Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran
International audience The Paleogene carbonate deposits of Pabdeh and Jahrum formations are widespread in the northwest of the Shahrekord region (Dashte Zari area) in the High Zagros Mountains of Iran and record lateral and upward transition from open marine into shallow water environment within the...
Main Authors: | , |
---|---|
Other Authors: | , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
HAL CCSD
2022
|
Subjects: | |
Online Access: | https://hal.science/hal-03773390 https://hal.science/hal-03773390/document https://hal.science/hal-03773390/file/BabazadehCluzelBrazilianJG2022.pdf |
id |
ftunouvellecaled:oai:HAL:hal-03773390v1 |
---|---|
record_format |
openpolar |
spelling |
ftunouvellecaled:oai:HAL:hal-03773390v1 2023-05-15T18:00:39+02:00 Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran Babazadeh, Seyed Ahmad Cluzel, Dominique Payame Noor University Institut de sciences exactes et appliquées (ISEA) Université de la Nouvelle-Calédonie (UNC) 2022 https://hal.science/hal-03773390 https://hal.science/hal-03773390/document https://hal.science/hal-03773390/file/BabazadehCluzelBrazilianJG2022.pdf en eng HAL CCSD Sociedade Brasileira de Geologia hal-03773390 https://hal.science/hal-03773390 https://hal.science/hal-03773390/document https://hal.science/hal-03773390/file/BabazadehCluzelBrazilianJG2022.pdf info:eu-repo/semantics/OpenAccess ISSN: 2317-4889 EISSN: 2317-4692 Brazilian Journal of Geology https://hal.science/hal-03773390 Brazilian Journal of Geology, In press Biostratigraphy Dashte Zari Pabdeh and Jahrum formations Zagros foreland basin Paleogene foraminifera West Iran [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology info:eu-repo/semantics/article Journal articles 2022 ftunouvellecaled 2023-02-26T16:34:31Z International audience The Paleogene carbonate deposits of Pabdeh and Jahrum formations are widespread in the northwest of the Shahrekord region (Dashte Zari area) in the High Zagros Mountains of Iran and record lateral and upward transition from open marine into shallow water environment within the Zagros foreland basin. The Pabdeh Formation shows a succession of open marine pelagic and hemipelagic limestone, argillaceous limestone, and argillaceous chert. It consists of planktonic wackestone, pellet-planktonic wackestone, mudstone with planktonic foraminifera, and radiolarian siliceous wackestone. The planktonic foraminifera are assigned to the Late Paleocene to Late Eocene, and correspond to subtropical to tropical Zones P4b-E15. Only one planktonic biozone (Zone E12), which corresponds to the high level stand of the Bartonian climate optimum (MECO) was not recognized in likely response to a tectonic event.The Jahrum Formation is represented by bioclast-bearing limestone and calcarenite. It consists of benthic foraminiferal wackestone, benthic foraminiferal-red algal packstone, and bioclast-intraclast packstone deposited in a shallow platform environment. The Jahrum Formation is inter-fingered in the upper part of the Pabdeh Formation and finally overlies it conformably during the Bartonian-Priabonian. Shallowing and offlap relationships record basin shrinking, while repeated interfingering signals moderate tectonic subsidence. Both formations are disconformably covered by the Late Oligocene-Miocene Asmari Formation. Article in Journal/Newspaper Planktonic foraminifera HAL UNC (Université de la Nouvelle Calédonie) |
institution |
Open Polar |
collection |
HAL UNC (Université de la Nouvelle Calédonie) |
op_collection_id |
ftunouvellecaled |
language |
English |
topic |
Biostratigraphy Dashte Zari Pabdeh and Jahrum formations Zagros foreland basin Paleogene foraminifera West Iran [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
spellingShingle |
Biostratigraphy Dashte Zari Pabdeh and Jahrum formations Zagros foreland basin Paleogene foraminifera West Iran [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology Babazadeh, Seyed Ahmad Cluzel, Dominique Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran |
topic_facet |
Biostratigraphy Dashte Zari Pabdeh and Jahrum formations Zagros foreland basin Paleogene foraminifera West Iran [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy [SDU.STU.PG]Sciences of the Universe [physics]/Earth Sciences/Paleontology |
description |
International audience The Paleogene carbonate deposits of Pabdeh and Jahrum formations are widespread in the northwest of the Shahrekord region (Dashte Zari area) in the High Zagros Mountains of Iran and record lateral and upward transition from open marine into shallow water environment within the Zagros foreland basin. The Pabdeh Formation shows a succession of open marine pelagic and hemipelagic limestone, argillaceous limestone, and argillaceous chert. It consists of planktonic wackestone, pellet-planktonic wackestone, mudstone with planktonic foraminifera, and radiolarian siliceous wackestone. The planktonic foraminifera are assigned to the Late Paleocene to Late Eocene, and correspond to subtropical to tropical Zones P4b-E15. Only one planktonic biozone (Zone E12), which corresponds to the high level stand of the Bartonian climate optimum (MECO) was not recognized in likely response to a tectonic event.The Jahrum Formation is represented by bioclast-bearing limestone and calcarenite. It consists of benthic foraminiferal wackestone, benthic foraminiferal-red algal packstone, and bioclast-intraclast packstone deposited in a shallow platform environment. The Jahrum Formation is inter-fingered in the upper part of the Pabdeh Formation and finally overlies it conformably during the Bartonian-Priabonian. Shallowing and offlap relationships record basin shrinking, while repeated interfingering signals moderate tectonic subsidence. Both formations are disconformably covered by the Late Oligocene-Miocene Asmari Formation. |
author2 |
Payame Noor University Institut de sciences exactes et appliquées (ISEA) Université de la Nouvelle-Calédonie (UNC) |
format |
Article in Journal/Newspaper |
author |
Babazadeh, Seyed Ahmad Cluzel, Dominique |
author_facet |
Babazadeh, Seyed Ahmad Cluzel, Dominique |
author_sort |
Babazadeh, Seyed Ahmad |
title |
Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran |
title_short |
Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran |
title_full |
Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran |
title_fullStr |
Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran |
title_full_unstemmed |
Biostratigraphy and Paleoenvironmental significance of Paleogene foraminiferal assemblages from Dashte Zari area in High Zagros, west Iran |
title_sort |
biostratigraphy and paleoenvironmental significance of paleogene foraminiferal assemblages from dashte zari area in high zagros, west iran |
publisher |
HAL CCSD |
publishDate |
2022 |
url |
https://hal.science/hal-03773390 https://hal.science/hal-03773390/document https://hal.science/hal-03773390/file/BabazadehCluzelBrazilianJG2022.pdf |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
ISSN: 2317-4889 EISSN: 2317-4692 Brazilian Journal of Geology https://hal.science/hal-03773390 Brazilian Journal of Geology, In press |
op_relation |
hal-03773390 https://hal.science/hal-03773390 https://hal.science/hal-03773390/document https://hal.science/hal-03773390/file/BabazadehCluzelBrazilianJG2022.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766169844296712192 |