推荐回答（1个）
1）鲁西南西部巨野煤田，以田桥断层为界分为东、西两区。西区北部、中部、南部有较大面积的岩浆岩分布，且多以岩床、岩脉、岩楔等方式沿煤层及煤系地层顺层侵入，对煤层造成破坏。岩体分上、下两层，上层岩浆岩位于下二叠统山西组3＃煤及其附近，下层位于煤田中部上石炭统太原组16煤及其附近。东区北部梁宝寺井田岩浆侵入太原组16、17煤层及其附近；南部金乡井田内东、西部各有一层以岩床形式沿断裂顺层侵入的岩体，侵入到山西组3＃煤层及太原组、石盒子组和古近-新近系中。
2）预测区所在的济宁煤田除东北部未发现岩浆岩外，其余部位均有岩浆岩分布，为一大型辉绿岩岩床，侵入到上侏罗统蒙阴组，距煤层较远。该岩床厚55～155m，表现为由北向南增厚的趋势。
3）巨野煤田年龄值为68.45～122.86Ma；济宁煤田为106.4Ma；滕县煤田为61.05～70.87Ma，由区域资料分析及测试，除巨野煤田南部金乡井田有喜马拉雅期岩浆活动外，其他各区岩浆活动都属燕山晚期，为同期、不同幕次产物。
4）预测区及其外围岩浆岩多分布于南北向大断裂与东西向大断裂交汇附近，说明东部岩浆可能来源于东边界郯庐断裂及峄山断层、孙氏店断层等区域大断裂；西部岩浆可能来自鲁西北边界聊考断裂及区内其他断裂。
5）杨集预测区所在的济宁凹陷侵入到上侏罗统蒙阴组下部的辉绿岩床中，距煤层较远，对预测区3＃煤层没有破坏作用。
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