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辽河裂谷是辽东湾裂谷带的陆地部分,位于沈阳至营口以西的狭长地带,西临医巫闾褶皱带,东为辽东隆起,北东40°～45°延伸,长200公里,宽49公里(图1)。本区基底是前震旦系深变质花岗片麻岩,绝对年龄18亿年。震旦亚界在辽河裂谷的西部钻遇,下部是大红峪组石英岩、石英砂岩,上部是高于庄组白云质灰岩;古生界呈东西向分布,在裂谷的东部三界泡构造钻遇,是寒武奥陶系石灰岩;中生代沉积盆地位于裂谷带的东西两侧;新生代裂谷处于古隆起带的顶部。其地质、地球物理特征与世界典型的大陆裂谷相比有许多相似之处。
The Liaohe rift is the land part of the Liaodong Bay rift zone. It is located in the strip from the west of Shenyang to Yingkou. The west is near the Wulifu fold belt. The east part is the Liaodong uplift. It extends 40 ° ~ 45 ° to the east and is 200 km long and 49 Km (Figure 1). The basement of this area is the former Sinian deep metamorphic granite gneiss, the absolute age of 1.8 billion years. Sinian sub-region encountered in the western Liaohe rift, the lower part of the Dahongyu group quartzite and quartz sandstone, the upper part is the Gaozhuangzhuang dolomitic limestone; Paleozoic east-west distribution, in the eastern part of the rift bubble The tectonic drilling is the Cambrian Ordovician limestone. The Mesozoic sedimentary basin is located on both east and west sides of the rift zone. The Cenozoic rift is at the top of the paleo-uplift. Its geological and geophysical characteristics have many similarities to the typical continental rifts in the world.