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引用本文:刘啟能,周小栋,苏小岩,何玉良,郭振. 河南省刘老湾地区地质、物化探特征及找矿前景分析[J]. 中国地质, 2018, 45(2): 392-407.
LIU Qineng,ZHOU Xiaodong,SU Xiaoyan,HE Yuliang,GUO Zhen. An analysis of geological, geophysical and geochemical characteristics and prospecting potentiality of the Liulaowan area in Henan Province[J]. Geology in China, 2018, 45(2): 392-407(in Chinese with English abstract).
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河南省刘老湾地区地质、物化探特征及找矿前景分析
刘啟能1, 周小栋2, 苏小岩1, 何玉良1, 郭振3
1.河南省地质调查院, 河南 郑州 450001;2.福建省地质调查研究院, 福建 福州 350001;3.河南省地质科学研究所, 河南 郑州 450001
摘要:
河南省刘老湾地区位于大别造山带北麓,南临梅山-龟山区域断裂带,西邻燕山晚期的商城花岗岩体。通过1:5万水系沉积物测量工作,在区内圈定了以Au、Ag、Cu、Pb、Zn为主要元素的综合异常,其中Au异常浓集中心明显,规模大,与各元素套合好。1:5万地面高磁异常明显,且与化探异常吻合较好。通过大比例尺地质、物化探综合剖面对物化探异常进行查证,圈出多个Au土壤高值异常段,并伴有高极化、低电阻率异常。本文对该区地质、物化探异常进行了详细剖析,分析了成矿地质条件,认为在中酸性岩体和胡油坊组的接触带、北西西向的断裂构造是找矿的有利部位;在土壤Au高值异常带,正负磁场突变,高级化率、低电阻率的地段,找矿前景较好。
关键词:  物化探  找矿前景  金矿  刘老湾  大别山
DOI:10.12029/gc20180213
分类号:P622;P631;P632
基金项目:中国地质调查局项目“中条-熊耳山成矿区地质矿产调查”(DD20160043)资助。
An analysis of geological, geophysical and geochemical characteristics and prospecting potentiality of the Liulaowan area in Henan Province
LIU Qineng1, ZHOU Xiaodong2, SU Xiaoyan1, HE Yuliang1, GUO Zhen3
1.Geological Survey Institute of Henan Province, Zhengzhou 450001, Henan, China;2.Fujian Institute of Geological Survey, Fuzhou 350013, Fujian, China;3.Institute of Geological Sciences of Henan Province, Zhengzhou 450053, Henan, China
Abstract:
Liulaowan area is located on the northern piedmont of the Dabie orogenic belt in Henan Province, neighboring MeishanGuishan regional fault in the south and the Yanshanian Shangcheng granite body in the west. Geochemical anomalies dominated by Au, Ag, Cu, Pb, Zn were delineated on the basis of 1:50000 stream sediment survey. The Au geochemical anomalies are large in size, and have obvious concentration centers and good element combinations. High-value magnetic anomalies are consistent with the geochemical anomalies. The authors carried out anomaly verification work through measuring the geological, geophysical and geochemical prospecting sections. The authors delineated multiple high-value Au soil anomalies, accompanied by highly intensified and low resistance anomalies. In this paper, based on the detailed and contrastive analysis of the geological, geophysical and geochemical anomalies as well as metallogenic conditions in the area,consider that the favorable parts of prospecting are contact zone of intermediate-acid pluton and Huyoufang Formation, NWW faults structural; there are better prospecting potential in the zones of Au high-anomaly, the part of the mutation of positive and negative magnetic anomaly, the high polarizability and the low resistivity.
Key words:  geophysical and geochemical prospecting  prospecting potential  gold deposits  Liulaowan  Dabie Mountain