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Artinskian (Early Permian) fusuline fauna from the Rongma area in northern Tibet: palaeoclimatic and palaeobiogeographic implications
Authors:Yi-Chun Zhang  Yue Wang  Yu-Jie Zhang  Dong-Xun Yuan
Abstract:Zhang, Y.C., Wang, Y., Zhang, Y.J. & Yuan, D.X., 2013. Artinskian (Early Permian) fusuline fauna from the Rongma area in northern Tibet: palaeoclimatic and palaeobiogeographic implications. Alcheringa 37, 529–546. ISSN 0311–5518.

A fusuline fauna consisting of ten species in five genera from the Qudi Formation of the Jiaomuri and Gangtangcuo sections in the Rongma area, northern Tibet, is described. This fauna contains a few typical Peri-Gondwanan fusuline species such as Pseudofusulina pamirensis, Neodutkevitchia insignis and N. sp. cf. N. tumidiscula. The fauna is dated as Artinskian based on the presence of both genera Chalaroschwagerina and Praeskinnerella. The Peri-Gondwanan fusuline fauna in the Qiangtang Block is grouped palaeobiogeographically into the Southern Transitional Zone, which is located in the southern part of the Peri-Gondwanan blocks during the late Sakmarian and Artinskian. Moreover, the occurrence of the Peri-Gondwanan fusuline fauna, the lithological transition from glacimarine deposits to carbonates, and the Peri-Gondwanan fusulines’ apparent southeastward migration from the Kalmard Block of central Iran during the Artinskian, are interpreted here to be the result of global warming after the peak of the Late Palaeozoic Ice Age.

Yi-chun Zhang geozyc@yahoo.com], School of Life and Environmental Sciences, Deakin University, Melbourne Burwood Campus, 221 Burwood Highway, Burwood, Victoria 3125, Australia; State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing 210008, PR China; Yue Wang yuewang@nigpas.ac.cn], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing 210008, PR China; Yu-jie Zhang zebiac@163.com], Chengdu Center, China Geological Survey, 2 Renming Road North, Chengdu 610081, PR China; Dong-xun Yuan yuanzi55@163.com], State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, 39 East Beijing Road, Nanjing 210008, China; Department of Earth Sciences, Nanjing University, 22 Hankou Road, Nanjing 210008, PR China. Received 12.3.2013; revised 2.5.2013; accepted 12.5.2013.
Keywords:Fusuline foraminifera  Tibet  Qiangtang Block  Permian  Artinskian  Peri-gondwana  palaeobiogeography
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