内蒙古维拉斯托锡多金属矿床含矿斑岩体钾长石斑晶的有序度及成因探讨
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摘要
钾长石有序度及结构温度可以为探讨成矿物化条件等提供依据.为阐明本区钾长石的成因,通过对维拉斯托斑岩体中钾长石斑晶的红外光谱分析,其有序度为0.85~0.95,三斜度为0.7~0.9,测定的结构温度为547.17~578.36°C,表明钾长石斑晶为微斜长石.并探讨了钾长石的成因,认为它是热液蚀变的产物.
The study of order degree and structural temperature of K-feldspar can provide significant information about the forming physicochemical conditions of deposit. Infrared spectroscopy is used to test the K-feldspar phenocrysts from the mineralized porphyry in the Weilasituo polymetallic deposit. The result shows that the order degrees range from 0.85 to 0.95,with triclinities of 0.7-0.9. The structural temperatures are 547.17-578.36 ℃,suggesting that the K-feldspar phenocrysts are microcline. It is confirmed that the K-feldspar is a product of hydrothermal alteration.
The study of order degree and structural temperature of K-feldspar can provide significant information about the forming physicochemical conditions of deposit. Infrared spectroscopy is used to test the K-feldspar phenocrysts from the mineralized porphyry in the Weilasituo polymetallic deposit. The result shows that the order degrees range from 0.85 to 0.95,with triclinities of 0.7-0.9. The structural temperatures are 547.17-578.36 ℃,suggesting that the K-feldspar phenocrysts are microcline. It is confirmed that the K-feldspar is a product of hydrothermal alteration.
引文
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[17]洪大卫.钾长石的有序-无序及其地质意义[J].国外地质参考资料,1978,16:90-109.
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[20]Baskin Y.Observation on heat-treated authigenic microcline and albite crystals[J].Geology,1956,64:219-224.
[21]Barrer R M,Hinds L.Hydrothermal synthesis of potash feldspar in the range 195-200°C[J].Nature,1950,166-167.
[22]Marmo V.Granite petrology and the granite problem[M].Elserier Pub Co,1971:161-222.
[23]洪大卫.钾长石的有序-无序及其地质意义[J].矿物学岩石学论丛,1980(1):193-210.
[24]陈文明,盛继福,钱汉东.西藏玉龙斑岩铜矿含矿斑岩体钾长石斑晶的有序度及成因探讨[J].岩石学报,2006,22(4):1017-1022.
[25]李山坡,许虹,高迪,等.黑龙江金厂金矿钾长石的结构状态与温度及其成矿意义[J].矿物岩石地球化学通报,2012,31(1):31-37.
[26]正路彻也.根据X射线粉末法确定碱性长石的成分和构造(Al/Si)有序-无序[J].矿物学杂志,1972,10(5):413-425.
[27]叶大年,金成伟.X射线粉末法及其在岩石学中的应用[M].北京:科学出版社,1984:1-370.
[28]Luth W C,Jahns R H,Turrle O F.The granite system at pressure of4 to 10 kilobars[J].Jour Geophy Res,1964,69(4):759-773.
[29]Piwinskii A J.Studies on batholithic feldspars:Sierra Nevada,California[J].Contrib Miner Petrol,1968,17(3):204-223.
[2]易健,魏俊浩,姚春亮,等.内蒙古白音诺尔铅锌矿区三叠纪侵入岩体的发现及地质意义:锆石U-Pb年代学证据[J].地质科技情报,2012,31(4):10-16.
[3]欧阳荷根.大兴安岭南段拜仁达坝-维拉斯托银多金属矿床成矿作用及动力学背景[D].北京:中国地质大学,2013.
[4]刘翼飞,樊志勇,蒋胡灿,等.内蒙古维拉斯托-拜仁达坝斑岩-热液脉状成矿体系研究[J].地质学报,2014,88(12):2374-2384.
[5]张志辉,祝新友,李泊洋,等.内蒙古自治区克什克腾旗维拉斯托新发现大型锡矿及其意义探讨[J].中国矿业,2015,24(增刊1):247-250.
[6]樊志勇,马立军,杨帆,等.内蒙古维拉斯托银铅锌多金属矿外围发现大型锡多金属矿床[J].地质与资源,2015,24(5):399-401.
[7]郭利军,谢玉玲,侯增谦,等.内蒙古拜仁达坝银多金属矿矿床地质及成矿流体特征[J].岩石矿物学杂志,2009,28(1):26-36.
[8]郑翻身,蔡红军,张振法.内蒙古拜仁达坝维拉斯托超大型银铅锌矿的发现及找矿意义[J].物探与化探,2006,30(1):13-20.
[9]刘建明,张锐,张庆洲.大兴安岭地区的区域成矿特征[J].地学前缘,2004,11:269-277.
[10]江思宏,聂凤军,刘翼飞,等.内蒙古拜仁达坝及维拉斯托银多金属矿床的硫和铅同位素研究[J].矿床地质,2010,29(1):101-112.
[11]Jahn B M,Wu F Y,Chen B.Granitoids of the Central Asian Orogenic Belt and continental growth in the Phanerozoic[J].Transaction of the Royal Society of Edinburgh:Earth Sciences,2000,91:181-193.
[12]Meng Q R.What drove Late Mesozoic extension of the Northern China-Mongolia tract?[J].Tectonophysics,2003,369:155-174.
[13]Xiao W J,Windley B F,Hao J,et al.Accretion leading to collision and the Permian Solonker suture,Inner Monglia,China:Termination of the Central Asian Orogenic Belt[J].Tectonic,2003,22:1484-1505.
[14]毛景文,谢桂青,张作衡,等.中国北方中生代大规模成矿作用的其次及其地球动力学背景[J].岩石学报,2005,21(1):169-188.
[15]王新宇,侯青叶,王瑾,等.内蒙古维拉斯托矿床花岗岩SHRIMP年代学及Hf同位素研究[J].现代地质,2013,27(1):67-78.
[16]马鸿文.钾长石X射线与红外有序度的对比及与Al占位和平衡温度的关系[J].矿物学报,1988,8(2):143-150.
[17]洪大卫.钾长石的有序-无序及其地质意义[J].国外地质参考资料,1978,16:90-109.
[18]Goldsmith J R,Laves F.The microcline stability relations[J].Geochim Cosmochim Acta,1954,5:1-19.
[19]Ribbed P H.Feldspar mineralogy reciews in mineralogy[J].Washington D C:Mineralogical Society of America,1983,2(2):18-77.
[20]Baskin Y.Observation on heat-treated authigenic microcline and albite crystals[J].Geology,1956,64:219-224.
[21]Barrer R M,Hinds L.Hydrothermal synthesis of potash feldspar in the range 195-200°C[J].Nature,1950,166-167.
[22]Marmo V.Granite petrology and the granite problem[M].Elserier Pub Co,1971:161-222.
[23]洪大卫.钾长石的有序-无序及其地质意义[J].矿物学岩石学论丛,1980(1):193-210.
[24]陈文明,盛继福,钱汉东.西藏玉龙斑岩铜矿含矿斑岩体钾长石斑晶的有序度及成因探讨[J].岩石学报,2006,22(4):1017-1022.
[25]李山坡,许虹,高迪,等.黑龙江金厂金矿钾长石的结构状态与温度及其成矿意义[J].矿物岩石地球化学通报,2012,31(1):31-37.
[26]正路彻也.根据X射线粉末法确定碱性长石的成分和构造(Al/Si)有序-无序[J].矿物学杂志,1972,10(5):413-425.
[27]叶大年,金成伟.X射线粉末法及其在岩石学中的应用[M].北京:科学出版社,1984:1-370.
[28]Luth W C,Jahns R H,Turrle O F.The granite system at pressure of4 to 10 kilobars[J].Jour Geophy Res,1964,69(4):759-773.
[29]Piwinskii A J.Studies on batholithic feldspars:Sierra Nevada,California[J].Contrib Miner Petrol,1968,17(3):204-223.