Metallogenic epoch and tectonic setting of epithermal gold deposits in the northeastern Kazakhstan Tianshan

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	Metallogenic epoch and tectonic setting of epithermal gold deposits in the northeastern Kazakhstan Tianshan
	Wu, GA (Wu Guang); Chen, YC (Chen YuChuan); Chen, YJ (Chen YanJing)
刊名	ACTA PETROLOGICA SINICA
	2010
卷号	26 期号:12 页码:3683-3695
关键词	Arharlei Au deposit Wurenkebulake Au deposit Epithermal gold deposits (40)Ar/(39) Ar age Tectonic setting Northeastern Kazakhstan Tianshan
ISSN号	1000-0569
英文摘要	A lot of epithermal gold deposits and occurrences, such as Arharlei and Wurenkebulake deposits, have been found in the northeastern Kazakhstan Tianshan, which is one of the important epithermal gold metallogenic belts in the Central Asian Orogenic Belt. Whereas, the metallogenetic chronology study of the gold deposits is poor. To time the mineralization, the authors dated andesite and andesitic basalt from the host rocks of the Arharlei and Wurenkebulake deposits, respectively, using high-resolution laser-ablation (40)Ar/(39) Ar method. Twenty analyses of andesites from the Arharlei deposit yielded a (40)Ar/(39) Ar isochron age of 304 +/- 7Ma (MSWD = 6), and 21 of andesitic basalts from the Wurenkebulake deposit deposit yielded a (40)Ar/(39) Ar isochron age of 280 +/- 6Ma (MSWD = 2.4). This shows that the gold deposits in the northeastern Kazakhstan Tianshan have been formed between end Late Carboniferous and Early Permian. Petrology and geochemistry primarily studied by the authors show that the volcanic rocks related to these epithermal gold deposits in this region are mainly of high-K calc-alkaline and shoshonite series, and comprise mainly rhyolite, trachyandesite, basaltic trachyandesite, basaltic andesite, trachybasalt and basalt, with bimodal features. The epithermal gold deposits of the end Late Carboniferous might be formed in a transitional period from continent-continent collision to rift environments, whilst the Permian epithermal gold deposits were formed in an intracontinental rift setting.
学科主题	矿床地质
WOS关键词	CARBONIFEROUS VOLCANIC-ROCKS ; WESTERN TIANSHAN ; NORTHERN XINJIANG ; NW CHINA ; NORTHWESTERN CHINA ; SHRIMP CHRONOLOGY ; OROGENIC BELT ; CENTRAL-ASIA ; EVOLUTION ; GEOCHEMISTRY
WOS研究方向	Geology
语种	中文
出版者	SCIENCE CHINA PRESS
WOS记录号	WOS:000286452000019
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39134]
专题	中国地质调查局
作者单位	Peking Univ, Minist Educ, Key Lab Orogen & Crust Evolut, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Wu, GA ,Chen, YC ,Chen, YJ . Metallogenic epoch and tectonic setting of epithermal gold deposits in the northeastern Kazakhstan Tianshan[J]. ACTA PETROLOGICA SINICA,2010,26(12):3683-3695.
APA	Wu, GA ,Chen, YC ,&Chen, YJ .(2010).Metallogenic epoch and tectonic setting of epithermal gold deposits in the northeastern Kazakhstan Tianshan.ACTA PETROLOGICA SINICA,26(12),3683-3695.
MLA	Wu, GA ,et al."Metallogenic epoch and tectonic setting of epithermal gold deposits in the northeastern Kazakhstan Tianshan".ACTA PETROLOGICA SINICA 26.12(2010):3683-3695.