湖南城步地区重力异常的初步研究

A PRELIMINARY STUDY OF GRAVITY ANOMALIES IN CHENGBU AREA,HUNAN PROVINCE

介绍了城步地区重力异常数据处理的几种方法,分析了重力异常及其位场转换后的特征,对重力异常进行了初步解释推断。根据重力异常特征,推断了10条断裂,圈定了兰蓉—谭家坳—照面山、黄坪、洞背和扛口等4处半隐伏岩体;结合地质地球化学综合信息,提出了4处找矿有利地段。通过半定量反演,认为:湖南省内苗儿山岩体与越城岭岩体以及五团岩体与苗儿山岩体在深部不相连。

This paper has described several data-processing methods for the gravity anomaly in Chengbu area, analyzed the gravity anomaly and its characteristics after the location-field transformation, given a preliminary explanation and deduction of the gravity anomaly and a tentative prognosis of the favorable ore prospecting sectors. According to the characteristics of the gravity anomaly and the geological and geochemical information, 10 faults and four semi-concealed rock bodies （Lanrong-Tanjiaao-Zhaomianshan, Huangping, Dongbei and Kangkou） were deduced, which can be regarded as the favorable ore-prospecting sectors. Based on the half-quantified inversion, it is concluded that the Neimiaoer rock body and the Yuechengling rock body in Hunan Province are not connected in the depth, and the Wutuanshan rock body and the Miaoershan rock body are not linked with each other either.