中国工程科学
中國工程科學
중국공정과학
ENGINEERING SCIENCE
2015年
2期
73-84
,共12页
刘美玉%苏尚国%宋晨%蔡楠
劉美玉%囌尚國%宋晨%蔡楠
류미옥%소상국%송신%채남
金川%Cu-Ni-(PGE)%硫化物矿床%岩浆通道成矿系统%前进方向%定量化结构分析
金川%Cu-Ni-(PGE)%硫化物礦床%巖漿通道成礦繫統%前進方嚮%定量化結構分析
금천%Cu-Ni-(PGE)%류화물광상%암장통도성광계통%전진방향%정양화결구분석
Jinchuan%Cu-Ni-(PGE)%sulfide deposit%magma conduit metallogenic system%moving direction%quantitative textural analysis
综合运用地球化学手段，研究了金川铜镍（铂）硫化物矿床铂族元素的空间分布特征，并结合定量化结构分析，探讨了岩浆演化过程中的动力学作用过程，讨论了金川镁铁-超镁铁质岩浆的演化历程。研究发现，铂族元素在矿体中的空间分布呈一定规律变化。整体说来，自西向东，Pd/Ir-Ni/Cu在各矿体间呈递减趋势，分析认为造成这种规律的原因是矿石的形成经历了单硫化物固溶体（MSS）的分离结晶作用。通过岩石定量化结构分析发现，1号矿体较24号矿体岩石结构成熟度更高，分析认为1号矿体侵位时间早，后期结构调整更为充分。综合地球化学和岩浆动力学方面的信息，最终得出了金川岩浆通道系统在空间上表现为沿矿体走向自北西向南东前进的结论。
綜閤運用地毬化學手段，研究瞭金川銅鎳（鉑）硫化物礦床鉑族元素的空間分佈特徵，併結閤定量化結構分析，探討瞭巖漿縯化過程中的動力學作用過程，討論瞭金川鎂鐵-超鎂鐵質巖漿的縯化歷程。研究髮現，鉑族元素在礦體中的空間分佈呈一定規律變化。整體說來，自西嚮東，Pd/Ir-Ni/Cu在各礦體間呈遞減趨勢，分析認為造成這種規律的原因是礦石的形成經歷瞭單硫化物固溶體（MSS）的分離結晶作用。通過巖石定量化結構分析髮現，1號礦體較24號礦體巖石結構成熟度更高，分析認為1號礦體侵位時間早，後期結構調整更為充分。綜閤地毬化學和巖漿動力學方麵的信息，最終得齣瞭金川巖漿通道繫統在空間上錶現為沿礦體走嚮自北西嚮南東前進的結論。
종합운용지구화학수단，연구료금천동얼（박）류화물광상박족원소적공간분포특정，병결합정양화결구분석，탐토료암장연화과정중적동역학작용과정，토론료금천미철-초미철질암장적연화역정。연구발현，박족원소재광체중적공간분포정일정규률변화。정체설래，자서향동，Pd/Ir-Ni/Cu재각광체간정체감추세，분석인위조성저충규률적원인시광석적형성경력료단류화물고용체（MSS）적분리결정작용。통과암석정양화결구분석발현，1호광체교24호광체암석결구성숙도경고，분석인위1호광체침위시간조，후기결구조정경위충분。종합지구화학화암장동역학방면적신식，최종득출료금천암장통도계통재공간상표현위연광체주향자북서향남동전진적결론。
By the using of geochemical methods and quantitative textural analysis,This pa-per studied the spatial distribution characteristics of platinum group elements in Jinchuan Ni-Cu-(PGE)sulfide deposit,discussed the dynamic behavior in the process of magma evolution,and the evolution of Jinchuan mafic-ultramafic magma .This study found that the spatial distribution of the platinum group elements showing a certain regular changes between four continuous ore bodies. Overall,there are a significant decrease in the value of Pd/Ir-Ni/Cu between the four ore bodies from west to east. Through the analysis,the cause which effected the distribution is that the monosulfide solid solution(MSS)has experienced a process of crystallization differentia-tion during crystal fractionation. On the other hand,through quantitative textural analysis,found that the structure of No. 1 ore body is much more mature than No. 1 ore body,which suggested that the emplacement of the former one is much more earlier than the latter one. Integrated geo-chemical and magma dynamics information,finally obtained the conclusion that the moving di-rection of Jinchuan magma conduit system is along the strike of the intrusions from northeast to southeast.
