Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina)
Collected samples of bentonite and associated facies from the Justina deposit of Cretaceous age (Anacleto Formation) have been studied. Facies analysis, mineralogical, and geochemical studies have been carried out using several techniques, including: XRD, FTIR, DTA-TGA, microscopy (OM, SEM-EDX), and...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2022-04-01
|
| Series: | Minerals |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2075-163X/12/4/467 |
| _version_ | 1797444625662738432 |
|---|---|
| author | Telma Belén Musso Gisela Pettinari Manuel Pozo Alexis Gabriel Martínez Rafael González |
| author_facet | Telma Belén Musso Gisela Pettinari Manuel Pozo Alexis Gabriel Martínez Rafael González |
| author_sort | Telma Belén Musso |
| collection | DOAJ |
| description | Collected samples of bentonite and associated facies from the Justina deposit of Cretaceous age (Anacleto Formation) have been studied. Facies analysis, mineralogical, and geochemical studies have been carried out using several techniques, including: XRD, FTIR, DTA-TGA, microscopy (OM, SEM-EDX), and chemical analysis. The deposit occurs in a shallow, saline lacustrine environment developed over a fluvial floodplain, with a thickness between 0.21 and 0.8 m intercalated between fine-grained siliciclastic facies. Three mineral assemblages were found. In assemblage 1, the bentonite has low content of detrital minerals and the smectite is sodic. In assemblage 2, the bentonite shows the occurrence of minor analcime and mica, slightly higher detrital mineral content and the smectite is sodic to sodic-calcic. The associated detrital facies (assemblage 3) is dominated by illite and a mixed layer of illite and calcic smectite (R0), subordinately kaolinite + chlorite, and locally low-ordered smectite. As inherited minerals are found: quartz, potassium feldspar, plagioclase, illite-mica, heavy minerals (monazite, zircon, apatite, titanomagnetite) and volcanic rock fragments (andesite, glass). Authigenic minerals are: sodium smectite, analcime, barite, celestine, gypsum, and hematite. A model for the formation of authigenic minerals is proposed, highlighting the formation of sodic smectite from the alteration of volcanic glass of trachyandesitic composition. |
| first_indexed | 2024-03-09T13:15:16Z |
| format | Article |
| id | doaj.art-2f4ed7fcd505485ebea3e43ad51bd593 |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T13:15:16Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-2f4ed7fcd505485ebea3e43ad51bd5932023-11-30T21:36:39ZengMDPI AGMinerals2075-163X2022-04-0112446710.3390/min12040467Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina)Telma Belén Musso0Gisela Pettinari1Manuel Pozo2Alexis Gabriel Martínez3Rafael González4Instituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas, PROBIEN (CONICET-UNCo), Universidad Nacional del Comahue, Buenos Aires 1400, Neuquén, ArgentinaInstituto de Investigación y Desarrollo en Ingeniería de Procesos, Biotecnología y Energías Alternativas, PROBIEN (CONICET-UNCo), Universidad Nacional del Comahue, Buenos Aires 1400, Neuquén, ArgentinaDepartment of Geology and Geochemistry, Faculty of Sciences, Autonomous University of Madrid, Campus de Cantoblanco, 28049 Madrid, SpainTolsa Minerales La Patagonia S.A. Parque Industrial, Cinco Saltos 8303, Río Negro, ArgentinaTolsa S.A., Carretera de Madrid a Rivas Jarama 35, 28031 Madrid, SpainCollected samples of bentonite and associated facies from the Justina deposit of Cretaceous age (Anacleto Formation) have been studied. Facies analysis, mineralogical, and geochemical studies have been carried out using several techniques, including: XRD, FTIR, DTA-TGA, microscopy (OM, SEM-EDX), and chemical analysis. The deposit occurs in a shallow, saline lacustrine environment developed over a fluvial floodplain, with a thickness between 0.21 and 0.8 m intercalated between fine-grained siliciclastic facies. Three mineral assemblages were found. In assemblage 1, the bentonite has low content of detrital minerals and the smectite is sodic. In assemblage 2, the bentonite shows the occurrence of minor analcime and mica, slightly higher detrital mineral content and the smectite is sodic to sodic-calcic. The associated detrital facies (assemblage 3) is dominated by illite and a mixed layer of illite and calcic smectite (R0), subordinately kaolinite + chlorite, and locally low-ordered smectite. As inherited minerals are found: quartz, potassium feldspar, plagioclase, illite-mica, heavy minerals (monazite, zircon, apatite, titanomagnetite) and volcanic rock fragments (andesite, glass). Authigenic minerals are: sodium smectite, analcime, barite, celestine, gypsum, and hematite. A model for the formation of authigenic minerals is proposed, highlighting the formation of sodic smectite from the alteration of volcanic glass of trachyandesitic composition.https://www.mdpi.com/2075-163X/12/4/467bentoniteNa-smectiteanalcimeCretaceouslacustrine-palustrine environmentbarite |
| spellingShingle | Telma Belén Musso Gisela Pettinari Manuel Pozo Alexis Gabriel Martínez Rafael González Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina) Minerals bentonite Na-smectite analcime Cretaceous lacustrine-palustrine environment barite |
| title | Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina) |
| title_full | Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina) |
| title_fullStr | Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina) |
| title_full_unstemmed | Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina) |
| title_short | Distribution, Sedimentology and Origin of Mineralogical Assemblages from a Continental Na-bentonite Deposit in the Cretaceous Neuquén Basin (Argentina) |
| title_sort | distribution sedimentology and origin of mineralogical assemblages from a continental na bentonite deposit in the cretaceous neuquen basin argentina |
| topic | bentonite Na-smectite analcime Cretaceous lacustrine-palustrine environment barite |
| url | https://www.mdpi.com/2075-163X/12/4/467 |
| work_keys_str_mv | AT telmabelenmusso distributionsedimentologyandoriginofmineralogicalassemblagesfromacontinentalnabentonitedepositinthecretaceousneuquenbasinargentina AT giselapettinari distributionsedimentologyandoriginofmineralogicalassemblagesfromacontinentalnabentonitedepositinthecretaceousneuquenbasinargentina AT manuelpozo distributionsedimentologyandoriginofmineralogicalassemblagesfromacontinentalnabentonitedepositinthecretaceousneuquenbasinargentina AT alexisgabrielmartinez distributionsedimentologyandoriginofmineralogicalassemblagesfromacontinentalnabentonitedepositinthecretaceousneuquenbasinargentina AT rafaelgonzalez distributionsedimentologyandoriginofmineralogicalassemblagesfromacontinentalnabentonitedepositinthecretaceousneuquenbasinargentina |