临沂煤田岩浆活动规律

临沂煤田的侵入岩主要为燕山晚期的中基性岩类,以闪长玢岩最发育。产状有岩床、岩脉、岩鞍等。侵入规律是:纵向上山西组侵入最严重,3煤尤其强烈。横向上以距郯庐断裂带远近而强弱呼应,说明受郯庐断裂控制非常明显。

MAGMATION RULE OF COAL FIELD IN LINYI

The intrusire igneous rocks of coal field in lin yi are mainly neutralbasic rocks of yom shan later period of which dioritic porphyrites are most developed. The forms of intrusive masses are in sill, dike, phacolith, and so on. The intrusive rule is that the stratum of shun xi Group are intruded strongly in the vertical, in which the third coal seam is intruded most most strongly, and in lateral, the less distance to Tan Lu Fault zone is, the stronger the intrusion is. This state that intrusion is clearly controlled by Tan Lu Fault