| 福建紫金山矿田罗卜岭斑岩型铜钼矿地球化学立体探测示范 |
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| 关键词:the demonstration of geochemical stereoscopic exploration 3D model porphyry Cu-Mo deposit Luoboling Zijinshan |
| 基金项目:国家重点研发计划项目“穿透性地球化学勘查技术”(编号: 2016YFC0600608) |
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| 摘要: |
| The Demonstration of 3D Geochemical Exploration in the Luoboling Porphyry Cu-Mo Deposit, Zijinshan Orefield, Fujian Province |
| Located in the northeast of the Zijinshan orefield, the Luoboling deposit is generally a buried porphyry Cu-Mo deposit associated with the late Mesozoic granodioritic porphyry. In the deposit, major Cu-Mo orebodies, with the ore mineral assemblage of chalcopyrite-molybdenite, occur in the chlorite-phyllic and weak potassic-phyllic alteration zones. The minor transitional orebodies, characterized by the digenite-covellite- molybdenite assemblage, are hosted in the advanced argillic alteration zone. The primary halo geochemical 3D model of the Luoboling deposit shows that the trace elements have the characteristics of zoning. Low temperature element Au and high temperature element combination W, Sn, Bi are distributed over the orebody, while medium and low temperature elements Pb, Zn and Ag are distributed between the elements of Cu and Mo. The intuitive vertical zoning of elements is roughly divided into (As, Sb, Hg)-(W, Bi, Sn)-Ga-Au, Ba-Cu, Ag-Pb, Zn-Mn-Mo, with leading edge halo elements and oxide combination being As, Sb, Au, Ga and Al2O3. The near-ore elements are Ag, Pb and Zn, and the tail halo elements are absent. Cu and Mo can be directly used as the indicator elements for prospecting, whereas Au, Ag, Pb, Zn, As, Sb, Ga, Ba and Mn can be used as the indirect indicator elements. K2O positive anomaly in the depth of the deposit and Al2O3 negative anomaly can be used as the important prospecting indicators for porphyry Cu-Mo deposits. These metallogenic rules are important for the exploration of the concealed porphyry orebodies in the depth and the periphery of the Zijinshan orefield. |
| LAI Xiao-dan,ZHANG Jin-zhang,QI Jin-ping,WANG Qian-jie,YANG Ze-jun.2020.The Demonstration of 3D Geochemical Exploration in the Luoboling Porphyry Cu-Mo Deposit, Zijinshan Orefield, Fujian Province[J].Acta Geoscientica Sinica,41(6):963-976. |
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