{"title":"Moganite in agates from shungite rocks of the Paleoproterozoic Onega basin (Karelia)","authors":"Е. Н. Светова, O. B. Lavrov","doi":"10.31857/s0869605524030045","DOIUrl":"https://doi.org/10.31857/s0869605524030045","url":null,"abstract":"The monocline phase of silica – moganite for the first time has been found in carbon-rich sedimentary rocks (shungites) of Zaonega formation within the Paleoproterozoic Onega basin. Moganite forms intergrowths with fibrous chalcedony in concentric layers of agates, which are presumably associated with pseudomorphic replacement of carbonate nodules. According to local Raman spectroscopy analyses, content of moganite within individual chalcedony bands is not homogenous and varies in the range of 22–50%. The estimated values of moganite content are very high for agates formed in the Paleoproterozoic rocks aged 2050 Ma and indicate a large temporary gap between formation of the sedimentary sequence and the hydrothermal process that initiated agate mineralization.","PeriodicalId":36969,"journal":{"name":"Zapiski Rossiiskogo Mineralogicheskogo Obshchestva","volume":"CLIII 3","pages":"64-75"},"PeriodicalIF":0.0,"publicationDate":"2024-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://journals.rcsi.science/0869-6055/article/download/272712/251699","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147895639","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Владимир Леонидович Левин, В. Г. Степанец, Е. С. Ли, Галия Кобешовна Бекенова, Марат Сабиржанович Хакимжанов
{"title":"Находка сульфидов рения в медноколчеданных рудах проявления Майке (Улытау, Центральный Казахстан)","authors":"Владимир Леонидович Левин, В. Г. Степанец, Е. С. Ли, Галия Кобешовна Бекенова, Марат Сабиржанович Хакимжанов","doi":"10.31857/s0869605520050044","DOIUrl":"https://doi.org/10.31857/s0869605520050044","url":null,"abstract":"","PeriodicalId":36969,"journal":{"name":"Zapiski Rossiiskogo Mineralogicheskogo Obshchestva","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42009204","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Памятные события и даты жизни академика Н.П. Юшкина (к 85-летию со дня рождения)","authors":"А. М. Асхабов, Ю. Б. Марин","doi":"10.31857/s0869605521030023","DOIUrl":"https://doi.org/10.31857/s0869605521030023","url":null,"abstract":"","PeriodicalId":36969,"journal":{"name":"Zapiski Rossiiskogo Mineralogicheskogo Obshchestva","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"69746396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}