CAJ | 학술논문

亲铜元素在岩浆演化和硫化物熔离过程中的行为是解释岩浆硫化物矿床形成过程的一个窗口,通过实验研究来探讨亲铜元素的地球化学行为,并用于岩浆硫化物矿床的定量化研究是此类矿床今后的一个发展方向.本文总结了硫和亲铜元素在岩浆演化过程中的行为规律,并阐明了在岩浆硫化物矿床中的应用,在如下五个方面分别做了讨论:① 通过实验对玄武质岩浆中S溶解度的研究,总结出引起硫化物饱和的4个控制因素: 岩浆混合、温度迅速降低、壳源混染、快速的结晶分异作用;② 通过Ni在橄榄石和硅酸盐熔浆中的分配,定量模拟了岩浆演化过程中,橄榄石中的Ni含量随着橄榄石成分(Fo)变化的规律;③ 总结了Ni-Cu-PGE-Au在液态硫化物和硅酸盐岩浆中的分配系数,总结了控制分配系数的因素,并探讨了"R-因素"对亲铜元素富集的控制机理;④ 橄榄石被硫化物包围时,与硫化物发生交换反应,通过交换反应系数(K_D)可以定量估算硫化物熔浆中Ni的含量;⑤ 通过实验得出的亲铜元素在单硫化物固溶体(MSS)和液态硫化物之间的分配,总结了岩浆铜镍硫化物矿床中的分带现象.最后探讨了岩浆硫化物矿床存在的问题和发展方向.
친동원소재암장연화화류화물용리과정중적행위시해석암장류화물광상형성과정적일개창구,통과실험연구래탐토친동원소적지구화학행위,병용우암장류화물광상적정양화연구시차류광상금후적일개발전방향.본문총결료류화친동원소재암장연화과정중적행위규률,병천명료재암장류화물광상중적응용,재여하오개방면분별주료토론:① 통과실험대현무질암장중S용해도적연구,총결출인기류화물포화적4개공제인소: 암장혼합、온도신속강저、각원혼염、쾌속적결정분이작용;② 통과Ni재감람석화규산염용장중적분배,정량모의료암장연화과정중,감람석중적Ni함량수착감람석성분(Fo)변화적규률;③ 총결료Ni-Cu-PGE-Au재액태류화물화규산염암장중적분배계수,총결료공제분배계수적인소,병탐토료"R-인소"대친동원소부집적공제궤리;④ 감람석피류화물포위시,여류화물발생교환반응,통과교환반응계수(K_D)가이정량고산류화물용장중Ni적함량;⑤ 통과실험득출적친동원소재단류화물고용체(MSS)화액태류화물지간적분배,총결료암장동얼류화물광상중적분대현상.최후탐토료암장류화물광상존재적문제화발전방향.
Chemical behavior of chalcophile elements in the process of magma evolution and sulfide segregation is a window to demonstrate the formation of sulfide deposits. One direction of development of the study of sulfide deposit is to trace the behavior of chalcophile elements through laboratory results. The present paper summarizes the behavior of sulfur and chalcophile elements in magma evolution, and demonstrates their application in the study of magmatic sulfide deposits. They are discussed from five factors: ① by the study of sulfur solubility in basaltic magma, four factors control the sulfide segregation: magma mixing, rapid temperature decrease, crustal contamination, and rapid crystal fractionation; ② according to the distribution of Ni between olivine and silicate magma, we simulate the correlated change of Ni in olivine to Fo;③ the D values of Ni-Cu and PGE between sulfide liquid and silicate melt is are summarized, and the controlling factors to D value and R-factor are discussed also; ④ when olivine is surrounded by sulfide liquid, the interaction will happen, and Ni content in sulfide liquid can be estimated; ⑤ by the distribution of chalcophile elements between MSS and sulfide liquid, the facts of ore-forming zonations are summarized. At the end, the present problems and direction of development are analyzed and suggested.