大陆裂谷是大陆板块内部的构造缝,它具有线型裂谷地貌和在拉伸应力下形成的窄长的垒堑构造;由于同生正断层的控制,裂谷内堆积了巨厚的陆相碎屑岩,尤以红色类磨拉石建造的发育为特征;裂谷深部地壳变薄,地幔上拱,具有透镜状壳幔层(或裂谷枕);裂谷一般伴随有碱性、偏碱性的火山岩,或拉斑系列玄武岩浆喷发,以及深成侵入活动;与此同时产生地壳上部的横张,并导致高热流和频繁的浅源地震活动。 在中国大陆上,究竟有没有裂谷?有没有古裂谷?这是一个重要研究课题。 三年来,在黄汲清教授指导下,笔者重点研究了中国东部著名的郯庐深断裂中段(山东沂沭地带)中生代以来的地质发展史,初步确定了郯庐断裂中段晚中生代(晚侏罗至晚 The continental rift is a structural seam within the continental plate, which has a linear rift topography and a narrow, long-length basement structure formed under tensile stress. Due to the symbiotic normal faults, massive continental facies Characterized by the development of clastic rocks, especially the red type molasse. The deep crust of the rift is thinned and the mantle is arched with lenticular mantle (or rift pillow). The rift is generally accompanied by alkaline and partial Alkaline volcanic rocks, or basalt magma eruptions, as well as deep-penetrating intrusions; at the same time, they produce transverses in the upper crust and lead to high heat flux and frequent shallow-source seismic activity. In mainland China, is there any rift? There is no ancient rift? This is an important research topic. In the past three years, under the guidance of Prof. Huang Jiqing, the author has focused on the geological history since the Mesozoic in the middle of the famous Tanlu deep fault in eastern China (Shandong Yishu area), and has initially identified the Late Mesozoic mid-Late Jurassic To night