摘要
前陆盆地是一种较为特殊的沉积盆地,是位于造山带前沿和相邻克拉通之间的沉积盆地,是在板块会聚或碰撞条件下,靠近克拉通(或大陆)一侧形成的盆地.我们通过MT测深结果分析,直观地看到了松辽盆地西缘存在着前陆盆地的电性异常特征.本文通过MT测深结果,结合构造动力学环境、地质构造现象分析,认为松辽盆地西缘可能存在前陆盆地(松辽西前陆盆地).这个前陆盆地的存在,可以合理地解释大杨树盆地与其东部松辽盆地主体深度上的重大差异;可以解释利用传统的断陷盆地无法解释的松辽盆地中"凹中隆"的问题;无疑会对目前的研究理论注入新的内涵,从而更有助于指导松辽盆地及其外围的油气勘探与开发.
Foreland basin is a kind of relatively special sedimentary basin, is located at the frontiers of Orogenic belt and Craton between adjacent sedimentary basin, is under the condition of the convergence and collision between, near the Craton （or continent） on one side of the formation of the basin. We through MT sounding results analysis, intuitively see the west margin of the Songliao basin there is abnormal electrical characteristics of foreland basin. Through MT sounding results, combined with the tectonic dynamics environment, the geological structure phenomenon analysis, think possible foreland basin west margin of the Songliao basin, Songliao west foreland basin）. The existence of foreland basin, can reasonably explain the big poplar on the depth of the eastern basin and Songliao basin subject of significant differences; Can explain the use of traditional fault basin can＇t explain ＂lung＂ in the concave problem in Songliao basin; Will no doubt inject new connotation of the present study theory, so as to better guide the Songliao basin and its peripheral oil and gas exploration and development.
出处
《地球物理学进展》
CSCD
北大核心
2013年第3期1329-1335,共7页
Progress in Geophysics
基金
中国地质调查局项目(基[2011]02-22-16)资助
关键词
MT
松辽盆地西缘
龙江盆地
前陆盆地
MT, Songliao basin west margin, Longjiang basin, foreland basin
