PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS

This article reviews information from published papers and studies by the authors about placer diamond deposits. Original data were obtained in result of field and laboratory-analytical work carried out in various countries of Africa and South America. The main types of placer diamond deposits – flu...

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Main Authors: Підвисоцький, В.Т., Остафійчук, Н.М., Башинський, С.І.
Format: Article in Journal/Newspaper
Language:Ukrainian
Published: Institute of Geological Sciences, NAS of Ukraine 2023
Subjects:
Online Access:http://geojournal.igs-nas.org.ua/article/view/273683
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spelling fturanojs:oai:ojs.journals.uran.ua:article/273683 2023-05-15T18:45:09+02:00 PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS РОЗСИПНІ РОДОВИЩА АЛМАЗІВ ТА УМОВИ ЇХ ФОРМУВАННЯ Підвисоцький, В.Т. Остафійчук, Н.М. Башинський, С.І. 2023-03-29 application/pdf http://geojournal.igs-nas.org.ua/article/view/273683 ukr ukr Institute of Geological Sciences, NAS of Ukraine http://geojournal.igs-nas.org.ua/article/view/273683/271117 http://geojournal.igs-nas.org.ua/article/view/273683 Авторське право (c) 2023 Віктор Підвисоцький, Неля Остафійчук, Сергій Іванович Башинський https://creativecommons.org/licenses/by-nc/4.0 Geologìčnij žurnal (Geological Journal); No. 1 (2023); 17-38 Геологический журнал; № 1 (2023); 17-38 Геологічний журнал; № 1 (2023); 17-38 2522-4107 1025-6814 розсипи алмазів типи родовищ умови формування Африка Бразилія diamond placers deposit type formation conditions Africa Brazil info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 fturanojs 2023-04-10T17:50:39Z This article reviews information from published papers and studies by the authors about placer diamond deposits. Original data were obtained in result of field and laboratory-analytical work carried out in various countries of Africa and South America. The main types of placer diamond deposits – fluvial, fluvioglacial, eolian, and man-made – have been considered and characterized. The main attention is given to fluvial continental placers, which are the most diverse, well-studied and have the greatest industrial importance. Primary, secondary and mixed deposits are distinguished according to the method of feeding; short, moderate and long transport deposits – according to the distance of the diamond-bearing material movement. It is noted that although the short transport placers (deluvial-proluvial and beds of short watercourses) have not industrial value, they are very informative for the searching for root sources. It is important to reliably diagnose these deposits by lithological-facies and mineralogical features during prospecting works. The concepts about the conditions for the formation of diamond placers in various landscape and geological conditions are developed and clarified. Alluvial-proluvial-lacustrine and proluvial-lacustrine types of placers studied in Yakutia and Brazil are characterized in detail. Their characteristic feature is that their productive strata, being re-deposited products of crustal weathering, themselves underwent a hypergenic change at the place of occurrence, which significantly masks the primary conditions of formation. Continental alluvial redeposition and long transport placers, as well as marine, yield the most high-quality expensive diamonds, the average value of which can reach $300–400 per carat. Often, such placers are formed due to the erosion of ancient Proterozoic placers, which belong to the category of fossils. The article summarizes the genetic and morphological types of diamond placers in the form of a principle diagram of the distribution of sedimentary ... Article in Journal/Newspaper Yakutia Scientific Periodicals of Ukraine (Ukrainian Research and Academic Network)
institution Open Polar
collection Scientific Periodicals of Ukraine (Ukrainian Research and Academic Network)
op_collection_id fturanojs
language Ukrainian
topic розсипи алмазів
типи родовищ
умови формування
Африка
Бразилія
diamond placers
deposit type
formation conditions
Africa
Brazil
spellingShingle розсипи алмазів
типи родовищ
умови формування
Африка
Бразилія
diamond placers
deposit type
formation conditions
Africa
Brazil
Підвисоцький, В.Т.
Остафійчук, Н.М.
Башинський, С.І.
PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS
topic_facet розсипи алмазів
типи родовищ
умови формування
Африка
Бразилія
diamond placers
deposit type
formation conditions
Africa
Brazil
description This article reviews information from published papers and studies by the authors about placer diamond deposits. Original data were obtained in result of field and laboratory-analytical work carried out in various countries of Africa and South America. The main types of placer diamond deposits – fluvial, fluvioglacial, eolian, and man-made – have been considered and characterized. The main attention is given to fluvial continental placers, which are the most diverse, well-studied and have the greatest industrial importance. Primary, secondary and mixed deposits are distinguished according to the method of feeding; short, moderate and long transport deposits – according to the distance of the diamond-bearing material movement. It is noted that although the short transport placers (deluvial-proluvial and beds of short watercourses) have not industrial value, they are very informative for the searching for root sources. It is important to reliably diagnose these deposits by lithological-facies and mineralogical features during prospecting works. The concepts about the conditions for the formation of diamond placers in various landscape and geological conditions are developed and clarified. Alluvial-proluvial-lacustrine and proluvial-lacustrine types of placers studied in Yakutia and Brazil are characterized in detail. Their characteristic feature is that their productive strata, being re-deposited products of crustal weathering, themselves underwent a hypergenic change at the place of occurrence, which significantly masks the primary conditions of formation. Continental alluvial redeposition and long transport placers, as well as marine, yield the most high-quality expensive diamonds, the average value of which can reach $300–400 per carat. Often, such placers are formed due to the erosion of ancient Proterozoic placers, which belong to the category of fossils. The article summarizes the genetic and morphological types of diamond placers in the form of a principle diagram of the distribution of sedimentary ...
format Article in Journal/Newspaper
author Підвисоцький, В.Т.
Остафійчук, Н.М.
Башинський, С.І.
author_facet Підвисоцький, В.Т.
Остафійчук, Н.М.
Башинський, С.І.
author_sort Підвисоцький, В.Т.
title PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS
title_short PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS
title_full PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS
title_fullStr PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS
title_full_unstemmed PLACER DEPOSITS OF DIAMONDS AND THEIR FORMATION CONDITIONS
title_sort placer deposits of diamonds and their formation conditions
publisher Institute of Geological Sciences, NAS of Ukraine
publishDate 2023
url http://geojournal.igs-nas.org.ua/article/view/273683
genre Yakutia
genre_facet Yakutia
op_source Geologìčnij žurnal (Geological Journal); No. 1 (2023); 17-38
Геологический журнал; № 1 (2023); 17-38
Геологічний журнал; № 1 (2023); 17-38
2522-4107
1025-6814
op_relation http://geojournal.igs-nas.org.ua/article/view/273683/271117
http://geojournal.igs-nas.org.ua/article/view/273683
op_rights Авторське право (c) 2023 Віктор Підвисоцький, Неля Остафійчук, Сергій Іванович Башинський
https://creativecommons.org/licenses/by-nc/4.0
_version_ 1766236117621800960