云南普朗斑岩型铜矿床外围斑岩体成因探讨
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摘要
普朗超大型斑岩型铜矿床为西南"三江"成矿带中最大的铜矿床,位于义敦岛弧带南端格咱弧东南部,是甘孜-理塘洋壳向西俯冲的产物。以往地质工作多基于矿区首采区I号复式岩体,而对其外围岩体的相关研究工作极为薄弱。对普朗斑岩铜矿床外围东部及北部斑岩体的岩石学、岩石地球化学特征进行了研究,结果表明:岩石属于准铝质钙碱性系列;具有埃达克岩亲和性,源区物质部分熔融与埃达克岩有关;成因类型为I型花岗岩,岩浆主要来源于深部,具有壳幔混合的特征,岩浆分异程度较高,岩浆演化过程同时受部分熔融和分离结晶作用控制,伴有一定程度的同化混染作用。与普朗首采区I号岩体对比,具有相似的构造环境和成因类型,为同成因岩浆活动的产物。
The Pulang super large porphyry copper deposit is the largest copper deposit in the southwestern Sanjiang metallogenic belt,located at the southeast of the Geza arc of south Yidun island arc belt,which is aproduct of Ganzi-Litang oceanic crust westward subduction.The previous geological work was done mostly based on I composite rock body,but the research of porphyry body in the periphery of Pulang is extremely weak.This paper studies the petrology and petrological geochemistry characteristics of the porphyry body.The result shows that the porphyry belongs to quasi-aluminous rock and calc-alkaline series with the affinity of Adakite,and the partial melting of source materials is related to Adakite.Porphyry body genetic type is I-type granite,in which the magma is mainly derived from the deep part,with the characteristics of crust-mantle mixing and higher degree of differentiation.The magma evolution process is controlled by partial melting and fractional crystallization,accompanied by a certain degree of assimilation-contamination.The comparison of the Pulang mining area indicates thatit has similar tectonic setting and genetic type to Pulang mining area.They are both the products of isogenesis magmatism.
The Pulang super large porphyry copper deposit is the largest copper deposit in the southwestern Sanjiang metallogenic belt,located at the southeast of the Geza arc of south Yidun island arc belt,which is aproduct of Ganzi-Litang oceanic crust westward subduction.The previous geological work was done mostly based on I composite rock body,but the research of porphyry body in the periphery of Pulang is extremely weak.This paper studies the petrology and petrological geochemistry characteristics of the porphyry body.The result shows that the porphyry belongs to quasi-aluminous rock and calc-alkaline series with the affinity of Adakite,and the partial melting of source materials is related to Adakite.Porphyry body genetic type is I-type granite,in which the magma is mainly derived from the deep part,with the characteristics of crust-mantle mixing and higher degree of differentiation.The magma evolution process is controlled by partial melting and fractional crystallization,accompanied by a certain degree of assimilation-contamination.The comparison of the Pulang mining area indicates thatit has similar tectonic setting and genetic type to Pulang mining area.They are both the products of isogenesis magmatism.
引文
[1]曹康,许继峰,陈建林,等.云南普朗超大型斑岩铜矿床含矿斑岩成因及其成矿意义[J].矿床地质,2014,33(2):307-322.
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[3]郭欣,杜杨松,庞振山,等.云南普朗斑岩铜矿蚀变带成矿流体特征及其成矿意义[J].现代地质,2009,23(3):465-471.
[4]李文昌,尹光候,卢映祥,等.中甸普朗复式斑岩体演化及40 Ar-39 Ar同位素依据[J].地质学报,2009,83(10):1421-1429.
[5]李文昌,尹光侯,余海军,等.滇西北格咱火山-岩浆弧斑岩成矿作用[J].岩石学报,2011,27(9):2541-2552.
[6]李文昌,刘学龙.云南普朗斑岩型铜矿田构造岩相成矿规律与控矿特征[J].地学前缘,2015,22(4):53-66.
[7]刘学龙,李文昌,尹光侯,等.云南省格咱岛弧印支期岩浆演化及普朗斑岩型铜矿成矿作用[J].地质学报,2012,86(12):1933-1945.
[8]刘学龙,李文昌,尹光侯,等.云南格咱岛弧普朗斑岩型铜矿年代学、岩石矿物学及地球化学研究[J].岩石学报,2013,29(9):3049-3064.
[9]庞振山,杜杨松,王功文,等.云南普朗复式岩体地质地球化学特征及成因[J].地质通报,2009,28(4):531-537.
[10]任江波,许继峰,陈建林,等.“三江”地区中甸弧普朗成矿斑岩地球化学特征及其成因[J].矿物岩石学杂志,2011,30(4):581-592.
[11]谭康华,李光军,黄定柱,等.普朗大型斑岩铜矿控矿条件[J].云南地质,2005,24(2):167-174.
[12]王守旭,张兴春,冷成彪,等.滇西北中甸普朗斑岩铜矿床地球化学与成矿机理初探[J].矿床地质,2007,26(3):277-288.
[13]王凯,杨帆,李峰,等.云南普朗斑岩铜矿床热液蚀变及脉体系统研究[J].地质与勘探,2016,52(3):417-428.
[14]冷成彪,张兴春,王守旭,等.云南中甸地区两个斑岩铜矿容矿斑岩的地球化学特征:以雪鸡坪和普朗斑岩铜矿床为例[J].矿物学报,2007,27(增刊1):414-422.
[15]曾普胜,李文昌,王海平,等.云南普朗印支期超大型斑岩铜矿床:岩石学及年代学特征[J].岩石学报,2006,22(4):989-1000.
[16]Li N,Ulrich T,Chen Y J,et al.Fluid evolution of the Yuchiling porphyry Mo deposit,East Qinling,China[J].Ore Geology Reviews,2012,48(5):442-459.
[17]Richards J P.Magmatic to hydrothermal metal fluxes in convergent and collided margins[J].Ore Geology Reviews,2011,40(1):1-26.
[18]Sillitoe R H.Porphyry copper systems[J].Economic Geology,2010,105(1):3-41.
[19]Tosdal R M,Richards J P.Magmatic and structural controls on the development of porphyry Cu-Mo-Au deposits[J].Economic Geology,2001,96(9):157-181.
[20]Lowell J D,Guilbert J M.Lateral and vertieal alteration mineralization zoning in porphyry ore deposits[J].Economic Geology,1970,65(4):373-408.
[21]Chappel B W,White A J R.Two contrasting granite types[J].Pacific Geology,1974,8:173-174.
[22]Abdelrahman A M.Nature of biotites from alkaline,calc-alkaline and peraluminous magmas[J].Journal of Petrology,1994,35(2):525-541.
[23]Whalen J B,Chappell B W.Opaque mineralogy and maficmineral chemistry of I-type and S-type granites of Lachlan fold belt,southeast Australia[J].American Mineralogist,1988,73(3/4):281-296.
[24]Chappell B W.Aluminium saturation in I-type granites and the characterization of fractionated hapiograntites[J].Lithos,1999,46(3):535-551.
[25]Alther R,Holl A,Hegner E,et al.High-potassium,calc-alkaline I-type plutonism in the European Variscides:Northern Vosges(France)and northern Schwarzwald(Germany)[J].Lithos,2000,50(1):51-73.
[26]Nielsen R L.Hypogene texture and mineral zoning in a copper bearing granodiorite porphyry stock,SantaRita,New Mexico[J].Economic Geology,1968,63(1):37-50.
[27]骆庭川.稀土元素地球化学在花岗岩类研究中的意义[J].地质科技情报,1986,5(2):140-146.
[28]Defant M J,Drummond M S.Derivation of some modern arc magmas by melting of young subducted lithosphere[J].Nature,1990,347:662-665.
[29]曲晓明,江军华,辛洪波,等.西藏冈底斯造山带几乎同时形成的两套埃达克岩为什么一套含矿一套不含矿?[J].矿床地质,2010,29(3):381-394.
[30]Sillitoe R H.A plate tectonic model for the origin of porphyry copper deposits[J].Economic Geology,1972,67(2):184-197.
[31]White D E.Environments of generation of some basemetal ore deposits[J].Economic Geology,1968,63(4):301-335.
[32]邱家骤,林景仟.岩石化学[M].北京:地质出版社,1991.
[2]陈玲.云南普朗超大型斑岩铜矿床成矿岩浆特征及构造背景分析[D].广州:中国科学院研究生院(广州地球化学研究所),2016.
[3]郭欣,杜杨松,庞振山,等.云南普朗斑岩铜矿蚀变带成矿流体特征及其成矿意义[J].现代地质,2009,23(3):465-471.
[4]李文昌,尹光候,卢映祥,等.中甸普朗复式斑岩体演化及40 Ar-39 Ar同位素依据[J].地质学报,2009,83(10):1421-1429.
[5]李文昌,尹光侯,余海军,等.滇西北格咱火山-岩浆弧斑岩成矿作用[J].岩石学报,2011,27(9):2541-2552.
[6]李文昌,刘学龙.云南普朗斑岩型铜矿田构造岩相成矿规律与控矿特征[J].地学前缘,2015,22(4):53-66.
[7]刘学龙,李文昌,尹光侯,等.云南省格咱岛弧印支期岩浆演化及普朗斑岩型铜矿成矿作用[J].地质学报,2012,86(12):1933-1945.
[8]刘学龙,李文昌,尹光侯,等.云南格咱岛弧普朗斑岩型铜矿年代学、岩石矿物学及地球化学研究[J].岩石学报,2013,29(9):3049-3064.
[9]庞振山,杜杨松,王功文,等.云南普朗复式岩体地质地球化学特征及成因[J].地质通报,2009,28(4):531-537.
[10]任江波,许继峰,陈建林,等.“三江”地区中甸弧普朗成矿斑岩地球化学特征及其成因[J].矿物岩石学杂志,2011,30(4):581-592.
[11]谭康华,李光军,黄定柱,等.普朗大型斑岩铜矿控矿条件[J].云南地质,2005,24(2):167-174.
[12]王守旭,张兴春,冷成彪,等.滇西北中甸普朗斑岩铜矿床地球化学与成矿机理初探[J].矿床地质,2007,26(3):277-288.
[13]王凯,杨帆,李峰,等.云南普朗斑岩铜矿床热液蚀变及脉体系统研究[J].地质与勘探,2016,52(3):417-428.
[14]冷成彪,张兴春,王守旭,等.云南中甸地区两个斑岩铜矿容矿斑岩的地球化学特征:以雪鸡坪和普朗斑岩铜矿床为例[J].矿物学报,2007,27(增刊1):414-422.
[15]曾普胜,李文昌,王海平,等.云南普朗印支期超大型斑岩铜矿床:岩石学及年代学特征[J].岩石学报,2006,22(4):989-1000.
[16]Li N,Ulrich T,Chen Y J,et al.Fluid evolution of the Yuchiling porphyry Mo deposit,East Qinling,China[J].Ore Geology Reviews,2012,48(5):442-459.
[17]Richards J P.Magmatic to hydrothermal metal fluxes in convergent and collided margins[J].Ore Geology Reviews,2011,40(1):1-26.
[18]Sillitoe R H.Porphyry copper systems[J].Economic Geology,2010,105(1):3-41.
[19]Tosdal R M,Richards J P.Magmatic and structural controls on the development of porphyry Cu-Mo-Au deposits[J].Economic Geology,2001,96(9):157-181.
[20]Lowell J D,Guilbert J M.Lateral and vertieal alteration mineralization zoning in porphyry ore deposits[J].Economic Geology,1970,65(4):373-408.
[21]Chappel B W,White A J R.Two contrasting granite types[J].Pacific Geology,1974,8:173-174.
[22]Abdelrahman A M.Nature of biotites from alkaline,calc-alkaline and peraluminous magmas[J].Journal of Petrology,1994,35(2):525-541.
[23]Whalen J B,Chappell B W.Opaque mineralogy and maficmineral chemistry of I-type and S-type granites of Lachlan fold belt,southeast Australia[J].American Mineralogist,1988,73(3/4):281-296.
[24]Chappell B W.Aluminium saturation in I-type granites and the characterization of fractionated hapiograntites[J].Lithos,1999,46(3):535-551.
[25]Alther R,Holl A,Hegner E,et al.High-potassium,calc-alkaline I-type plutonism in the European Variscides:Northern Vosges(France)and northern Schwarzwald(Germany)[J].Lithos,2000,50(1):51-73.
[26]Nielsen R L.Hypogene texture and mineral zoning in a copper bearing granodiorite porphyry stock,SantaRita,New Mexico[J].Economic Geology,1968,63(1):37-50.
[27]骆庭川.稀土元素地球化学在花岗岩类研究中的意义[J].地质科技情报,1986,5(2):140-146.
[28]Defant M J,Drummond M S.Derivation of some modern arc magmas by melting of young subducted lithosphere[J].Nature,1990,347:662-665.
[29]曲晓明,江军华,辛洪波,等.西藏冈底斯造山带几乎同时形成的两套埃达克岩为什么一套含矿一套不含矿?[J].矿床地质,2010,29(3):381-394.
[30]Sillitoe R H.A plate tectonic model for the origin of porphyry copper deposits[J].Economic Geology,1972,67(2):184-197.
[31]White D E.Environments of generation of some basemetal ore deposits[J].Economic Geology,1968,63(4):301-335.
[32]邱家骤,林景仟.岩石化学[M].北京:地质出版社,1991.
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