Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau
This study of mid-Cretaceous foraminifera from the Linzhou, the Coqen and the Xigaze Basins in the southern Tibetan Plateau has provided the first high resolution biostratigraphic description of these limestones and interpretation of their paleoenvironmental settings. The fossil assemblages are domi...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1540866 2023-12-24T10:24:22+01:00 Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau Boudagher-Fadel, MK Hu, X Price, GD Sun, G Wang, J-G An, W 2017-04 text https://discovery.ucl.ac.uk/id/eprint/1540866/1/BouDagher-Fadel%20et%20al.%20text%20combined%20JFR%202017.pdf https://discovery.ucl.ac.uk/id/eprint/1540866/ eng eng https://discovery.ucl.ac.uk/id/eprint/1540866/1/BouDagher-Fadel%20et%20al.%20text%20combined%20JFR%202017.pdf https://discovery.ucl.ac.uk/id/eprint/1540866/ open Journal of Foraminiferal Research , 47 (2) pp. 188-207. (2017) Article 2017 ftucl 2023-11-27T13:07:32Z This study of mid-Cretaceous foraminifera from the Linzhou, the Coqen and the Xigaze Basins in the southern Tibetan Plateau has provided the first high resolution biostratigraphic description of these limestones and interpretation of their paleoenvironmental settings. The fossil assemblages are dominated primarily by orbitolinid larger benthic foraminifera. We reassessed the identification of many taxa, dividing the South Tibetan sedimentary successions of Aptian to Early Cenomanian age into eight new foraminiferal biozones (TLK1 a–h): (i) (TLK1a) a shallow reefal environment corresponding to planktonic foraminifera zone (PZ) Aptian 1–2, dominated by Palorbitolina and Praeorbitolina spp.; (ii) (TLK1b) a transgressive, reefal to forereefal environment corresponding to PZ Aptian 3, characterized by the first appearance of Mesorbitolina parva; (iii) (TLK1c) a shallow reefal to backreef environment of Late Aptian (PZ Aptian 4) age, characterized by the first appearance of Mesorbitolina texana; (iv) (TLK1d) a transgressive phase of forereef to an inner neritic environment of Albian (PZ Albian 1) age, characterized by the first appearance of Cuneolina pavonia; (v) (TLKe) an open-marine reefal environment of Albian (PZ Albian 2) age, with assemblages dominated by flat to slightly conical orbitolinids, characterized by the first appearance of Palorbitolinoides hedini; (vi) (TLK1f) a shallow, open-marine reefal to forereef environment of Middle Albian (PZ Albian 3) age, dominated by flat and convex orbitolinids, and characterized by the first appearance of Mesorbitolina aperta; (vii) (TLK1g) a reefal to forereef environment of end Albian (PZ Albian 4) age, characterized by the appearance of Conicorbitolina cf. cuvillieri and Pseudochoffatella cuvillieri, and in which Early Aptian species of Praeorbitolina cf. wienandsi have been recorded for the first time from the Late Albian; (viii) (TLK1h) a shallow reefal environment of Early Cenomanian age characterized by the first appearance of Conicorbitolina sp. A and Nezzazata ... Article in Journal/Newspaper Planktonic foraminifera University College London: UCL Discovery |
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Open Polar |
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University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
description |
This study of mid-Cretaceous foraminifera from the Linzhou, the Coqen and the Xigaze Basins in the southern Tibetan Plateau has provided the first high resolution biostratigraphic description of these limestones and interpretation of their paleoenvironmental settings. The fossil assemblages are dominated primarily by orbitolinid larger benthic foraminifera. We reassessed the identification of many taxa, dividing the South Tibetan sedimentary successions of Aptian to Early Cenomanian age into eight new foraminiferal biozones (TLK1 a–h): (i) (TLK1a) a shallow reefal environment corresponding to planktonic foraminifera zone (PZ) Aptian 1–2, dominated by Palorbitolina and Praeorbitolina spp.; (ii) (TLK1b) a transgressive, reefal to forereefal environment corresponding to PZ Aptian 3, characterized by the first appearance of Mesorbitolina parva; (iii) (TLK1c) a shallow reefal to backreef environment of Late Aptian (PZ Aptian 4) age, characterized by the first appearance of Mesorbitolina texana; (iv) (TLK1d) a transgressive phase of forereef to an inner neritic environment of Albian (PZ Albian 1) age, characterized by the first appearance of Cuneolina pavonia; (v) (TLKe) an open-marine reefal environment of Albian (PZ Albian 2) age, with assemblages dominated by flat to slightly conical orbitolinids, characterized by the first appearance of Palorbitolinoides hedini; (vi) (TLK1f) a shallow, open-marine reefal to forereef environment of Middle Albian (PZ Albian 3) age, dominated by flat and convex orbitolinids, and characterized by the first appearance of Mesorbitolina aperta; (vii) (TLK1g) a reefal to forereef environment of end Albian (PZ Albian 4) age, characterized by the appearance of Conicorbitolina cf. cuvillieri and Pseudochoffatella cuvillieri, and in which Early Aptian species of Praeorbitolina cf. wienandsi have been recorded for the first time from the Late Albian; (viii) (TLK1h) a shallow reefal environment of Early Cenomanian age characterized by the first appearance of Conicorbitolina sp. A and Nezzazata ... |
format |
Article in Journal/Newspaper |
author |
Boudagher-Fadel, MK Hu, X Price, GD Sun, G Wang, J-G An, W |
spellingShingle |
Boudagher-Fadel, MK Hu, X Price, GD Sun, G Wang, J-G An, W Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau |
author_facet |
Boudagher-Fadel, MK Hu, X Price, GD Sun, G Wang, J-G An, W |
author_sort |
Boudagher-Fadel, MK |
title |
Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau |
title_short |
Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau |
title_full |
Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau |
title_fullStr |
Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau |
title_full_unstemmed |
Foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-Cretaceous limestones in the southern Tibetan plateau |
title_sort |
foraminiferal biostratigraphy and palaeoenvironmental analysis of the mid-cretaceous limestones in the southern tibetan plateau |
publishDate |
2017 |
url |
https://discovery.ucl.ac.uk/id/eprint/1540866/1/BouDagher-Fadel%20et%20al.%20text%20combined%20JFR%202017.pdf https://discovery.ucl.ac.uk/id/eprint/1540866/ |
genre |
Planktonic foraminifera |
genre_facet |
Planktonic foraminifera |
op_source |
Journal of Foraminiferal Research , 47 (2) pp. 188-207. (2017) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/1540866/1/BouDagher-Fadel%20et%20al.%20text%20combined%20JFR%202017.pdf https://discovery.ucl.ac.uk/id/eprint/1540866/ |
op_rights |
open |
_version_ |
1786199070454317056 |