Geochronology, geochemistry and Hf isotopic compositions of the granitic rocks related with iron mineralization in Yemaquan deposit, East Kunlun, NW China.

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	Geochronology, geochemistry and Hf isotopic compositions of the granitic rocks related with iron mineralization in Yemaquan deposit, East Kunlun, NW China.
	Gao YongBao 1; Li WenYuan ; Qian Bing ; Li Kan ; Li DongSheng 2; He ShuYue 2; Zhang ZhaoWei 1; Zhang JiangWei
刊名	ACTA PETROLOGICA SINICA
	2014
卷号	30 期号:6 页码:1647-1665
关键词	Geochemistry Geochronology Hf isotopes Granitoids Yemaquan iron deposit East Kunlun Mountain
ISSN号	1000-0569
英文摘要	The large-scale Yemaquan iron polymetallic deposit is located in Qimantage, East Kunlun, and the granitic rocks are closely related with iron polymetallic mineralization The results of LA-ICP-MS zircon U-Pb isotope dating reveal that monzogranite and granodiorite in the north ore district were formed in 393 +/- 2Ma and 386 +/- 1Ma respectively, while porphyritic quartz monzonitic diorite and syenogranite in the south ore district were formed in 219 +/- 1Ma and 213 +/- 1Ma respectively. Major and trace element data of the Early-Middle Devonian monzogranite and granodiorite show the similar characteristics, with high K calc-alkaline, A/CNK (0. 92 similar to 01) <1. 1, medium to strong negative Eu anomalies ( delta Eu = 0. 60 similar to 0. 81), depleted in P, Nb, Ta, Ti, Sr and Ba, enriched in LREE, Rb, Th, U and K, all of which imply they may be the I-type granite series. The Late Triassic porphyritic quartz monzonite diorites are I-type granites, characterized by A/CNK (0. 88 similar to 0. 95) <1, LREE enrichment, medium to strong negative Eu anomalies (delta Eu =0.49 similar to 0. 67), rich LILEs such as Rb, U, Th and K, depleted HFSEs such as P, Nb, Ta, Ti, Sr and Ba. Chemical analyses show the Late Triassic syenogranite has high SiO2 (77. 20% similar to 78. 13%), high alkaline ( IC20 + Na-2 0 =7. 91% -8. 27%), low Al2O3 (11. 71% similar to 12. 18%), low CaO (0.90% -1. 01%), enriched in LREE, Y, Zr, Hf, Th, U and Ga, depleted in Ba, Sr, P, Ti, Eu, strong negative Eu anomalies (5Eu =0. 08 similar to 0. 13). These characteristics suggest the syenogranites are typical A-type granites. The sHf( t) values of the Early-Middle Devonian monzogranite and granodiorite vary from -3. 3 to 6. 2, and the ( t) values of Late Triassic syenogranite and porphyritic quartz monzonitic diorite range from - 6. 3 to 5. 5. The similar Hf isotopic compositions indicate a significiant involvement of mantle components in petrogenesis. It is suggested that the Early-Middle Devonian and Late Triassic magmatic rocks in Yemaquan deposit might be formed by underplating and magma mixing in the Early Paleozoic and Late Paleozoic to Early Mesozoic collision-post collision stage respectively. The magma mixing provides a large number of ore-forming materials for largescale polymetallic mineralizations.
学科主题	矿床地质
WOS关键词	U-PB ; LASER-ABLATION ; LU-HF ; ZIRCON ; MANTLE ; PETROGENESIS ; QIMANTAG ; MICROANALYSIS ; CHRONOLOGY ; MOUNTAIN
WOS研究方向	Geology
语种	中文
出版者	SCIENCE PRESS
WOS记录号	WOS:000338487400009
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/40275]
专题	中国地质调查局西安地质调查中心
作者单位	1.Xian Ctr China Geol Survey, MLR Key Lab Genesis & Explorat Magmat Ore Deposit, Xian 710054, Peoples R China 2.Changan Univ, Coll Earth Sci & Resources, Xian 710054, Peoples R China 3.Geol Prospecting Inst Qinghai, Xining 810029, Peoples R China
推荐引用方式 GB/T 7714	Gao YongBao,Li WenYuan,Qian Bing,et al. Geochronology, geochemistry and Hf isotopic compositions of the granitic rocks related with iron mineralization in Yemaquan deposit, East Kunlun, NW China.[J]. ACTA PETROLOGICA SINICA,2014,30(6):1647-1665.
APA	Gao YongBao.,Li WenYuan.,Qian Bing.,Li Kan.,Li DongSheng.,...&Zhang JiangWei.(2014).Geochronology, geochemistry and Hf isotopic compositions of the granitic rocks related with iron mineralization in Yemaquan deposit, East Kunlun, NW China..ACTA PETROLOGICA SINICA,30(6),1647-1665.
MLA	Gao YongBao,et al."Geochronology, geochemistry and Hf isotopic compositions of the granitic rocks related with iron mineralization in Yemaquan deposit, East Kunlun, NW China.".ACTA PETROLOGICA SINICA 30.6(2014):1647-1665.