{"title":"Features of Chromite-Containing Placers in the Lukoyanov Placer District (Nizhny Novgorod Region) and Their Formation Conditions","authors":"A. V. Lalomov, A. V. Grigorieva, Y. N. Ivanova","doi":"10.1134/S002449022470072X","DOIUrl":null,"url":null,"abstract":"<p>Chromites are a common component of the heavy fraction of sedimentary cover deposits in the platform areas, and their contents usually do not exceed some percents. Commonly, economic chromite placers are formed in vicinity of bedrock sources. Within the Lukoyanov placer district (Nizhny Novgorod region), high chromite contents (up to 100 kg/m<sup>3</sup>) were found in Middle Jurassic complex coastal-marine rare metal–titanium placers of economic importance. Placer bodies are localized on the periphery of domes in the sedimentary cover. The placers can be sourced from Upper Permian and Lower Jurassic rocks, which were eroded in the zone of positive tectonic structures of the cover and platform basement and within the adjacent land. The revealed patterns can serve as a basis for forecasting similar deposits within promising areas.</p>","PeriodicalId":18150,"journal":{"name":"Lithology and Mineral Resources","volume":"59 6","pages":"672 - 682"},"PeriodicalIF":0.7000,"publicationDate":"2024-11-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Lithology and Mineral Resources","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S002449022470072X","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
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Abstract
Chromites are a common component of the heavy fraction of sedimentary cover deposits in the platform areas, and their contents usually do not exceed some percents. Commonly, economic chromite placers are formed in vicinity of bedrock sources. Within the Lukoyanov placer district (Nizhny Novgorod region), high chromite contents (up to 100 kg/m3) were found in Middle Jurassic complex coastal-marine rare metal–titanium placers of economic importance. Placer bodies are localized on the periphery of domes in the sedimentary cover. The placers can be sourced from Upper Permian and Lower Jurassic rocks, which were eroded in the zone of positive tectonic structures of the cover and platform basement and within the adjacent land. The revealed patterns can serve as a basis for forecasting similar deposits within promising areas.
期刊介绍：
Lithology and Mineral Resources is an international peer reviewed journal that publishes articles on a wide range of problems related to the formation of sedimentary rocks and ores. Special attention is given to comparison of ancient sedimentary rock and ore formation with present-day processes. The major part of the journal is devoted to comparative analysis of sedimentary processes on the continents and in oceans, as well as the genetic aspects of the formation of sedimentary and hydrothermal–sedimentary mineral resources. The journal welcomes manuscripts from all countries in the English or Russian language.
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