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以河南西峡石板沟金矿为例 ,选择了一条控矿剪切带 ,对其中成矿地段的近矿蚀变岩和非成矿地段糜棱岩进行了系统的采样 ,探讨了二者在流体 -岩石反应及岩石质量平衡之间的差异性。研究表明 ,剪切带中矿化地段蚀变岩其岩石体积总是扩容的 ,非矿化地段糜棱岩在变形过程中体积是损失的。矿化地段蚀变岩活性元素 ( K、Na、Si)总体呈被带入趋势 ,非矿化地段糜棱岩活性元素总体呈迁出趋势 ,糜棱岩的流体岩石率 ( Nu 为 93.68— 468.40 )远大于蚀变岩的流体岩石率 ( N cs( ) 为 36.1 1 - 2 1 6.67) ,剪切带中常量元素与微量元素富集与损失是渗透性流体带入、带出 ,岩石的体积损失与扩容综合作用的结果。
Taking the Shixiagou gold deposit in Xixia, Henan Province as an example, a controlled ore-controlling shear zone was selected to systematically sample the mylonites in near-ore altered and non-ore-forming areas in the ore-forming area, Differences between fluid-rock response and rock mass balance. The results show that the rock volume of altered rocks in the mineralized section of the shear zone always expands, and the volume of the mylonite in the non-mineralized section is lost in the deformation process. The active elements (K, Na, Si) of the altered rocks in the mineralized areas are generally brought into the trend. The mylonite active elements in the non-mineralized areas are generally migrating outwards. The fluid rock rate of the mylonites (Nu is 93.68- 468.40 ) Is much larger than that of altered rock (N cs () is 36.1 1 - 2 1 6.67). The enrichment and loss of constant elements and trace elements in the shear zone are caused by the infiltration and outflow of rocks, the volume of rock Loss and expansion of the combined effect of the results.