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- W2352206716 abstract "The Baiyangping copper-cobalt polymetallic deposit, which occurs as bedded and veined orebodies in fractures with distinct alteration zoning, is located in the continental red clastic rocks of the Lower Cretaceous Jingxing Formation. The study of occurrence of cobalt shows that it exists mainly in its independent mineral-cobaltite and in tennatites and few cobalt-pyrites isomorphically in primary ores, and also in erythrite on the surface of oxidation ore. The composition of and ratio of Co/Ni in cobaltite suggest cobalt ore-formation is related to basic-ultrabasic magma. Although the chondrite-normalized REE patterns of normal rocks, altered rocks, and ores are similar, they are characterized by LREE enrichment, HREE depletion, insignificant Ce-anomalies and significant negative Eu-anomalies. Distinct differences are noticed in the contents and the degree of differentiation of REE, which, we consider, may be ascribed to differences in way and mineral type carrying REE into normal rocks from fluids, and to the different properties between pre-ore-forming fluid and ore-forming fluid, reflecting the difference of ore source at different ore-forming stages. The elements Cu, Co, As, Sb, Bi and Ag are relatively enriched in discolouration altered rocks, carbonatization altered rocks and ores, as compared with the contents of trace elements in normal rocks. The lithophile elements are most enriched in discolouration altered rocks , whereas the sulphophile elements (ore-forming elements) are significantly enriched in carbonatization altered rocks and ores, suggesting wall-rock hosted ores did not provide main ore-forming elements for mineralization, and the main ore-forming elements are derived from mantle-source basic magma. Generally, cobalt metallogenesis may be related to the activity of basic magma derived from the mantle at the Himalayan stage." @default.
- W2352206716 created "2016-06-24" @default.
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- W2352206716 date "2004-01-01" @default.
- W2352206716 modified "2023-09-25" @default.
- W2352206716 title "COBALT ORE-FORMING GEOCHEMISTRY OF THE BAIYANGPING COPPER-COBALT POLYMETALLIC DEPOSIT IN LANPING BASIN, YUNNAN" @default.
- W2352206716 hasPublicationYear "2004" @default.
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