensional environment at the age of 120.1±4.6 Ma as a product of the peak period of the North China Craton magmatism. The REE patterns showed no Eu anomaly. The complex is enriched in light rare earth and large ion lithophile elements, such as Rb, K, Sr, and depleted in high field strength elements, such as Nb, Ta and Ti, exhibiting continental crustal characteristics. We observed in the field that the rocks are characterized by deep and shallow-ultra shallow formation. We also observed through electron microprobe analysis that the feldspar has a reverse belt that contained no inherited zircon. These observations, combined with the notion that partial melting of Earth's crust is needed to produce syenitic magma without Eu abnormalities, suggested a formation pressure of greater than 20 kbar. That is, the Hongshan syenite formed by partial melting of the thickened crust with some mantle derived magma mixing and mantle fluid injection to produce its mantle Hf and Nd isotopic signatures without altering the major and trace elemental characteristics, and then rose rapidly to the Earth surface under extensional condition.

Key words: Hongshan, syenite, geochemistry, zircon U-Pb age, magma mixing, tensional tectonic background

中图分类号:

张波, 苏尚国, 莫宣学, 冯少憧, 伍月, 蒋校, 冯艳芳, 刘江涛. 华北克拉通减薄的岩浆岩响应:来自河北武安洪山含霓石斑状正长岩的证据[J]. 地学前缘, 2020, 27(3): 168-181.

ZHANG Bo, SU Shangguo, MO Xuanxue, FENG Shaochong, WU Yue, JIANG Xiao, FENG Yanfang, LIU Jiangtao. Magmatic response to lithospheric thinning of the North China Craton: evidence from porphyritic aegirite-bearing syenite in Wu'an, Hebei, China[J]. Earth Science Frontiers, 2020, 27(3): 168-181.

图/表 15

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岩石类型	矿物类型	w_B/%											An	Ab	Or
岩石类型	矿物类型	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	Total	An	Ab	Or
含霓石斑状正长岩	条纹	68.85		19				0.33	11.22			99.4	2.76	97.24	0
	长石1^#	64.75		17.66	0.12	0.02			0.5	17.36		100.41	0	2.51	97.49
	均一												1.35	48.87	49.78
	条纹	68.84		19.42	0.14			0.58	11.43	0.05		100.46	4.64	94.9	0.46
	长石2^#	63.8	0.15	17.51	0.19			0.05	0.4	17.46		99.56	0.24	2	97.76
	均一												2.39	47.47	50.14
	条纹	68.79		18.6	0.25			0.14	11.57			99.35	1.15	98.85	0
	长石3^#	64.38	0.08	17.6	0.08	0.02		0.19	0.33	17.21		99.89	0.93	1.67	97.41
	均一												1.04	49.23	49.74
	条纹	68.68		19.17				0.2	11.25	0.17		99.47	1.66	96.71	1.64
	长石4^#	63.85		17.53	0.2		0.02	0.08	0.61	16.99		99.28	0.39	3.1	96.51
	均一												1.01	48.91	50.08
	条纹	68.9	0.03	18.79	0.17			0.09	11.66	0.1		99.74	0.73	98.33	0.94
	长石5^#	64.64		17.66	0.14		0.03		0.53	17.54		100.54	0	2.63	97.37
	均一												0.36	49.47	50.18
	环带长石	65.77		19.23					6.4	8.42		99.82	0	40.45	59.55
		64.89		19.05				0.7	7.02	7.75		99.41	4.12	42.89	52.99
		67.24	0.08	20.62	0.21			1.82	10.47	0.29		100.73	13.97	83.44	2.59

岩石类型	矿物类型	w_B/%											An	Ab	Or
岩石类型	矿物类型	SiO₂	TiO₂	Al₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	Total	An	Ab	Or
含霓石斑状正长岩	条纹	68.85		19				0.33	11.22			99.4	2.76	97.24	0
	长石1^#	64.75		17.66	0.12	0.02			0.5	17.36		100.41	0	2.51	97.49
	均一												1.35	48.87	49.78
	条纹	68.84		19.42	0.14			0.58	11.43	0.05		100.46	4.64	94.9	0.46
	长石2^#	63.8	0.15	17.51	0.19			0.05	0.4	17.46		99.56	0.24	2	97.76
	均一												2.39	47.47	50.14
	条纹	68.79		18.6	0.25			0.14	11.57			99.35	1.15	98.85	0
	长石3^#	64.38	0.08	17.6	0.08	0.02		0.19	0.33	17.21		99.89	0.93	1.67	97.41
	均一												1.04	49.23	49.74
	条纹	68.68		19.17				0.2	11.25	0.17		99.47	1.66	96.71	1.64
	长石4^#	63.85		17.53	0.2		0.02	0.08	0.61	16.99		99.28	0.39	3.1	96.51
	均一												1.01	48.91	50.08
	条纹	68.9	0.03	18.79	0.17			0.09	11.66	0.1		99.74	0.73	98.33	0.94
	长石5^#	64.64		17.66	0.14		0.03		0.53	17.54		100.54	0	2.63	97.37
	均一												0.36	49.47	50.18
	环带长石	65.77		19.23					6.4	8.42		99.82	0	40.45	59.55
		64.89		19.05				0.7	7.02	7.75		99.41	4.12	42.89	52.99
		67.24	0.08	20.62	0.21			1.82	10.47	0.29		100.73	13.97	83.44	2.59

样品名称	样品编号		w_B/%
样品名称	样品编号		SiO₂		Al₂O₃			TiO₂			Fe₂O₃			FeO			CaO			MgO			K₂O		Na₂O			MnO			P₂O₅		LOI	Total
粗粒正长岩	HS-01	62.92		16.99			0.5			3.45			0.93			1.26			0.62			5.88		6.22			0.08			0.21			0.73	99.79
粗粒正长岩	HS-04	64.91		17.79			0.34			2.53			0.31			0.38			0.24			6.18		6.36			0.03			0.1			0.67	99.84
含霓石斑状正长岩	JY-01	63.29		17.31			0.4			2.77			0.86			1.43			0.86			5.71		6.21			0.09			0.17			0.68	99.78
	JY-13	62.98		17.06			0.38			2.34			1.03			1.93			1.01			5.76		6.16			0.07			0.15			0.96	99.83
	JY-14	63.65		18.08			0.42			3.06			0.14			0.67			0.41			6.03		5.96			0.07			0.18			1.11	99.78
样品名称	样品编号		w_B/10^-6
样品名称	样品编号		Li		Be			Sc			V			Cr			Co			Ni			Cu		Zn			Ga			Ge		Rb	Sr
粗粒正长岩	HS-07	39.5		7.83			12.9			151			21.8			6.8			7.51			89.2		105			24.2			1.41			139	745
粗粒正长岩	HS-10	35.6		5.35			10.8			134			26.4			3.77			7.74			282		97.2			27.6			1.28			134	346
含霓石斑状正长岩	JY-01	37.8		8.05			11.2			85.6			26.8			6.79			9.38			42.9		70.7			21.3			1.18			148	886
	JY-13	60.7		4.62			11			82.4			25.9			6.73			9.25			38.8		71.8			20.9			1.21			175	715
	JY-14	30.8		5.56			12.1			99.2			32.7			4.18			11			39.5		67.3			22.3			1.34			167	729
样品名称	样品编号		w_B/10^-6
样品名称	样品编号		Y		Zr			Nb			Mo			Cs			Ba			La			Ce		Pr			Nd			Sm		Eu	Gd
粗粒正长岩	HS-13	14.3		307			19.8			1.63			1.46			614			30			50.6		5.71			19.3			3.73			1	2.95
粗粒正长岩	HS-16	10.2		310			13			1.82			0.39			377			23.1			37.3		4.06			13.4			2.53			0.78	2.05
含霓石斑状正长岩	JY-01	13.4		225			11.5			1.45			2.75			736			25.9			42.6		4.72			16.5			3.03			0.94	2.55
	JY-13	13.7		178			10.2			8.62			3.4			685			29.9			44.6		4.74			16.2			2.98			0.91	2.54
	JY-14	10.8		224			12.3			1.97			2.58			801			24.5			43.2		4.37			15.3			2.79			0.85	2.18
样品名称	样品编号		w_B/10^-6
样品名称	样品编号		Tb		Dy			Ho			Er			Tm			Yb			Lu			Hf		Ta			W			Tl		Pb	Bi
粗粒正长岩	HS-19	0.46		2.29			0.45			1.37			0.2			1.42			0.21			6.81		1.34			2.63			0.34			50	0.13
粗粒正长岩	HS-22	0.32		1.56			0.31			0.96			0.15			1.06			0.17			6.48		0.84			2.22			0.22			14.2	0.16
含霓石斑状正长岩	JY-01	0.39		1.93			0.38			1.15			0.17			1.15			0.18			4.39		2.38			1.49			0.56			25.2	0.13
	JY-13	0.39		1.93			0.38			1.16			0.17			1.15			0.17			3.31		1.91			4.35			0.59			38.8	0.23
	JY-14	0.32		1.58			0.31			0.96			0.14			0.97			0.15			4.47		0.48			7.49			0.56			41.1	0.16
样品名称	样品编号		w_B/10^-6						Mg^#			A/CNK			w(全碱) /%			w(∑REE) /10^-6			LREE/HREE					(La/ Yb)_N			(Gd/ Yb)_N			δEu
样品名称	样品编号		Th			U			Mg^#			A/CNK			w(全碱) /%			w(∑REE) /10^-6			LREE/HREE					(La/ Yb)_N			(Gd/ Yb)_N			δEu
粗粒正长岩	HS-25		10.6			3.16			21.42			0.96			12.19			119.68			11.82					14.28			1.68			0.93
粗粒正长岩	HS-28		6.29			2.09			14.02			1.02			12.64			87.74			12.36					14.65			1.56			1.05
含霓石斑状正长岩	JY-01		7.87			2.07			31.21			0.98			12.02			101.58			11.88					15.13			1.78			1.03
	JY-13		5.48			1.69			36.47			0.94			12.04			107.22			12.59					17.48			1.78			1.01
	JY-14		8.22			1.81			20.24			1.07			12.15			97.6			13.8					17.12			1.82			1.05

样品名称	样品编号		w_B/%
样品名称	样品编号		SiO₂		Al₂O₃			TiO₂			Fe₂O₃			FeO			CaO			MgO			K₂O		Na₂O			MnO			P₂O₅		LOI	Total
粗粒正长岩	HS-01	62.92		16.99			0.5			3.45			0.93			1.26			0.62			5.88		6.22			0.08			0.21			0.73	99.79
粗粒正长岩	HS-04	64.91		17.79			0.34			2.53			0.31			0.38			0.24			6.18		6.36			0.03			0.1			0.67	99.84
含霓石斑状正长岩	JY-01	63.29		17.31			0.4			2.77			0.86			1.43			0.86			5.71		6.21			0.09			0.17			0.68	99.78
	JY-13	62.98		17.06			0.38			2.34			1.03			1.93			1.01			5.76		6.16			0.07			0.15			0.96	99.83
	JY-14	63.65		18.08			0.42			3.06			0.14			0.67			0.41			6.03		5.96			0.07			0.18			1.11	99.78
样品名称	样品编号		w_B/10^-6
样品名称	样品编号		Li		Be			Sc			V			Cr			Co			Ni			Cu		Zn			Ga			Ge		Rb	Sr
粗粒正长岩	HS-07	39.5		7.83			12.9			151			21.8			6.8			7.51			89.2		105			24.2			1.41			139	745
粗粒正长岩	HS-10	35.6		5.35			10.8			134			26.4			3.77			7.74			282		97.2			27.6			1.28			134	346
含霓石斑状正长岩	JY-01	37.8		8.05			11.2			85.6			26.8			6.79			9.38			42.9		70.7			21.3			1.18			148	886
	JY-13	60.7		4.62			11			82.4			25.9			6.73			9.25			38.8		71.8			20.9			1.21			175	715
	JY-14	30.8		5.56			12.1			99.2			32.7			4.18			11			39.5		67.3			22.3			1.34			167	729
样品名称	样品编号		w_B/10^-6
样品名称	样品编号		Y		Zr			Nb			Mo			Cs			Ba			La			Ce		Pr			Nd			Sm		Eu	Gd
粗粒正长岩	HS-13	14.3		307			19.8			1.63			1.46			614			30			50.6		5.71			19.3			3.73			1	2.95
粗粒正长岩	HS-16	10.2		310			13			1.82			0.39			377			23.1			37.3		4.06			13.4			2.53			0.78	2.05
含霓石斑状正长岩	JY-01	13.4		225			11.5			1.45			2.75			736			25.9			42.6		4.72			16.5			3.03			0.94	2.55
	JY-13	13.7		178			10.2			8.62			3.4			685			29.9			44.6		4.74			16.2			2.98			0.91	2.54
	JY-14	10.8		224			12.3			1.97			2.58			801			24.5			43.2		4.37			15.3			2.79			0.85	2.18
样品名称	样品编号		w_B/10^-6
样品名称	样品编号		Tb		Dy			Ho			Er			Tm			Yb			Lu			Hf		Ta			W			Tl		Pb	Bi
粗粒正长岩	HS-19	0.46		2.29			0.45			1.37			0.2			1.42			0.21			6.81		1.34			2.63			0.34			50	0.13
粗粒正长岩	HS-22	0.32		1.56			0.31			0.96			0.15			1.06			0.17			6.48		0.84			2.22			0.22			14.2	0.16
含霓石斑状正长岩	JY-01	0.39		1.93			0.38			1.15			0.17			1.15			0.18			4.39		2.38			1.49			0.56			25.2	0.13
	JY-13	0.39		1.93			0.38			1.16			0.17			1.15			0.17			3.31		1.91			4.35			0.59			38.8	0.23
	JY-14	0.32		1.58			0.31			0.96			0.14			0.97			0.15			4.47		0.48			7.49			0.56			41.1	0.16
样品名称	样品编号		w_B/10^-6						Mg^#			A/CNK			w(全碱) /%			w(∑REE) /10^-6			LREE/HREE					(La/ Yb)_N			(Gd/ Yb)_N			δEu
样品名称	样品编号		Th			U			Mg^#			A/CNK			w(全碱) /%			w(∑REE) /10^-6			LREE/HREE					(La/ Yb)_N			(Gd/ Yb)_N			δEu
粗粒正长岩	HS-25		10.6			3.16			21.42			0.96			12.19			119.68			11.82					14.28			1.68			0.93
粗粒正长岩	HS-28		6.29			2.09			14.02			1.02			12.64			87.74			12.36					14.65			1.56			1.05
含霓石斑状正长岩	JY-01		7.87			2.07			31.21			0.98			12.02			101.58			11.88					15.13			1.78			1.03
	JY-13		5.48			1.69			36.47			0.94			12.04			107.22			12.59					17.48			1.78			1.01
	JY-14		8.22			1.81			20.24			1.07			12.15			97.6			13.8					17.12			1.82			1.05

分析点号	w_B/10^-6		Th/U	同位素比值				年龄/Ma
分析点号	Th	U	Th/U	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ	²⁰⁷Pb/²³⁵U	1σ	²⁰⁶Pb/²³⁸U	1σ
JY2-01_02	15 843	10 127	1.52	0.235 1	0.019 1	0.019 2	0.000 3	214.4	15.7	122.5	1.7
JY2-01_03	12 715	6 775	1.92	0.138 7	0.004 5	0.018 3	0.000 2	131.9	4.0	117.0	1.3
JY2-01_04	18 789	9 821	1.93	0.137 5	0.003 1	0.017 9	0.000 2	130.8	2.8	114.5	1.0
JY2-01_05	20 921	10 958	1.88	0.144 1	0.003 9	0.018 9	0.000 2	136.7	3.5	120.6	1.6
JY2-01_06	13 218	5 572	2.42	0.167 1	0.004 7	0.020 8	0.000 3	156.9	4.1	132.7	1.7
JY2-01_07	14 445	5 974	2.32	0.139 3	0.004 1	0.019 7	0.000 3	132.4	3.7	126.0	1.6
JY2-01_10	11 684	5 363	2.18	0.131	0.004 2	0.019 6	0.000 3	125.0	3.8	125.2	1.8
JY2-01_11	12 721	7 232	1.79	0.353 5	0.009 6	0.020 9	0.000 3	307.4	7.2	133.3	1.8
JY2-01_12	12 397	8 239	1.53	0.145 2	0.004 5	0.017	0.000 2	137.7	4.0	108.8	1.1
JY2-01_14	73 653	33 306	2.21	0.151 4	0.003 7	0.018 4	0.000 2	143.2	3.3	117.6	1.0
JY2-01_16	20 673	8 438	2.46	0.145 2	0.005 8	0.017 8	0.000 2	137.6	5.2	113.6	1.1
JY2-01_17	15 343	7 840	1.95	0.255 7	0.013 5	0.018 8	0.000 3	231.2	10.9	120.3	1.8
JY2-01_18	17 952	5 566	3.23	0.214 8	0.006 2	0.020 8	0.000 3	197.5	5.2	133.0	1.6
JY2-01_19	8 022	3 731	2.11	0.131 9	0.004 1	0.020 3	0.000 2	125.8	3.7	129.4	1.2

华北克拉通减薄的岩浆岩响应:来自河北武安洪山含霓石斑状正长岩的证据

Magmatic response to lithospheric thinning of the North China Craton: evidence from porphyritic aegirite-bearing syenite in Wu'an, Hebei, China

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