江苏宜兴地区推覆构造的发现及其油气勘探的意义

1976年,笔者在苏南茅山和苏州地区首次提出推覆构造的存在。到了1984年,又在宜兴地区发现了推覆构造。基于野外的调查和分析,将宜兴白泥山—老虎山(东岭涧坞,南山,白泥场),高山—仰峰岕的推覆构造分成两种类型,即褶皱拉铺型和断层拉铺型。文中叙述了逆冲推覆构造中的岩石力学性质,显微超微构造,位错构造和构造地球化学等特征。推覆构造的发现是了解地质构造同油气聚集关系以及了解区域构造的关键。笔者还指出了宜兴推覆构造同油气藏及其分布的密切关系。

A DISCOVERY OF NAPPES AND ITS SIGNIFICANCE OF OIL-GAS EXPLORATION IN YIXING AREA, KIANGSU

In 1976, authors first suggested that there were nappes in Maoshan mountain and Suzhou area, and in 1984 the nappe in Yixing was discovered again. In the basis of field investigation and analysis, nappes at Dongling Jianwu Banichang and Gaoshan Yangfengka are divided into two types, i. e. the fold-nappe and the fault-nappe. In this paper authors have also described the mechanical property of rock, the micro-ultramicrostructure, the dislocation structure and tectonochemistry in thrust-nappe. Recognition of this discovery of nappes offers one of the main keys for deciphering the relationship between tectonics and oil-gas gathering and also for understanding the regional structure. It is sufficient here to point out that thrust-nappes in Yixing area correspond with oil-gas reservoir and its distribution.