云南白马寨铜镍硫化物矿床Re-Os同位素定年及其地质意义
摘要
采用 Carius 管溶矿、蒸馏法分离 Os、丙酮萃取 Re 和电感耦合等离子体质谱(ICP-MS)联合测定法,对云南白马寨岩浆岩型铜镍硫化物矿硫化物矿石进行了 Re-Os 同位素精确定年,得出其等时线年龄为259±18Ma(MSWD=0.028),~(187)Os/~(188)Os 初始值为0 455±0 024,相当于γ(Os(t)为+263。硫化物矿石 Re/Os 比值为11.56~21.04。研究结果显示,白马寨铜镍硫化物矿床成矿时代与峨眉大火山岩省主喷发期基本同时,其物质来源属壳-幔混合来源,壳源 Os 的加入量约为30%左右。
Re-Os isotopic age of sulfide ores from Baimazhai Cu-Ni sulphide deposit in Yunnau province was determined by using earius tube decomposing technique,acetone extracted Re and inductively coupled plasma mass spectrometry(ICP-MS).The results show that the Re-Os isochron age is 259±18Ma (MSWD=0.055),with an initial ~(187)Os/~(188)Ss Os value of 0.455±0.024 and a corresponding (Os(t) of+263.The Re/Os ratios of sulfide ores vary from 11.56 to 21.04.The data suggest that ore-forming age of the Baimazhai Cu-Ni deposit was very close to major eruption stage of the Emeishan large igneous provinces (LIPs),and the ore- forming material derived both from the mantle and the crust.The content of crust-derived Os was estimated to be~30%.
Re-Os isotopic age of sulfide ores from Baimazhai Cu-Ni sulphide deposit in Yunnau province was determined by using earius tube decomposing technique,acetone extracted Re and inductively coupled plasma mass spectrometry(ICP-MS).The results show that the Re-Os isochron age is 259±18Ma (MSWD=0.055),with an initial ~(187)Os/~(188)Ss Os value of 0.455±0.024 and a corresponding (Os(t) of+263.The Re/Os ratios of sulfide ores vary from 11.56 to 21.04.The data suggest that ore-forming age of the Baimazhai Cu-Ni deposit was very close to major eruption stage of the Emeishan large igneous provinces (LIPs),and the ore- forming material derived both from the mantle and the crust.The content of crust-derived Os was estimated to be~30%.
引文
Ali JR,Thompson GM,Zhou MF et al.2005. Xieyan SongEmeishan large igneous province,SW China.Lithos,79:475-489
Bureau of Geology and Mineral Resources of Yunnan Province.1990. Regional Geology of Yunnan Province.Beijing:Geological Publishing House,331-350(in Chinese with English abstract)
Deng JF.1999. The sulphide Cu-Ni and Pt deposits in Yunnan.Geology of Yunnan,18(1) :22-35(in Chinese with English abstract)
Dong FL,Hon ZQ,Gao YF,et al.2005. Re-Os isotopic dating of molybdenite from Datongchang copper-lead-zinc deposit in Tengchong area,Western Yunnan
Du AD,He HL and Yin WN et al.1994. The study on the analytical methods of Re-Os age for molybdenites.Acta Geologica Sinica,68(4) :339-347(in Chinese with English abstract)
Jiang SY,Yang JH,Zhao KD,et al.2000. Re-Os isotope tracer and dating method in ore deposits research.Journal of Nanjing University(Natural Sciences Edition),36(6) :669-677(in Chinese with English abstract)
Lambert DD,Foster JG,Frick LR et al.1999. Re-Os isotope systematic of the Voisey's Bay Ni-Cu-Co magmatic ore system,Labrador,Canada.Lithos,47:69-88
Lambert DD,Frick LR,Foster JG et al.2000. Re-Os isotope systematic of the Voisey's Bay Ni-Cu-Co magmatic sulfide system,Labrador,Canada:Ⅱ.Implications for parental magma chemistry,oregenesis,and metal redistribution.Econ.Geol.,95(4) :867-888
Luo JL.1995. Metallogenic model of Pi,Cu-Ni and Cr deposits in Yunnan Province.Yunnan Geology,14(4) :311-318(in Chinese)
Luo ZH,Marakushev AA,Paniakh HH et al.2000. The origin of copper-nickle sulfide deposits(exemplified by Norilsk(Russia)and Jinchuan(China).Mineral Deposits,19(4) :330-339(in Chinese with English abstract)
Mao JW,Du AD.2001. 982Ma Re-Os isotopic age of Cu-Ni sulphide deposit and its geological implication from Baotan area,Guangxi province,China.Science in China(series D),31(12) :993-998
Mao JW,Stein H,Du AD et al.2004. Molybdenite Re-Os precise dating for molybdenite from Cu-Au-Mo deposits in the MiddleLower reaches of Yangtze River belt and its implications for mineralization.Acta Geologica Sinica,78(1) :121-131(in Chinese with English abstract)
Mao JW,Yang JM,Qu WJ et al.2002. Re-Os dating of Cu-Ni sulphide ores from Huangshandong deposit in Xinjiang and its geodynamic significance.Mineral Deposits,21(4) :323-330(in Chinese with English abstract)
Naldrett AJ.1981. Nickel sulfide deposits:Classification,composition,and genesis.Economic Geology 75th Anniversary,628-685
Song LJ,Wu CL,Zhu YJ et al.2005. Geochemical characteristics and mineralization of Baimazhai Cu-Ni sulfide deposit,Yunnan province.Geology and Prospecting,41(4) :39-46(in Chinese with English abstract)
Tang ZL.1996. The main mineralization mechanism of magma sulfide deposits in China.Acta Geologica Sinica,70(3) :237-243(in Chinese with English abstract)
Tao Y,Luo TY,Gao ZM et al.2004. The relation between Emeishan continental flood basalts and Cu-Ni deposits of southwestern China trap:A case study on Jinbaoshan mafic-ultramafic intrusion,Yunnan.Geological Review,50(1) :9-15(in Chinese with English abstract)
Walker RJ,Morgan JW,Hanski EJ et al.1997. Re-Os systematics of Early Proterozoic ferropicrites,Pechenga complex,northwestern Russia:evidence for ancient ~(187) Os enriched plumes.Geochim.Cosmochim.Acta,61:3145-3160
Walker RJ,Morgan JW,Horan MF et al.1994. Re-Os isotopic evidence for an enriched mantle source for the Noril'sk type ore bearing intrusions,Siberia.Geochim,Cosmochim.Acta,58:4179-4197
Wang CX.2000. On the Jinping fault block and it's mineral resources.Geology of Yunnan,21(3) :256-265(in Chinese with English abstract)
Wang SW,Sun XM,Shi GY et al.2006. Platinum group elements(PGE)geochemistry of Baimazhai Ni-Cu sulfide Deposit and its constraints on the ore genesis.Acta Geologica Sinica,80(9) :1474-1486(in Chinese with English abstract)
Xiao L,Xu YG,Mei HJ et al.2003. Late Permian flood basalts at Jinping area and its relation to Emei mantle plume:geochemical evidence.Acta Petrologica Sinica,19(10) :38-48(in Chinese with English abstract)
Yang G,Du AD,Lu JR et al.2005. Re-Os isotopic age dating of Cu-Ni-PGE sulphide deposit from Jinchuan area,Gansu province,China.Science in China(series D),35(3) :241-245
Zhang CJ,Li XL.1998. PGE geochemistry of the Emeishan basalt province.Acta Petrologica Sinica,14(3) :297-304(in Chinese with English abstract)
Zhang XS,Qin DX,Fan GZ et al.2005. Geochemical characteristics of mafic-ultramafic swarms in the Baimazhai nickel and copper deposit,Jinping,Yunuan.Geology and Prospecting,41(4) :51-56(in Chinese with English abstract)
Zhang ZQ,Du AD,Tang SH et al.2004. Age of the Jinchuan Cu-Ni sulphide deposit and isotopic geochemical feature of its source.Acta Geologica Sinica,78(3) :359-365(in Chinese with English abstract)
邓家藩.1999. 云南硫化物型铜镍和铂族矿床.云南地质,18(1) :22-35
董方浏,侯增谦,高永丰等.2005. 滇西腾冲大硐厂铜-铅-锌矿床的辉钼矿 Re-Os 同位素定年.矿床地质,24(6) :663-668
杜安道,何红蓼,殷宁万等.1994. 辉钼矿的铼-锇同位素地质年龄测定方法研究.地质学报,68(4) :339-347
蒋少涌,杨竞红,赵葵东等.2000. 金属矿床 Re-Os 同位素示踪与定年研究.南京大学学报(自然科学),36(6) :669-677
罗君烈.1995. 云南铂、铜镍、铬矿床的成矿模式.云南地质,14(4) :311-318
罗照华,马拉库舍夫 AA,潘妮娅 HA 等.2000. 铜镍硫化物矿床的成因--以诺里尔斯克(俄罗斯)和金川(中国)为例.矿床地质,19(4) :330-339
毛景文.Stein H,杜安道等.2004. 长江中下游地区铜金(钼)矿 Re-Os 年龄精测及其对成矿作用的指示.地质学报,78(1) :121-131
毛景文,杜安道.2001. 广西宅坛地区铜镍硫化物矿石982Ma Re-Os 同位素年龄及其地质意义.中国科学(D 辑),31(12) :993-998
毛景文,杨建民,屈文俊等.2002. 新疆黄山东铜镍硫化物矿床 Re-Os 同位素测定及其地球动力学意义.矿床地质,21:(4) :323-330
宋立军,吴冲龙,朱杰勇等.2005. 白马寨铜镍硫化矿地球化学特征及成矿.地质与勘探,41(4) :39-46
汤中立.1996. 中国岩浆硫化物矿床的主要成矿机制.地质学报,70(3) :237-243
陶琰,罗泰义,高振敏等.2004. 西南暗色岩铜镍硫化物矿化岩体与峨眉山玄武岩的关系-以云南金宝山岩体为例.地质论评,50(1) :9-15
王臣兴.2000. 金平断块及其矿产.云南地质,21(3) :256-265
王生伟,孙晓明,石贵勇等.2006. 云南白马寨铜镍硫化物矿床铂族元素地球化学及其对矿床成因的制约.地质学报,80(9) :1474-1486
肖龙,徐义刚,梅厚钧等.2003. 云南金平晚二叠纪玄武岩特征及其与峨眉地幔柱关系:地球化学证据.岩石学报,19(1) :38-48
杨刚,杜安道,卢记仁等.2005. 金川镍-铜-铂矿床块状硫化物矿石的 RP-Os(ICP-MS)定年.中国科学(D 辑),35(3) :241-245
云南地矿局.1990. 云南区域地质志.北京:地质出版社,331-350
张成江,李晓林.1998. 峨眉山玄武岩的铂族元素地球化学特征.岩石学报,14(3) :297-304
张学书,秦德先,范柱国等.2005. 云南省金平白马寨铜镍矿区铁-超镁铁岩群地球化学特征.地质与勘探,41(4) :51-56
张宗清,杜安道,唐索寒等.2004. 金川铜镍硫化物矿床年龄和源区同位素地球化学特征.地质学报,78(3) :359-365
Bureau of Geology and Mineral Resources of Yunnan Province.1990. Regional Geology of Yunnan Province.Beijing:Geological Publishing House,331-350(in Chinese with English abstract)
Deng JF.1999. The sulphide Cu-Ni and Pt deposits in Yunnan.Geology of Yunnan,18(1) :22-35(in Chinese with English abstract)
Dong FL,Hon ZQ,Gao YF,et al.2005. Re-Os isotopic dating of molybdenite from Datongchang copper-lead-zinc deposit in Tengchong area,Western Yunnan
Du AD,He HL and Yin WN et al.1994. The study on the analytical methods of Re-Os age for molybdenites.Acta Geologica Sinica,68(4) :339-347(in Chinese with English abstract)
Jiang SY,Yang JH,Zhao KD,et al.2000. Re-Os isotope tracer and dating method in ore deposits research.Journal of Nanjing University(Natural Sciences Edition),36(6) :669-677(in Chinese with English abstract)
Lambert DD,Foster JG,Frick LR et al.1999. Re-Os isotope systematic of the Voisey's Bay Ni-Cu-Co magmatic ore system,Labrador,Canada.Lithos,47:69-88
Lambert DD,Frick LR,Foster JG et al.2000. Re-Os isotope systematic of the Voisey's Bay Ni-Cu-Co magmatic sulfide system,Labrador,Canada:Ⅱ.Implications for parental magma chemistry,oregenesis,and metal redistribution.Econ.Geol.,95(4) :867-888
Luo JL.1995. Metallogenic model of Pi,Cu-Ni and Cr deposits in Yunnan Province.Yunnan Geology,14(4) :311-318(in Chinese)
Luo ZH,Marakushev AA,Paniakh HH et al.2000. The origin of copper-nickle sulfide deposits(exemplified by Norilsk(Russia)and Jinchuan(China).Mineral Deposits,19(4) :330-339(in Chinese with English abstract)
Mao JW,Du AD.2001. 982Ma Re-Os isotopic age of Cu-Ni sulphide deposit and its geological implication from Baotan area,Guangxi province,China.Science in China(series D),31(12) :993-998
Mao JW,Stein H,Du AD et al.2004. Molybdenite Re-Os precise dating for molybdenite from Cu-Au-Mo deposits in the MiddleLower reaches of Yangtze River belt and its implications for mineralization.Acta Geologica Sinica,78(1) :121-131(in Chinese with English abstract)
Mao JW,Yang JM,Qu WJ et al.2002. Re-Os dating of Cu-Ni sulphide ores from Huangshandong deposit in Xinjiang and its geodynamic significance.Mineral Deposits,21(4) :323-330(in Chinese with English abstract)
Naldrett AJ.1981. Nickel sulfide deposits:Classification,composition,and genesis.Economic Geology 75th Anniversary,628-685
Song LJ,Wu CL,Zhu YJ et al.2005. Geochemical characteristics and mineralization of Baimazhai Cu-Ni sulfide deposit,Yunnan province.Geology and Prospecting,41(4) :39-46(in Chinese with English abstract)
Tang ZL.1996. The main mineralization mechanism of magma sulfide deposits in China.Acta Geologica Sinica,70(3) :237-243(in Chinese with English abstract)
Tao Y,Luo TY,Gao ZM et al.2004. The relation between Emeishan continental flood basalts and Cu-Ni deposits of southwestern China trap:A case study on Jinbaoshan mafic-ultramafic intrusion,Yunnan.Geological Review,50(1) :9-15(in Chinese with English abstract)
Walker RJ,Morgan JW,Hanski EJ et al.1997. Re-Os systematics of Early Proterozoic ferropicrites,Pechenga complex,northwestern Russia:evidence for ancient ~(187) Os enriched plumes.Geochim.Cosmochim.Acta,61:3145-3160
Walker RJ,Morgan JW,Horan MF et al.1994. Re-Os isotopic evidence for an enriched mantle source for the Noril'sk type ore bearing intrusions,Siberia.Geochim,Cosmochim.Acta,58:4179-4197
Wang CX.2000. On the Jinping fault block and it's mineral resources.Geology of Yunnan,21(3) :256-265(in Chinese with English abstract)
Wang SW,Sun XM,Shi GY et al.2006. Platinum group elements(PGE)geochemistry of Baimazhai Ni-Cu sulfide Deposit and its constraints on the ore genesis.Acta Geologica Sinica,80(9) :1474-1486(in Chinese with English abstract)
Xiao L,Xu YG,Mei HJ et al.2003. Late Permian flood basalts at Jinping area and its relation to Emei mantle plume:geochemical evidence.Acta Petrologica Sinica,19(10) :38-48(in Chinese with English abstract)
Yang G,Du AD,Lu JR et al.2005. Re-Os isotopic age dating of Cu-Ni-PGE sulphide deposit from Jinchuan area,Gansu province,China.Science in China(series D),35(3) :241-245
Zhang CJ,Li XL.1998. PGE geochemistry of the Emeishan basalt province.Acta Petrologica Sinica,14(3) :297-304(in Chinese with English abstract)
Zhang XS,Qin DX,Fan GZ et al.2005. Geochemical characteristics of mafic-ultramafic swarms in the Baimazhai nickel and copper deposit,Jinping,Yunuan.Geology and Prospecting,41(4) :51-56(in Chinese with English abstract)
Zhang ZQ,Du AD,Tang SH et al.2004. Age of the Jinchuan Cu-Ni sulphide deposit and isotopic geochemical feature of its source.Acta Geologica Sinica,78(3) :359-365(in Chinese with English abstract)
邓家藩.1999. 云南硫化物型铜镍和铂族矿床.云南地质,18(1) :22-35
董方浏,侯增谦,高永丰等.2005. 滇西腾冲大硐厂铜-铅-锌矿床的辉钼矿 Re-Os 同位素定年.矿床地质,24(6) :663-668
杜安道,何红蓼,殷宁万等.1994. 辉钼矿的铼-锇同位素地质年龄测定方法研究.地质学报,68(4) :339-347
蒋少涌,杨竞红,赵葵东等.2000. 金属矿床 Re-Os 同位素示踪与定年研究.南京大学学报(自然科学),36(6) :669-677
罗君烈.1995. 云南铂、铜镍、铬矿床的成矿模式.云南地质,14(4) :311-318
罗照华,马拉库舍夫 AA,潘妮娅 HA 等.2000. 铜镍硫化物矿床的成因--以诺里尔斯克(俄罗斯)和金川(中国)为例.矿床地质,19(4) :330-339
毛景文.Stein H,杜安道等.2004. 长江中下游地区铜金(钼)矿 Re-Os 年龄精测及其对成矿作用的指示.地质学报,78(1) :121-131
毛景文,杜安道.2001. 广西宅坛地区铜镍硫化物矿石982Ma Re-Os 同位素年龄及其地质意义.中国科学(D 辑),31(12) :993-998
毛景文,杨建民,屈文俊等.2002. 新疆黄山东铜镍硫化物矿床 Re-Os 同位素测定及其地球动力学意义.矿床地质,21:(4) :323-330
宋立军,吴冲龙,朱杰勇等.2005. 白马寨铜镍硫化矿地球化学特征及成矿.地质与勘探,41(4) :39-46
汤中立.1996. 中国岩浆硫化物矿床的主要成矿机制.地质学报,70(3) :237-243
陶琰,罗泰义,高振敏等.2004. 西南暗色岩铜镍硫化物矿化岩体与峨眉山玄武岩的关系-以云南金宝山岩体为例.地质论评,50(1) :9-15
王臣兴.2000. 金平断块及其矿产.云南地质,21(3) :256-265
王生伟,孙晓明,石贵勇等.2006. 云南白马寨铜镍硫化物矿床铂族元素地球化学及其对矿床成因的制约.地质学报,80(9) :1474-1486
肖龙,徐义刚,梅厚钧等.2003. 云南金平晚二叠纪玄武岩特征及其与峨眉地幔柱关系:地球化学证据.岩石学报,19(1) :38-48
杨刚,杜安道,卢记仁等.2005. 金川镍-铜-铂矿床块状硫化物矿石的 RP-Os(ICP-MS)定年.中国科学(D 辑),35(3) :241-245
云南地矿局.1990. 云南区域地质志.北京:地质出版社,331-350
张成江,李晓林.1998. 峨眉山玄武岩的铂族元素地球化学特征.岩石学报,14(3) :297-304
张学书,秦德先,范柱国等.2005. 云南省金平白马寨铜镍矿区铁-超镁铁岩群地球化学特征.地质与勘探,41(4) :51-56
张宗清,杜安道,唐索寒等.2004. 金川铜镍硫化物矿床年龄和源区同位素地球化学特征.地质学报,78(3) :359-365
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