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DistributionofCo-Niinmafic.ultramaficlayeredintrusion andimplicationsforformationofmagmaticdeposits:AcasestudyoftheStillwaterComplex

文献类型：期刊论文

作者Bai Yang2; Su BenXun1,3; Xiao Yan4; Cui MengMeng1,3; Wang Jing1; Yuan QingHan1,3
刊名ACTA PETROLOGICA SINICA
出版日期2023-04-01
卷号39期号:4页码:1172-1184
关键词Stillwaterlayeredcomplex Co.Nielements Olivine Chromite PGE
ISSN号1000-0569
DOI10.18654/1000.0569/2023.04.15
英文摘要The Still water Complexis one oft he large layered intrusions on Earth and consists of Basal Series,Ultramafic Series,and Banded Series.This study aim store vealth efactors controlling the distribution of nickel (Ni) and cobalt (Co) contents in olivine, pyroxene,chromite,and whole.rocks from different rock series of the Still water Complex.In the Ultramafic Series,Ni and Cocontents in olivine range from 2070 x 10(-6) to 3019 x 10(-6) and 105 x 10(-6) to 205 x 10(-6),respectively,and chromite has Ni contents of 434 x 10(-6) similar to 1843 x 10(-6) and Co of 221 x 10(-6) similar to 737 x 10(-6), both higherth an orthopyroxene (Ni: 464 x 10(-6) similar to 678 x 10(-6);Co:31 x 10(-6) similar to 95 x 10(-6)),and clinopyroxene (Ni:237 x 10(-6)similar to 378 x 10(-6);Co:15 x 10(-6) similar to 45 x 10(-6)).Stratigraphic profile shows that olivine from the Lowest Cyclic Unithasthehighest Cocontent of 173x10(- 6) similar to 193 x 10(-6) on massivechromititeoftheG.HCyclicUnitscontainsthelowestCocontentsof125x10-6 similar to 141x10-6.Accordingly,themassive olivine cumulates contribute to the distinctly decreasing Ni contentsin hromite from chromitites in the other yclic Units (B Cyclic Unit: 700 x 10(-6)similar to 1843 x 10(-6);G.H Cyclic Units:641 x 10(-6) similar to 1206 x 10(-6);J.K Cyclic Units:1046 x 10(-6) similar to 1135 x 10(-6))to chromite from silicate cumulates in the Lowest Cyclic Unit having the lowest Ni contents of 434 x 10(-6) similar to 558 x 10(-6).In addition,themineral modal ratios of olivine and chromite avea distin ctlynegative correlation witht he Co/Nivalues of the whole.rocks,further suggesting the controlling effects of olivine on Ni and chromiteonCo.In the Banded Series,due to the limite damounts of olivine and chromitepresent, the Ni and Cocontents of orthopyroxene(Ni:375 x 10(-6)similar to 652 x 10(-6);Co:101 x 10(-6)similar to 112 x 10(-6)) and clinopyroxene(Ni:278x 10(-6) similar to 384 x 10(-6);Co:41 x 10(-6) similar to 56 x 10(-6))are slightly higher compared with those in the Ultramafic Series.None theless,the Ni and Cocontents of the whole rocks in the Banded Series(Ni:88 10(-6) similar to 947x10(-6);Co:21x10(-6) similar to 53x10(-6))are significantly lower than those in the Ultramafic Series(Ni:698 x 10(-6) similar to 1755 x 10(-6);Co:99 x 10(-6) similar to 207 x 10(-6)),sugges ting that the massivecumulates of olivine and chromite caused the depletion of Ni and Coin theme lts and baresulfidemineralizationinlargelayeredintrusions.The platinumgroupelements(PGEs) concentrated in liquid sreleased during chromitecry stallization may beessential for the formation of PGE deposits.The J.M ReefandPicketPinin OB.Iand OB.V indicate the sulfidesaturation andse gregation,as well as the precipitated PGEs from liquid stosulfides in the lower Banded Seriesand the Middle Banded Series
WOS关键词PLATINUM-GROUP ELEMENTS ; STILLWATER COMPLEX ; SULFIDE DEPOSIT ; PARTITION-COEFFICIENTS ; SILICATE MELT ; NI ; CONSTRAINTS ; OLIVINE ; GEOCHEMISTRY ; PGE
WOS研究方向Geology
语种英语
WOS记录号WOS:000970513600015
出版者SCIENCE PRESS
源URL[http://ir.iggcas.ac.cn/handle/132A11/110882]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Bai Yang
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Taiyuan Univ Technol, Coll Min Engn, Taiyuan 030024, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Bai Yang,Su BenXun,Xiao Yan,et al. DistributionofCo-Niinmafic.ultramaficlayeredintrusion andimplicationsforformationofmagmaticdeposits:AcasestudyoftheStillwaterComplex[J]. ACTA PETROLOGICA SINICA,2023,39(4):1172-1184.
APA Bai Yang,Su BenXun,Xiao Yan,Cui MengMeng,Wang Jing,&Yuan QingHan.(2023).DistributionofCo-Niinmafic.ultramaficlayeredintrusion andimplicationsforformationofmagmaticdeposits:AcasestudyoftheStillwaterComplex.ACTA PETROLOGICA SINICA,39(4),1172-1184.
MLA Bai Yang,et al."DistributionofCo-Niinmafic.ultramaficlayeredintrusion andimplicationsforformationofmagmaticdeposits:AcasestudyoftheStillwaterComplex".ACTA PETROLOGICA SINICA 39.4(2023):1172-1184.

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来源：地质与地球物理研究所

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