水系沉积物地球化学"弱小"异常研究——以嵩县幅Au元素异常为例
Study on'weak'anomaly of geochemical exploration by method of the anomaly threshold in geological subarea——Take the anomaly of Au element in Songxian,Henan Province as an example
王世权 1叶萍 2谭和勇 1陈俊魁 1霍清华1
作者信息
- 1. 河南省地质研究院,河南 郑州 450001
- 2. 河南省地质科学研究所有限公司,河南 郑州 450001
- 折叠
摘要
传统的化探数据处理方法全区常采用统一异常下限圈定异常,存在将异常扩大或者忽略"弱小"异常的缺点,笔者在河南省嵩县地区采用统一的异常下限圈定1∶5万水系沉积物测量综合异常,发现区内Au异常弱小、零散、规律性差.通过采用地质子区异常下限衬值法对区内化探数据重新处理,发现在研究区内存在多个"弱小"异常,这些异常沿主构造方向大致断续分布,具有一定的规律性.通过对"弱小"异常开展查证工作,最终在坡根、七峰山等地发现了多个金矿(化)体.证明在高背景地球化学异常地区采用地质子区异常下限衬值法圈定化探异常并指导找矿具有良好效果,研究成果可为下一步地质找矿工作提供依据.
Abstract
Songxian area is located in Waifangshan upfaulted belt,which is in an important molybdenum-gold metallogenic belt in the southern margin of North China Block.The anomaly of Au element in the study area has a high background value,and the unified anomaly lower limit is adopted to delineate the comprehensive anomaly measured by 1∶50,000 stream sediment.The Au element in the study area is unusually weak,scattered and irregular.Through the reprocessing of geochemical data by using the lower limit contrast method of anomalies in geological sub-areas,it is found that there are several weak and weak Au anomalies in the area and they are distributed discontinuously along the main tectonic direction.Au element anomaly verification work of'weak',Finally,several gold deposits(mineralization)bodies were discovered in Pogen and Qifengshan,in the high background geochemical anomaly areas using geological area threshold contrast method delineated geochemical anomalies and guide the prospecting work has good effect,the research achievenent for further geological prospect-ing work have provided the certain basis.
关键词
外方山断隆/综合异常/异常下限衬值法/"弱小"异常/地球化学异常/嵩县地区Key words
Waifangshan upfaulted belt/composite anomaly/method of the anomaly threshold/'weak'anomaly/geochemical anomaly/Songxian area引用本文复制引用
基金项目
&&(121201004000160901-18)
河南省地质研究院科研项目(2023-903-XM007-KT01)
出版年
2024
NETL
NSTL
万方数据