江西上饶梨子坑火山盆地潜火山岩地球化学特征、锆石U-Pb年龄及其与铅锌矿成矿关系
|
摘要
本文研究了上饶梨子坑火山盆地分布最广的潜火山岩—花岗斑岩和流纹斑岩岩石学、岩石地球化学、稀土微量元素地球化学特征,并开展了锆石U-Pb定年。结果表明,周家矿区花岗斑岩体年龄为164.6±1.0 Ma,相当于晚侏罗世;蔡家坪和橙树坪矿区流纹斑岩的年龄分别为137.0±2.1 Ma、138.8±1.4 Ma,为早白垩世。结合区内潜火山岩的特征及其与铅锌矿在赋存空间、成矿时代、热液蚀变、物质来源等方面的关系,认为梨子坑火山盆地内的晚侏罗世—早白垩世的花岗斑岩和流纹斑岩是本区铅锌矿最重要的成矿母岩和赋矿岩体,这为本区今后的找矿指明了方向。
Studies on petrology,geochemistry and chronology for the granite-and rhyolite-porphyry,that are the most widely distributed in the Lizikeng Volcanic Basin,Shangrao,Jiangxi,carried out in this paper. Zircon U-Pb dating yielded an 165 ± 1Ma for Zhoujia granite-porphyry,137 ± 2Ma and 139 ± 1Ma for the rhyolite porphyries of Caijiaping and Chenshouping respectively,equivalent to the Late Jurassic and the Early Cretaceous respectively.Combined with the characteristics of the subvolcanic rocks and the relationship between granite- and rhyoliteporphyry and Pb—Zn mineralization in space,age,hydrothermal alteration and material sources,we suggested that the Late Jurassic—Early Cretaceous granite-and rhyolite-porphyry are the most important metallogenic source rocks and ore-hosting rocks,which indicates the ore-finding direction for the area in future.
Studies on petrology,geochemistry and chronology for the granite-and rhyolite-porphyry,that are the most widely distributed in the Lizikeng Volcanic Basin,Shangrao,Jiangxi,carried out in this paper. Zircon U-Pb dating yielded an 165 ± 1Ma for Zhoujia granite-porphyry,137 ± 2Ma and 139 ± 1Ma for the rhyolite porphyries of Caijiaping and Chenshouping respectively,equivalent to the Late Jurassic and the Early Cretaceous respectively.Combined with the characteristics of the subvolcanic rocks and the relationship between granite- and rhyoliteporphyry and Pb—Zn mineralization in space,age,hydrothermal alteration and material sources,we suggested that the Late Jurassic—Early Cretaceous granite-and rhyolite-porphyry are the most important metallogenic source rocks and ore-hosting rocks,which indicates the ore-finding direction for the area in future.
引文
代堰锫,余心起,吴淦国.2010.江西上饶蔡家坪铅锌矿床硫化物特征及F4断裂的Ar-Ar年龄*.矿床地质,29(增刊):425~426.
狄永军,徐贻赣,吴淦国.2013.江西冷水坑银铅锌矿田推覆构造的形成时代:来自年代学的约束.地学前缘,20(4):340~349.
付建明,马昌前,谢才富,张业明,彭松柏.2004.湖南骑田岭岩体东缘菜岭岩体的锆石SHRIMP定年及其意义.中国地质,31(1):96~100.
毛景文,陈懋弘,袁顺达.2011.华南地区钦杭成矿带地质特征和矿床时空分布规律.地质学报,85(5):636~658.
孟祥金,董光裕,刘建光等.江西冷水坑斑岩型铅锌银矿床.北京:地质出版社,2007.
孟祥金,候增谦,董光裕.2009.江西冷水坑斑岩型铅锌银矿床地质特征、热液蚀变与成矿时限.地质学报,83(12):1951~1967.
彭建堂,胡瑞忠,毕献武,戴橦谟,李兆丽,李晓敏,双燕,袁顺达,刘世荣.2007.湖南芙蓉锡矿床40Ar/39Ar同位素年龄及地质意义.矿床地质,26(3):237~248.
舒良树,邓平,于津海.2008.武夷山西缘流纹岩的形成时代及其地球化学特征.中国科学D辑:地球科学,38(8):950~959.
宋彪,张玉海,万渝生.2002.锆石SHRIMP样品靶制作?年龄测定及有关现象讨论.地质论评,5(增刊):26~30.
王登红,陈郑辉,陈毓川.2010.我国重要矿产地成岩成矿年代学研究新数据.地质学报,84(7):030~1040.
王明义.1995.武夷山西坡成矿花岗岩的蚀变分带及地表矿化特征.江西地质,124~131.
吴淦国,张达,彭润民.2004.东南沿海成矿带金属矿床形成时间演化规律研究.地学前缘,11(1):237~247.
杨明桂,王昆.1994.江西省地质构造格架及地壳演化.江西地质,8(4):239~250.
袁顺达,刘晓菲,王旭东,吴胜华,原垭斌,李雪凯,王铁柱.2012b.湘南红旗岭锡多金属矿床地质特征及Ar-Ar同位素年代学研究.岩石学报,28(12):3787~3797.
袁顺达,张东亮,双燕,杜安道,屈文俊.2012a.湘南新田岭大型钨钼矿床辉钼矿Re-Os同位素测年及其地质意义.岩石学报,28(1):27~38.
张家菁,吴木森,陈郑辉.2009.江西省上饶县金竹坪钼多金属矿床成矿年代学研究.岩矿测试,28(3):228~232.
张家菁,张永忠,罗国辉,刘消清.2006.江西上饶焦塘地区铅锌(银铜)成矿地质特征及成因初探.第八届全国矿床会议论文集,287~292.
赵葵东,蒋少涌,姜耀辉,刘敦一.2006.湘南骑田岭岩体芙蓉超单元的锆石SHRIMP U-Pb年龄及其地质意义.岩石学报,25(10):2611~2616.
朱金初,黄革非,张佩华,李福春,饶冰.2003.湖南骑田岭岩体菜岭超单元花岗岩侵位年龄和物质来源研究.地质论评,46(3):245~252.
朱金初,王汝成,张佩华,谢才富,张文兰,赵葵东,谢磊,杨策,车旭东,于阿朋,王禄彬.2009.南岭中段骑田岭花岗岩基的锆石UPb年代学格架.中国科学(D辑),39(8):1112~1127.
朱金初,张辉,谢才富,张佩华,杨策.2005.湘南骑田岭竹枧水花岗岩的锆石SHRIMP U-Pb年代学和岩石学.高校地质学报,11(3):335~342.
Ludwig K R.2001.Squid 1.02:A user’s manual:BerkeleyGeochronology Center Special Publication No.2:15~35.
Ludwig K R.2003.User's manual for Isoplot 3.00:A geochronologicaltoolkit for Microsoft Excel:Berkeley Geochronology Center SpecialPublication No.4:1~70.
Mao Jinwen,Li X F,Chen W,Lan X M and Wei S L.2004.Geologicalcharacteristics of the Furong tin orefield,Hunan,40Ar-39Ar datingof tin ores and related granite and its geodynamic significance forrock and ore formation.Acta Geologica Sinica,78(2):481~491.
Sun S S and McDonough W F.1998.Chemical and isotopic systematicsof oceanic basalts:implications for mantle composition andprocesses.//Sunders,A.D.,Norry,M.J.Magmatism in theOcean Basins,Special Publications,London,42:313~345.
Williams I S.1998.U Th Pb geochronology by ion microprobe.In:McKibben M A,SahnksⅢW C,Ridley W I.Eds.MineralizingProcesses.Reviews in Economic Geology,7:1~35.
Yuan S D,Peng JT,Hao S,Li HM,Geng J Z and Zhang D L.2011.Insitu LA-MC-ICP-MS and ID-TIMS U-Pb geochronology ofcassiteritein the giant Furong tin deposit,Hunan Province,SouthChina:New constraints on the timing of tin—polymetallicmineralization.Ore Geology Reviews,43:235~242.
Yuan S D,Peng JT,Li HM,Shen NP,Zhang DL.2008.A precise UPb age on cassiterite from the Xianghualing tin—polymetallic deposit(Hunan,South China).Mineralium Deposita,43:375~382.
Yuan S D,Peng JT,Shen NP,Hu RZ and Dai TM.2007.40Ar-39Arisotopic dating of the Xianghualing tin—polymetallic orefield inSouthern Hunnan and its geological implications.Acta GeologicaSinica,81(2):278~286.
狄永军,徐贻赣,吴淦国.2013.江西冷水坑银铅锌矿田推覆构造的形成时代:来自年代学的约束.地学前缘,20(4):340~349.
付建明,马昌前,谢才富,张业明,彭松柏.2004.湖南骑田岭岩体东缘菜岭岩体的锆石SHRIMP定年及其意义.中国地质,31(1):96~100.
毛景文,陈懋弘,袁顺达.2011.华南地区钦杭成矿带地质特征和矿床时空分布规律.地质学报,85(5):636~658.
孟祥金,董光裕,刘建光等.江西冷水坑斑岩型铅锌银矿床.北京:地质出版社,2007.
孟祥金,候增谦,董光裕.2009.江西冷水坑斑岩型铅锌银矿床地质特征、热液蚀变与成矿时限.地质学报,83(12):1951~1967.
彭建堂,胡瑞忠,毕献武,戴橦谟,李兆丽,李晓敏,双燕,袁顺达,刘世荣.2007.湖南芙蓉锡矿床40Ar/39Ar同位素年龄及地质意义.矿床地质,26(3):237~248.
舒良树,邓平,于津海.2008.武夷山西缘流纹岩的形成时代及其地球化学特征.中国科学D辑:地球科学,38(8):950~959.
宋彪,张玉海,万渝生.2002.锆石SHRIMP样品靶制作?年龄测定及有关现象讨论.地质论评,5(增刊):26~30.
王登红,陈郑辉,陈毓川.2010.我国重要矿产地成岩成矿年代学研究新数据.地质学报,84(7):030~1040.
王明义.1995.武夷山西坡成矿花岗岩的蚀变分带及地表矿化特征.江西地质,124~131.
吴淦国,张达,彭润民.2004.东南沿海成矿带金属矿床形成时间演化规律研究.地学前缘,11(1):237~247.
杨明桂,王昆.1994.江西省地质构造格架及地壳演化.江西地质,8(4):239~250.
袁顺达,刘晓菲,王旭东,吴胜华,原垭斌,李雪凯,王铁柱.2012b.湘南红旗岭锡多金属矿床地质特征及Ar-Ar同位素年代学研究.岩石学报,28(12):3787~3797.
袁顺达,张东亮,双燕,杜安道,屈文俊.2012a.湘南新田岭大型钨钼矿床辉钼矿Re-Os同位素测年及其地质意义.岩石学报,28(1):27~38.
张家菁,吴木森,陈郑辉.2009.江西省上饶县金竹坪钼多金属矿床成矿年代学研究.岩矿测试,28(3):228~232.
张家菁,张永忠,罗国辉,刘消清.2006.江西上饶焦塘地区铅锌(银铜)成矿地质特征及成因初探.第八届全国矿床会议论文集,287~292.
赵葵东,蒋少涌,姜耀辉,刘敦一.2006.湘南骑田岭岩体芙蓉超单元的锆石SHRIMP U-Pb年龄及其地质意义.岩石学报,25(10):2611~2616.
朱金初,黄革非,张佩华,李福春,饶冰.2003.湖南骑田岭岩体菜岭超单元花岗岩侵位年龄和物质来源研究.地质论评,46(3):245~252.
朱金初,王汝成,张佩华,谢才富,张文兰,赵葵东,谢磊,杨策,车旭东,于阿朋,王禄彬.2009.南岭中段骑田岭花岗岩基的锆石UPb年代学格架.中国科学(D辑),39(8):1112~1127.
朱金初,张辉,谢才富,张佩华,杨策.2005.湘南骑田岭竹枧水花岗岩的锆石SHRIMP U-Pb年代学和岩石学.高校地质学报,11(3):335~342.
Ludwig K R.2001.Squid 1.02:A user’s manual:BerkeleyGeochronology Center Special Publication No.2:15~35.
Ludwig K R.2003.User's manual for Isoplot 3.00:A geochronologicaltoolkit for Microsoft Excel:Berkeley Geochronology Center SpecialPublication No.4:1~70.
Mao Jinwen,Li X F,Chen W,Lan X M and Wei S L.2004.Geologicalcharacteristics of the Furong tin orefield,Hunan,40Ar-39Ar datingof tin ores and related granite and its geodynamic significance forrock and ore formation.Acta Geologica Sinica,78(2):481~491.
Sun S S and McDonough W F.1998.Chemical and isotopic systematicsof oceanic basalts:implications for mantle composition andprocesses.//Sunders,A.D.,Norry,M.J.Magmatism in theOcean Basins,Special Publications,London,42:313~345.
Williams I S.1998.U Th Pb geochronology by ion microprobe.In:McKibben M A,SahnksⅢW C,Ridley W I.Eds.MineralizingProcesses.Reviews in Economic Geology,7:1~35.
Yuan S D,Peng JT,Hao S,Li HM,Geng J Z and Zhang D L.2011.Insitu LA-MC-ICP-MS and ID-TIMS U-Pb geochronology ofcassiteritein the giant Furong tin deposit,Hunan Province,SouthChina:New constraints on the timing of tin—polymetallicmineralization.Ore Geology Reviews,43:235~242.
Yuan S D,Peng JT,Li HM,Shen NP,Zhang DL.2008.A precise UPb age on cassiterite from the Xianghualing tin—polymetallic deposit(Hunan,South China).Mineralium Deposita,43:375~382.
Yuan S D,Peng JT,Shen NP,Hu RZ and Dai TM.2007.40Ar-39Arisotopic dating of the Xianghualing tin—polymetallic orefield inSouthern Hunnan and its geological implications.Acta GeologicaSinica,81(2):278~286.