Permian fusulinid biostratigraphy of the Baoshan Block in western Yunnan, China with constraints on paleogeography and paleoclimate

Huang, Hao; Shi, Yukun; Jin, Xiaochi

doi:10.1016/j.jseaes.2014.10.010

Cited by 22 publications

(20 citation statements)

References 57 publications

(86 reference statements)

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“…In addition, numerous neoschwagerinids and verbeekinids have been documented in the middle Permian Shazipo Formation in the southern Baoshan Block (Huang et al . , ). The widespread occurrence of neoschwagerinids and verbeekinids in the Sibumasu and Baoshan Blocks has challenged the interpretation of Ueno ().…”

Section: Discussionmentioning

confidence: 99%

Middle Permian fusulines from the Thitsipin Formation of Shan State, Myanmar and their palaeobiogeographical and palaeogeographical implications

Zhang

Aung

Shen

et al. 2020

Papers in Palaeontology

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Fusuline faunas including 29 species belonging to 19 genera/subgenera are described from the Thitsipin Formation in eight sections/localities on the Shan Plateau in eastern Myanmar. These fusulines broadly indicate a Midian (middle Permian, Guadalupian) age. The lower diversity and the presence of some genera, such as Monodiexodina and Eopolydiexodina, suggest that the Sibumasu Block belonged to the palaeobiogeographic Cimmerian Province during the Midian. Furthermore, quantitative cluster analysis of middle Permian fusulines from the Shan Plateau and adjacent Cimmerian blocks suggests close faunal affinities between the Sibumasu Block and the Baoshan Block in western Yunnan. More importantly, the widespread occurrence of fusulines Eopolydiexodina afghanensis and Jinzhangia shengi on the Shan Plateau is similar to that of contemporaneous fusuline faunas from the Baoshan Block and the South Qiangtang Block but different to that of the Tengchong and Lhasa Blocks, which are dominated by the characteristic Nankinella-Chusenella assemblage. This faunal discrepancy provides strong evidence that the Bangong-Nujiang suture passes through the Gaoligong Orogen in western Yunnan rather than through the Myitkyina ophiolites in northern Myanmar. Additionally, palaeobiogeographical analysis of these fusuline faunas from the Lhasa, Tengchong, South Qiangtang, Baoshan and Sibumasu Blocks implies that the Bangong-Nujiang Ocean might have been present before the Midian.

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Section: Discussionmentioning

confidence: 99%

Middle Permian fusulines from the Thitsipin Formation of Shan State, Myanmar and their palaeobiogeographical and palaeogeographical implications

Zhang

Aung

Shen

et al. 2020

Papers in Palaeontology

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“…It is noteworthy that the Chusenella species in the Xainza area are rather small, displaying a certain similarity to those of the Tengchong Block as mentioned before. In the Baoshan Block, Chusenella was found in various locations with Schwagerina , Rugosofusulina , or Nankinella (Huang et al, 2015b). The genus has not been reported yet from the Shan State.…”

Section: Discussionmentioning

confidence: 99%

“…The Gondwana-derived blocks were geographically reconstructed to lie in a southern transitional region between the Paleo-equator and temperate/cool Gondwanan Pangea during most of the Permian (Shi et al, 1995; Grunt and Shi, 1997; Shi and Archbold, 1998; Ueno, 2003). Most Group 2 members, i.e., PTNPM, Shan State, Baoshan Block, are interpreted to occur in the higher latitude portion of the southern transition region (Ueno, 2003; Huang et al, 2015a, 2015b, personal communication, 2016). In this regard, the Tengchong Block shares more similarities with these temperate marine blocks.…”

Section: Discussionmentioning

confidence: 99%

“…(1-3, 4-6) Scale bars = 1 mm; (3a) scale bar = 200 µm. Wang et al, 1981;Zhu, 1982;Zhang et al, 1985;Nie and Song, 1990;Cheng et al, 2005;Huang et al, 2007;Zhang et al, 2010;Zhang et al, 2013Ingavat-Helmcke, 1993Fontaine et al, 1994;Hassan et al, 2014Oo et al, 2002Latt et al, 2008Ueno, 2003Huang et al, 2009;Shi et al, 2011;Huang et al, 2015aHuang et al, , 2015b Geological survey of Yunnan, 1979Yunnan, , 1985Yunnan, , 1986Fan, 1993;Nie et al, 1993;Shi et al, 2008 Numbers in square brackets indicate genera number of Pseudoschwagerininae; starred genera and numbers within parentheses refer to those of Verbeekinidae and Neoschwagerinidae.…”

Section: Shi Et Al-depauperate Fusulinid Faunas Of the Tengchong Blockmentioning

confidence: 99%

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Depauperate fusulinid faunas of the Tengchong Block in western Yunnan, China, and their paleogeographic and paleoenvironmental indications

Shi

Huang²,

Jin³

2016

J. Paleontol.

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Abstract.-New samples of fusulinids collected in the Tengchong Block, western Yunnan, China, are systematically studied and presented here. The fusulinid fauna from the Xishancun section in the Shanmutang area is dominated by Chusenella and Nankinella, whereas that from the Shuangheyan area is composed mainly of Chusenella and Schwagerina. Both faunas are dated as Roadian-Capitanian (middle Permian). These new findings are integrated with fusulinid taxa reported earlier from the block to demonstrate the taxonomic features and paleogeographic significance of Permian fusulinids. The low generic diversity through early and middle Permian and the paucity of middle Permian neoschwagerinids and verbeekinids in the block confirm its Gondwana-affinity attributes. Moreover, the Permian fusulinids of the Tengchong Block are depauperate; i.e., consisting of a limited number of species with abundant individuals. This particular feature commonly suggests an inhospitable environment, and carbonates of varied facies containing these faunas in the Tengchong Block suggest a facies-independent factor as the reason, most likely the relatively low temperature of seawater.

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“…Carbonates formed in shelf environments in different latitudinal belt possess distinctive features which can be used for paleoclimatic interpretation. Recently, shallow-water carbonates have been the interest of many workers for paleoclimate analyses (Huang, Shi, & Jin, 2015;Weidlich, 2007;Yan, Liang, & Wu, 2004;Zubin-Stathopoulos, Beauchamp, Davydov, & Henderson, 2013). Skeletal associations in carbonates are reliable features to distinguish between warm from cool and cold water carbonates.…”

Section: Skeletal Grainsmentioning

confidence: 99%

Evidence of warm climate during late Sakmarian–early Artinskian in Posht‐e Badam Block, Central Iran and its paleogeographic implication

Arefifard

2017

Geological Journal

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Examination of the geochemical data, faunal associations, and bauxite/laterite horizons in the Khan Formation, in Kalmard area, Posht‐e Badam Block, Central Iran are presented. The data provide insights on the paleogeographic position of Central Iran as part of the Cimmerian during the late Sakmarian–early Artinskian time. Bauxite/laterite as valuable warm and humid paleoclimate proxies are observed in all studied sections of the mixed siliciclastic‐carbonate Khan Formation and are meters to tens of meters thick. The warm and humid climate is also verified by the previous studies of Khan Formation sandstones yielding high chemical weathering and highly mature quartz grains. Plant fossils recovered from these sandstones are further evidence of the warm and wet climate. The results of the geochemical studies of the Khan Formation carbonates are in robust agreement with the inferred paleoclimate condition from bauxite/laterite horizons and sandstone studies of the Khan Formation. The bivariate plot of major and minor elements shows that aragonite as an indicator of warm water conditions was the major carbonate mineralogy of the Khan Formation limestones. Temperature calculation based on the heaviest oxygen isotope value of the least‐altered sample indicates that the temperature was around 36 and 29 °C for dolomites and limestones of the Khan Formation, respectively. The skeletal grains of the Khan Formation limestones are representative of a photozoan association with fusulinids, smaller foraminifers, calcareous algae, and common crinoids, brachiopods and bryozoans and also ooids and peloids as non‐skeletal grains. Therefore, the results of this study are not in agreement with previous fusulinid‐based paleogeographic interpretations, which suggested a high‐latitude paleoposition for the Posht‐e Badam Block and its separation from other Central Iran terrains during the late Sakmarian–early Artinskian. These data indicate that Posht‐e Badam Block was part of Central Iran during the late Sakmarian–early Artinskian, and its paleoposition was at a low paleolatitude.

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Permian fusulinid biostratigraphy of the Baoshan Block in western Yunnan, China with constraints on paleogeography and paleoclimate

Cited by 22 publications

References 57 publications

Middle Permian fusulines from the Thitsipin Formation of Shan State, Myanmar and their palaeobiogeographical and palaeogeographical implications

Middle Permian fusulines from the Thitsipin Formation of Shan State, Myanmar and their palaeobiogeographical and palaeogeographical implications

Depauperate fusulinid faunas of the Tengchong Block in western Yunnan, China, and their paleogeographic and paleoenvironmental indications

Evidence of warm climate during late Sakmarian–early Artinskian in Posht‐e Badam Block, Central Iran and its paleogeographic implication

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