华容隆起及周缘电性结构地质认识

Electrical Structure and Geological Cognition of Huarong Upheaval and Periphery

华容隆起的主要原因是发生在印支晚期的推覆构造运动和岩浆侵入(或岩体)上隆。由于推覆运动,高阻的元古代地层覆盖在中、古生代的沉积地层之上;燕山期构造运动,岩浆的侵入和混合岩化作用,使得该区上隆,上覆地层遭到剥蚀,在地表出露区表现为一隆起带。华容地区大地电磁测深获得的深部电性结构分析结果表明,在华容隆起及北缘地区存在中古生界的沉积地层,是进行海相油气勘探的有利区带。

Huarong upheaval was mainly caused by nappe tectonic movement and rock mass uplift in late Indosinian. Thrust movement made proterozoic era formation overlay mesozoic --paleozoic sedimentary formation while Yans- hanian tectonic movement made Huarong area go up and overlaying information eroded due to magmatic invasion and migmatization, showing a uplifted zone. The analysis of deep electrical structure acquired by magnetotelluric sounding in Huarong area shows that there exists mesozoic--palaeozoic sedimentary formation in Huarong upheaval as well as northern marginal area, favorable zones for marine oil--gas exploration.