ISSN 1006-3021 CN11-3474/P
Published bimonthly started in 1979
张家口北部铅锌银多金属矿床区域剥蚀程度分析
  
关键词:degree of denudation of deposit  degree of rock weathering  Pb-Zn-Ag polymetallic deposit  north of Zhangjiakou
基金项目:河北省自然资源厅基金项目(编号: 2011055548; 2013045650)
作者单位E-mail
李随民 河北地质大学 smli71@163.com 
焦雪红 河北地质大学  
郝花金 河北省矿产资源储量研究中心  
韩腾飞 河北省地质调查院  
孙志伟 河北省地质调查院  
李宾 河北省地质调查院  
李紫烨 河北省地矿局第六地质大队  
邢欢 河北省地矿局第六地质大队  
韩玉丑 河北省地质调查院  
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摘要:
An Analysis of the Denudation Degree of Pb-Zn-Ag Polymetallic Deposits in the North of Zhangjiakou Area
      The northern part of Zhangjiakou area is an important area with Pb-Zn-Ag polymetallic deposits in Hebei Province. Because the mineralization process and ore-controlling factors of polymetallic deposits are similar in this area, the mineralization should be related to the Yanshanian acid small rock body that invaded the metamorphic rocks under the volcanic cover, so that the geochemical anomalies can be compared. Geochemical anomalies have overall unbiased characteristics to the position of the polymetallic ore deposit, factor analysis of geochemical surveying data shows that correlation of the ore-forming elements does not change from primary halos in stream sediments, and hence researchers can use primary halos of these elements to distinguish the denudation degree of the orebody so as to analyze regional denudation extent of the polymetallic deposit. With the Caijiayin polymetallic deposit as an example, the authors investigated the parameter of (Bi+V+Ba)/(B+Sb+U) and (U/Th) ratios which can effectively identify the denudation extent. The results of geochemical surveying data analysis indicates that the polymetallic deposits are widely distributed all over the study areas which have different degrees of denudation. The cumulative NAP method shows that the denudation degree of the Lanyan polymetallic deposit is the highest and that of Caijiaying and Qingyanggou deposit is significantly reduced. The polymetallic deposits are mostly distributed in the area of metamorphic crystal basement and its periphery where there exists high degree of rock weathering. As the weathering degree of the rocks of volcanic rock cover area is low, the polymetallic deposits which lie in the underlying metamorphic rocks are mostly distributed in the concealed to semi-concealed state, these areas should be the new targets in search for polymetallic deposits.
LI Sui-min,JIAO Xue-hong,HAO Hua-jin,HAN Teng-fei,SUN Zhi-wei,LI Bin,LI Zi-ye,XING Huan,HAN Yu-chou.2021.An Analysis of the Denudation Degree of Pb-Zn-Ag Polymetallic Deposits in the North of Zhangjiakou Area[J].Acta Geoscientica Sinica,42(4):537-544.
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