黄金科学技术 ›› 2020, Vol. 28 ›› Issue (6): 825-836.doi: 10.11872/j.issn.1005-2518.2020.06.097
摘要:
寨上金矿床是西秦岭造山带礼—岷成矿带西段一个十分重要的类卡林型金矿床。矿体赋存于泥盆—二叠系的浅变质碎屑岩和碳酸盐岩的层间破碎带中,受构造控制明显。为了分析构造与成矿之间的关系,对寨上金矿区构造裂隙进行了野外观察和统计分析,并对构造控矿规律进行了总结。研究结果表明:寨上金矿床的主要控矿构造方向为NW向;寨上金矿床的成矿具有多期次的特点,与多期次的构造运动相对应;印支期是本矿床一个重要的构造期,该期SN向的挤压应力对节理裂隙的形成有十分重要的影响,并在此应力作用下元素富集形成了早期的矿体;燕山期受NE向扭应力作用,NW向构造发生继承性活动,岩浆热液顺裂隙就位,混入大气降水,在早期矿体上叠加成矿。
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