滇东南都龙锡锌多金属矿床中符山石的发现与地质意义
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摘要
云南省马关县都龙超大型锡锌多金属矿床是我国重要锡锌资源基地之一,夕卡岩化是矿床中最主要近矿围岩蚀变,近年的地质勘探与找矿过程中,发现了前人所忽视的符山石,该类夕卡岩矿物主要分布于无水夕卡岩与含水夕卡岩过渡部位,属于含水夕卡岩阶段的产物,并与Zn-Cu矿化关系密切,可以作为相关矿化找矿标志。本文通过LA-ICP-MS对该类矿物进行了原位主、微量及稀土元素分析,结果表明,符山石中富集Zn、Sn、W和Bi等成矿元素,这些成矿元素以类质同象形式置换了符山石的晶格中的Mg2+和Fe2+,暗示在湿夕卡岩阶段成矿流体中已经大量富集了这类成矿元素,有利于后期相关矿化的形成。此外,该类矿物稀土配分模式为中等向右倾斜曲线,Y/Ho比值在22.3~34.4之间,与矿区深部燕山期隐伏花岗岩较为相似,表明其形成与该岩体关系密切。
Dulong Sn-Zn polymetallic ore deposit, Maguan area, Yunnan Province, China is one of most important producing areas of Sn and Zn resource in China, and its wall rock alteration is dominated by skarn. Vesuvianit, being ignored by researchers, has been discovered during recent geological exploring. The mineral occurs in the transition part between anhydrous skarn and hydrous skarn, belonging to the product in hydrous skarn stage, and is relate closely to Zn-Cu mineralization. It is suggested that vesuvianit is a prospecting indicator for Zn-Cu. Researched by LA-ICP-MS, it shows that vesuvianit is rich in Zn, Sn, W and Bi; those ore-forming elements replace Mg2+ and Fe2+ in the crystal lattice of vesuvianit, and present as isomorphism, implying that the ore-forming fluid is rich in metallogenic elements during hydrous skarn stage, which is beneficial to the mineralization. Furthermore, the chondrite-normalized REE patterns of vesuvianit belong to the LREE-rich type, and Y/Ho ratio value is between 22.3 and 34.4, corresponding to that of Later Yanshanian concealed granite, and suggesting that the formation of vesuvianit is related closely to the rock mass.
Dulong Sn-Zn polymetallic ore deposit, Maguan area, Yunnan Province, China is one of most important producing areas of Sn and Zn resource in China, and its wall rock alteration is dominated by skarn. Vesuvianit, being ignored by researchers, has been discovered during recent geological exploring. The mineral occurs in the transition part between anhydrous skarn and hydrous skarn, belonging to the product in hydrous skarn stage, and is relate closely to Zn-Cu mineralization. It is suggested that vesuvianit is a prospecting indicator for Zn-Cu. Researched by LA-ICP-MS, it shows that vesuvianit is rich in Zn, Sn, W and Bi; those ore-forming elements replace Mg2+ and Fe2+ in the crystal lattice of vesuvianit, and present as isomorphism, implying that the ore-forming fluid is rich in metallogenic elements during hydrous skarn stage, which is beneficial to the mineralization. Furthermore, the chondrite-normalized REE patterns of vesuvianit belong to the LREE-rich type, and Y/Ho ratio value is between 22.3 and 34.4, corresponding to that of Later Yanshanian concealed granite, and suggesting that the formation of vesuvianit is related closely to the rock mass.
引文
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[18]张世奎,缪应理,郭跃进.云南马关都龙辣子寨碳酸盐岩型铅锌矿体的发现及其地质意义[J].矿物学报,2013,33(4):456-461.
[19]鲍谈,叶霖.都龙夕卡岩型锡锌多金属矿床成矿流体研究[J].矿物学报,2013,33(s1):426-427.
[20]何芳,张乾,王大鹏,刘玉平,叶霖,鲍谈,王小娟,缪应理,张世奎,苏航,韦文彪.云南都龙Sn-Zn多金属矿床成矿物质来源—硫、碳、氧稳定同位素证据[J].矿物岩石地球化学通报,2014,33(6):900-907.
[21]何芳.云南都龙锡锌多金属矿床成矿物质来源研究[D].贵阳:中国科学院地球化学研究所,2014.
[22]鲍谈.云南都龙夕卡岩型锡锌多金属矿床成矿流体及成矿机制研究[D].贵阳:中国科学院地球化学研究所,2014.
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[24]王小娟,刘玉平,缪应理,鲍谈,叶霖,张乾.都龙锡锌多金属矿床LA-MC-ICPMS锡石U-Pb测年及其意义[J].岩石学报,2014,30(3):867-876.
[25]王金良,刘玉平,王小娟,缪应理,苏航.都龙锡锌多金属矿床夕卡岩地质地球化学特征及成因讨论[J].民营科技,2014,8:93-97.
[26]张世涛,冯明刚,吕伟.滇东南温河变质核杂岩解析[J].中国区域地质,1998,17(4):390-397.
[27]张斌辉,丁俊,任光明,张林奎,石洪召.云南马关老君山花岗岩的年代学、地球化学特征及地质意义[J].地质学报,2012,86(4):587-601.
[28]云南省地质矿产局.云南省区域地质志[M].北京:地质出版社,1990.
[29]王濮,潘兆橹,翁玲宝.系统矿物学(中册)[M].北京:地质出版社,1984:246-250.
[30]潘兆橹.结晶学与矿物学[M].北京:地质出版社,2001:438-440.
[31]Sun S S,Mcdonough W F.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J].:Geological Society,1989,42(1):313-345.
[32]余晓艳,柯捷,雷引玲.符山石玉的宝石学特征研究[J].宝石和宝石学杂志,2005,7(2):14-17.
[33]彭晶晶,王铎.符山石玉的初步研究[J].宝石和宝石学杂志,2010,12(2):29-31.
[2]刘玉平.一个受后期改造和热液叠加的块状硫化物矿床-都龙超大型锡锌多金属矿床[J].矿物岩石地球化学通报,1998,17(1):22-24.
[3]刘玉平,李朝阳,刘家军.都龙矿床含矿层状夕卡岩成因的地质地球化学证据[J].矿物学报,2000,20(4):378-384.
[4]刘玉平,李正祥,李惠民,郭利果,徐伟,叶霖,李朝阳,皮道会.都龙锡锌矿床锡石和锆石U-Pb年代学:滇东南白垩纪大规模花岗岩成岩成矿事件[J].岩石学报,2007,23(5):967-976.
[5]曾志刚,李朝阳,刘玉平.老君山锡锌多金属成矿区变质成因夕卡岩的地质地球化学特征[J].矿物学报,1999,19(1):48-55.
[6]李文尧.云南麻栗坡新寨锡矿物化探异常特征[J].云南地质,2002,21(1):72-82.
[7]秦德先,刘春学.矿产资源经济学[M].北京:科学出版社,2002,1-216.
[8]颜丹平,周美夫,王焰.都龙-Song Chay变质弯隆体变形与构造年代-南海盆地北缘早期扩张作用始于华南地块张裂的证据[J].中国地质大学学报,2005,30(4):402-412.
[9]张春红,黎应书,王金良,林知法.云南马关都龙锡锌多金属矿床成矿控制条件[J].有色金属,2008,60(4):140-143.
[10]廖震,刘玉平,李朝阳,叶霖,刘世荣,郑文勤.都龙锡锌矿床绿泥石特征及其成矿意义[J].矿床地质,2010,29(1):169-176.
[11]冯佳睿,毛景文,裴荣富,周振华,杨宗喜.云南瓦渣钨矿区老君山花岗岩体的SHRIMP锆石U-Pb定年、地球化学特征及成因探讨[J].岩石学报,2010,26(3):845-857.
[12]冯佳睿,毛景文,裴荣富,李超.滇东南老君山地区印支期成矿事件初探-以新寨锡矿床和南秧田钨矿床为例[J].矿床地质,2011,30(1):57-73.
[13]范承钧.云南锡矿带之划分及其区域成矿地质特点[J].云南地质,1988,7(1):1-12.
[14]宋焕斌.云南东南部都龙锡石-硫化物型矿床的成矿特征[J].矿床地质,1989,8(4):29-38.
[15]周建平,徐克勤,华仁民.滇东南锡多金属矿床成因商榷[J].云南地质,1997,16(4):309-349.
[16]周建平,徐克勤,华仁民.滇东南喷流沉积硫化物块状硫化物特征与矿床成因[J].矿物学报,1998,18(2):158-168.
[17]缪应理,张世奎,韦文彪,杨荣华.云南都龙锡多金属矿床金石坡矿段钨铜钼矿化特征及地质意义[J].矿物学报,2013,33(4):510-514.
[18]张世奎,缪应理,郭跃进.云南马关都龙辣子寨碳酸盐岩型铅锌矿体的发现及其地质意义[J].矿物学报,2013,33(4):456-461.
[19]鲍谈,叶霖.都龙夕卡岩型锡锌多金属矿床成矿流体研究[J].矿物学报,2013,33(s1):426-427.
[20]何芳,张乾,王大鹏,刘玉平,叶霖,鲍谈,王小娟,缪应理,张世奎,苏航,韦文彪.云南都龙Sn-Zn多金属矿床成矿物质来源—硫、碳、氧稳定同位素证据[J].矿物岩石地球化学通报,2014,33(6):900-907.
[21]何芳.云南都龙锡锌多金属矿床成矿物质来源研究[D].贵阳:中国科学院地球化学研究所,2014.
[22]鲍谈.云南都龙夕卡岩型锡锌多金属矿床成矿流体及成矿机制研究[D].贵阳:中国科学院地球化学研究所,2014.
[23]王小娟.云南都龙锡锌多金属矿床找矿矿物学与成矿年代学[D].贵阳:中国科学院地球化学研究所,2014.
[24]王小娟,刘玉平,缪应理,鲍谈,叶霖,张乾.都龙锡锌多金属矿床LA-MC-ICPMS锡石U-Pb测年及其意义[J].岩石学报,2014,30(3):867-876.
[25]王金良,刘玉平,王小娟,缪应理,苏航.都龙锡锌多金属矿床夕卡岩地质地球化学特征及成因讨论[J].民营科技,2014,8:93-97.
[26]张世涛,冯明刚,吕伟.滇东南温河变质核杂岩解析[J].中国区域地质,1998,17(4):390-397.
[27]张斌辉,丁俊,任光明,张林奎,石洪召.云南马关老君山花岗岩的年代学、地球化学特征及地质意义[J].地质学报,2012,86(4):587-601.
[28]云南省地质矿产局.云南省区域地质志[M].北京:地质出版社,1990.
[29]王濮,潘兆橹,翁玲宝.系统矿物学(中册)[M].北京:地质出版社,1984:246-250.
[30]潘兆橹.结晶学与矿物学[M].北京:地质出版社,2001:438-440.
[31]Sun S S,Mcdonough W F.Chemical and isotopic systematics of oceanic basalts:Implications for mantle composition and processes[J].:Geological Society,1989,42(1):313-345.
[32]余晓艳,柯捷,雷引玲.符山石玉的宝石学特征研究[J].宝石和宝石学杂志,2005,7(2):14-17.
[33]彭晶晶,王铎.符山石玉的初步研究[J].宝石和宝石学杂志,2010,12(2):29-31.