沉积盆地火成构造研究综述

Review of the Basinal Igneous Tectonics

岩浆活动在沉积盆地中是非常广泛的。随着油气勘探领域的扩展,对沉积盆地火成岩及相关构造的研究愈加重要。沉积盆地火成构造是指在沉积盆地中由岩浆侵入或喷发作用形成的岩浆和围岩及上覆层变形构造的总和。当前,利用三维地震数据研究岩席的几何学与侵位机制取得了重要进展,开启了沉积盆地火成构造研究的新时代。三维地震分析是沉积盆地火成构造研究强有力的手段。加强火成构造的研究不仅可以深化对沉积盆地构造的认识,也可以深化对火成构造圈闭的认识,为寻找与火成岩相关的油气藏提供了新思路。

Magmatic activity is widespread in sedimentary basins world-wide.As hydrocarbon exploration spreads to igneous rocks,the understanding of the role of igneous complexes in the basin is becomes increasingly important.Basinal igneous tectonics is defined here as the deformations involving igneous complexes,host rocks and overburden resulted from magma intrusion and extrusion.Recently,the study of geometry and emplacement mechanisms of igneous sills by using 3D seismic reflection data has made great achievements,which has started a new ear of igneous tectonic analysis.Interpretation of 3D reflection seismic data offers a novel approach to the understanding of the fundamental aspects and hydrocarbon implications of basinal igneous tectonics.The research of igneous tectonics is one of the key fundamental problems of structural analysis in sedimentary basins,and is of broad practice prospecting in the petroleum exploration.A better understanding of the igneous rocks will improve our understanding of basinal structures and hydrocarbon traps related igneous rocks,and bring a number of new ideas of hydrocarbon exploration.