贵州罗甸玉矿区滑石矿的发现及其成因探讨
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摘要
罗甸滑石矿是贵州首次发现的白滑石矿,矿体呈似层状、透镜状产于辉绿岩体与围岩的接触带内,与罗甸玉共生。罗甸滑石为低铝、低铁质矿石,MgO含量接近滑石的理论值,结晶细、质纯、白度高,具有较高的开发利用价值,填补了贵州没有优质滑石矿的空白。罗甸滑石矿与罗甸玉矿的地质背景及其空间产出部位相同,并且具有相似的稀土元素组成及配分模式,揭示二者为相同成因,属于接触交代型矿床。
Luodian talc ore is the white talc ore first found in Guizhou,the ore bodies are bedded and lenticular occurs in the contact zone between the diabase body and the surrounding rock,belong to the paragenetic minerals of Luodian nephrite. Luodian talc ore is low alumina and low iron,that the MgO content is close to the theoretical value of talc. Luodian talc ore with its fine crystal,pure quality and high whiteness,has high exploitation value. It fills the void that there is no talc ore of high quality in Guizhou before. Luodian talc deposit and Luodian nephrite deposit have same geological background and formed position as well as similar REE composition and pattern. It shows that these two deposits possess same genesis,which is contact metasomatic deposit.
Luodian talc ore is the white talc ore first found in Guizhou,the ore bodies are bedded and lenticular occurs in the contact zone between the diabase body and the surrounding rock,belong to the paragenetic minerals of Luodian nephrite. Luodian talc ore is low alumina and low iron,that the MgO content is close to the theoretical value of talc. Luodian talc ore with its fine crystal,pure quality and high whiteness,has high exploitation value. It fills the void that there is no talc ore of high quality in Guizhou before. Luodian talc deposit and Luodian nephrite deposit have same geological background and formed position as well as similar REE composition and pattern. It shows that these two deposits possess same genesis,which is contact metasomatic deposit.
引文
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Shin D and Lee I.2002.Carbonate-hosted talc deposits in the contact aureole of an igneous intrusion(Hwanggangri mineralized zone,South Korea):geochemistry,phase relationships,and stable isotope studies[J].Ore Geology Reviews,(22):17-39.
Usuki T,Lan C Y,Tran T H,Pham T D,Wang K L,Shellnutt G J and Chung S L.2015.Zircon U-Pb ages and Hf isotopic compositions of alkaline silicic magmatic rocks in the Phan Si Pan-Tu Le region,northern Vietnam:Identification of a displaced western extension of the Emeishan Large Igneous Province[J].Journal of A-sian Earth Sciences,97:102-124.
迟广成,肖刚,伍月,陈英丽,王海娇,胡建飞.2014.X射线粉晶衍射仪在大理岩鉴定与分类中的应用[J].岩矿测试,33(5):698-705.
范羽,周涛发,张达玉,袁峰,范裕,任志.2016.皖南地区青阳-九华山复式岩体的成因[J].岩石学报,32(2),419-438.
胡瑞忠,陶琰,钟宏,黄智龙,张正伟.2005.地幔柱成矿系统:以峨眉山地幔柱为例[J].地学前缘,12(01):42-54.
黄文龙,刘希军,时毓,廖帅,郭琳.2013.百色地区巴马辉绿岩型金矿成矿源区探讨[J].矿物学报,(S2):96-97.
黄勇,郝家栩,白龙,张国祥.2012.贵州省冗里软玉矿的发现及意义[J].岩石矿物学杂志,31(4):612-620.
黄勇,陈能松,戴传固,韩颖平,白龙,邓小杰.2017.罗甸玉矿区基性岩床内中性岩的锆石U-Pb定年及意义[J].贵州地质,34(2):90-96.
黄勇,郝家栩,韩颖平,白龙,邓贵标,邓小杰,2018.罗甸玉勘查技术与资源评价研究[M].武汉:中国地质大学出版社.
江德玉.2000.我国滑石工业现状及发展前景[J].非金属矿,23(5):5-9.
李芃.2006.辽宁省桓仁地区滑石矿床地质特征[J].中国非金属矿工业导刊,(5):60-61.
李桥.2014.浅谈广西龙胜滑石矿地质特征、成因及找矿方向[J].中国高新技术企业,(6):120-121.
苏旭亮,刘俊,王帅,赵闯,张学明,王虎,于洋.2015.胶东西部滑石矿地质特征及找矿前景分析[J].中国非金属矿工业导刊,(3):28-31.
吴基球,文忠和,李竟先.2008.我国黑滑石资源及其应用状况[J].中国非金属矿工业导刊,(4):12-17.
谢宏.2012.贵州滑石矿床类型及找矿标志[J].中国非金属矿工业导刊,(3):57-59.
余志伟.2001.江西滑石矿成矿条件及成因分析[J].华东地质学院学报,24(1):19-21.
张晓晖,吴瑞华,王乐燕.2001.俄罗斯贝加尔湖地区软玉的岩石学特征研究[J].宝石和宝石学杂志,3(1):12-17.
周征宇,廖宗廷,陈盈,李玉加,马婷婷.2008.青海软玉的岩石矿物学特征[J].岩矿测试,27(1):17-20.
Deng Y F,Chen Y,Wang P,Essa K S,Xu T,Liang X F and Badal J.2016.Magmatic underplating beneath the Emeishan large igneous province(South China)revealed by the COMGRA-ELIPexperiment[J].Tectonophysics,672-673:16-23.
Li C X,Wang R C,Lu X C and Zhang M.2013.Mineralogical characteristics of unusual black talc ores in Guangfeng County,Jiangxi Province,China[J].Applied Clay Science,74:37-46.
Li H B,Zhang Z C,Santosh M,Lu L,Han L,Liu W and Cheng ZG.2016.Late Permian basalts in the northwestern margin of the Emeishan Large Igneous Province:Implications for the origin of the Songpan-Ganzi terrane[J].Lithos,256-257:75-87.
Shin D and Lee I.2002.Carbonate-hosted talc deposits in the contact aureole of an igneous intrusion(Hwanggangri mineralized zone,South Korea):geochemistry,phase relationships,and stable isotope studies[J].Ore Geology Reviews,(22):17-39.
Usuki T,Lan C Y,Tran T H,Pham T D,Wang K L,Shellnutt G J and Chung S L.2015.Zircon U-Pb ages and Hf isotopic compositions of alkaline silicic magmatic rocks in the Phan Si Pan-Tu Le region,northern Vietnam:Identification of a displaced western extension of the Emeishan Large Igneous Province[J].Journal of A-sian Earth Sciences,97:102-124.