ISSN 1006-3021 CN11-3474/P
Published bimonthly started in 1979
投稿时间:2019-10-27  修订日期:2019-11-22
关键词:Shangdong province  Jiaojia gold metallogenic belt  QuJia gold deposit  Halo  Geochemical zoning
杨德平 山东省地质科学研究院 
于学峰 山东省地质科学研究院  
朱学礼 山东黄金地质矿产勘查有限公司  
熊玉新 山东省地质科学研究院  
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The Study of Geochemical Zonation of Primary Halos in the Qujia Gold Deposit, Laizhou, China and Geological Significance.Earth Science,():-YANG Deping,YU Xuefeng, ZHU Xueli,XIONG Yuxing, SHU Lei,SONG Yingxin, LIU Pengrui, CHI Naijie.
      Qujia gold deposit is located in the middle of Jiaodong Jiaojia metallogenic belt. It is the deep extension of Xincheng gold deposit and Matang gold deposit. The ore body occurs at a depth of 300~1300m and the exploration degree is up to the exploration level. Through the analysis and study of 34 elements in 32 borehole core samples in the area, it is found that multiple elements migrate into halos along the axial direction and the vertical direction,of the ore body within this depth range, which is of great significance for the study of penetrating geochemistry and primary halos prospecting mechanism. At the same time, it is found that the axial and vertical diffusion of metallogenic elements in the metallogenic belt is affected by a variety of factors, including ore body metallogenic location, element concentration in the metallogenic hydrothermal fluid, temperature and pressure of hydrothermal fluid, chemical activity and permeability of surrounding rocks, etc., which are complex in spatial distribution. The high concentration zone of primary halo is mainly distributed along the fault alteration zone.The axial component zonation determined by Gregorian method and barycenter is in accordance with the general law, and the superposition of head and tail halo element in the deep part of the axial direction indicates that there are still hidden ore bodies in the deep part, which is consistent with the exploration results of the adjacent Zhaoxian exploration area in the west. The vertical component zonation from shallow to deep is different. The elements with strong vertical migration ability and easy concentration in the shallow part are Se, Cd, Mo, Hg, Bi, S, F, Cu, Ag. The elements with strong concentration near the mineralization belt are Sb, As, Au, W, etc. When multiple elements in the shallow reach K2O≥4.57×10-2,Au≥0.8×10-9,Ag≥0.057×10-6, Cu≥2.5×10-6, Bi≥0.08×10-6,Hg≥17×10-9,S≥0.0583×10-2,Mo≥0.74×10-6,W≥0.55×10-6, Indicates that gold ore bodies are likely to be found in deep Hg.Ag/As.W, Bi.Hg/As.Au index can be used to judge the buried depth of the gold ore body.
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