Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations
The geology of the embalse Las Maderas area, Jujuy Province in the Cordillera Oriental (Eastern Andean Cordillera) of Argentina is described. The exposed succession corresponds to the metamorphic basement of northwestern Argentina (Puncoviscana Complex) and the marine sedimentary rocks of the lower...
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2018
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p95_Duperron http://hdl.handle.net/20.500.12110/paper_00044822_v75_n1_p95_Duperron |
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paper:paper_00044822_v75_n1_p95_Duperron2025-07-30T17:10:36Z Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations Linguliform brachiopods Lower Ordovician Marine sediments Northwestern Argentina Phosphate bioclastic rock brachiopod concentration (composition) fossil assemblage intermontane basin marine sediment phosphogenesis sedimentary rock sedimentary structure structural geology Tremadocian trilobite Argentina Cordillera Oriental [Argentina] Jujuy Brachiopoda Trilobitomorpha victoria group The geology of the embalse Las Maderas area, Jujuy Province in the Cordillera Oriental (Eastern Andean Cordillera) of Argentina is described. The exposed succession corresponds to the metamorphic basement of northwestern Argentina (Puncoviscana Complex) and the marine sedimentary rocks of the lower Paleozoic (Mesón and Santa Victoria Groups), cropping out in the hills around the reservoir. Cenozoic synorogenic conglomerates of the Piquete Formation (Jujuy Group) and The La Troja Formation are located in the intermontane lowlands. The structure is characterized by overturned folds associated with thrusts developed on the low-grade metasedimentary rocks of the basement, consistent with a thick-skin structural style, with East vergent fault flexured folds cut by parallel oriented faults. Phosphatic rocks of the Santa Victoria Group were studied in detail. Their origin is associated to the sedimentary reworking of biogenic particles and it is not constrained to a phosphogenic interval sensu stricto. Beds with high phosphate content and high concentration of linguliform bioclasts of the Floresta Formation were classified as phosbio-grainstones and phosbio-rudstones. Other beds with lower phosphate content in the Áspero and San Bernardo Formations incorporated a significant proportion of rhynchonelliform brachiopods and trilobites together with the linguliform brachiopods, and were classified as biophosbio-rudstones. © 2018, Taylor and Francis Ltd. All rights reserved. 2018 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p95_Duperron http://hdl.handle.net/20.500.12110/paper_00044822_v75_n1_p95_Duperron |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Linguliform brachiopods Lower Ordovician Marine sediments Northwestern Argentina Phosphate bioclastic rock brachiopod concentration (composition) fossil assemblage intermontane basin marine sediment phosphogenesis sedimentary rock sedimentary structure structural geology Tremadocian trilobite Argentina Cordillera Oriental [Argentina] Jujuy Brachiopoda Trilobitomorpha victoria group |
| spellingShingle |
Linguliform brachiopods Lower Ordovician Marine sediments Northwestern Argentina Phosphate bioclastic rock brachiopod concentration (composition) fossil assemblage intermontane basin marine sediment phosphogenesis sedimentary rock sedimentary structure structural geology Tremadocian trilobite Argentina Cordillera Oriental [Argentina] Jujuy Brachiopoda Trilobitomorpha victoria group Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations |
| topic_facet |
Linguliform brachiopods Lower Ordovician Marine sediments Northwestern Argentina Phosphate bioclastic rock brachiopod concentration (composition) fossil assemblage intermontane basin marine sediment phosphogenesis sedimentary rock sedimentary structure structural geology Tremadocian trilobite Argentina Cordillera Oriental [Argentina] Jujuy Brachiopoda Trilobitomorpha victoria group |
| description |
The geology of the embalse Las Maderas area, Jujuy Province in the Cordillera Oriental (Eastern Andean Cordillera) of Argentina is described. The exposed succession corresponds to the metamorphic basement of northwestern Argentina (Puncoviscana Complex) and the marine sedimentary rocks of the lower Paleozoic (Mesón and Santa Victoria Groups), cropping out in the hills around the reservoir. Cenozoic synorogenic conglomerates of the Piquete Formation (Jujuy Group) and The La Troja Formation are located in the intermontane lowlands. The structure is characterized by overturned folds associated with thrusts developed on the low-grade metasedimentary rocks of the basement, consistent with a thick-skin structural style, with East vergent fault flexured folds cut by parallel oriented faults. Phosphatic rocks of the Santa Victoria Group were studied in detail. Their origin is associated to the sedimentary reworking of biogenic particles and it is not constrained to a phosphogenic interval sensu stricto. Beds with high phosphate content and high concentration of linguliform bioclasts of the Floresta Formation were classified as phosbio-grainstones and phosbio-rudstones. Other beds with lower phosphate content in the Áspero and San Bernardo Formations incorporated a significant proportion of rhynchonelliform brachiopods and trilobites together with the linguliform brachiopods, and were classified as biophosbio-rudstones. © 2018, Taylor and Francis Ltd. All rights reserved. |
| title |
Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations |
| title_short |
Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations |
| title_full |
Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations |
| title_fullStr |
Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations |
| title_full_unstemmed |
Geology of the area of Embalse Las Maderas, Jujuy Province, with a note on the Tremadocian-Floian bioclastic-phosphatic accumulations |
| title_sort |
geology of the area of embalse las maderas, jujuy province, with a note on the tremadocian-floian bioclastic-phosphatic accumulations |
| publishDate |
2018 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00044822_v75_n1_p95_Duperron http://hdl.handle.net/20.500.12110/paper_00044822_v75_n1_p95_Duperron |
| _version_ |
1840322192763518976 |