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安徽宁墩地区金钨地球化学异常找矿远景 |
陈富荣 |
安徽省地质调查院,安徽 合肥 230001 |
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ORESEARCH PROSPECTS OF GOLD AND TUNGSTEN GEOCHEMICALANOMALIES IN NINGDUN AREA, ANHUI PROVINCE |
CHEN Fu-Rong |
Anhui Institute of Geological Survey, Hefei 230001, China |
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摘要 宁墩地区金、钨地球化学异常以Au、As、W、Bi元素组合为主,异常套合较好、分带明显,异常强度高、规模大,受北东向
断裂控制。通过水系沉积物加密采样和土壤、岩石剖面测量及路线地质调查,该区存在次生晕异常和原生晕异常,查证方法技术有
效。位于褶皱和断裂构造发育部位的异常,有Au、W等高背景花岗闪长斑岩脉的侵入,物质来源和热源充足,成矿地质条件优越。路
线地质调查发现金矿化体四处,但与该区异常强度和规模不相称,尤其是在破碎带矿化蚀变岩石中,Au、W、Mo成矿元素与As、Sb、
Bi伴生元素含量均较高,该区显示出较好的Au、W、Mo找矿前景。
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Abstract: Geochemical anomalies of gold and tungsten in Ningdun area are dominated by the element association of
AuAsWBi. These anomalies are well coincident with the structural rifting belt. They are characterized by
high intensity, extensiveness, and remarkable zoning, and are evidently controlled by NEtrending faults. Both
secondary and primary anomalies exist in the area, as revealed by highintensity sampling in stream sediments,
soil and rock profile survey and geological investigation across the profile. The inspection method has been proved
to be effective. Anomalies occur in places of numerous folds and rifts, where there exist granodiorite porphyries
with such highbackground elements as Au and W, abundant material sources and heat as well as excellent geological
settings for mineralization. There are four mineralized bodies of gold, but they are not consistent with the
anomalies there in intensity and dimension. In addition, oreforming elements of Au, W and Mo are as high as
associated elements of As and Bi in content in mineralized altered rocks of the rifting belt. All these features
suggest good prospects in search for Au, W and Mo in the area. |
收稿日期: 2009-10-16
出版日期: 2010-04-10
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通讯作者:
陈富荣(1971-), 男, 安徽巢湖人,工程师,长期从事勘查地球化学、环境地球化学调查与研究工作,先后发表论文多篇。
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