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58问答库 > 淮南煤田地质构造是什么？

淮南煤田地质构造是什么？

2025-03-31 07:13:42

推荐回答（1个）

回答（1）：

淮南煤田为一轴向北西西的复向斜构造，主要由上古生界组成，下古生界位于煤田南、北两侧，煤田普遍被第四系覆盖。煤田南、北边缘有低角度走向逆断层发育，造成下古生界几度逆覆于上古生界之上。在复向斜中，有一组北东向的正断层发育，将上古生界切割成阶梯状块段。石炭二叠纪煤系广泛赋存于复向斜中，并往往形成次一级褶皱。燕山期岩浆活动多以小型细晶岩、煌斑岩岩脉、岩床侵入煤系，对煤层局部有影响。

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