摘要
马泉金矿床位于礼县—白云—山阳深断裂西段膨大分枝锐角夹持区,受印支期中川复式花岗岩体南外接触带中近东西向脆-韧性剪切带和叠加于该剪切带上的脆性断裂构造控制。通过对中川岩体的特征及含金性的论述和中石炭统、中泥盆统地层含金性的论述,认为马泉金矿的金源应来自浅部地层;通过对石英样品δ18O的论述,认为矿石的主要物质成份氧亦来自地层;通过成矿溶液水的氧氢同位素特征的论述,认为成矿溶液水是少量岩浆水参入了大量的大气降水组成的混合热液水;通过硫同位素特征和稀土元素配分模式的论述后认为硫具深源性,而稀土元素亦来自地层。通过对成矿物理化学条件的论述后认为成矿于中低温弱矿化度、弱酸性、弱还原条件下。中川岩体是矿床形成的热源体。矿床应属微细侵染型(即卡林型)金矿床。
MaQuan gold deposit occur in where between tuo subsidiary fractures which mack of by Lixian_Baiyun_shan yang regional mego_fracture. And controlled strictly by the ductile foult and the tenacity shear zone, which within the contact past of zhongchuar igneous rocks. By studying on the features of zhong chuan igneous rocks and the ore_bearing beds. The ore forming environments. So the author discriminate it that： the gold of the deposit come from the ore_bearing heels, and zhongchuan igneous rocks is favorable condition for the gold deposit. And the ore genesis is veinlet- netted vein gold dcoosit.
出处
《黄金科学技术》
2006年第5期13-20,共8页
Gold Science and Technology
关键词
成矿环境
成矿物质
热液性质
矿床类型
ore-forming environment. Mechanism of formation. Thermal-water. classificaion
