中国地质异常  

GEOLOGIC ANOMALY OF CHINA

作　　者：赵鹏大[1] 王京贵[1] 饶明辉[1] 李浩昌[1] 

机构地区：[1]中国地质大学,华东地质学院地质系

出　　处：《地球科学（中国地质大学学报）》1995年第2期117-127,共11页Earth Science-Journal of China University of Geosciences

基　　金：国家自然科学基金

摘　　要：地质异常是在成分结构、构造或成因序次上与周围环境有着明显差异的地质体或地质体组合。依据地质异常分布范围及其圈定标志，可将其分为５级：全球性地质异常、区域性地质异常、局部性地质异常、小型地质异常及显微地质异常。地质异常的圈定方法包括地壳升降系数（Ｇ值）法、地质复杂系数（Ｃ值）法、熵（Ｈ值）法、地质相似系数（Ｓ值）法及地质关联度（Ｒ值）法，作者又从全球角度出发，结合中国的地质特点，进一步阐述了中国地质异常的特点。中国地质异常（１１个区域性地质异常带和３２个主要的局部性地质异常区）由于受欧亚板块、太平洋板块和印度洋板块的影响，均分布在块状对称弧大地构造体系之间的边界上或其内的东、西翼外褶皱带及东、西翼内褶皱带之中，具有在空间上成带分布、时间上集中出现的特点，从而控制了中国大陆各种矿产的产出。实践证明，地质异常理论对寻找大型、特大型及超大型矿床具有重要的指导意义。The geologic anomaly is a geologic body or geologic body combination different from its adjacent settings in composition, texture, structure and genetic sequence. According to the distribution area and delimitation markers, the geologic anomaly can be classified as global geologic anomaly, regional geologic anomaly, local geologic anomaly, small-scale geologic anomaly and micro-geologic anomaly.The methods for delimitation of geologic anomaly include crustal elevation-subsidence coefficient (G value) determination, geologic complicated coefficient (C value) determination,entropy (H value) determination,geologic similarity coefficient (S value) determination and geologic correlation (R value) coefficient determination.As the effect of motions of Eurasian, Pacific and Indian plates, the Chinese geologic anomalies, most being Paleozoic in age and including 11 regional ones and 32 main local ones, are distributed in strip on the margin or the outer and inner folded zone in the east and west limbs of the block symmetricarc, controlling the distribution of various minerals in China. The geologic anomaly theory is of important significance in searching for the larpe, super-larpe and very large ore deposits.China.

关 键 词：地质异常 大地构造体系 锡矿床 成矿 

分 类 号：P618.440.5[天文地球—矿床学]