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- 2017
渭河盆地构造应力场有限元数值模拟
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Abstract:
依据渭河盆地活动构造特征及深部地层结构，以高精度GPS成果为边界条件，构建了区域三维有限元模型，并将模拟断裂运动性质及区域构造应力场，与地质地球物理的结果对比检验了模型模拟结果合理性。数值模拟结果更加精细地揭示出，陇县-马昭与韩城-华县断裂是渭河盆地中部与东、西部构造应力场差异的明显分界带，两条断裂夹挟的盆地中部区域是拉张应力（NW-SE向）集中带，陇县-马昭断裂以西则呈显著挤压应力（近E-W向），韩城-华县断裂以东以NE-SW向挤压应力为主；而礼泉-蒲城-合阳断裂又为盆地中部区域南、北两侧构造应力场差异分界带，断裂南侧较北侧呈现出更显著的NW-SE向拉张应力，该特征与断裂南侧构造地裂缝较北侧更为发育相对应
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