摘要
介绍在东经 114°～ 12 0°和北纬 39°0 0′～ 4 2°30′的范围内岩石极化率研究的成果。数值统计结果显示 ,798件沉积岩的平均极化率为 2 .4 0 % ,1149件火成岩的极化率为 2 .99% ,4 36件变质岩的极化率为 3.5 9% ,因此 ,变质岩是本区较好的金属矿矿源。空间分布上 ,与沉积作用密切相关的煤矿主要分布在沉积岩高极化率地区 ,变质铁矿主要分布在变质岩高极化率地区 ,内生金矿则主要分布在火成岩高极化率地区。因此认为 ,主要矿产地的分布与极化率高值区的分布在空间上大体一致 ,岩石极化率反映了矿源物质的总体背景。
This paper describes regional rock chargeability data from the area at 114°～120° east longitude and 39°00′～42°30′ northern latitude. The average chargeability value of 798 sedimentary rock specimens is 2.4%, that of 1 149 igneous rock specimens is 2.99%, and that of 436 metamorphic rock specimens is 3.59%, which implies that the metamorphic rock might be the source of metallic ore deposits. In spatial distribution, coal fields are developed in the anomalies of high chargeability sedimentary areas; metamorphic iron deposits occur in the anomalies of high chargeability metamorphic areas; endogenic gold deposits are found in the anomalies of high chargeability igneous areas. On the whole, the main ore fields are consistent with areas of high chargeability anomalies.
出处
《物探与化探》
CAS
CSCD
2001年第5期383-387,共5页
Geophysical and Geochemical Exploration
基金
中国地质科学院地质大调查项目 (DK990 2 0 5 7)
关键词
岩石
极化率
矿源
矿床远景区
河北
沉积岩
火成岩
Northern Hebei Province
rock
chargeability
source of ore
prospect area
