Geochronology evidence of Mesozoic metallogenesis and Cenozoic oxidation at Hongshan HS-epithermal Cu-Au deposit, Kalatage region, eastern Tianshan, and its tectonic and paleoclimatic significances

	Geochronology evidence of Mesozoic metallogenesis and Cenozoic oxidation at Hongshan HS-epithermal Cu-Au deposit, Kalatage region, eastern Tianshan, and its tectonic and paleoclimatic significances
	Xu YingXia 1; Qin KeZhang 1; Ding KunShou 1; Li JinXiang 1; Miao Yu 1; Fang TongHui 3; Xu XingWang 1; Li DaMing 4; Luo XiuQuan 5
刊名	ACTA PETROLOGICA SINICA
	2008-10-01
卷号	24 期号:10 页码:2371-2383
关键词	HS-epithermal Cu-Au deposit Mesozoic Oxidation Sulfates K-Ar age dating Ar-Ar age dating The driest areas in eastern Tianshan
ISSN号	1000-0569
文献子类	Article
英文摘要	Located in the Paleozoic uplift along the. southern margin of Tu-Ha basin in eastern Xinjiang, the newly discovered Hongshan HS-epithermal to porphyry Cu-Au deposit occurs in the superimposed Mesozoic volcanic basin upon the north section of Late Paleozoic Dananhu-Tousuquan accretionary are. Hongshan Cu-Au deposit, on the edge of the desert, is one of the driest areas in eastern Tianshan. Moreover, the highest temperature has been up to 60 degrees C, and the average rainfall receives only 34. 1 mm/y. The light rainfall and rapid evaporation in the vicinity of this deposit have allowed the formation of a great variety of water-soluble sulfates. Oxidization zone of this deposit lies on the upper part of primary sulfide orebodies appearing with a depth of 50m similar to 60m, which is dominant in Sulfate minerals. The Hongshan Cu-Au deposit is controlled by the tectonic, stratum, magma activity and volcanic apparatus, whereas Cu-Au mineralization is closely related to volcanic activity in Mesozoic and sub-volcanic intrusive rocks. K-Ar isotopic ages of biotite and hornblende from the wall rock-quartz diorite, biotite granite and monzonite granite are 296. 5 +/- 6.7Ma, 232.0 +/- 3.5Ma and 217.10 +/- 6.41 Ma respectively. And Ar-Ar isotopic age of biotite from biotite granite is 238.0 +/- 2.4Ma. The ore-bearing rhyolitic breccia lava contains breccia of the biotite granite, which indicates the volcanism, and related Cu-Au mineralization occurred later than the granite, possibly in Mesozoic. K-Ar ages of granitoids in Sanya, Baishiquan and Hongliugou area and Molybdenite Re-Os age of Baishan Mo deposit all are in Triassic. Besides I-ate Paleozoic magmatism, Mesozoic magmatic event was widespread in eastern Tianshan. The K-Ar age dating indicates that the K-Ar age of Voltaite occurred below surface 1m is 56.0 +/- 4.0Ma, K-Ar age of Ferricopiapite occurred below surface 1.5m is (8.6 +/- 1. 1) Ma, K-Ar age of Yavapaiite occurred below surface 14m is 4.1 +/- 0.4Ma, and K-Ar age of voltaite occurred below surface 10m is (14.3 +/- 1. 7) Ma. So the age interval of oxidation zone is between 60 similar to 3. 4M a in Hongshan Cu -Au deposit. Oxidization and weathering occurred at Cenozoic era (from 65M a) in oxidation zone, which can be identified through comparing with different deposits. The oxidation ages of Hongshan not only coincide with collision of India-Asia and multistage uplifting of Qinhai-Tibet Plateau Subsequently, but also is the effect and record of collision and uplifting of Tibet Plateau. The predecessor did much research through biota, isotopes, and susceptibility in PETM event. This paper tries to use different sulfate minerals demonstrating climatic change.
WOS关键词	AR-40/AR-39 GEOCHRONOLOGY ; NW-CHINA ; K-AR ; YAVAPAIITE ; PYRITE ; TIME
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000262520800018
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/69634]
专题	中国科学院地质与地球物理研究所
通讯作者	Xu YingXia
作者单位	1.CAS, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Hebei Polytech Univ, Dept Geol, Tangshan 063009, Peoples R China 3.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China 4.China Earthquake Adm, Inst Geol, Beijing 100029, Peoples R China 5.RIPED, Petr Geol Res & Lab Ctr, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Xu YingXia,Qin KeZhang,Ding KunShou,et al. Geochronology evidence of Mesozoic metallogenesis and Cenozoic oxidation at Hongshan HS-epithermal Cu-Au deposit, Kalatage region, eastern Tianshan, and its tectonic and paleoclimatic significances[J]. ACTA PETROLOGICA SINICA,2008,24(10):2371-2383.
APA	Xu YingXia.,Qin KeZhang.,Ding KunShou.,Li JinXiang.,Miao Yu.,...&Luo XiuQuan.(2008).Geochronology evidence of Mesozoic metallogenesis and Cenozoic oxidation at Hongshan HS-epithermal Cu-Au deposit, Kalatage region, eastern Tianshan, and its tectonic and paleoclimatic significances.ACTA PETROLOGICA SINICA,24(10),2371-2383.
MLA	Xu YingXia,et al."Geochronology evidence of Mesozoic metallogenesis and Cenozoic oxidation at Hongshan HS-epithermal Cu-Au deposit, Kalatage region, eastern Tianshan, and its tectonic and paleoclimatic significances".ACTA PETROLOGICA SINICA 24.10(2008):2371-2383.