Bone diagenesis of tetrapods from the Middle Triassic Tarjados Formation: implication for depositional environment and palaeoclimate

2021 ◽  
Author(s):  
Adriana Cecilia Mancuso ◽  
Elena Previtera
Keyword(s):  
Depositional Environment ◽  
Middle Triassic ◽  
Bone Diagenesis

Global carbon isotope signal in the Middle Triassic on Svalbard

2021 ◽  
Author(s):  
Victoria S. Engelschiøn ◽  
Øyvind Hammer ◽  
Fredrik Wesenlund ◽  
Jørn H. Hurum ◽  
Atle Mørk
Keyword(s):  
Carbon Isotope ◽  
Depositional Environment ◽  
Middle Triassic ◽  
Barents Sea ◽  
Water Productivity ◽  
Sedimentary Environment ◽  
The Arctic ◽  
Late Triassic ◽  
Triassic Boundary ◽  
Thin Sections

<p>Several carbon isotope curves were recently published for the Early and Middle Triassic in Tethys. Recent work has also been done on the Early Triassic of Svalbard, but not yet for the Middle Triassic. This work is the first to measure δ<sup>13</sup>C for different Middle Triassic localities on Svalbard, which was then part of the Boreal Ocean on northern Pangea. Our aim is to understand the controls on the Svalbard carbon isotope curve and to place them in a global setting.</p><p>Correlating Triassic rocks around the world is interesting for several reasons. The Triassic Period was a tumultuous time for life, and the Arctic archipelago of Svalbard has shown to be an important locality to understand the early radiation of marine vertebrates in the Triassic. Much effort is also made to understand the development of the Barents Sea through Svalbard’s geology.</p><p>Carbon isotope curves are controlled by depositional environment and global fluctuations. Global factors such as the carbon cycle control the long-term carbon isotopic compositions, while short-term fluctuations may reflect the origin of organic materials in the sediment (e.g. algal or terrestrial matter), stratification of the water column, and/or surface water productivity. Carbon isotopes can therefore be useful to understand the depositional environment and to correlate time-equivalent rocks globally.</p><p>The dataset was collected through three seasons of fieldwork in Svalbard with localities from the islands Spitsbergen, Edgeøya and Bjørnøya. Detailed stratigraphic sampling has resulted in high-resolution δ<sup>13</sup>C curves. These show three strong transitions; 1) on the boundary between the Early and Middle Triassic, 2) in the middle of the formation and 3) at the Middle and Late Triassic boundary. Several Tethyan localities show a possibly similar Early-Middle Triassic signal. Current work in progress is sedimentological analysis by thin sections and X-ray fluorescence spectroscopy (XRF) to further understand the sedimentary environment.</p>

Facies analysis and depositional environment of the Geli Khana Formation (Middle Triassic), Northern Iraq

2014 ◽  
Vol 8 (7) ◽  
pp. 4765-4777 ◽  
Author(s):  
Ali Ismail Al-Juboury ◽  
Mohammed A. Al-Haj ◽  
Wrya Jihad Jabbar
Keyword(s):  
Depositional Environment ◽  
Middle Triassic ◽  
Facies Analysis ◽  
Northern Iraq

Geochemistry of Middle Triassic radiolarian cherts from northern Thailand: Implication for depositional environment

2011 ◽  
Vol 22 (6) ◽  
pp. 688-703 ◽  
Author(s):  
Hathaithip Thassanapak ◽  
Mongkol Udchachon ◽  
Chongpan Chonglakmani ◽  
Qinglai Feng
Keyword(s):  
Depositional Environment ◽  
Middle Triassic ◽  
Northern Thailand

scholarly journals Deep-water ostracods from the Middle Anisian (Reifling Formation) of the Northern Calcareous Alps (Austria)

2015 ◽  
Vol 34 (1) ◽  
pp. 71-91 ◽  
Author(s):  
Wolfgang Mette ◽  
Avi Honigstein ◽  
Sylvie Crasquin
Keyword(s):  
New Species ◽  
Deep Water ◽  
Depositional Environment ◽  
Middle Triassic ◽  
Taxonomic Composition ◽  
Northern Calcareous Alps ◽  
Northern Calcareous ◽  
First Time ◽  
Neritic Species

Abstract. A diverse silicified ostracod aassemblage from Middle Anisian, Middle Triassic, intra-shelf basin deposits (Reifling Formation) is described. It comprises 32 species, of which 5 are new species (Bairdia biforis n. sp., B. schneebergiana n. sp., Mirabairdia praepsychrosphaerica n. sp., M. plurispinosa n. sp., Bairdiacypris aequisymmetrica n. sp.). The assemblage consists of both neritic species and deep-water taxa which have been considered as representatives of the ‘Thuringian Ecotype’ or the ‘Palaeopsychrospheric Fauna’. Lithofacies, palaeogeographical setting and taxonomic composition are suggestive of a deep neritic to upper bathyal depositional environment. ‘Archaic’ faunal elements are relatively rare and include the genera Spinomicrocheilinella and Processobairdia, which were formerly known only from the Palaeozoic and are now recorded for the first time from the Mesozoic.

Depositional environment of Middle Triassic organic‐rich shales in the Ordos Basin, Northwest China

2021 ◽  
Author(s):  
Xiangdong Zhao ◽  
Wei Wang ◽  
Guwei Xie ◽  
Songqi Pan ◽  
Edmund A. Jarzembowski ◽  
...  
Keyword(s):  
Depositional Environment ◽  
Middle Triassic ◽  
Ordos Basin ◽  
Northwest China ◽  
The Ordos Basin
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