{"title":"蒙切深成岩体和蒙切顿拉侵入接触带的矿脉形成","authors":"Y. A. Miroshnikova","doi":"10.21443/1560-9278-2022-25-1-27-37","DOIUrl":null,"url":null,"abstract":"The Monchegorsk region (Kola Peninsula) is distinguished by its platinum metal specialization and is a promising target for prospecting and exploration of valuable, strategically important platinum group metals. In the course of the study, the petrographic, petrochemical, and geochemical features of the vein bodies in the junction zone of large Early Proterozoic layered intrusions (the Monchegorsk pluton and the Monchetundra intrusion) have been characterized. Vein bodies are observed within the South Sopchinsky massif and the Moroshkovoe Lake massif. The veins are located near the contact of fine-medium-grained metapyroxenites (metanorites) and coarse-grained gabbronorites. Two main types of veins are identified: 1) veins of plagioclase-pyroxene and plagioclase-amphibole composition and 2) veins of quartz-feldspar and amphibole-plagioclase composition. Analysis of the content of chalcophilic elements in this area rocks has shown that the increased content of platinum group elements is associated with the first type of vein formations. Vein rocks of plagioclase-pyroxene and plagioclase-amphibole composition (type 1) contain on average Cu - 0.22 %, Ni - 0.11 %, ΣPGE - 1 g/t, Au - 0.042 ppm. Vein rocks of quartz-feldspar and amphibole-plagioclase composition (type 2) contain on average Cu - 0.04 %, Ni - 0.01 %, ΣPGE - 0.05 ppm, Au - 0.012 ppm. The distribution spectra of rare-earth and rare elements in the vein rocks of the South Sopchinsky massif and the Moroshkovoe Lake massif show both the commonality of all types of veins and the regular nature of differences in the composition of the veins.","PeriodicalId":30200,"journal":{"name":"Vestnik MGTU","volume":" ","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Vein formation of the Monchepluton and the Monchetundra intrusion contact zone\",\"authors\":\"Y. A. Miroshnikova\",\"doi\":\"10.21443/1560-9278-2022-25-1-27-37\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The Monchegorsk region (Kola Peninsula) is distinguished by its platinum metal specialization and is a promising target for prospecting and exploration of valuable, strategically important platinum group metals. In the course of the study, the petrographic, petrochemical, and geochemical features of the vein bodies in the junction zone of large Early Proterozoic layered intrusions (the Monchegorsk pluton and the Monchetundra intrusion) have been characterized. Vein bodies are observed within the South Sopchinsky massif and the Moroshkovoe Lake massif. The veins are located near the contact of fine-medium-grained metapyroxenites (metanorites) and coarse-grained gabbronorites. Two main types of veins are identified: 1) veins of plagioclase-pyroxene and plagioclase-amphibole composition and 2) veins of quartz-feldspar and amphibole-plagioclase composition. Analysis of the content of chalcophilic elements in this area rocks has shown that the increased content of platinum group elements is associated with the first type of vein formations. Vein rocks of plagioclase-pyroxene and plagioclase-amphibole composition (type 1) contain on average Cu - 0.22 %, Ni - 0.11 %, ΣPGE - 1 g/t, Au - 0.042 ppm. Vein rocks of quartz-feldspar and amphibole-plagioclase composition (type 2) contain on average Cu - 0.04 %, Ni - 0.01 %, ΣPGE - 0.05 ppm, Au - 0.012 ppm. The distribution spectra of rare-earth and rare elements in the vein rocks of the South Sopchinsky massif and the Moroshkovoe Lake massif show both the commonality of all types of veins and the regular nature of differences in the composition of the veins.\",\"PeriodicalId\":30200,\"journal\":{\"name\":\"Vestnik MGTU\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-03-31\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Vestnik MGTU\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.21443/1560-9278-2022-25-1-27-37\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vestnik MGTU","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.21443/1560-9278-2022-25-1-27-37","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
摘要
蒙切戈尔斯克地区(科拉半岛)以其铂金属专业化而闻名,是一个有价值的、具有重要战略意义的铂族金属的远景勘探目标。在研究过程中,对早元古代大型层状侵入体(Monchegorsk岩体和Monchetundra岩体)交汇带的岩石学、石油化学和地球化学特征进行了表征。在南索普钦斯基地块和莫罗什科沃湖地块内可见脉体。脉体位于细、中粒变质辉长岩和粗粒辉长岩接触处附近。鉴定出两种主要的矿脉类型:1)斜长石-辉石和斜长石-角闪石组成的矿脉;2)石英-长石和角闪石-斜长石组成的矿脉。对该地区岩石中亲铜元素含量的分析表明,铂族元素含量的增加与第一类脉状地层有关。斜长石-辉石和斜长石-角闪孔组成的脉状岩石(型1)平均含Cu - 0.22%, Ni - 0.11%, ΣPGE - 1 g/t, Au - 0.042 ppm。石英长石和角闪斜长石组成的脉状岩石(2型)平均含Cu - 0.04%, Ni - 0.01%, ΣPGE - 0.05 ppm, Au - 0.012 ppm。南索普金斯基地块和莫罗什科沃湖地块脉岩中稀土和稀有元素的分布谱既显示出各类脉岩的共性,又显示出脉岩组成差异的规律性。
Vein formation of the Monchepluton and the Monchetundra intrusion contact zone
The Monchegorsk region (Kola Peninsula) is distinguished by its platinum metal specialization and is a promising target for prospecting and exploration of valuable, strategically important platinum group metals. In the course of the study, the petrographic, petrochemical, and geochemical features of the vein bodies in the junction zone of large Early Proterozoic layered intrusions (the Monchegorsk pluton and the Monchetundra intrusion) have been characterized. Vein bodies are observed within the South Sopchinsky massif and the Moroshkovoe Lake massif. The veins are located near the contact of fine-medium-grained metapyroxenites (metanorites) and coarse-grained gabbronorites. Two main types of veins are identified: 1) veins of plagioclase-pyroxene and plagioclase-amphibole composition and 2) veins of quartz-feldspar and amphibole-plagioclase composition. Analysis of the content of chalcophilic elements in this area rocks has shown that the increased content of platinum group elements is associated with the first type of vein formations. Vein rocks of plagioclase-pyroxene and plagioclase-amphibole composition (type 1) contain on average Cu - 0.22 %, Ni - 0.11 %, ΣPGE - 1 g/t, Au - 0.042 ppm. Vein rocks of quartz-feldspar and amphibole-plagioclase composition (type 2) contain on average Cu - 0.04 %, Ni - 0.01 %, ΣPGE - 0.05 ppm, Au - 0.012 ppm. The distribution spectra of rare-earth and rare elements in the vein rocks of the South Sopchinsky massif and the Moroshkovoe Lake massif show both the commonality of all types of veins and the regular nature of differences in the composition of the veins.