Palaeoenvironmental reconstruction and sequence stratigraphy of the Lower Cretaceous deposits in the Zagros belt, SW Iran
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| Format: | Artículo científico |
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Sociedad Geológica Mexicana, A.C.
2020
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| author | Seyed Mohammad Ali Moosavizadeh |
| author_facet | Seyed Mohammad Ali Moosavizadeh |
| contents | Palaeoenvironmental reconstruction and sequence stratigraphy of the Lower Cretaceous deposits in the Zagros belt, SW Iran Seyed Mohammad Ali Moosavizadeh Hamed Zand-Moghadam Amir Hossein Rahiminejad Ciencias de la Tierra Facies Aptian Albian Zagros fold thrust belt Depositional environments and sequence stratigraphy of the Lower Cretaceous deposits of the Dariyan Formation were studied in the Zagros belt, SW Iran. The Dariyan Formation was investigated in the Interior Fars and the Izeh Zone in the SE margin of the Kazhdumi intra-shelf Basin, which has not been previously studied. Based on the benthic foraminifera, the Dariyan Formation is early Aptian to early Albian in age. The studies show that the Dariyan Formation was deposited in deep open-marine, shallow open-marine, shoal, and lagoonal settings on a homoclinal ramp. Three third-order depositional sequences (Ds1, Ds2, and Ds3) and three type 2 sequence boundaries (SB2) were recognized. The depositional sequences in the Dariyan Formation comprise three transgressive systems tracts (TSTs) and two highstand systems tracts (HSTs). During sea-level rise in the earliest Aptian, the Dariyan Formation was deposited on top of the the Barremian Gadvan Formation. Deep open-marine subsidence and sea-level rise led to deposition of radiolarian-bearing facies of the Dariyan Formation during the earliest Aptian. Subsequently, HSTs resulted in deposition of orbitolinid-rich facies in the deep open-marine setting (late early Aptian). Planktic foraminifera-bearing deposits were deposited during the subsequent sea-level rise (early late Aptian). Sea-level fall subsequently resulted in progradation of platform top (shallow open-marine, shoal, and lagoon) deposits into the deep open-marine setting (latest Aptian). Finally, sea-level rise resulted in deposition of the Albian Kazhdumi Formation on the Dariyan Formation during the early Albian. The sea-level changes recorded for the Dariyan Formation are consistent with Early Cretaceous sea-level patterns recognized else-where on the Arabian Plate. 2020 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94366150003 https://www.redalyc.org/journal/943/94366150003/ https://www.redalyc.org/journal/943/94366150003/html/ https://www.redalyc.org/journal/943/94366150003/94366150003.epub https://www.redalyc.org/journal/943/94366150003/movil 10.18268/BSGM2020v72n2a060919 en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.2 Vol.72 |
| format | Artículo científico |
| id | redalyc_94366150003 |
| institution | Redalyc |
| language | en |
| publishDate | 2020 |
| publisher | Sociedad Geológica Mexicana, A.C. |
| spellingShingle | Palaeoenvironmental reconstruction and sequence stratigraphy of the Lower Cretaceous deposits in the Zagros belt, SW Iran Seyed Mohammad Ali Moosavizadeh Ciencias de la Tierra Facies Aptian Albian Zagros fold thrust belt Palaeoenvironmental reconstruction and sequence stratigraphy of the Lower Cretaceous deposits in the Zagros belt, SW Iran Seyed Mohammad Ali Moosavizadeh Hamed Zand-Moghadam Amir Hossein Rahiminejad Ciencias de la Tierra Facies Aptian Albian Zagros fold thrust belt Depositional environments and sequence stratigraphy of the Lower Cretaceous deposits of the Dariyan Formation were studied in the Zagros belt, SW Iran. The Dariyan Formation was investigated in the Interior Fars and the Izeh Zone in the SE margin of the Kazhdumi intra-shelf Basin, which has not been previously studied. Based on the benthic foraminifera, the Dariyan Formation is early Aptian to early Albian in age. The studies show that the Dariyan Formation was deposited in deep open-marine, shallow open-marine, shoal, and lagoonal settings on a homoclinal ramp. Three third-order depositional sequences (Ds1, Ds2, and Ds3) and three type 2 sequence boundaries (SB2) were recognized. The depositional sequences in the Dariyan Formation comprise three transgressive systems tracts (TSTs) and two highstand systems tracts (HSTs). During sea-level rise in the earliest Aptian, the Dariyan Formation was deposited on top of the the Barremian Gadvan Formation. Deep open-marine subsidence and sea-level rise led to deposition of radiolarian-bearing facies of the Dariyan Formation during the earliest Aptian. Subsequently, HSTs resulted in deposition of orbitolinid-rich facies in the deep open-marine setting (late early Aptian). Planktic foraminifera-bearing deposits were deposited during the subsequent sea-level rise (early late Aptian). Sea-level fall subsequently resulted in progradation of platform top (shallow open-marine, shoal, and lagoon) deposits into the deep open-marine setting (latest Aptian). Finally, sea-level rise resulted in deposition of the Albian Kazhdumi Formation on the Dariyan Formation during the early Albian. The sea-level changes recorded for the Dariyan Formation are consistent with Early Cretaceous sea-level patterns recognized else-where on the Arabian Plate. 2020 artículo científico 1405-3322 https://www.redalyc.org/articulo.oa?id=94366150003 https://www.redalyc.org/journal/943/94366150003/ https://www.redalyc.org/journal/943/94366150003/html/ https://www.redalyc.org/journal/943/94366150003/94366150003.epub https://www.redalyc.org/journal/943/94366150003/movil 10.18268/BSGM2020v72n2a060919 en http://www.redalyc.org/revista.oa?id=943 Boletín de la Sociedad Geológica Mexicana application/pdf Sociedad Geológica Mexicana, A.C. Boletín de la Sociedad Geológica Mexicana (México) Num.2 Vol.72 |
| title | Palaeoenvironmental reconstruction and sequence stratigraphy of the Lower Cretaceous deposits in the Zagros belt, SW Iran |
| topic | Ciencias de la Tierra Facies Aptian Albian Zagros fold thrust belt |
| url | https://www.redalyc.org/articulo.oa?id=94366150003 https://www.redalyc.org/journal/943/94366150003/ https://www.redalyc.org/journal/943/94366150003/html/ https://www.redalyc.org/journal/943/94366150003/94366150003.epub https://www.redalyc.org/journal/943/94366150003/movil |