The first discovery of Permian conodont fauna from peri-Gondwana cool water facies in Tibet, China

You-ye, Zheng; Xu, Runsheng; Wang, Chengyuan; Ma, Guotao

doi:10.1007/s11434-007-0168-2

Cited by 21 publications

(1 citation statement)

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“…The overlying Angie Formation is composed of limestone in the lower part and shale or mudstone interbedded with limestone lens in the upper part. The brachiopod assemblage Aulosteges ingens-Punctocyrtella nagmargensis (Zhan et al, 2007) and the conodont assemblage Mesogondolella idahoensis-Vjalovognathus shindyensis (Ji et al, 2007;Zheng et al, 2007) were reported from this formation; both suggest an Artinskian to Kungurian age with relatively cool climatic conditions.…”

Section: Stratigraphymentioning

confidence: 99%

A new Changhsingian brachiopod fauna from the Xiala Formation at Tsochen in the central Lhasa Block and its paleogeographical implications

Zhang

Feng

et al. 2019

J. Paleontol.

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Permian faunal affinity in the Lhasa Block plays a critical role in reconstructing its paleogeographic evolution. Cisuralian and Guadalupian faunas have been described from the Lhasa Block, but very few Lopingian (late Permian) brachiopods have been reported so far. In this paper, a new diverse brachiopod fauna consisting of 17 species of 17 genera and an unidentifiable Orthotetoidea is described from the uppermost part of the Xiala Formation at the Aduogabu section in the central part of the Lhasa Block. The age of this fauna can be assigned to the Changhsingian (late Lopingian) as indicated by the associated foraminifers Colaniella parva (Colani, 1924) and Reichelina pulchra Miklukho-Maklay, 1954. Characteristic brachiopods include Spinomarginifera chengyaoyenensis Huang, 1932, Haydenella wenganensis (Huang, 1932), and Araxathyris cf. dilatatus Shen, He, and Zhu, 1992. They also generally suggest a Changhsingian age. Paleobiogeographically, this fauna is uniformly composed of typical Tethyan elements represented by Spinomarginifera Huang, 1932 and Haydenella Reed, 1944, and some cosmopolitan elements, but no typical cold-water taxa of Gondwanan affinity. This is in contrast to the contemporaneous brachiopod faunas from the Tethys Himalayan region that are characterized by typical cold-water taxa of Gondwanan affinity, e.g., Costiferina indica (Waagen, 1884), Retimarginifera xizangensis Shen et al., 2000, Neospirifer (Quadrospina) tibetensis Ding, 1962. Thus, it is strongly indicative that the Lhasa Block had drifted into a relatively warm-water regime during the Changhsingian. An analysis of the paleobiogeographic change of brachiopods in the Lhasa Block throughout the entire Permian further suggests that the Lhasa Block probably had rifted away from the northern peri-Gondwanan margin between the latest Cisuralian and middle Guadalupian, that is, the Neotethys Ocean had opened before middle Guadalupian.

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Section: Stratigraphymentioning

confidence: 99%