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ning: 18.0pt; mso-bidi-font-weight: bold" lang=EN-US>Petrogenetic and Ore-Forming Processes of Huangshandong Cu-Ni Sulfide Deposit in Hami, Xinjiang

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摘要

ning: 0pt" lang=EN-US>The Huangshandong Cu-Ni sulfide deposit is hosted by mafic-ultramafic rocks composed of peridotite, norite, gabbro and diorite in at least four intrusive rock assemblages. Mineral chemistry and whole-rock major and minor elements, REE and PGE compositions suggest that primitive mantle-normalized trace element patterns show significant depletion of such high field strength elements as Nb, Ta, Zr and Th as well as Cr, and enrichment of Sr and some large ion lithophile elements; (La/Yb)N=1.08ning: 0pt; mso-ascii-font-family: ’Times New Roman’">~ning: 0pt" lang=EN-US>2.70 and δEu=0.50ning: 0pt; mso-ascii-font-family: ’Times New Roman’">~ning: 0pt" lang=EN-US>2.57. The Cu/Pd and Ti/Pd ratios of ore-bearing rocks are higher than the values of primitive mantle. The above evidence indicates that different types of rocks were produced by fractional crystallization of a high MgO basaltic magma at depth.  

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