The Hongguleleng Cu deposit is a Manto-type deposit in the Central Asian Orogenic Belt, located in the east part of West Junggar, Xinjiang, China. It differs from other Manto-type Cu deposits in a few ways. In this study, we use a geochemical approach to discover geological differences and explore genesis. The Middle Ordovician volcano-sedimentary sequence, especially porous units, hosts it. The orebodies of this Manto-type deposit are found in breccia host rocks such as basalt, andesite, and andesitic breccia (the particular volcano-sedimentary sequence). The occurrence of these orebodies is controlled by normal faults. Chalcopyrite, pyrite, calcite, chlorite, and epidote are the most prevalent minerals found in the Hongguleleng deposit. Three alternation belts have been found, as well as six ore-related stages. Ore formation stages include epidote-chalcopyrite, quartz-calcite-chalcopyrite, and chlorite. The 34S of chalcopyrite in the ore depositing stage ranges from 0.94 to 2.59, showing that sulphur comes from magma or host volcanic rock. Furthermore, the chlorite-chalcopyrite and quartz-calcite-chalcopyrite stages had 206Pb/204Pb, 207Pb/204Pb, and 208Pb/204Pb values in the ranges of 17.443–17.847 and 17.855–17.973; 15.472–15.495 and 15.493–15.62; and 37.616–37.666 and 37.689–38.114, showing that the metal (MORB). The 13CPDB values of calcite for epidote-chalcopyrite stage ores, quartz-calcite-chalcopyrite ores with veinlet characteristics, quartz-calcite-chalcopyrite ores with brecciated characteristics, and chlorite-chalcopyrite ores are -1.4 to -1.5, -2.01 to 0.41, -1.15 to 0.75, and -0.8 to 1.58, respectively, while the 18OSMOW values are 8.94–10.42 The C-O isotope of calcite from the Hongguleleng deposit suggests that saltwater is a key fluid in ore production, and that changed seawater interacts substantially with the host rock. The presence of hydrothermal magnetite in the quartz-magnetite stage and chlorite in the ore producing stages indicates that temperature drops from early to late. High Zn and Pb concentrations in pyrite over four stages, with generally steady levels, suggest a high Zn and Pb content in fluid. Cu concentrations in the four phases of pyrite in the Hongguleleng deposit are decreasing, indicating that Cu concentrations in the ore forming fluid are decreasing from early to late stage. Based on the facts presented above, we argue that this deposit is a Manto-type deposit with modified saltwater driving forces. West Junggar, West Junggar, West Junggar, West Junggar, West Junggar Manto-type Hongguleleng Magnetite, chlorite, and pyrite electron microprobe analysis Cu deposit C-O isotope S-Pb isotope Ore formation.
Author(S) Details
Jinheng Sun
Key Laboratory of Seismic and Volcanic Hazards, Institute of Geology, China Earthquake Administration (CEA), Beijing 100029, China and Jilin Changbaishan Volcano National Observation and Research Station, Institute of Geology, China Earthquake Administration (CEA), Beijing100029, China and Key Laboratory of Mineral Resources, Chinese Academy of Sciences, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box, Beijing 100029, P.R. China and University of Chinese Academy of Sciences, P.O. Box, Beijing 100049, P.R. China and Hebei Key laboratory of Geotechnical Engineering Safety and Deformation Control, Hebei University of Water Resources and Electric Engineering, Hebei, 061001, China.
Ping Shen
Key Laboratory of Mineral Resources, Chinese Academy of Sciences, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box, Beijing 100029, P.R. China and University of Chinese Academy of Sciences, P.O. Box, Beijing 100049, P.R. China.
Hongdi Pan
The School of Earth Science and Resource, Chang’an University, P.O. Box, Shanxi Xi’an, 710054, P.R. China.
Changhao Li
Key Laboratory of Mineral Resources, Chinese Academy of Sciences, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box, Beijing 100029, P.R. China and University of Chinese Academy of Sciences, P.O. Box, Beijing 100049, P.R. China.
Ge Ma
Key Laboratory of Mineral Resources, Chinese Academy of Sciences, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box, Beijing 100029, P.R. China and University of Chinese Academy of Sciences, P.O. Box, Beijing 100049, P.R. China.
Wenguang Li
Key Laboratory of Mineral Resources, Chinese Academy of Sciences, Institute of Geology and Geophysics, Chinese Academy of Sciences, P.O. Box, Beijing 100029, P.R. China and University of Chinese Academy of Sciences, P.O. Box, Beijing 100049, P.R. China.
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