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[an error occurred while processing this directive]Enrichment Regularities of Au Element in T4 Orebody of the Paishanlou Gold Deposit in Liaoning Province and Its Indicative Significance for Prospecting
Received date: 2020-04-06
Revised date: 2021-05-22
Online published: 2021-07-14
The Paishanlou gold deposit is located in the gold province of northern margin of North China Craton,which is the third largest gold province in China.The deposit is mainly hosted in metamorphic rocks of the Jianping Group of Archean and it is structurally controlled by two sets of ductile shear zones.Both the Paishanlou gold deposit in Liaoning Province and Hetai gold deposit in Guangdong Province were firstly been confirmed as ductile shear zone type gold deposits in China.The main orebody T4 in the mining area is controlled by the northeast trending ductile shear zone,and the host rocks are the biotite-plagioclase mylonite and felsic mylonite from Late Archean Jianping Group.The orebody lies in the most strongly deformed rocks in the ductile shear zone,and its hanging wall is dolomitic mylonite.Previous studies have shown that dolomitic mylonite plays a role as a geochemical barrier in the mineralizing process.The Yanshanian granite intruded into the ore-bearing Jianping Group.In this study,by summarizing the geological characteristics and main ore-controlling factors of the Paishanlou gold deposit,it is believed that the ductile shear zone in the area is a rock-controlling and ore-controlling structure,which controls the spatial distribution of the ore-bearing mylonite and gold ore bodies.Granite intrusion causes thinning of ore-bearing rocks which reduced prospecting space.The grade and thickness data of the ore-body T4 were collected in this study.By using the Surfer software to compile the grade and thickness contour maps,the distribution characteristics of the grade and thickness of the ore-body T4 were analyzed.It is considered that the grade and thickness of the ore-body T4 from the east end near the surface to the deep end of the west end can be divided into three obvious gradient zones,and the grade and thickness gradually decrease.The thickness and grade of the orebody shows spatially high consistency.According to the gold grade contour map,we judge that the orebody is leaning to the south and west,with a side leaning angle of 53°.It indicates that the thickness and grade of the orebody T4 in the southwest of the deep have a significant decrease.Therefore,there is no great potential to find economically important orebody in the southwest of the deep.It’s proposed to analyze and research the prospecting potential of other ductile shear zones in the mining area.
Yanbing LIU , Hailang QU , Boxin HU , Guang MIAO , Junwei TENG , Changsheng WU , Ruipeng WANG . Enrichment Regularities of Au Element in T4 Orebody of the Paishanlou Gold Deposit in Liaoning Province and Its Indicative Significance for Prospecting[J]. Gold Science and Technology, 2021 , 29(3) : 325 -333 . DOI: 10.11872/j.issn.1005-2518.2021.03.070
http://www.goldsci.ac.cn/article/2021/1005-2518/1005-2518-2021-29-3-325.shtml
在项目研究过程中,辽宁排山楼黄金矿业有限责任公司相关领导和科技人员给予了大力支持和帮助,成文过程中得到了中国地质大学(北京)张静教授的悉心指导,匿名审稿专家对论文修改提出了非常详细的宝贵意见,在此一并表示诚挚感谢!
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