Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s12583-017-0548-8 |
Atacamite and Nantokite in Kaerqueka Copper Deposit of Qimantag Area: Evidence for Cenozoic Climate Evolution of the Qaidam Basin | |
Yi, Liwen1; Gu, Xiangping2,3; Lu, Anhuai2,3; Li, Xiangyu4; Zhang, Dexian2,3; Wang, Zhiling2,3; Liu, Jianping2,3; Li, Shuai2,3; Shu, Zhengxiang2,3; Yu, Cia2,3; Zuo, Hongyan2,3; Shen, Can2,3 | |
通讯作者 | Lu, Anhuai |
来源期刊 | JOURNAL OF EARTH SCIENCE
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ISSN | 1674-487X |
EISSN | 1867-111X |
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.%, 0: 21.46 wt.%. X-ray microdiffraction shows that the intergrowth contains nantokite with a cubic unit cell a=5.403(2) angstrom and atacamite with an orthorhombic unit cell a=6.030(3), b=6.883(2), c=9.114(1) angstrom. 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 |
国家 | Peoples R China |
收录类别 | SCI-E |
WOS记录号 | WOS:000402694100008 |
WOS关键词 | SOUTHERN ASIA ; MOUNTAINS ; UPLIFT ; CHINA ; BELT ; PETROGENESIS ; PLATEAU ; KUNLUN ; CHILE |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/200311 |
作者单位 | 1.Hunan Normal Univ, Coll Resources & Environm Sci, Changsha 410081, Hunan, Peoples R China; 2.Minist Educ, Key Lab Metallogen Predict Nonferrous Met & Geol, Changsha 410083, Hunan, Peoples R China; 3.Cent S Univ, Sch Geosci & Infophys, Changsha 410083, Hunan, Peoples R China; 4.Hunan Inst Geol Survey, Changsha 410116, Hunan, Peoples R China |
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. |
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