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金属矿山 ›› 2020, Vol. 49 ›› Issue (07): 122-129.

• 地质与测量 • 上一篇    下一篇

西藏格玛铅锌矿区地质特征及综合找矿模式

蔡仲明,杨骁,楚卢凯,杨瑞西,岳国利   

  1. 1. 河南省地质科学研究所,河南 郑州 450001;2. 河南省金属矿产成矿地质过程与资源利用重点实验室,河南 郑州 450001;3. 河南省航空物探遥感中心,河南 郑州 450053;4. 河南省地质调查院,河南 郑州 450001
  • 出版日期:2020-07-15 发布日期:2020-08-21
  • 基金资助:
    中国地质调查局地质调查项目(编号:1212010818063)

Geolgoical Characteristics and Integrated Prospecting Mode in Gema Pb-Zn Mining Area,Tibet

Cai Zhongming,Yang Xiao,Chu Lukai,Yang Ruixi,Yue Guoli   

  1. 1. Henan Institute of Geosciences,Zhengzhou 450001,China;2. Henan Key Laboratory for Metallogenic Geological Process of Metallic Minerals and Resource Utilization,Zhengzhou 450001,China;3. Henan Aero Geophysical Survey and Remote Sensing Center,Zhengzhou 450053,China;4. Henan Institute of Geological Survey, Zhengzhou 450001,China
  • Online:2020-07-15 Published:2020-08-21

摘要: 河南省地质调查院在国土资源大调查中,在西藏念青唐古拉山地区发现并评价了拉屋铜锌多金属矿、尤卡朗银铅矿、亚贵拉铅锌矿等一大批铜铅锌多金属矿(区)点。为扩大找矿成果,对格玛村附近1∶5万水系沉积物测量10-乙1铅锌银多金属异常进行了查证。通过土壤化探、磁法测量缩小找矿靶区;地质路线填图确定(推断)矿化体位置;激电中梯对隐伏矿体进行追索;地质槽探工程揭露矿体;垂直于矿化带布设激电测深剖面,确定极化体空间分布形态;最后进行地质钻孔验证,在研究区找出了一个中型铅锌银多金属矿床。总结了在自然条件恶劣的古露—尤卡乡铅锌银成矿带内,发现、评价铅锌银多金属矿床的找矿模式,对于类似区域找矿勘探研究具有一定的参考价值。

关键词: 铅锌银多金属矿, 水系沉积物测量, 槽探, 激电中梯, 激电测深, 找矿靶区

Abstract: In the great investigation of territorial resources,a large number of copper,lead and zinc polymetallic ore (area) points,such as Lawu copper-zinc polymetallic ore,Youqialang silver-lead ore and Yaguila lead-zinc ore etc..were found and evaluated by Henan Institute of Geological Survey in Nyenchen Tanglha Mountain Area in Tibet.In order to expand the prospecting achievements of the area,the 10-乙1 Pb-Zn-Ag polymetallic anomaly of 1∶500 00 stream sediments survey around Gema Village was verified.The prospecting target area was reduced by soil geochemical and magnetic survey;the location of mineralized bodies was delineated (inferred) by geological route mapping;the hidden orebodies were tracked by IP intermediate gradient measurement method;the orebodies were revealed by exploration trenching engineering;the spatial distribution of polarized body was determined by arranging IP sounding section perpendicular to the mineralization zones;finally,a medium-sized Pb-Zn polymetallic deposit was found in the study area by geological drilling verificaiton.The prospecting mode of finding and evaluating Pb-Zn polymetallic deposit in Gulu-Youkaxiang Pb-Zn-Ag metallogenic belt with adverse natural conditions was summarized.It has certain reference value for the prospecting and exploraiton study in similar areas.

Key words: Pb-Zn-Ag polymetallic deposit, Stream sediment survey, Trenching, IP intermediate gradient, IP sounding, Prospecting target area