中国工程科学Issue(2)：85-96,12.
喀拉通克与金川铜镍硫化物矿床地质地球化学特征对比及其意义
A comparison of geology geochemical characteristics between the Kalatongke and the Jinchuan Cu-Ni sulfide deposit and its significance
摘要
Abstract
According to the analysis and comparison with the content and geochemical char-acteristics of major and trace element from Cu-Ni sulfide deposits between Kelatongke and Jin-chuan,meanwhile,combing different tectonic setting and rock series of these two types of de-posits,we study their magmatic and mineralization processes. The results show that major ele-ment of Kalatongke belongs to the tholeiitic basalt system;incompatible trace element presents as enrichment of large ion lithophile elemen(LILE) and depletion of high field strength element (HFSE),suggesting that they are derived from the continental crust;the rare earth element (REE) presenting rich in light rare earth element (LREE),and there is no obvious Eu anoma-lies,Sr and Nd isotopes indicates that the magma source is depleted asthenosphere mantle. Ma-jor element of Jinchuan deposit belongs to the tholeiitic basalts and mid ocean ridge basalt (MORB) system;incompatible trace element presents as enrichment of LILE,depletion of HFSE,showing the magma suffers from contamination of crust materials or there are materials of subducted oceanic crust in the source;the ratio of N(La)/N(Nb) and N(Zr)/N(Nb) indicating its source is derived from EMI mantle;the REE presenting enriched in LREE,the ratio of N(La)/N(Yb),N(La)/N(Sm) and N(Gd)/N(Yb) presenting enriched in LREE;and there is no ob-vious Eu anomalies,Sr and Nd isotopes declaring magma derived from enriched mantle. And we also predicted the magma conduit and mineralization potential of these two ore deposits by 3D geological modeling,hoped it will useful for later period exploration.关键词
岩浆铜镍硫化物矿床/岩浆源区/地壳混染/微量元素/岩石系列/三维地质建模/喀拉通克/金川Key words
magmatic Cu-Ni sulfide deposit/magma source/crustal contamination/trace element/rock series/3D geological modeling/Kalatongke/Jinchuan分类
天文与地球科学引用本文复制引用
代俊峰,宫磊,樊立飞,王勇,赵斌斌..喀拉通克与金川铜镍硫化物矿床地质地球化学特征对比及其意义[J].中国工程科学,2015,(2):85-96,12.基金项目
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