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《World Nonferrous Metals》 2017-18
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Heilongjiang Yichun three mountain deposit, basic characteristics and tectonic significance

REN Long;XIE Kai;QU Xue-chen;GUO Wei;ZANG Xin-yong;MU Fu-quan;LOU Yu-lei;The 1st Gold Detachment of Chinese Armed Police Force;China Geological Survey Cores and Samples Center of Land & Resources;  
Through the study of mineralogy of biotite granite mountain, three ore geochemistry and zircon U-Pb chronology, explore its formation mechanism, the original source rocks and tectonic significance. The SHRIMP U-Pb age data show Sanxing mountain emplacement is about 190 Ma, Yichun and other areas(such as the upstream Village) basic period. Three mountain lithology is porphyritic biotite granite two, partial(micro) fine grained porphyritic biotite granite two, containing minerals hornblende, no muscovite, with high SiO_2(71.59%-78.24%), K_2O(2.64%-5.18%), high and low P_2O_5 characteristics, aluminum saturation index(A/CNK) for 1.04-1.16. The enrichment of K, Th, U, Pb, Ti, Nb in different degrees of loss, P, Sr, Eu etc., belong to metaluminous to peraluminous highdifferentiation I type granite; analysis in combination with regional geological background, may indicate the formation of Sanxing mountain and Siberia plate and North China plate after docking extension.
【Fund】: 中国地质调查局地质调查项目12120113072600资助
【CateGory Index】: P613
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