地球科学与环境学报
地毬科學與環境學報
지구과학여배경학보
JOURNAL OF EARTH SCIENCES AND ENVIRONMENT
2014年
3期
83-93
,共11页
岩浆%热液%软硬酸碱理论%矿床成因%电负性%硬度%亲电性%成矿专属性
巖漿%熱液%軟硬痠堿理論%礦床成因%電負性%硬度%親電性%成礦專屬性
암장%열액%연경산감이론%광상성인%전부성%경도%친전성%성광전속성
magma%hydrothermal%hard-soft acid-base theory%ore genesis%electronegavity%hardness%electrophilicity%metallogenic specificity
根据软硬酸碱理论的最大硬度原理和最小亲电性原理,基于复杂化合物体系的硬度和亲电性计算方法,对国内外多个典型岩浆热液矿床的成矿岩体以及成矿热液的硬度和亲电性进行估算,进而探讨岩浆热液矿床成矿专属性。结果表明：热液具有比岩浆更高的硬度和亲电性,可以从熔体中萃取金属元素,从而形成岩浆热液矿床；与碰撞造山作用相关的长英质岩浆流体富含 F,而 F 具有高硬度和亲电性,导致具有硬酸性质的W、Sn从熔体进入流体成矿；由于软碱S具有低硬度和亲电性,弧岩浆作用形成的富S基性岩浆有利于吸引低硬度的成矿元素,形成斑岩型铜(金)矿床；与板内伸展环境下岩浆底侵作用相关的碱性岩浆释放富 Cl 或 CO2的流体,Cl 的硬度较低而电负性高,热液主要吸引Fe、REE、Au等,从而形成IOCG型矿床。
根據軟硬痠堿理論的最大硬度原理和最小親電性原理,基于複雜化閤物體繫的硬度和親電性計算方法,對國內外多箇典型巖漿熱液礦床的成礦巖體以及成礦熱液的硬度和親電性進行估算,進而探討巖漿熱液礦床成礦專屬性。結果錶明：熱液具有比巖漿更高的硬度和親電性,可以從鎔體中萃取金屬元素,從而形成巖漿熱液礦床；與踫撞造山作用相關的長英質巖漿流體富含 F,而 F 具有高硬度和親電性,導緻具有硬痠性質的W、Sn從鎔體進入流體成礦；由于軟堿S具有低硬度和親電性,弧巖漿作用形成的富S基性巖漿有利于吸引低硬度的成礦元素,形成斑巖型銅(金)礦床；與闆內伸展環境下巖漿底侵作用相關的堿性巖漿釋放富 Cl 或 CO2的流體,Cl 的硬度較低而電負性高,熱液主要吸引Fe、REE、Au等,從而形成IOCG型礦床。
근거연경산감이론적최대경도원리화최소친전성원리,기우복잡화합물체계적경도화친전성계산방법,대국내외다개전형암장열액광상적성광암체이급성광열액적경도화친전성진행고산,진이탐토암장열액광상성광전속성。결과표명：열액구유비암장경고적경도화친전성,가이종용체중췌취금속원소,종이형성암장열액광상；여팽당조산작용상관적장영질암장류체부함 F,이 F 구유고경도화친전성,도치구유경산성질적W、Sn종용체진입류체성광；유우연감S구유저경도화친전성,호암장작용형성적부S기성암장유리우흡인저경도적성광원소,형성반암형동(금)광상；여판내신전배경하암장저침작용상관적감성암장석방부 Cl 혹 CO2적류체,Cl 적경도교저이전부성고,열액주요흡인Fe、REE、Au등,종이형성IOCG형광상。
According to the maximum hardness principle and the minimum electrophilicity principle of hard-soft acid-base theory, based on the calculation method for hardness and electrophilicity of the complex compound system, the hardness and electrophilicity of metallogenic rock body and hydrothermal of some typical magmatic hydrothermal deposits around the world were estimated,and then the metallogenic specificity of magmatic hydrothermal was discussed.The results show that hardness and electrophilicity of hydrothermal are higher than that of magma,the hydrothermal can extract metal element from melt,and then the magmatic hydrothermal deposit is formed;the fluid from felsic magmatic rock related to collisional orogeny is richen in F,and the hardness and electrophilicity of F are higher,so that the hard acid W and Sn flow from melt to fluid for mineralization;the hardness and electrophilicity of soft base S are lower,and the basic magma rich in S and formed by arc magmatism is favourable to attracting the metallogenic element with lower hardness,so that the porphyry Cu (Au)deposit is formed;alkaline magma related to magmatic underplating in the intraplate extensional environment releases the fluid rich in Cl or CO2;the hardness of Cl is lower,but the electrophilicity is higher, so that the hydrothermal mainly attracts Fe,REE and Au to form IOCG deposit.
