西北地质2025，Vol.58Issue(4)：102-117,16.DOI:10.12401/j.nwg.2025043
新疆东天山黄山地区岩浆铜镍矿床特征对比及找矿启示
Comparison of Magmatic Cu-Ni Deposits in Huangshan Area,East Tianshan and Its Implications for Prospecting
摘要
Abstract
The Huangshan area is the one of the most important ore field of nickel in the East Tianshan area and include the Huangshandong,Huangshanxi and Huangshannan magmatic sulfide Ni-Cu deposits.On the basis of the previous research achievements,we discuss the similarities and differences of the magmatic sulfide Ni-Cu deposits in Huangshan area in this paper.The zircon age and geochemistry characteristics show that Huangshan-dong,Huangshanxi and Huangshannan intrusions have the similar magmatic sources.The olivine Fo and esti-mated results indicate that the parental magma of these intrusions is supposed to be high Mg in composition and experienced the early olivine crystallization.The isotope and trace elements data show that the magma of these intrusion was formed by the mixing of a mafic magma derived from a depleted mantle with a granitic melt de-rived from a juvenile arc crust and occurred sulfide segregation in depth.Compared with the Huangshandong and Huangshanxi deposits,the 100%sulfide of the Huangshannan deposit have the higher contents of Ni,Cu,Pt and Pd.The simulated calculation show that the Huangshannan deposit have the higher R factor than Huang-shandong and Huangshanxi deposits,which indicated there are more silicate magmas reacted with the sulfide liquid in the Huangshannan deposit.The high oilvine Fo content and low sulfide Cu/Pd ratio in the Huangshan-nan intrusion indicate the time of olivine fractional crystallization and sulfide segregation is before the Huang-shandong and Huangshanxi deposits.Combined with the profile shapes and cover depth of these intrusions,we suggest that the Huangshannan intrusion can be regarded as magma conduits between magma chamber while the Huangshandong and Huangshanxi intrusions may be the lower part of the magma chambers.The bottom of Huangshan intrusion and the underlying deep magma conduit have experienced multi-stage continuous emplace-ment,recharge,and sulfide accumulation.These processes indicate favorable ore-forming potential,particularly within the structural space created by the slowing down of the deep channel system.关键词
锆石SHRIMP U-Pb年龄/镁铁-超镁铁质岩石/岩浆通道/黄山铜镍成矿带/东天山Key words
Zircon SHRIMP U-Pb age/Mafic-Ultramafic rocks/magma conduit/Huangshan Cu-Ni ore belt/East Tianshan分类
天文与地球科学引用本文复制引用
张愿宁,徐刚,王富贵,段俊,房明举,吴建涛,陆盈颖..新疆东天山黄山地区岩浆铜镍矿床特征对比及找矿启示[J].西北地质,2025,58(4):102-117,16.基金项目
陕西省自然科学基础研究计划(2023-JC-YB-224、2022JM-169),长安大学创新创业训练计划项目(S202410710300),甘肃省地质勘查基金(202201-D15、202302-D01)联合资助. （2023-JC-YB-224、2022JM-169）
