干旱区生态环境知识资源中心(Arid): Atacamite and Nantokite in Kaerqueka Copper Deposit of Qimantag Area: Evidence for Cenozoic Climate Evolution of the Qaidam Basin

Arid

	Atacamite and Nantokite in Kaerqueka Copper Deposit of Qimantag Area: Evidence for Cenozoic Climate Evolution of the Qaidam Basin
	Yi Liwen; Gu Xiangping; Lu Anhuai; Li Xiangyu; Zhang Dexian; Wang Zhiling; Liu Jianping; Li Shuai; Shu Zhengxiang; Yu Cui; Zuo Hongyan; Shen Can
来源期刊	Journal of Earth Science
ISSN	1674-487X
出版年	2017
卷号	28 期号:3 页码:492-499
英文摘要	Using a mineralogy method to reflect climate evolution is a new approach to research Cenozoic environmental progression of the Qaidam Basin. In this paper, we present the chemical composition and crystallographic parameter of atacamite, nantokite, and tenorite in cryptocrystalline aggregates from the Kaerqueka copper deposit of Qimantag metallogenic belt by means of electron microprobe and in-situ X-ray diffraction analyses. Atacamite and nantokite occur in an intimate intergrowth as the secondary precipitation of chalcopyrite and bornite filling in the interstitial space of andradite in the Kaerqueka copper deposit, with an average composition of Cl: 12.38 wt.%, Cu: 63.76 wt.%, O: 21.46 wt.%. X-ray microdiffraction shows that the intergrowth contains nantokite with a cubic unit cell a=5.403(2) A and atacamite with an orthorhombic unit cell a=6.030(3), b=6.883(2), c=9.114(1) A. XRD quantitative calculation shows that the nanometric aggregate contains 36.07 wt.% tenorite, 18.41 wt.% atacamite, and 45.52 wt.% nantokite. The presence of nantokite and atacamite requires saline solutions for their formation and hyper-arid climate conditions for their preservation. Combined with the data of salt lakes and the pollen sequence of western China, we suggest that during the uplift of the Tibetan Plateau and the retreat of the Paratethys, saline water was forced to the surface through a basal fracture zone. In the hyper-arid climate of the Qaidam Basin, the recharge of groundwater by direct precipitation is negligible, and groundwater is derived from inflow from the salt lakes. Thus, atacamite is preserved. In addition, spertiniite in the edge and fractures of atacamite and nantokite may represent wetter climate after the formation of atacamite and nantokite.
英文关键词	atacamite nantokite climate evolution Qaidam Basin
类型	Article
语种	英语
收录类别	CSCD
WOS研究方向	Geology
CSCD记录号	CSCD:5993966
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335810
作者单位	Yi Liwen, College of Resources and Environmental Sciences, Hunan Normal University, Changsha, Hunan 410081, China.; Gu Xiangping, School of Geosciences and Info-Physics, Central South University, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitor, Ministry of Education, Changsha, Hunan 410083, China.; Lu Anhuai, School of Geosciences and Info-Physics, Central South University, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitor, Ministry of Education, Changsha, Hunan 410083, China.; Zhang Dexian, School of Geosciences and Info-Physics, Central South University, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitor, Ministry of Education, Changsha, Hunan 410083, China.; Wang Zhiling, School of Geosciences and Info-Physics, Central South University, Key Laboratory of Metallogenic Prediction of Nonferrous Metals and Geological Environment Monitor, Ministry of Education, Cha...
推荐引用方式 GB/T 7714	Yi Liwen,Gu Xiangping,Lu Anhuai,et al. Atacamite and Nantokite in Kaerqueka Copper Deposit of Qimantag Area: Evidence for Cenozoic Climate Evolution of the Qaidam Basin[J],2017,28(3):492-499.
APA	Yi Liwen.,Gu Xiangping.,Lu Anhuai.,Li Xiangyu.,Zhang Dexian.,...&Shen Can.(2017).Atacamite and Nantokite in Kaerqueka Copper Deposit of Qimantag Area: Evidence for Cenozoic Climate Evolution of the Qaidam Basin.Journal of Earth Science,28(3),492-499.
MLA	Yi Liwen,et al."Atacamite and Nantokite in Kaerqueka Copper Deposit of Qimantag Area: Evidence for Cenozoic Climate Evolution of the Qaidam Basin".Journal of Earth Science 28.3(2017):492-499.