文献类型：期刊文献

英文题名：Geological, geophysical, and geochemical characteristics of the Ban Kiouchep Cu-Pb-Ag deposit and its exploration significance in Northern Laos

作者：Zou, Haijun Han, Runsheng Liu, Mengqiong Cromie, Paul Zaw, Khin Fang, Weixuan Huang, Jianguo Ren, Tao Wu, Jin

第一作者：Zou, Haijun

通信作者：Zou, HJ[1]

机构：[1]Guizhou Inst Technol, Sch Resources & Environm Engn, Guiyang 550003, Peoples R China;[2]Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550081, Peoples R China;[3]Kunming Univ Sci & Technol, Fac Land & Resources Engn, Kunming 650093, Yunnan, Peoples R China;[4]Yunnan Prov Architectural Engn Design Inst, Kunming 650021, Yunnan, Peoples R China;[5]Univ Tasmania, CODES Ctr Ore Deposits & Earth Sci, Private Bag 126, Hobart, Tas 7001, Australia;[6]Geol Survey Ctr Nonferrous Mineral Resources, Beijing 100012, Peoples R China;[7]Yunnan Copper Ind Grp, Kunming 650051, Yunnan, Peoples R China

第一机构：贵州理工学院资源与环境工程学院

通信机构：corresponding author), Guizhou Inst Technol, Sch Resources & Environm Engn, Guiyang 550003, Peoples R China.|贵州理工学院资源与环境工程学院;贵州理工学院;

年份：2020

卷号：124

外文期刊名：ORE GEOLOGY REVIEWS

收录：;EI(收录号：20202308799352);Scopus(收录号：2-s2.0-85085938136);WOS:【SCI-EXPANDED(收录号:WOS:000564289600002)】；

基金：This study is funded by the National 973 Program of China (2014CB440906). We thank Yunnan Copper Industry (Group) Co., Ltd. for its support of this research. We thank the reviewers, the editors, and Profs. Ruizhong Hu, Zhilong Huang, and Xianwu Bi (Institute of Geochemistry, CAS) and Prof. Jiaxi Zhou (Yunnan University) for the valuable suggestions. We appreciate Prof. Xiaoyong Yang's recommendation. The first author also thank Mr. Achong Laomao (Director of Investment Department, Ministry of Planning and Investment, Lao PDR), Dr. Khampha Phommakaysone (Director of Geology Department, Ministry of Natural Resources and Environment, Lao PDR) and Simon Pijid (Director of Mining Department, Ministry of Energy and Mines, Lao PDR) for the help. Paul Cromie and Khin Zaw are thankful to previous and current colleagues from CODES, University of Tasmania for their constructive discussion and comments.

语种：英文

外文关键词：Hydrothermal deposit; Oxidation leaching; Lateritization; Ban Kiouchep Cu-Pb-Ag deposit; Simao-Indochina Basin; Northern Laos

摘要：The Simao-Indochina Basin is located between the Loei-Luang Prabang-Dien Bien Phu fold belt and the Jinghong-Nan-Uttaradit suture zone, composed of Mesozoic and Cenozoic red beds. It overlies the marine clastic rocks and volcanic sedimentary rocks of a Paleozoic back-arc foreland sequence. The Late Triassic Indosinian orogeny and subsequent superimposition and intracontinental shearing and structural superimposition may have facilitated the formation of various deposits in this basin, including hydrothermal, skarn, and porphyry types of mineralization. The Ban Kiouchep Cu-Pb-Ag deposit is a medium-low-temperature hydrothermal deposit that is largely controlled by faults and is hosted in carbonate rocks and volcanic (-sedimentary) rocks. The formation of this deposit includes a series of geological and metallogenic processes (i) neritic-littoral facies (volcanic-) sedimentation in a Late Paleozoic to Late Triassic back-arc foreland setting, (ii) Indosinian orogenic transformation, (iii) Mesozoic-Cenozoic tectonic-hydrothermal overprinting, and (iv) epigenetic oxidized leaching. The ore minerals are primarily malachite, azurite, and galena, followed by sphalerite, chalcocite, and chalcopyrite, with associated silver minerals. Using induced polarization (IP) geophysical surveys and soil geochemical surveys, large-scale and highly overlapping coincident anomalies and a mineralized zone at a scale of 100-110-m size (ore body I) was discovered in the area. Two anomalies, P1-C1 and P5-C4, with the best metallogenic conditions and the deepest extensions of the known ore bodies, were further selected as engineering verification targets. The two following verifying drill holes revealed Pb-Zn-Ag mineralization in the fault zone; however, no mineralized ore bodies consistent with the anomalies were found. The high background value of the Fe-Cu-Pb-Zn (Ag) elements, strong fracturing, and hydrothermal alteration, as well as later oxidized leaching with lateritization, resulted in in-situ dispersion and local secondary enrichment of the metallogenic elements. These may be the primary causes of the overlapping anomaly distribution along the strata and faults therein. Lateritic Ag mineralization has been also found in the area. The geological, geophysical, and geochemical characteristics and the prospecting are of great importance for further research and prospecting for other related deposits, for example, the VHMS, SEDEX, hydrothermal Cu polymetallic deposits and porphyry, skarn, epithermal, sedimenthosted/orogenic Au deposits, with lateritic Ag (Au) deposits in the Simao-Indochina Basin of Northern Laos.