黄金科学技术 ›› 2022, Vol. 30 ›› Issue (3): 352-365.doi: 10.11872/j.issn.1005-2518.2022.03.018
钟伶志1,2(),毛先成1,2(),刘占坤1,2,肖克炎3,王春锬1,2,陈武1,2
Lingzhi ZHONG1,2(),Xiancheng MAO1,2(),Zhankun LIU1,2,Keyan XIAO3,Chuntan WANG1,2,Wu CHEN1,2
摘要:
胶东半岛三山岛金矿带矿体形态、规模及产出空间与断裂关系紧密。基于三山岛金矿带地质模型,利用FLAC3D数值模拟软件,开展力—热—流耦合的数值模拟分析,探讨断裂构造几何特征对矿体就位的控制作用。模拟结果表明:在走向上,三山岛断裂拐弯处容易积累更大的剪切应变和正体积应变(张性),形成扩容空间,使断裂拐弯处形成局部的厚大金矿体;在倾向上,断裂带由陡倾向缓倾转换的部位及倾角平缓部位形成扩容空间,而陡倾部位挤压效果明显,形成压缩区,这种不同坡度部位的差异性应变分布控制了矿体沿倾向间断分布的特征。根据新立地区与三山岛、西岭地区的模拟流体方向差异推测,新立地区SE向深部、三山岛和西岭地区NE向深部具有较大成矿潜力。
中图分类号:
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