Late Paleozoic faunal, climatic, and geographic changes in the Baoshan block as a Gondwana-derived continental fragment in southwest China

Wang, X.-D; Ueno, Katsumi; Mizuno, Yoshihiro; Sugiyama, Tetsuo

doi:10.1016/s0031-0182(01)00228-0

Cited by 107 publications

(74 citation statements)

References 14 publications

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“…Metcalfe (1996aMetcalfe ( , b, 2002 has proposed the existence of a Meso-Tethys ocean basin that was opened in late Early Permian and closed before Late Cretaceous times. Between Gondwana and Laurentia, numerous micro-continents or continental blocks, such as Cimmeria (Sengö r 1988), Sibumasu, and the Lhasa block (e.g., Metcalfe 1996a, b;Jin 2002;Wang et al 2001), were rifted from the northern margin of Gondwana and were subsequently accreted to the Eurasian continent during the Paleozoic and Mesozoic (Metcalfe 1996a, b;Ueno 2000). Besides biogeographical constraints, provenance analysis of the basements of these micro-continents is crucial for understanding the origin and tectonic processes, which led to the formation of the Tethyan orogenic belt.…”

Section: Introductionmentioning

confidence: 99%

Zircon age and Nd–Hf isotopic composition of the Yunnan Tethyan belt, southwestern China

Chen

Wang

et al. 2006

Int J Earth Sci (Geol Rundsch)

282

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The Baoshan block of the Tethyan Yunnan, southwestern China, is considered as northern part of the Sibumasu microcontinent. Basement of this block that comprises presumably greenschist-facies Neoproterozoic metamorphic rocks is covered by Paleozoic to Mesozoic low-grade metamorphic sedimentary rocks. This study presents zircon ages and Nd-Hf isotopic composition of granites generated from crustal reworking to reveal geochemical feature of the underlying basement.

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Section: Introductionmentioning

confidence: 99%

Zircon age and Nd–Hf isotopic composition of the Yunnan Tethyan belt, southwestern China

Chen

Wang

et al. 2006

Int J Earth Sci (Geol Rundsch)

282

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“…Of these tectonic units, the Lanping-Simao Block and Lincang Massif constitute parts of the Cathaysian palaeogeographical domain, of which the latter formed a Permo-Triassic island arc by the subduction of Palaeotethyan oceanic lithosphere along the margin of the former, with a back-arc basin now represented by the Jinghong Suture (Ueno, 1999(Ueno, , 2002Sone and Metcalfe, 2008). In contrast, the Baoshan and Tengchong blocks are included in the Eastern Cimmerian Continent based on their Carboniferous-Permian stratigraphy and shallow-marine fossil faunas (Jin, 1994;Wang et al, 2001;Ueno, 2003).…”

Section: Changning-menglian Belt In West Yunnanmentioning

confidence: 99%

The Lopingian (Late Permian) of mid‐oceanic carbonates in the Eastern Palaeotethys: stratigraphical outline and foraminiferal faunal succession

2010

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The Changning-Menglian Belt of West Yunnan, SW China and the Inthanon Zone of Northern Thailand are the two best-studied Palaeotethyan collisional belts in Asia. These belts comprise thick pure carbonate successions with basalt at the base, ranging from the Early Carboniferous to the end of the Permian. They are interpreted to have a mid-oceanic buildup x origin and have been formed on the top of seamounts and/or oceanic plateaus. The mid-oceanic carbonates in the Inthanon Zone are called the Doi Chiang Dao Limestone and we newly propose in this paper the term Banka Limestone for those in the Changning-Menglian Belt. Foraminiferal faunas from these limestones revealed that they have good Lopingian records of a mid-oceanic shallow-marine domain in the Palaeotethys, and three consecutive foraminiferal zones can be established. The Wuchiapingian is represented by the Codonofusiella kwangsiana Zone comprising four fusuline and 21 non-fusuline foraminiferal genera. The early Changhsingian is distinguished by the Palaeofusulina simplicata/minima Zone, and contains seven fusuline and 27 non-fusuline genera. The succeeding Palaeofusulina sinensis/prisca Zone in the late Changhsingian is characterized by the occurrence of large and advanced Palaeofusulina, and still maintained a high generic diversity with eight fusuline and 36 non-fusuline genera. The Lopingian foraminiferal faunal succession of the mid-oceanic Palaeotethys is essentially similar to those observed in cratonic South China. This is suggestive of a major oceanic part of the Palaeotethys to be included palaeobiogeographically in the Cathaysian Province. The coeval Neotethyan domain also had a high-diversified fauna with the occurrence of six fusuline and nearly 30 non-fusuline genera but lacked Palaeofusulina in Changhsingian time. Panthalassan mid-oceanic build-ups during Lopingian time carried likely lower foraminiferal diversity than those of the Palaeo-and Neotethys. Essentially, Tethyan mid-oceanic carbonate buildups x presumably provided a peculiar habitat suitable for shallow-marine foraminifers in a pelagic equatoro-tropical setting throughout almost the entire Lopingian time.

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“…Wang et al [17] summarized five different environments of small, solitary, non-dissepimented corals: 1) lower part of continental shelf at warm and barrierless coast; 2) deep water region at continental margin; 3) cold water shallow sea; 4) warm shallow sea with abundant clastic supply; 5) normal shallow sea at biotic crisis events. Wang et al [18][19][20][21][22] also studied Mississippian rugose corals from Baoshan, West Yunnan, Southwest China and suggested that occurrences of the Cyathaxonia fauna are related to mud-rich, deep, and low energy environments.…”

Section: Overview Of the Cyathaxonia Fauna Studiesmentioning

confidence: 99%

“…Although most abundant small, solitary, and non-dissepimented corals occur in Yunnan [6,7,18,[20][21][22][31][32][33], Tibet (Xizang) [4,5,15,48,49], Xinjiang [16,23,24,[40][41][42]50], and Inner Mongolia [37,38,54], there is no special distribution pattern. Small solitary rugose corals belonging to the Cyathaxonia fauna also occur in many areas of China such as Guangxi, Guizhou, Hunan, Jiangsu, and others, which are paleobiogeographically Tethyan region during Carboniferous and Permian time.…”

Section: Composition and Distributions Of The Carboniferous And Permimentioning

confidence: 99%

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Carboniferous-Permian rugose coral Cyathaxonia faunas in China

Wang

Yiqiang

Lin

2010

Sci. China Earth Sci.

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The Cyathaxonia faunas are widely distributed in the Carboniferous and Permian strata in China. The fauna in China contains 12 families and 40 genera, and can be recognized as three episodes from Early Carboniferous to the end-Permian in terms of their occurrence and composition: 1) Mississippian; 2) Pennsylvanian-Early Permian; 3) Middle Permian-Late Permian. They were relatively abundant in episodes 1 and 2. A decrease of family Antiphyllidae and an increase of family Hapsiphyllidae can be observed from Early Carboniferous to the end-Permian. Two case studies are given to illustrate the bio-facies of the Cyathaxonia faunas, which are from the Mississippian of Baoshan, West Yunnan and the Mississippian of Chaohu, South Anhui. In both areas, Cyathaxonia faunas occur just below the large dissepimented solitary and compound coral assemblages in a continuous sequence in a single section, which implies that the occurrence of these small, non-dissepimented solitary corals is not strictly related with Gondwanan or Peri-gondwanan cold water environment, but might be controlled by such benthic conditions as deeper, mud-rich, quieter, and darker sedimentary environments.Cyathaxonia fauna was first introduced by Hill [1]. In the investigation of rugose corals from Scotland, she recognized three coral assemblages based on the relationships between coral occurrences and sedimentary facies, i.e., the major coral biofacies, in Carboniferous: 1) Cyathaxonia fauna, 2) Caninid-Clisiophyllum Fauna, and 3) Reef-Coral Fauna. The first assemblage is also known as the small, solitary, non-dissepimented coral fauna due to their simple morphological features that characterized all those corals of this fauna. Incidentally, the taxon Cyathaxonia does not necessarily always occur in this fauna.The occurrences of compound colonies of modern corals, especially the coral reefs, are an index of low latitude temperate zone or tropic areas with moderate temperature, indicating a warm and clean seawater environment. The small solitary corals in present sea, however, not only appear in the coral reefs, but also live in various ecological conditions, e.g., deep water or middle latitude regions [2]. The study on the extinct rugose corals and their ecological significance has had a long history among coral experts [3]. There are few arguments over the ecology of the reef building colonial and large solitary rugose corals. But many disagreements remain on the ecology of small solitary non-disepimented rugose corals. These morphologically simple, widely distributed and slowly evolving taxa in the Carboniferous and Permian are of little use in biostratigraphic aspects but bear relatively highly on the paleoecology and paleogeography. Some Chinese researchers hold that the small, solitary, non-dissepimented rugose corals in the Carboniferous and Permian were cold-water inhabitants [4][5][6][7]. Such an opinion was originated from a relatively abundant occurrence of small solitary rusose corals in Tibet and

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Late Paleozoic faunal, climatic, and geographic changes in the Baoshan block as a Gondwana-derived continental fragment in southwest China

Cited by 107 publications

References 14 publications

Zircon age and Nd–Hf isotopic composition of the Yunnan Tethyan belt, southwestern China

Zircon age and Nd–Hf isotopic composition of the Yunnan Tethyan belt, southwestern China

The Lopingian (Late Permian) of mid‐oceanic carbonates in the Eastern Palaeotethys: stratigraphical outline and foraminiferal faunal succession

Carboniferous-Permian rugose coral Cyathaxonia faunas in China

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