泵吸成矿作用:一种流体运移动力学机制  

Mineralization controlled by pumping suction:A dynamic mechanism of fluid transport

作　　者：李德东[1] 解洪晶[1] 孙燕 张凤琴[2] 杨云鹏 邱金柱 刘俊利 Li Dedong;Xie Hongjing;Sun Yan;Zhang Fengqin;Yang Yunpeng;Qiu Jinzhu;Liu Junli(Beijing Institute of Geology for Mineral Resources Co.,Ltd.;China University of Geosciences(Beijing);103 Branch Non-ferrous Geological of Liaoning Province Co.,Ltd.)

机构地区：[1]北京矿产地质研究院有限责任公司 [2]中国地质大学(北京) [3]辽宁省有色地质一〇三队有限责任公司

出　　处：《黄金》2023年第10期71-78,共8页Gold

基　　金：国家重点研发计划项目(2018YFC0603804);紫金矿业集团股份有限公司综合找矿预测专项(KCDZKCY-2022-048)。

摘　　要：大型—超大型矿床的形成需要大规模流体参与,流体的侵位机制是一个悬而未决的科学问题。提出利用泵吸作用解释成矿机理,以及地质作用过程中存在着2种泵吸作用,即“构造泵吸”和“岩浆泵吸”。前者是在盖层密封良好的条件下,因构造作用使不同物理性质的岩层发生不同程度变质变形,使岩层之间产生类似真空状态的“构造泵”,在断层沟通深部岩浆房或流体库的作用下,深部成矿流体在泵吸作用下上侵到浅部形成矿体。后者是在深部岩浆房中的岩浆被泵吸上侵后形成岩浆房内或通道内类似真空状态的“岩浆泵”,在断层沟通作用下泵吸更深部的流体。利用泵吸成矿作用,对一个地区构造变质变形作用范围进行详细圈定,就可以限定成矿的作用范围,为找矿预测提供重要参考。The formation of large-scale to super large-scale deposits require large-scale fluid participation,and the mechanism of fluid emplacement is an unsolved scientific problem.In this paper,the mechanism of mineralization is explained by pumping suction,and it is proposed that there are two kinds of pumping suction in geological processes,namely"structural pumping"and"magmatic pumping".The former is a vacuum-state"structural pump"formed because the strata of different physical properties,due to tectonics,are metamorphosed and deformed in varying degrees under the condition of good sealing of the cap-rocks.Under the communication of fault to deep magma chamber or fluid reservoir,deep ore-forming fluid invades shallow rock mass to form ore bodies under pump suction.The latter is a vacuum-state"magmatic pump"formed in the deep magma chamber or channel because the magma in the deep magma chamber is pumped up and invades,and the deeper fluid will be pumped under the action of fault communication.By using pumping-suction mineralization,the range of tectonic metamorphism and deformation in a region can be delineated in detail,and the range of mineralization can be defined,which can provide an important reference for prospecting prediction.

关 键 词：泵吸作用 构造泵 岩浆泵 成矿作用 找矿预测 流体 

分 类 号：TD11[矿业工程—矿山地质测量]