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中国已发现的幔源岩浆成因CO2气藏主要分布在与郯庐断裂发育密切相关的东部伸展盆地,两者关系具体表现如下:1.中国东部幔源岩浆成因CO2气藏的空间展布与郯庐断裂保持一致;2.郯庐断裂切割深度达到上地幔;3.沿郯庐断裂岩浆活动强烈,且具幔源特点;4.中国东部伸展盆地自中、新生代以来的演化受郯庐断裂带活动影响。本文主要以郯庐断裂带为主线,结合幔源岩浆成因CO2气藏典型实例,从郯庐断裂构造环境、空间格局和演化过程对幔源岩浆成因CO2的控制作用进行初步归纳和分析。
The mantle-derived magmatic CO2 gas reservoirs discovered in China are mainly distributed in the eastern extensional basins closely related to the development of the Tanlu fault. The relationship between the two is as follows: 1. The spatial distribution of mantle-derived magmatic CO2 gas reservoirs in eastern China is consistent with that of Tanlu fault.2. Tan Lu fault cutting depth reached the upper mantle; 3. The magmatic activity along the Tancheng-Lujiang fault is intense with mantle-derived features; 4. The evolution of the extensional basins in eastern China since the Cenozoic and Cenozoic was affected by the activities of the Tan-Lu fault zone. In this paper, the main line of the Tancheng-Lujiang fault zone is taken as an example. Based on the typical examples of mantle-derived magmatic CO2 gas reservoirs, the controlling role of mantle-derived magma CO2 origin from the tectonic environment, spatial pattern and evolution of the Tanlu fault is initially summarized and analyzed.