滇西六合正长斑岩和花岗岩包体中锆石U-Pb年代和微量元素地球化学研究

doi:10.13745/j.esf.sf.2020.4.44

地学前缘 ›› 2020, Vol. 27 ›› Issue (3): 154-167.DOI: 10.13745/j.esf.sf.2020.4.44

滇西六合正长斑岩和花岗岩包体中锆石U-Pb年代和微量元素地球化学研究

段文晶¹(), 赵甫峰¹^,^*(), 任科法¹, 刘显凡¹, 邓江红¹, 杨蜜蜜¹, 楚亚婷²

1.自然资源部构造成矿成藏重点实验室, 成都理工大学地球科学学院, 四川成都 610059
2.中节能建设工程设计院有限公司, 四川成都 610059

收稿日期:2018-11-08 修回日期:2019-04-06 出版日期:2020-05-20 发布日期:2020-05-20
通信作者: 赵甫峰
作者简介:段文晶(1993—),女,硕士研究生,矿物学、岩石学、矿床学专业。E-mail: jing199343@163.com
基金资助:
国家自然科学基金项目(41403025);四川省教育厅自然科学重点项目(17ZB0052);四川省教育厅自然科学重点项目(18ZA0056)

Zircon U-Pb dating and trace element geochemistry in syenite porphyry and granite xenoliths from Liuhe, western Yunnan, China

DUAN Wenjing¹(), ZHAO Fufeng¹^,^*(), REN Kefa¹, LIU Xianfan¹, DENG Jianghong¹, YANG Mimi¹, CHU Yating²

1. Key Laboratory of Tectonic Controls on Mineralization and Hydrocarbon Accumulation, Ministry of Natural Resources; College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
2. CECEP Construction Engineering Design Institute Limited Company, Chengdu 610059, China

Received:2018-11-08 Revised:2019-04-06 Online:2020-05-20 Published:2020-05-20
Contact: ZHAO Fufeng

摘要/Abstract

摘要：

六合正长斑岩是滇西新生代富碱斑岩的典型代表,以发育各类深浅不一的岩石包体而闻名,其中包括了同期的花岗岩包体;主岩和包体所蕴含的深部地质过程对于富碱岩浆的形成和演化具有重要约束作用。本文以六合正长斑岩和其中花岗岩包体的锆石微量元素地球化学为研究重点,结合主岩主量元素、锆石U-Pb年龄、Ti温度、锆石氧逸度的对比研究,分析和探讨富碱岩浆的形成和演化过程。研究表明:锆石U-Pb年龄所限定的六合富碱岩浆活动时限为(37.89±0.96)~(35.87±0.58) Ma;而花岗岩包体代表的同期富硅酸性岩浆活动时限为(38.21±0.44)~(36.21±0.36) Ma;两者几乎同步活动。锆石微量元素成因判别图显示主岩锆石主要位于钾镁煌斑岩范围,暗示富碱岩浆源区具地幔属性;花岗岩包体锆石大多位于花岗岩范围,两者在花岗岩范围有部分重叠,证实了主岩锆石和花岗岩包体锆石结晶时存在共同的生长环境。Ce^(Ⅳ)/Ce^(Ⅲ)比值估算和Ti温度计算显示,在36.42~36.41 Ma范围内富碱岩浆氧逸度和锆石结晶温度发生突变,指示在该时限内富碱岩浆及所裹挟的花岗质岩浆发生了混合作用;氧逸度的振荡降低反映了后期幔源岩浆的补充。综合研究认为,六合地区来自富集地幔的喜山期富碱岩浆底侵熔化上覆深部地壳长英质岩石形成花岗质岩浆,随即以富碱岩浆为主与少量花岗质岩浆不均一混合并同步结晶成岩形成含有花岗岩包体的正长斑岩。

关键词: 六合正长斑岩, 锆石U-Pb年代, 微量元素地球化学, 壳幔岩浆混合, 深部地质过程

Abstract:

The Liuhe syenite porphyry is a typical representative of the Cenozoic alkali-rich porphyry in western Yunnan. It is famous for various xenoliths developed at different depths, including granite xenoliths of the same period. The deep geological processes represented by these xenoliths have important constraints on the formation and evolution of alkali-rich magma. In this paper, we focused on zircon trace element analyses, and combined with the studies on syenite porphyry main elements, zircon U-Pb dating, Ti thermometer and zircon oxygen fugacity of the Liuhe syenite porphyry and its granite xenoliths to explore the formation and evolution process of alkali-rich magma. The zircon U-Pb dating results suggested that the activity time of Liuhe alkali-rich magma is 37.89±0.96 to 35.87±0.58 Ma, almost synchronous with that of granite inclusions representing the same period of silicon-rich acidic magma at 38.21±0.44 to 36.21±0.36 Ma. The zircon trace element diagram showed that zircons from syenite porphyry mainly overlapped with the potassium-magnesium lamprophyre range, suggesting that alkali-rich magma source has mantle properties; whereas zircons from granite xenoliths overlapped in part with the granite range. The overlapping part confirmed a common growth environment during syenite porphyry and granite xenoliths zircon crystallization. The estimated Ce^(Ⅳ)/Ce^(Ⅲ) ratio and Ti temperature calculations showed that oxygen fugacity of the alkali-rich magma and zircon crystallization temperature changed greatly between 36.42 and 36.41 Ma, indicating the effect of mixing alkali-rich and entrapped granitic magma; while decreasing oxygen fugacity oscillation reflects magma supplement from a later mantle source. In summary, we speculate that the Himalayan alkali-rich magma from enriched mantle source in the Liuhe area underplates and melts the overlying felsic rocks to form granitic magma, and a small amount of which mix with alkali-rich magma to form syenite porphyry.

Key words: syenite porphyry from Liuhe, zircon U-Pb dating, trace element geochemistry, crust-mantle magma mixing, deep geological process

中图分类号:

段文晶, 赵甫峰, 任科法, 刘显凡, 邓江红, 杨蜜蜜, 楚亚婷. 滇西六合正长斑岩和花岗岩包体中锆石U-Pb年代和微量元素地球化学研究[J]. 地学前缘, 2020, 27(3): 154-167.

DUAN Wenjing, ZHAO Fufeng, REN Kefa, LIU Xianfan, DENG Jianghong, YANG Mimi, CHU Yating. Zircon U-Pb dating and trace element geochemistry in syenite porphyry and granite xenoliths from Liuhe, western Yunnan, China[J]. Earth Science Frontiers, 2020, 27(3): 154-167.

图/表 13

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序号	编号	岩石名称	w_B/%																	K₂O/ Na₂O	Mg^#
序号	编号	岩石名称	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	SO₃	H₂O^+/-	Loss	总量	Na₂O+ K₂O	TFeO	K₂O/ Na₂O	Mg^#
1	LH08	正长斑岩	61.30	0.74	14.44	5.16	2.17	0.09	2.69	4.04	3.71	6.40	0.44	0.01	1.11	0.92	101.38	10.11	6.81	1.73	0.69
2	HL-81	正长斑岩	58.00	0.62	16.40	2.59	2.01	0.10	2.20	4.50	3.53	5.30	0.37			1.77	97.40	8.83	4.34	1.50	0.66
3	LH13	花岗岩包体	72.00	0.11	15.44	1.67	1.00	0.03	0.29	1.06	5.87	2.99	0.04	<0.01	0.72	0.38	100.84	8.86	2.50	0.51	0.34
4	LH14	花岗岩包体	70.78	0.08	15.66	1.26	0.65	0.02	0.18	0.92	5.50	4.32	0.02	<0.01	0.54	0.32	99.61	9.82	1.78	0.79	0.33

序号	编号	岩石名称	w_B/%																	K₂O/ Na₂O	Mg^#
序号	编号	岩石名称	SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MnO	MgO	CaO	Na₂O	K₂O	P₂O₅	SO₃	H₂O^+/-	Loss	总量	Na₂O+ K₂O	TFeO	K₂O/ Na₂O	Mg^#
1	LH08	正长斑岩	61.30	0.74	14.44	5.16	2.17	0.09	2.69	4.04	3.71	6.40	0.44	0.01	1.11	0.92	101.38	10.11	6.81	1.73	0.69
2	HL-81	正长斑岩	58.00	0.62	16.40	2.59	2.01	0.10	2.20	4.50	3.53	5.30	0.37			1.77	97.40	8.83	4.34	1.50	0.66
3	LH13	花岗岩包体	72.00	0.11	15.44	1.67	1.00	0.03	0.29	1.06	5.87	2.99	0.04	<0.01	0.72	0.38	100.84	8.86	2.50	0.51	0.34
4	LH14	花岗岩包体	70.78	0.08	15.66	1.26	0.65	0.02	0.18	0.92	5.50	4.32	0.02	<0.01	0.54	0.32	99.61	9.82	1.78	0.79	0.33

测点	w_B/10^-6		Th/U	同位素比值				年龄/Ma		测点		w_B/10^-6				Th/U		同位素比值								年龄/Ma
测点	Th	U	Th/U	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	测点		Th		U		Th/U		²⁰⁷Pb/ ²³⁵U		1σ		²⁰⁶Pb/ ²³⁸U		1σ		²⁰⁶Pb/ ²³⁸U		1σ
Z1	3.66	222.5	0.02	0.032 2	0.003 8	0.005 3	0.000 2	34.23	1.22	B1	2 621.30		12 066.87		0.22		0.037 2		0.001 1		0.005 3		0.000 1		33.81		0.32
Z2	21.85	87.14	0.25	0.034 4	0.004 7	0.005 3	0.000 2	34.23	1.48	B1	2 621.30		12 066.87		0.22		0.037 2		0.001 1		0.005 3		0.000 1		33.81		0.32
Z2	21.85	87.14	0.25	0.034 4	0.004 7	0.005 3	0.000 2	34.23	1.48	B2	189.51		2 585.99		0.07		0.038 1		0.001 7		0.005 5		0.000 1		35.23		0.42
Z3	3.64	207.13	0.02	0.034 3	0.003 5	0.005 3	0.000 2	34.29	1	B2	189.51		2 585.99		0.07		0.038 1		0.001 7		0.005 5		0.000 1		35.23		0.42
Z3	3.64	207.13	0.02	0.034 3	0.003 5	0.005 3	0.000 2	34.29	1	B3	0.22		40.74		0.01		0.036 1		0.004 4		0.005 5		0.000 3		35.45		1.98
Z4	1 469.58	806.09	1.82	0.035 6	0.002 3	0.005 5	0.000 1	35.63	0.63	B3	0.22		40.74		0.01		0.036 1		0.004 4		0.005 5		0.000 3		35.45		1.98
Z4	1 469.58	806.09	1.82	0.035 6	0.002 3	0.005 5	0.000 1	35.63	0.63	B4	12.21		277.81		0.04		0.036 0		0.003 9		0.005 6		0.000 2		35.86		1.01
Z5	0.24	151.14	0.002	0.036 1	0.004 6	0.005 6	0.000 2	35.69	1.14	B4	12.21		277.81		0.04		0.036 0		0.003 9		0.005 6		0.000 2		35.86		1.01
Z5	0.24	151.14	0.002	0.036 1	0.004 6	0.005 6	0.000 2	35.69	1.14	B5	2.08		164.93		0.01		0.037 3		0.004 8		0.005 6		0.000 2		35.98		1.2
Z6	47.1	334.28	0.14	0.039 5	0.004 3	0.005 6	0.000 2	35.8	1.02	B5	2.08		164.93		0.01		0.037 3		0.004 8		0.005 6		0.000 2		35.98		1.2
Z7	43.24	318.83	0.14	0.033 9	0.003 6	0.005 7	0.000 2	36.42	1.06	B6	2 836.12		1 463.09		1.94		0.036 5		0.002 0		0.005 6		0.000 1		36.14		0.56
Z8	0.41	42.25	0.01	0.040 0	0.007 2	0.005 7	0.000 3	36.45	1.82	B6	2 836.12		1 463.09		1.94		0.036 5		0.002 0		0.005 6		0.000 1		36.14		0.56
Z8	0.41	42.25	0.01	0.040 0	0.007 2	0.005 7	0.000 3	36.45	1.82	B7	1 238.36		3 418.96		0.36		0.036 9		0.002 3		0.005 6		0.000 1		36.18		0.42
Z9	28.43	65.4	0.43	0.030 8	0.010 8	0.005 7	0.000 3	36.47	1.98	B7	1 238.36		3 418.96		0.36		0.036 9		0.002 3		0.005 6		0.000 1		36.18		0.42
Z9	28.43	65.4	0.43	0.030 8	0.010 8	0.005 7	0.000 3	36.47	1.98	B8	1 636.78		7 033.89		0.23		0.037 3		0.002 8		0.005 7		0.000 1		36.41		0.64
Z10	29.43	228.85	0.13	0.037 7	0.004 2	0.005 7	0.000 2	36.56	1.21	B8	1 636.78		7 033.89		0.23		0.037 3		0.002 8		0.005 7		0.000 1		36.41		0.64
Z10	29.43	228.85	0.13	0.037 7	0.004 2	0.005 7	0.000 2	36.56	1.21	B9	3 254.38		2 303.91		1.41		0.040 6		0.001 8		0.005 7		0.000 1		36.71		0.42
Z11	63.48	638.7	0.1	0.038 3	0.002 7	0.005 7	0.000 1	36.81	0.67	B9	3 254.38		2 303.91		1.41		0.040 6		0.001 8		0.005 7		0.000 1		36.71		0.42
Z11	63.48	638.7	0.1	0.038 3	0.002 7	0.005 7	0.000 1	36.81	0.67	B10	1.64		149.96		0.01		0.036 9		0.004 3		0.005 7		0.000 2		36.85		1.09
Z12	23.14	336.21	0.07	0.038 7	0.003 9	0.005 7	0.000 2	36.91	1.09	B10	1.64		149.96		0.01		0.036 9		0.004 3		0.005 7		0.000 2		36.85		1.09
Z13	13.3	304.18	0.04	0.039 1	0.003 6	0.005 8	0.000 1	37.04	0.89	B11	1 068.41		1 107.51		0.96		0.036 8		0.002 0		0.005 7		0.000 1		36.93		0.49
Z14	2.31	97.93	0.02	0.045 6	0.010 2	0.005 8	0.000 3	37.56	1.69	B11	1 068.41		1 107.51		0.96		0.036 8		0.002 0		0.005 7		0.000 1		36.93		0.49
Z14	2.31	97.93	0.02	0.045 6	0.010 2	0.005 8	0.000 3	37.56	1.69	B12	1 328.96		985.51		1.35		0.038 9		0.002 6		0.005 9		0.000 1		37.63		0.62
Z15	13.47	231.1	0.06	0.041 1	0.006 1	0.005 9	0.000 2	38.17	1.25	B12	1 328.96		985.51		1.35		0.038 9		0.002 6		0.005 9		0.000 1		37.63		0.62
Z15	13.47	231.1	0.06	0.041 1	0.006 1	0.005 9	0.000 2	38.17	1.25	B13	57.28		2 433.86		0.02		0.038 1		0.002 1		0.005 9		0.000 1		37.81		0.47
Z16	29.35	215.53	0.14	0.039 9	0.008 8	0.005 9	0.000 2	38.19	1.24	B13	57.28		2 433.86		0.02		0.038 1		0.002 1		0.005 9		0.000 1		37.81		0.47
Z16	29.35	215.53	0.14	0.039 9	0.008 8	0.005 9	0.000 2	38.19	1.24	B14	2 500.34		2 186.49		1.14		0.042 1		0.001 8		0.006 0		0.000 1		38.28		0.44
Z17	7	67.46	0.1	0.040 4	0.005 4	0.006 0	0.000 3	38.39	1.73	B14	2 500.34		2 186.49		1.14		0.042 1		0.001 8		0.006 0		0.000 1		38.28		0.44
Z17	7	67.46	0.1	0.040 4	0.005 4	0.006 0	0.000 3	38.39	1.73	B15	156.49		1 432.92		0.11		0.044 7		0.001 5		0.006 0		0.000 1		38.58		0.36
Z18	4.01	304	0.01	0.037 6	0.004 0	0.006 0	0.000 2	38.61	1.06	B15	156.49		1 432.92		0.11		0.044 7		0.001 5		0.006 0		0.000 1		38.58		0.36

测点	w_B/10^-6		Th/U	同位素比值				年龄/Ma		测点		w_B/10^-6				Th/U		同位素比值								年龄/Ma
测点	Th	U	Th/U	²⁰⁷Pb/ ²³⁵U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	²⁰⁶Pb/ ²³⁸U	1σ	测点		Th		U		Th/U		²⁰⁷Pb/ ²³⁵U		1σ		²⁰⁶Pb/ ²³⁸U		1σ		²⁰⁶Pb/ ²³⁸U		1σ
Z1	3.66	222.5	0.02	0.032 2	0.003 8	0.005 3	0.000 2	34.23	1.22	B1	2 621.30		12 066.87		0.22		0.037 2		0.001 1		0.005 3		0.000 1		33.81		0.32
Z2	21.85	87.14	0.25	0.034 4	0.004 7	0.005 3	0.000 2	34.23	1.48	B1	2 621.30		12 066.87		0.22		0.037 2		0.001 1		0.005 3		0.000 1		33.81		0.32
Z2	21.85	87.14	0.25	0.034 4	0.004 7	0.005 3	0.000 2	34.23	1.48	B2	189.51		2 585.99		0.07		0.038 1		0.001 7		0.005 5		0.000 1		35.23		0.42
Z3	3.64	207.13	0.02	0.034 3	0.003 5	0.005 3	0.000 2	34.29	1	B2	189.51		2 585.99		0.07		0.038 1		0.001 7		0.005 5		0.000 1		35.23		0.42
Z3	3.64	207.13	0.02	0.034 3	0.003 5	0.005 3	0.000 2	34.29	1	B3	0.22		40.74		0.01		0.036 1		0.004 4		0.005 5		0.000 3		35.45		1.98
Z4	1 469.58	806.09	1.82	0.035 6	0.002 3	0.005 5	0.000 1	35.63	0.63	B3	0.22		40.74		0.01		0.036 1		0.004 4		0.005 5		0.000 3		35.45		1.98
Z4	1 469.58	806.09	1.82	0.035 6	0.002 3	0.005 5	0.000 1	35.63	0.63	B4	12.21		277.81		0.04		0.036 0		0.003 9		0.005 6		0.000 2		35.86		1.01
Z5	0.24	151.14	0.002	0.036 1	0.004 6	0.005 6	0.000 2	35.69	1.14	B4	12.21		277.81		0.04		0.036 0		0.003 9		0.005 6		0.000 2		35.86		1.01
Z5	0.24	151.14	0.002	0.036 1	0.004 6	0.005 6	0.000 2	35.69	1.14	B5	2.08		164.93		0.01		0.037 3		0.004 8		0.005 6		0.000 2		35.98		1.2
Z6	47.1	334.28	0.14	0.039 5	0.004 3	0.005 6	0.000 2	35.8	1.02	B5	2.08		164.93		0.01		0.037 3		0.004 8		0.005 6		0.000 2		35.98		1.2
Z7	43.24	318.83	0.14	0.033 9	0.003 6	0.005 7	0.000 2	36.42	1.06	B6	2 836.12		1 463.09		1.94		0.036 5		0.002 0		0.005 6		0.000 1		36.14		0.56
Z8	0.41	42.25	0.01	0.040 0	0.007 2	0.005 7	0.000 3	36.45	1.82	B6	2 836.12		1 463.09		1.94		0.036 5		0.002 0		0.005 6		0.000 1		36.14		0.56
Z8	0.41	42.25	0.01	0.040 0	0.007 2	0.005 7	0.000 3	36.45	1.82	B7	1 238.36		3 418.96		0.36		0.036 9		0.002 3		0.005 6		0.000 1		36.18		0.42
Z9	28.43	65.4	0.43	0.030 8	0.010 8	0.005 7	0.000 3	36.47	1.98	B7	1 238.36		3 418.96		0.36		0.036 9		0.002 3		0.005 6		0.000 1		36.18		0.42
Z9	28.43	65.4	0.43	0.030 8	0.010 8	0.005 7	0.000 3	36.47	1.98	B8	1 636.78		7 033.89		0.23		0.037 3		0.002 8		0.005 7		0.000 1		36.41		0.64
Z10	29.43	228.85	0.13	0.037 7	0.004 2	0.005 7	0.000 2	36.56	1.21	B8	1 636.78		7 033.89		0.23		0.037 3		0.002 8		0.005 7		0.000 1		36.41		0.64
Z10	29.43	228.85	0.13	0.037 7	0.004 2	0.005 7	0.000 2	36.56	1.21	B9	3 254.38		2 303.91		1.41		0.040 6		0.001 8		0.005 7		0.000 1		36.71		0.42
Z11	63.48	638.7	0.1	0.038 3	0.002 7	0.005 7	0.000 1	36.81	0.67	B9	3 254.38		2 303.91		1.41		0.040 6		0.001 8		0.005 7		0.000 1		36.71		0.42
Z11	63.48	638.7	0.1	0.038 3	0.002 7	0.005 7	0.000 1	36.81	0.67	B10	1.64		149.96		0.01		0.036 9		0.004 3		0.005 7		0.000 2		36.85		1.09
Z12	23.14	336.21	0.07	0.038 7	0.003 9	0.005 7	0.000 2	36.91	1.09	B10	1.64		149.96		0.01		0.036 9		0.004 3		0.005 7		0.000 2		36.85		1.09
Z13	13.3	304.18	0.04	0.039 1	0.003 6	0.005 8	0.000 1	37.04	0.89	B11	1 068.41		1 107.51		0.96		0.036 8		0.002 0		0.005 7		0.000 1		36.93		0.49
Z14	2.31	97.93	0.02	0.045 6	0.010 2	0.005 8	0.000 3	37.56	1.69	B11	1 068.41		1 107.51		0.96		0.036 8		0.002 0		0.005 7		0.000 1		36.93		0.49
Z14	2.31	97.93	0.02	0.045 6	0.010 2	0.005 8	0.000 3	37.56	1.69	B12	1 328.96		985.51		1.35		0.038 9		0.002 6		0.005 9		0.000 1		37.63		0.62
Z15	13.47	231.1	0.06	0.041 1	0.006 1	0.005 9	0.000 2	38.17	1.25	B12	1 328.96		985.51		1.35		0.038 9		0.002 6		0.005 9		0.000 1		37.63		0.62
Z15	13.47	231.1	0.06	0.041 1	0.006 1	0.005 9	0.000 2	38.17	1.25	B13	57.28		2 433.86		0.02		0.038 1		0.002 1		0.005 9		0.000 1		37.81		0.47
Z16	29.35	215.53	0.14	0.039 9	0.008 8	0.005 9	0.000 2	38.19	1.24	B13	57.28		2 433.86		0.02		0.038 1		0.002 1		0.005 9		0.000 1		37.81		0.47
Z16	29.35	215.53	0.14	0.039 9	0.008 8	0.005 9	0.000 2	38.19	1.24	B14	2 500.34		2 186.49		1.14		0.042 1		0.001 8		0.006 0		0.000 1		38.28		0.44
Z17	7	67.46	0.1	0.040 4	0.005 4	0.006 0	0.000 3	38.39	1.73	B14	2 500.34		2 186.49		1.14		0.042 1		0.001 8		0.006 0		0.000 1		38.28		0.44
Z17	7	67.46	0.1	0.040 4	0.005 4	0.006 0	0.000 3	38.39	1.73	B15	156.49		1 432.92		0.11		0.044 7		0.001 5		0.006 0		0.000 1		38.58		0.36
Z18	4.01	304	0.01	0.037 6	0.004 0	0.006 0	0.000 2	38.61	1.06	B15	156.49		1 432.92		0.11		0.044 7		0.001 5		0.006 0		0.000 1		38.58		0.36

序号	w_B/10^-6			LREE/ HREE	δCe	δEu	序号	w_B/10^-6			LREE/ HREE	δCe	δEu
序号	LREE	HREE	∑REE	LREE/ HREE	δCe	δEu	序号	LREE	HREE	∑REE	LREE/ HREE	δCe	δEu
Z1	2.62	60.69	63.3	0.04	37.34	0.69	B1	81.61	2 034.79	2 116.4	0.04	6.89	0.7
Z2	11.35	55.91	67.3	0.2	13.17	0.63	B2	6.55	1 089.66	1 096.2	0.01	29.59	0.45
Z3	2.01	118.09	120.1	0.02	23.18	0.59	B3	0.25	310.03	310.3	0	3.77	0.47
Z4	76.02	536.08	612.1	0.14	10.66	0.74	B4	4.08	70.45	74.5	0.06	69.88	0.67
Z5	0.32	22.17	22.5	0.01	4.63	0.3	B5	2.22	40.16	42.4	0.06	13.09	0.74
Z6	15.54	316.98	332.5	0.05	14.24	0.71	B6	156.28	1 255.35	1 411.6	0.12	34.64	0.73
Z7	13.85	326.58	340.4	0.04	41.37	0.82	B7	70.86	1 010.15	1 081.0	0.07	25.85	0.68
Z8	0.31	26.78	27.1	0.01	12.61	0.36	B8	79.49	1 700.89	1 780.4	0.05	22.2	0.59
Z9	8.4	80.57	89	0.1	53.92	0.65	B9	475.67	2 279.87	2 755.5	0.21	94.21	0.64
Z10	5.18	100.13	105.3	0.05	19.84	0.47	B10	1.55	17.91	19.5	0.09	13.98	0.86
Z11	10.2	585.03	595.2	0.02	9.64	0.52	B11	74.43	934.59	1 009.0	0.08	48.43	0.73
Z12	4.16	220.4	224.6	0.02	41.03	0.51	B12	77.66	674.78	752.4	0.12	36.09	0.73
Z13	3.94	144.89	148.8	0.03	23.97	0.61	B13	5.2	1 942.65	1 947.9	0	52.53	0.49
Z14	0.84	377.48	378.3	0	14.2	0.44	B14	83.17	963.1	1 046.3	0.09	55.5	0.69
Z15	3.24	243.21	246.4	0.01	12.59	0.53	B15	19.65	921.63	941.3	0.02	54.64	0.27
Z16	4.52	88.33	92.8	0.05	36.44	0.57
Z17	1.05	7.6	8.7	0.14	27.54	1.23
Z18	2.2	42.02	44.2	0.05	26.38	0.75

滇西六合正长斑岩和花岗岩包体中锆石U-Pb年代和微量元素地球化学研究

Zircon U-Pb dating and trace element geochemistry in syenite porphyry and granite xenoliths from Liuhe, western Yunnan, China

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测点	w(Ti)/10^-6	T/K	T/℃	年龄/Ma	Ce^(Ⅳ)/Ce^(Ⅲ)	测点	w(Ti)/10^-6	T/K	T/℃	年龄/Ma	Ce^(Ⅳ)/Ce^(Ⅲ)
Z1	3.06	959	686	34.23	18.92	B1	24.5	1 171	898	33.81	5.88
Z2	15.62	1 117	844	34.23	7.75	B2	10.62	1 075	802	35.23	23.79
Z3	2.99	957	684	34.29	18.09	B3	2.4	939	666	35.45	4.57
Z4	15.52	1 117	844	35.63	9.04	B4	7.88	1 045	772	35.86	31.13
Z5	3.87	979	706	35.69	3.91	B5	4.06	984	711	35.98	6.32
Z6	13.14	1 098	825	35.8	8.21	B6	53.45	1 276	1 003	36.14	38.23
Z7	6.6	1 028	755	36.42	21.34	B7	15.15	1 114	841	36.18	23.91
Z8	3.92	980	707	36.45	14.53	B8	4.65	996	723	36.41	21.06
Z9	4.18	986	713	36.47	39.92	B9	11.11	1 080	807	36.71	103.77
Z10	10.08	1 070	797	36.56	16.59	B10	3.01	958	685	36.85	7.38
Z11	6.2	1 022	749	36.81	8.29	B11	12.33	1 091	818	36.93	90.54
Z12	3.48	970	697	36.91	33.04	B12	32.1	1 205	932	37.63	25.32
Z13	3.38	968	695	37.04	13.78	B13	11.6	1 085	812	37.81	38.01
Z14	2.16	931	658	37.56	19.42	B14	26.45	1 180	907	38.28	52.38
Z15	2.17	932	659	38.17	19.34	B15	3.4	968	695	38.58	54.07
Z16	3.39	968	695	38.19	37
Z17	6.01	1 019	746	38.39	27.45
Z18	4.62	995	722	38.61	13.34

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