共轭节理研究及区调中的应用——以江西省赣南地区1∶5万青塘幅为例
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摘要
共轭节理研究是用来探讨构造应力场的一种可靠方法,它有助于了解构造活动机制和构造运动的发展史,对于矿产预测、水文工程地质及地震预报均具有重大意义,且对加深图幅地质构造研究、成岩成矿分析和提高图幅质量起重要作用。本文通过对1∶5 万青塘幅共轭节理的详细研究、统计、分析, 从而得出加里东期构造应力场主压应力为近EW 向, 海西—印支期为NW- SE向, 燕山早期为NWW- SEE向, 燕山晚期为NNW-SSE 向,与中国东部区域构造应力场一致,其构造机制为太平洋板块与亚洲板块相互作用和演化。
The study of conjugate joints is a reliable method used for discussing the structural stress field,which conduces to the understanding of the tectonic activity mechanism and the development history of tectonism. It is therefore of great significance in the prognosis of mineral resources,in hydrogeology and engineering geology, as well as in earthquake forecast.This study plays a vital role in the understanding of the geological structures,the magmatism and the mineralization of the area and in improving the quality of this mapping. Through detailed study,statistical treatment and analysis of conjugate joints during 1∶50000 regional geologic mapping in the Qingtang area,it has been brought to light that the orientation of compressive principal stress of the structural stress field was nearly EW in the Caledonian Period,NW-SE in the Hercynian-Indosinian Period, NWW-SEE in the Early Yanshanian Period, and NNW_SSE in Late Yanshanian times, which are in conformity with those of the regional structural stress field in East China. This structural mechanism is a reflection of interaction between, and evolution of, the Pacific Plate and the Asian Plate.
The study of conjugate joints is a reliable method used for discussing the structural stress field,which conduces to the understanding of the tectonic activity mechanism and the development history of tectonism. It is therefore of great significance in the prognosis of mineral resources,in hydrogeology and engineering geology, as well as in earthquake forecast.This study plays a vital role in the understanding of the geological structures,the magmatism and the mineralization of the area and in improving the quality of this mapping. Through detailed study,statistical treatment and analysis of conjugate joints during 1∶50000 regional geologic mapping in the Qingtang area,it has been brought to light that the orientation of compressive principal stress of the structural stress field was nearly EW in the Caledonian Period,NW-SE in the Hercynian-Indosinian Period, NWW-SEE in the Early Yanshanian Period, and NNW_SSE in Late Yanshanian times, which are in conformity with those of the regional structural stress field in East China. This structural mechanism is a reflection of interaction between, and evolution of, the Pacific Plate and the Asian Plate.
引文
[1] 万天丰.古构造应力场[M]. 北京:地质出版社,1988.
[2] 汤经武,杨庆敏.微型计算机在地质构造解析中的应用[M] .武汉: 中国地质大学出版社, 1989.
[3] 江西省地质矿产局. 江西省区域地质志[M]. 北京:地质出版社,1984.
[4] 王鸿祯,杨巍然,刘本培.华南地区古大陆边缘构造史[M]. 武汉:武汉地质学院出版社,1986.
[2] 汤经武,杨庆敏.微型计算机在地质构造解析中的应用[M] .武汉: 中国地质大学出版社, 1989.
[3] 江西省地质矿产局. 江西省区域地质志[M]. 北京:地质出版社,1984.
[4] 王鸿祯,杨巍然,刘本培.华南地区古大陆边缘构造史[M]. 武汉:武汉地质学院出版社,1986.
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