Sr-Nd-Pb isotope geochemistry and tectonic setting of Devonian polymetallic metallogenic belt on the Southern margin of Altaid, Xingjing.

	Sr-Nd-Pb isotope geochemistry and tectonic setting of Devonian polymetallic metallogenic belt on the Southern margin of Altaid, Xingjing.
	Wan, B ; Zhang, LC
刊名	ACTA PETROLOGICA SINICA
	2006
卷号	22 期号:1 页码:145-152
关键词	Keketale metallogenic belt VMS deposit Sr-Nd-Pb isotope sources of ore-forming material tectonic setting
ISSN号	1000-0569
文献子类	Article
英文摘要	There are several polymetallic metallogenic belts within the Paleozoic volcanic rock belt on the Southern margin of Altaid, in which both Ashele and Keketale belt are the most famous. It is found that most deposits hosted by early-middle Devonian volcanic rock are the VMS type. Some rules are identified after we carried out isotope studies on some representative deposits. The values of initial Sr increase gradually from Qiaoxiahala to Keketale (0.704407 to 0.714485), and the epsilon(Nd) (t) values change from positive to negative coincidentally. It means that the origin of ore-forming material is mainly from the mantle. All of the selected deposits have the characteristics of island arc except Qiaoxiahala (MORB type) based on the Pb isotope data. In the meanwhile most of Pb isotopic data are the normal Pb except the Keketale deposit that it may be mixed by radiogenic lead. Therefore, we conclude that the ore-forming material mainly comes from mantle, and there is more and more crustal material getting mixed in from south to north. Finally, we provide a supposed metallogenic model based on the geochemical and geologic characteristics; Qiaoxiahala copper-iron-gold deposit should form in a MORB setting, Ashele copper-zinc deposit may locate in an inner-island arc basin; Timuerte copper-lead-zinc deposit, Mengku iron (copper) deposit and Keketala lead-zinc deposit maybe form in the back-arc basin.
WOS关键词	NW CHINA ; EVOLUTION ; GROWTH
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000235920900015
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/66992]
专题	中国科学院地质与地球物理研究所
通讯作者	Wan, B
作者单位	1.Chinese Acad Sci, Key Lab Mineral Resources, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Grad Univ Chinese Acad Sci, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Wan, B,Zhang, LC. Sr-Nd-Pb isotope geochemistry and tectonic setting of Devonian polymetallic metallogenic belt on the Southern margin of Altaid, Xingjing.[J]. ACTA PETROLOGICA SINICA,2006,22(1):145-152.
APA	Wan, B,&Zhang, LC.(2006).Sr-Nd-Pb isotope geochemistry and tectonic setting of Devonian polymetallic metallogenic belt on the Southern margin of Altaid, Xingjing..ACTA PETROLOGICA SINICA,22(1),145-152.
MLA	Wan, B,et al."Sr-Nd-Pb isotope geochemistry and tectonic setting of Devonian polymetallic metallogenic belt on the Southern margin of Altaid, Xingjing.".ACTA PETROLOGICA SINICA 22.1(2006):145-152.