广西大厂锌铜矿方解石稀土元素地球化学特征
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摘要
方解石是广西大厂矿区常见的脉石矿物。测试了拉么矽卡岩型锌铜矿和铜坑矿床深部矽卡岩型锌铜矿方解石稀土含量,锌铜矿的稀土元素总含量普遍较低,稀土元素总量(ΣREE)=11.15×10~(-6)～16.17×10~(-6),具有明显的有铕正异常,铕异常(δEu)为1.46～2.80,且轻重稀土分馏明显,轻稀土元素(LREE)/重稀土元素(HREE)为2.63～6.84,配分模式为具有铕正异常的轻稀土富集右倾型模式,这样的配分模式与锡多金属矿方解石稀土元素配分模式相似,暗示两者之间可能为同源不同阶段产物;且研究表明成矿流体来源为龙箱盖岩体岩浆结晶期后分异出的岩浆热液,成矿环境为还原环境过渡向氧化环境。
Calcite is a common gangue mineral in Dachang mining area.Previous studies on calcite of tin polymetallic ore in the upper part of the region are detailed,but the research on sandbergerite in the lower part has not been carried out.The calcite rare earth element content of Lamu skarn type sandbergerite and the skarn type of deep pit of Tongkeng deposit were tested.The results show that total content of the rare-earth element in sandbergerite are generally lower,total rare earth elements(ΣREE)is 11.15×10~(-6)～16.17×10~(-6),europium has positive anomaly,europium anomalies(δEu)is 1.46～2.80,and light and heavy rare earth obvious fractionation,light rare earth element(LREE)/heavy rare earth element(HREE)is 2.63～6.84,distribution patterns with europium is abnormal enrichment of light rare earth right model,the distribution patterns and tin polymetallic calcite distribution patterns of rare earth elements are similar,which implies that they may be products of different stages of the same origin.The mineralization fluid is derived from magmatic hydrothermal fluid of longbulid magmatic crystallization period,and the mineralization environment is the transition from reduction environment to oxidation environment.
Calcite is a common gangue mineral in Dachang mining area.Previous studies on calcite of tin polymetallic ore in the upper part of the region are detailed,but the research on sandbergerite in the lower part has not been carried out.The calcite rare earth element content of Lamu skarn type sandbergerite and the skarn type of deep pit of Tongkeng deposit were tested.The results show that total content of the rare-earth element in sandbergerite are generally lower,total rare earth elements(ΣREE)is 11.15×10~(-6)～16.17×10~(-6),europium has positive anomaly,europium anomalies(δEu)is 1.46～2.80,and light and heavy rare earth obvious fractionation,light rare earth element(LREE)/heavy rare earth element(HREE)is 2.63～6.84,distribution patterns with europium is abnormal enrichment of light rare earth right model,the distribution patterns and tin polymetallic calcite distribution patterns of rare earth elements are similar,which implies that they may be products of different stages of the same origin.The mineralization fluid is derived from magmatic hydrothermal fluid of longbulid magmatic crystallization period,and the mineralization environment is the transition from reduction environment to oxidation environment.
引文
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9王登红,陈毓川,陈文,等.广西南丹大厂超大型锡多金属矿床的成矿时代[J].地质学报,2004,78(1):132-138Wang Denghong,Chen Yuchuan,Chen Wen,et al.Metallogenic era of superlarge tin polymetallic deposit in Dachang,Nandan,Guangxi[J].Acta Geologica Sinica,2004,78(1):132-138
10梁婷,王登红,屈文俊,等.广西大厂锡多金属矿床方解石的REE地球化学特征[J].岩石学报,2007,23(10):2493-2503Liang Ting,Wang Denghong,Qu Wenjun,et al.REE geochemical characteristics of calcite in Dachang tin polymetallic deposit in Guangxi[J].Acta Petrologica Sinica,2007,23(10):2493-2503
11 Qi L,Hu J,Gregoire D C.Determination of trace elements in granites by inductively coupled plasma mass spectrometry[J].Talanta,2000,51:507-513
12 Taylor S R,Mclennan S M.The continental crust:its composition and evolution,an examination of the geochemical record preserved in sedimentary rocks[M].London:Blackwell Scientific Pub,Oxford Press,1985
13 Wood S A.The aqueous geochemistry of the rare-earth elements and yttrium:2.theoretical predictions of speciation in hydrothermal solutions to 350℃at saturation water vapor,pressure[J].Chemical Geology,1990,82(1):159-186
14 Terakado Y,Masuda A.The coprecipitation of rare-earth elements with calcite and aragonite[J].Chemical Geology,1988,69:103-110
15 Haas J R,Shock E L,Sassani D C.Rare earth elements in hydrothermal systems:estimates of standard partial molal thermodynamicproperties of aqueous complexes of the rare earth elements at high pressures and temperatures[J].Geochimica et Cosmochimica Acta,1995,59:4329-4350
16 Lottermoser B G.Rare-earth elements and hydrothermal ore formation processes[J].Ore Geology Reviews,1992,7:25-41
17 Cantrell K J,Byrne R H.Rare earth element complexation by carbonate and oxalate ions[J].Geochimica Et Cosmochimica Acta,1987,51:597-605
18双燕,毕献武,胡瑞忠,等.芙蓉锡矿方解石稀土元素地球化学特征及其对成矿流体来源的指示[J].矿物岩石,2006,25(2):57-65Shuang Yan,Bi Xianwu,Hu Ruizhong,et al.Geochemical characteristics of calcite rare earth elements in furong tin mine and their indication of the source of ore-forming fluid[J].Journal of Mineralogy and Petrology,2006,25(2):57-65
19 Zhong S,Mucci A.Partitioning of rare earth elements(REEs)between calcite and seawater solutions at 25℃and 1 atm,and highdissolved REE concentration[J].Geochimica et Cosmochimica Acta,1995,59:443-453
20 Rimstidt J D,Balog A,Webb J.Distribution of trace elements between carbonate minerals and aqueous solutions[J].Geochimica et Cosmochimica Acta,1998,62:1851-1863
21 Bau M,Dulski P.Comparative study of yttrium and rare-earth element behaviours in fluorine-rich hydrothermal fluids[J].Contrib Mineral Petrol,1995,119:213-223
22 Michard A.Rare earth element systematics in hydrothermal fluids[J].Geochim.Cosmochim Acta,1989,53:745-750
23王登红,李华芹,陈毓川,等.桂西北南丹地区大厂超大型锡多金属矿床中发现高稀土元素方解石[J].地质通报,2005,24(2):176-180Wang Denghong,Li Huaqin,Chen Yuchuan,et al.Discovery of high rare earth calcite in Dachang super-large tin polymetallic deposit in Nandan region,northwest Guangxi[J].Geological Bulletin of China,2005,24(2):176-180
2蔡明海,何龙清,刘国庆,等.广西大厂锡矿田侵入岩SHRIMP锆石U-Pb年龄及其意义[J].地质论评,2006,52(3):409-414Cai Minghai,He Longqing,Liu Guoqing,et al.SHRIMP zircon U-Pb dating of the intrusive rocks in the Dachang tin polymetallic ore field,Guangxi and their geological significance[J].Geological Review,2006,52(3):409-414
3蔡明海,梁婷,韦可利,等.大厂锡多金属矿田铜坑-长坡92号矿体Rb-Sr测年及其地质意义[J].华南地质与矿产,2006(2):31-36Cai Minghai,Liang Ting,Wei Keli,et al.Dating and geological significance of ore body Rb-Sr in Tongkeng-Changpo No.92 ore field in Dachang tin polymetallic ore field[J].Geology and Mineral in South China,2006(2):31-36
4陈毓川,黄民智,徐珏,等.大厂锡石-硫化物多金属矿带地质特征及成矿系列[J].地质学报,1985,59(3):228-240Chen Yuchuan,Huang Minzhi,Xu Jue,et al.Geological features and metallogenic series of the Dachang cassiterite-sulfide-polymetallic belt[J].Acta Geologica Sinica,1985,59(3):228-240
5陈毓川,黄民智,徐钰,等.大厂锡矿地质[M].北京:地质出版社,1993Chen Yuchuan,Huang Minzhi,Xu Jue,et al.Geology of Dachang tin mine[M].Beijing:Geological Publishing Press,1993
6陈骏.论华南层控锡矿的地质特征与形成机制[J].地质论评,1988,34(6):524-532Chen Jun.Geological characteristics and formation mechanism of south China stratified tin deposit[J].Geological Review,1988,34(6):524-532
7涂光炽.锡和铅锌成矿作用的若干问题---在冶金部地质研究所1983年学术年会上的讲话[J].矿产与地质,1984(1):4-14Tu Guangzhi.Several issues of tin and lead-zinc mineralization:presentation at the 1983 academic annual meeting of the institute of geology,ministry of metallurgy[J].Mineral Resources and Geology,1984(1):4-14
8丁悌平,彭子成,黎红,等.南岭地区几个典型矿床的稳定同位素研究[M].北京:北京科学技术出版社,1988Ding Tiping,Peng Zicheng,Li Hong,et al.Isotopic stability of several typical deposits in Nanling Area[M].Beijing:Beijing Science and Technology Press,1988
9王登红,陈毓川,陈文,等.广西南丹大厂超大型锡多金属矿床的成矿时代[J].地质学报,2004,78(1):132-138Wang Denghong,Chen Yuchuan,Chen Wen,et al.Metallogenic era of superlarge tin polymetallic deposit in Dachang,Nandan,Guangxi[J].Acta Geologica Sinica,2004,78(1):132-138
10梁婷,王登红,屈文俊,等.广西大厂锡多金属矿床方解石的REE地球化学特征[J].岩石学报,2007,23(10):2493-2503Liang Ting,Wang Denghong,Qu Wenjun,et al.REE geochemical characteristics of calcite in Dachang tin polymetallic deposit in Guangxi[J].Acta Petrologica Sinica,2007,23(10):2493-2503
11 Qi L,Hu J,Gregoire D C.Determination of trace elements in granites by inductively coupled plasma mass spectrometry[J].Talanta,2000,51:507-513
12 Taylor S R,Mclennan S M.The continental crust:its composition and evolution,an examination of the geochemical record preserved in sedimentary rocks[M].London:Blackwell Scientific Pub,Oxford Press,1985
13 Wood S A.The aqueous geochemistry of the rare-earth elements and yttrium:2.theoretical predictions of speciation in hydrothermal solutions to 350℃at saturation water vapor,pressure[J].Chemical Geology,1990,82(1):159-186
14 Terakado Y,Masuda A.The coprecipitation of rare-earth elements with calcite and aragonite[J].Chemical Geology,1988,69:103-110
15 Haas J R,Shock E L,Sassani D C.Rare earth elements in hydrothermal systems:estimates of standard partial molal thermodynamicproperties of aqueous complexes of the rare earth elements at high pressures and temperatures[J].Geochimica et Cosmochimica Acta,1995,59:4329-4350
16 Lottermoser B G.Rare-earth elements and hydrothermal ore formation processes[J].Ore Geology Reviews,1992,7:25-41
17 Cantrell K J,Byrne R H.Rare earth element complexation by carbonate and oxalate ions[J].Geochimica Et Cosmochimica Acta,1987,51:597-605
18双燕,毕献武,胡瑞忠,等.芙蓉锡矿方解石稀土元素地球化学特征及其对成矿流体来源的指示[J].矿物岩石,2006,25(2):57-65Shuang Yan,Bi Xianwu,Hu Ruizhong,et al.Geochemical characteristics of calcite rare earth elements in furong tin mine and their indication of the source of ore-forming fluid[J].Journal of Mineralogy and Petrology,2006,25(2):57-65
19 Zhong S,Mucci A.Partitioning of rare earth elements(REEs)between calcite and seawater solutions at 25℃and 1 atm,and highdissolved REE concentration[J].Geochimica et Cosmochimica Acta,1995,59:443-453
20 Rimstidt J D,Balog A,Webb J.Distribution of trace elements between carbonate minerals and aqueous solutions[J].Geochimica et Cosmochimica Acta,1998,62:1851-1863
21 Bau M,Dulski P.Comparative study of yttrium and rare-earth element behaviours in fluorine-rich hydrothermal fluids[J].Contrib Mineral Petrol,1995,119:213-223
22 Michard A.Rare earth element systematics in hydrothermal fluids[J].Geochim.Cosmochim Acta,1989,53:745-750
23王登红,李华芹,陈毓川,等.桂西北南丹地区大厂超大型锡多金属矿床中发现高稀土元素方解石[J].地质通报,2005,24(2):176-180Wang Denghong,Li Huaqin,Chen Yuchuan,et al.Discovery of high rare earth calcite in Dachang super-large tin polymetallic deposit in Nandan region,northwest Guangxi[J].Geological Bulletin of China,2005,24(2):176-180
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