Ages,Origin and Geological Implications of the Chaganaobao Granite Body in the East Ujimqin Banner,Inner Mongolia

Abstract

Abstract:

The Chaganaobao pluton in the north of the East Ujimqin Banner,Inner Mongolia can be divided into gray-yellow fine-grained granite unit and gray-yellow medium-fine-grained porphyraceous medium-fine-grained two-mica granite unit.The U-Pb weighted average age of the former is (306.4±2) Ma,which is the product of Late Carboniferous magmatic activity.The latter has a U-Pb weighted average age of (278.3±2) Ma,which is the product of Early Permian magmatic activity.The two kinds of granites have similar geochemical characteristics.The main elements are all rich in Si,but poor in Ti,Mg,Ca and have a high ratio of alkali/aluminum (NK/A),all of which show obvious negative Eu anomalies.Trace elements are enrichment of Rb,Th,U,K and are low enrichment of P,Zr,Hf,and have a strong loss of Ba,Sr,Ti.Based on the analysis and discussion,we conclude that the Late Carboniferous granite unit and the Early Permian medium-fine-grained porphyraceous granite unit are all the I-S transitional calc-alkaline granite type.The petrochemistry,rock formations,distribution and rocks sources all indicate that the late Late Carboniferous and early Permian granite body of the Chaganaobao were consistent with the product of the Late Paleozoic Central Asia orogenic tectonic setting and transformation period tectonic-magmatic event.

Key words: Chaganaobao, granite body, zircon U-Pb age, petrochemistry, tectonic setting, the East UjimqinBanner, Inner Mongolia

CLC Number:

CHENG Xinbin, WANG Wei, WEI Bo, XU Jixiang, SUN Yonghua, FANG Tongming, LIU Zhenhua, YOU Shina, LIU Hong, HE Fubing. Ages,Origin and Geological Implications of the Chaganaobao Granite Body in the East Ujimqin Banner,Inner Mongolia[J]. Geoscience, 2017, 31(03): 508-520.

Figures/Tables 16

References 32

[1]	内蒙古自治区区域地质测量队. 宝力格幅1:20万区域地质调查报告[R]. 北京: 全国地质资料馆, 1975:58-67.
[2]	内蒙古自治区地质调查研究院. 新庙幅1:25万区域地质调查报告[R]. 北京: 全国地质资料馆, 2008:62-84.
[3]	洪大卫, 黄怀曾, 肖宜君, 等. 内蒙古中部二叠纪碱性花岗岩及其地球动力学意义[J]. 地质学报, 1994, 68(3):219-230.
[4]	何付兵, 徐吉祥, 谷晓丹, 等. 内蒙古东乌珠穆沁旗阿木古楞复式花岗岩体时代、成因及地质意义[J]. 地质论评, 2013, 59(6):1150-1164.
[5]	LIU Y S, GAO S, HU Z, et al. Continental and oceanic crust recycling-induced melt-peridotite interactions in the trans-North China Orogen:U-Pb dating,Hf isotopes and trace elements in zircons from mantle xenoliths[J]. Petrology, 2010, 51:537-571.
[6]	LUDWIG K R. Users Manual for Isoplot/EX.version 2.A Geo-chronological Toolkit for Microsoft Excel[M]. Berkeley: Berkeley Geochronology Center, 2003, 4:1-71.
[7]	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, 49(8):1589-1604.
[8]	WILLIAMS I S, BUICK A, CARTWRIGHT I. An extended epi-sode of early Mesoproterozoic metamorphic fluid flow in the Reynold region,central Australia[J]. Journal of Metamorphic Geo-logy, 1996, 14(1):29-47.
[9]	刘显凡, 卢秋霞. 锆石形态标型特征及标型生长机制探讨[J]. 岩石矿物学杂志, 1997, 16(2):179-183.
[10]	史长义, 鄢明才, 迟清华. 中国花岗岩类化学元素丰度[M]. 北京: 地质出版社, 2008:75-106.
[11]	BOYNTON W V. Cosmochemistry of the rare earth elements:metcorite studies[M]// MYSEN B O, RICHET P.Developments in Geochemistry.Amsterdam:Elsevier, 1984:63-114.
[12]	SUN S S, MCDONOUGH W F. Chemical and isotopic systema-tics of oceanic basalts:implications for mantle composition and processes[J]. Geological Society,London,Special Publications, 1989, 42(1):313-345. DOI URL
[13]	肖庆辉, 邓晋福, 马大铨, 等. 花岗岩研究思维与方法[M]. 北京: 地质出版社, 2002:53-63.
[14]	TREUIL M, JORON J L. Utilisation des eléments hydromagmatophiles pour la simplification de la modélisation quantitative desprocessus magmatiques:Exemples de l’Afar et de la Dorsale Médio-Atlantique[J]. Rendiconti della Società Italiana di Mine-ralogia e Petrologia, 1975, 31:125-174.
[15]	张旗, 王焰, 熊小林, 等. 埃达克岩和花岗岩:挑战与机遇[M]. 北京: 中国大地出版社, 2008:226-253.
[16]	张建军, 王涛, 张招崇, 等. 华北地块北缘西段巴音诺尔公—狼山地区牙马图岩体的岩浆混合成因——岩相学和元素地球化学证据[J]. 地质论评, 2012, 58(1):53-66.
[17]	MARTIN H, SMITHIES R H, RAPP R, et al. An overview of adakite,tonalite-trondhjemite-granodiorite(TTG),and sanukitoid:relationships and some implications for crustal evolution[J]. Lithos, 2005, 79:1-24. DOI URL
[18]	GLAZNER A F, BARTLEY J M, COLEMAN D S, et al. Are plutons assembled over millions of years by amalgamation from small magma chambers?[J]. GSA Today, 2004, 14(4/5):4-11.
[19]	PETFORD N, GRUDEN A R, MCCAFFREY K J W, et al. Granite magma formation,transport and emplacement in the Earth’s crust[J]. Nature, 2000, 408:669-673. DOI
[20]	刘昊, 杨欣德, 郝彬, 等. 内蒙古赤峰北部晚侏罗世花岗岩地球化学特征及构造背景[J]. 地质力学学报, 2011, 17(3):286-294.
[21]	AUWERA J V, BOGAERTS M, LIEGEOIS J P, et al. Derivation of 1.0-0.9 Ga ferro potassic A type granitoids of southern Norway by extreme differentiation from basic magmas[J]. Precambrian Research, 2003, 124:107-148. DOI URL
[22]	KING P L, WHITE A J R, CHAPPELL B W, et al. Characterization and origin of aluminous A type granites from the Lachlan Fold Belt, Southeastern Australia[J]. Petrology, 1997, 38:371-391.
[23]	张万益. 内蒙古东乌珠穆沁旗岩浆活动与金属成矿作用[D]. 北京: 中国地质科学院, 2008:1-170.
[24]	沈晓丽, 张宝林, 贾文臣, 等. 蒙古国东南部巴音苏赫图晚古生代—早中生代二长花岗岩地球化学特征及其对构造环境的约束[J]. 吉林大学学报(地球科学版), 2012, 42(1):281-295.
[25]	邓晋福, FLOWER M F J, 苏尚国, 等. 地中海地区明显反差的岩石圈变形与岩浆活动的共存:陆-陆碰撞过程中地幔流的响应与表现[J]. 现代地质, 2004, 18(4):435-442.
[26]	BECHELOR R A, BOWDEN P. Petrogenetic interpretation of granitoid rock series using multicationic parameters[J]. Chemical Geology, 1985, 48:43-55. DOI URL
[27]	PEARCE J A, HARRIS N B W, TINDLE A G. Trace element discrimination diagrams for the tectonic interpretation of granitic rocks[J]. Petrology, 1984, 25:956-983.
[28]	战明国. 花岗岩类分类与定位机制研究动向和进展[J]. 中国区域地质, 1998, 17(2):182-188.
[29]	刘伟, 潘小菲, 谢烈文. 大兴安岭南段林西地区花岗岩类的源岩:地壳生长的时代和方式[J]. 岩石学报, 2007, 23(2):441-460.
[30]	佘宏全, 李进文, 向安平, 等. 大兴安岭中北段原岩锆石U-Pb测年及其与区域构造演化关系[J]. 岩石学报, 2012, 28(2):571-594.
[31]	辛后田, 滕学建, 程银行. 内蒙古东乌旗宝力高庙组地层划分及其同位素年代学研究[J]. 地质调查与研究, 2011, 34(1):1-9.
[32]	李锦轶, 高立明, 孙桂华, 等. 内蒙古东部双井子中三叠世同碰撞壳源花岗岩的确定及其对西伯利亚与中朝古板块碰撞时限的约束[J]. 岩石学报, 2007, 23(3):565-582.

样品号	测点号	元素含量			Th/U	同位素比值			年龄/Ma
样品号	测点号	²⁰⁶Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb ±1σ	²⁰⁷Pb/²³⁵U ±1σ	²⁰⁶Pb/²³⁸U ±1σ	²⁰⁷Pb/²⁰⁶Pb ±1σ	²⁰⁷Pb/²³⁵U ±1σ	²⁰⁶Pb/²³⁸U ±1σ
PM201- 71H1	1	20.36	117.03	191.75	0.61	0.052 7±0.002 8	0.354 1±0.018 3	0.048 7±0.000 4	316±103	308±14	307±3
	2	27.47	62.73	145.24	0.43	0.052 6±0.002 4	0.354 1±0.015 4	0.048 8±0.000 4	310±86	308±12	307±2
	3	36.48	44.94	151.75	0.30	0.052 7±0.001 9	0.356 5±0.012 4	0.049 1±0.000 4	314±66	310±9	309±2
	4	24.77	55.93	123.94	0.45	0.054 9±0.003 3	0.368 1±0.021 8	0.048 6±0.000 4	407±119	318±16	306±2
	5	37.02	76.79	183.83	0.42	0.054 5±0.002 5	0.368 1±0.016 5	0.049 0±0.000 3	390±89	318±12	309±2
	6	39.51	66.76	209.68	0.32	0.054 1±0.002 6	0.355 1±0.016 6	0.047 6±0.000 4	372±110	309±12	300±2
	7	23.25	49.46	121.41	0.41	0.052 5±0.002 7	0.350 4±0.017 3	0.048 4±0.000 4	307±97	305±13	305±3
	8	46.09	69.34	241.49	0.29	0.052 8±0.001 8	0.352 7±0.011 1	0.048 4±0.000 3	319±60	307±8	305±2
	9	45.06	98.97	224.68	0.44	0.052 5±0.001 4	0.355 2±0.008 3	0.049 0±0.000 3	308±43	309±6	309±2
	10	44.14	93.45	219.67	0.43	0.052 5±0.001 7	0.350 8±0.010 7	0.048 4±0.000 3	306±59	305±8	305±2
	11	69.3	94.54	238.39	0.40	0.056 3±0.001 6	0.561 0±0.014 9	0.072 2±0.000 4	465±49	452±10	450±2
	12	74.41	198.44	345.75	0.57	0.052 5±0.001 2	0.351 0±0.007 0	0.048 5±0.000 3	307±36	306±5	305±2
	13	29.52	64.27	154.26	0.42	0.052 9±0.001 8	0.357 8±0.011 7	0.049 1±0.000 4	325±59	311±9	309±3
	14	41.63	96.6	196.82	0.49	0.053 9±0.001 4	0.363 5±0.008 4	0.048 8±0.000 3	368±41	315±6	308±2
PM201- 14H2	1	44.24	108.51	214.88	0.50	0.051 9±0.002 0	0.316 5±0.011 5	0.044 2±0.000 4	281±69	279±9	279±2
	2	153.92	332.34	539.24	0.62	0.046 1±0.004 0	0.279 4±0.024 0	0.044 1±0.000 2	277±190	250±19	278±1
	3	20.52	45.63	89.15	0.51	0.052 5±0.003 0	0.341 0±0.018 8	0.047 1±0.000 5	306±104	298±14	297±4
	4	17.12	69.4	80.24	0.86	0.053 1±0.004 0	0.360 6±0.026 4	0.049 3±0.000 4	331±150	313±20	310±3
	5	24.19	51.8	93.71	0.55	0.188 0±0.005 2	1.613 0±0.039 3	0.062 2±0.000 6	2 724±27	975±15	389±4
	6	18.84	56.08	96.17	0.58	0.051 9±0.002 3	0.315 6±0.013 1	0.044 1±0.000 4	282±79	279±10	278±2
	7	59.91	151.57	310.12	0.49	0.052 4±0.001 5	0.318 7±0.008 1	0.044 1±0.000 3	303±47	281±6	278±2
	8	33.68	55.07	168.91	0.33	0.051 8±0.001 7	0.316 1±0.009 7	0.044 2±0.000 3	277±56	279±7	279±2
	9	26.37	83.74	130.53	0.64	0.057 3±0.001 9	0.344 7±0.010 8	0.043 6±0.000 4	505±54	301±8	275±2
	10	185.52	555.5	917.7	0.61	0.054 1±0.001 1	0.330 0±0.006 2	0.044 2±0.000 2	376±45	290±5	279±1
	11	37.78	97.17	196.6	0.49	0.051 7±0.002 2	0.315 5±0.012 8	0.044 2±0.000 3	273±81	278±10	279±2

样品号	测点号	元素含量			Th/U	同位素比值			年龄/Ma
样品号	测点号	²⁰⁶Pb	Th	U	Th/U	²⁰⁷Pb/²⁰⁶Pb ±1σ	²⁰⁷Pb/²³⁵U ±1σ	²⁰⁶Pb/²³⁸U ±1σ	²⁰⁷Pb/²⁰⁶Pb ±1σ	²⁰⁷Pb/²³⁵U ±1σ	²⁰⁶Pb/²³⁸U ±1σ
PM201- 71H1	1	20.36	117.03	191.75	0.61	0.052 7±0.002 8	0.354 1±0.018 3	0.048 7±0.000 4	316±103	308±14	307±3
	2	27.47	62.73	145.24	0.43	0.052 6±0.002 4	0.354 1±0.015 4	0.048 8±0.000 4	310±86	308±12	307±2
	3	36.48	44.94	151.75	0.30	0.052 7±0.001 9	0.356 5±0.012 4	0.049 1±0.000 4	314±66	310±9	309±2
	4	24.77	55.93	123.94	0.45	0.054 9±0.003 3	0.368 1±0.021 8	0.048 6±0.000 4	407±119	318±16	306±2
	5	37.02	76.79	183.83	0.42	0.054 5±0.002 5	0.368 1±0.016 5	0.049 0±0.000 3	390±89	318±12	309±2
	6	39.51	66.76	209.68	0.32	0.054 1±0.002 6	0.355 1±0.016 6	0.047 6±0.000 4	372±110	309±12	300±2
	7	23.25	49.46	121.41	0.41	0.052 5±0.002 7	0.350 4±0.017 3	0.048 4±0.000 4	307±97	305±13	305±3
	8	46.09	69.34	241.49	0.29	0.052 8±0.001 8	0.352 7±0.011 1	0.048 4±0.000 3	319±60	307±8	305±2
	9	45.06	98.97	224.68	0.44	0.052 5±0.001 4	0.355 2±0.008 3	0.049 0±0.000 3	308±43	309±6	309±2
	10	44.14	93.45	219.67	0.43	0.052 5±0.001 7	0.350 8±0.010 7	0.048 4±0.000 3	306±59	305±8	305±2
	11	69.3	94.54	238.39	0.40	0.056 3±0.001 6	0.561 0±0.014 9	0.072 2±0.000 4	465±49	452±10	450±2
	12	74.41	198.44	345.75	0.57	0.052 5±0.001 2	0.351 0±0.007 0	0.048 5±0.000 3	307±36	306±5	305±2
	13	29.52	64.27	154.26	0.42	0.052 9±0.001 8	0.357 8±0.011 7	0.049 1±0.000 4	325±59	311±9	309±3
	14	41.63	96.6	196.82	0.49	0.053 9±0.001 4	0.363 5±0.008 4	0.048 8±0.000 3	368±41	315±6	308±2
PM201- 14H2	1	44.24	108.51	214.88	0.50	0.051 9±0.002 0	0.316 5±0.011 5	0.044 2±0.000 4	281±69	279±9	279±2
	2	153.92	332.34	539.24	0.62	0.046 1±0.004 0	0.279 4±0.024 0	0.044 1±0.000 2	277±190	250±19	278±1
	3	20.52	45.63	89.15	0.51	0.052 5±0.003 0	0.341 0±0.018 8	0.047 1±0.000 5	306±104	298±14	297±4
	4	17.12	69.4	80.24	0.86	0.053 1±0.004 0	0.360 6±0.026 4	0.049 3±0.000 4	331±150	313±20	310±3
	5	24.19	51.8	93.71	0.55	0.188 0±0.005 2	1.613 0±0.039 3	0.062 2±0.000 6	2 724±27	975±15	389±4
	6	18.84	56.08	96.17	0.58	0.051 9±0.002 3	0.315 6±0.013 1	0.044 1±0.000 4	282±79	279±10	278±2
	7	59.91	151.57	310.12	0.49	0.052 4±0.001 5	0.318 7±0.008 1	0.044 1±0.000 3	303±47	281±6	278±2
	8	33.68	55.07	168.91	0.33	0.051 8±0.001 7	0.316 1±0.009 7	0.044 2±0.000 3	277±56	279±7	279±2
	9	26.37	83.74	130.53	0.64	0.057 3±0.001 9	0.344 7±0.010 8	0.043 6±0.000 4	505±54	301±8	275±2
	10	185.52	555.5	917.7	0.61	0.054 1±0.001 1	0.330 0±0.006 2	0.044 2±0.000 2	376±45	290±5	279±1
	11	37.78	97.17	196.6	0.49	0.051 7±0.002 2	0.315 5±0.012 8	0.044 2±0.000 3	273±81	278±10	279±2

样品及编号		SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MgO	CaO	Na₂O	K₂O	MnO	P₂O₅	烧失量	总量	K₂O+ Na₂O	K₂O/ Na₂O	A/ CNK	A/ NK	Mg^#
PM201-71	晚石炭世花岗岩	77.27	0.06	11.96	1.37	1.00	0.07	0.35	3.77	4.64	0.03	0.04	0.32	100.87	8.41	1.23	1.01	1.07	0.11
D7406		76.62	0.06	12.41	1.11	0.55	0.11	0.51	3.50	5.21	0.01	0.08	0.36	100.53	8.71	1.49	1.01	1.09	0.27
D7421		76.59	0.05	12.42	1.63	0.90	0.09	0.25	3.70	4.67	0.03	0.03	0.53	100.88	8.37	1.26	1.07	1.12	0.16
D7422		75.80	0.08	12.64	2.08	0.95	0.13	0.33	3.73	4.61	0.04	0.03	0.50	100.92	8.34	1.24	1.08	1.14	0.20
D7414		76.25	0.06	12.69	1.35	0.75	0.14	0.47	3.74	4.68	0.03	0.06	0.51	100.72	8.42	1.25	1.05	1.13	0.26
D7430		75.73	0.09	12.76	1.64	0.90	0.24	0.53	3.78	4.60	0.05	0.04	0.52	100.88	8.38	1.22	1.05	1.14	0.33
PM201-14	早二叠世花岗岩	74.63	0.16	13.22	2.37	1.25	0.18	0.54	3.10	4.84	0.03	0.20	0.71	101.22	7.94	1.56	1.17	1.28	0.21
D7439		75.18	0.10	13.62	1.63	0.95	0.12	0.34	3.28	4.73	0.03	0.16	0.79	100.92	8.01	1.44	1.22	1.30	0.19
D7440		74.62	0.16	12.91	2.55	1.75	0.19	0.59	3.11	5.08	0.03	0.18	0.56	101.73	8.19	1.63	1.10	1.22	0.17
D7445		75.17	0.12	12.75	2.16	1.60	0.13	0.42	3.05	4.95	0.03	0.18	0.92	101.48	8.00	1.62	1.14	1.23	0.13
D7446		76.47	0.11	12.88	1.08	0.95	0.11	0.30	3.32	4.65	0.02	0.18	0.87	100.94	7.97	1.40	1.17	1.23	0.18

样品及编号		SiO₂	TiO₂	Al₂O₃	Fe₂O₃	FeO	MgO	CaO	Na₂O	K₂O	MnO	P₂O₅	烧失量	总量	K₂O+ Na₂O	K₂O/ Na₂O	A/ CNK	A/ NK	Mg^#
PM201-71	晚石炭世花岗岩	77.27	0.06	11.96	1.37	1.00	0.07	0.35	3.77	4.64	0.03	0.04	0.32	100.87	8.41	1.23	1.01	1.07	0.11
D7406		76.62	0.06	12.41	1.11	0.55	0.11	0.51	3.50	5.21	0.01	0.08	0.36	100.53	8.71	1.49	1.01	1.09	0.27
D7421		76.59	0.05	12.42	1.63	0.90	0.09	0.25	3.70	4.67	0.03	0.03	0.53	100.88	8.37	1.26	1.07	1.12	0.16
D7422		75.80	0.08	12.64	2.08	0.95	0.13	0.33	3.73	4.61	0.04	0.03	0.50	100.92	8.34	1.24	1.08	1.14	0.20
D7414		76.25	0.06	12.69	1.35	0.75	0.14	0.47	3.74	4.68	0.03	0.06	0.51	100.72	8.42	1.25	1.05	1.13	0.26
D7430		75.73	0.09	12.76	1.64	0.90	0.24	0.53	3.78	4.60	0.05	0.04	0.52	100.88	8.38	1.22	1.05	1.14	0.33
PM201-14	早二叠世花岗岩	74.63	0.16	13.22	2.37	1.25	0.18	0.54	3.10	4.84	0.03	0.20	0.71	101.22	7.94	1.56	1.17	1.28	0.21
D7439		75.18	0.10	13.62	1.63	0.95	0.12	0.34	3.28	4.73	0.03	0.16	0.79	100.92	8.01	1.44	1.22	1.30	0.19
D7440		74.62	0.16	12.91	2.55	1.75	0.19	0.59	3.11	5.08	0.03	0.18	0.56	101.73	8.19	1.63	1.10	1.22	0.17
D7445		75.17	0.12	12.75	2.16	1.60	0.13	0.42	3.05	4.95	0.03	0.18	0.92	101.48	8.00	1.62	1.14	1.23	0.13
D7446		76.47	0.11	12.88	1.08	0.95	0.11	0.30	3.32	4.65	0.02	0.18	0.87	100.94	7.97	1.40	1.17	1.23	0.18

样品及编号		Li	Be	Sc	V	Cr	Co	Ni	Cu	Zn	Ga	Rb	Sr	Nb	Mo	Cd	In
PM201-71	晚石炭世花岗岩	50.10	5.78	3.05	4.06	23.50	1.27	4.09	12.30	26.90	16.00	200.00	11.50	7.50	1.24	0.03	0.06
D7406		15.10	4.25	2.38	11.30	38.50	1.02	3.14	4.19	7.22	12.60	140.00	10.50	6.56	1.37	0.03	0.02
D7421		19.30	3.31	1.75	11.10	28.20	1.21	4.72	5.50	32.90	12.00	221.00	5.26	8.70	0.86	0.05	0.06
D7422		34.90	4.61	2.62	13.90	26.00	3.08	6.61	5.26	23.00	14.30	211.00	8.93	10.50	0.87	0.05	0.05
D7414		25.60	3.44	2.28	11.30	23.20	1.71	4.42	4.06	45.70	14.80	206.00	16.20	4.76	0.98	0.06	0.04
D7430		45.60	8.23	4.07	11.90	21.10	2.43	5.33	5.74	28.50	15.90	261.00	36.50	10.20	1.11	0.07	0.07
PM201-14	早二叠世花岗岩	73.60	5.55	5.09	20.80	12.90	2.21	5.72	5.93	91.30	23.60	207.00	39.60	16.10	0.75	0.25	0.13
D7439		47.50	11.50	4.62	17.50	12.80	2.18	6.63	7.31	76.80	24.90	223.00	34.30	13.80	0.81	0.21	0.26
D7440		54.80	5.50	2.24	10.80	30.50	1.75	5.26	4.28	67.60	21.30	150.00	22.10	16.80	1.18	0.17	0.14
D7445		47.90	4.00	4.28	12.40	29.20	1.93	7.49	13.70	78.60	21.40	211.00	34.50	15.90	1.72	0.38	0.25
D7446		44.00	4.31	5.12	8.66	23.60	1.92	4.88	4.84	48.40	20.50	212.00	38.50	16.80	1.10	0.10	0.17
样品及编号		Sb	Cs	Ba	Ta	W	Re	Tl	Pb	Bi	Th	U	Zr	Hf	K/Rb	Rb/Sr	Rb/Ba
PM201-71	晚石炭世花岗岩	0.32	9.83	23.00	1.92	3.12	0.00	1.01	26.50	2.65	7.26	2.90	57.10	3.49	9.63	17.39	8.70
D7406		0.39	3.98	28.30	1.30	0.68	0.00	0.49	18.60	0.34	7.97	1.52	95.20	4.18	15.45	13.33	4.95
D7421		0.29	8.36	14.40	1.83	2.56	0.01	0.89	17.40	0.48	3.97	1.66	79.20	4.01	8.77	42.02	15.35
D7422		0.42	11.90	25.20	2.00	3.61	0.02	1.43	17.50	0.18	5.45	3.11	105.00	5.63	9.07	23.63	8.37
D7414		0.34	8.60	43.40	0.98	0.97	0.00	1.07	29.90	0.10	6.75	4.66	89.60	5.25	9.43	12.72	4.75
D7430		0.26	15.10	78.30	2.31	2.84	0.01	1.55	22.50	0.06	9.86	2.76	95.70	4.68	7.32	7.15	3.33
PM201-14	早二叠世花岗岩	7.51	10.40	175.00	1.62	2.97	0.00	1.16	27.50	0.71	8.76	3.54	135.00	5.36	9.71	5.23	1.18
D7439		9.70	8.73	173.00	2.03	5.30	0.00	1.29	21.20	3.52	6.13	3.78	76.60	3.43	8.80	6.50	1.29
D7440		0.43	9.43	158.00	1.60	2.53	0.01	1.81	17.20	0.37	7.14	2.16	146.00	4.98	14.06	6.79	0.95
D7445		0.36	8.12	145.00	1.90	4.23	0.04	2.08	23.00	1.71	6.94	4.56	122.00	4.18	9.74	6.12	1.46
D7446		0.37	7.45	178.00	3.08	3.01	0.01	1.57	15.40	1.30	6.94	1.81	107.00	4.01	9.10	5.51	1.19