globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2014.03.021
论文题名:
Devonian-Carboniferous transition containing a Hangenberg Black Shale equivalent in the Pho Han Formation on Cat Ba Island, northeastern Vietnam
作者: Komatsu T.; Kato S.; Hirata K.; Takashima R.; Ogata Y.; Oba M.; Naruse H.; Ta P.H.; Nguyen P.D.; Dang H.T.; Doan T.N.; Nguyen H.H.; Sakata S.; Kaiho K.; Königshof P.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 404
起始页码: 30
结束页码: 43
语种: 英语
英文关键词: Anoxic to dysoxic facies ; Devonian-Carboniferous boundary ; Extinction ; Hangenberg Black Shale ; Recovery
英文摘要: On Cat Ba Island in northeastern Vietnam, the Devonian to Carboniferous (D-C) transition consists mainly of ramp carbonates intercalated with black shale beds (Beds 1 to 176) in the Pho Han Formation and is one of the few records of the D-C transition of the eastern Paleotethys. The three main facies of the sequence are Facies 1 (alternations of whitish gray to gray limestone and marl), Facies 2 (calcirudite, Bed 115b), and Facies 3 (alternations of dark gray limestone and organic-carbon-rich black shale, Beds 115c-120 and 126-129). The latest Famennian (Siphonodella praesulcata Subzone) conodont assemblage of S. praesulcata, Palmatolepis gracilis, Palmatolepis sigmoidalis, and Rhodalepis polylophodontiformis was recognized in Beds 113-115c. Beds 105-112 commonly contain Palmatolepis expansa, P. gracilis, and P. sigmoidalis. Bed 119 yielded a basal Carboniferous index conodont Siphonodella sulcata. In Beds 116-118, solenoporids such as Pseudochaetetes elliotti and Parachaetetes sp. were characteristic species in organic-carbon-rich dark gray limestone. Facies 1 is characterized by bioclastic, peloidal, and intraclastic grainstone and packstone containing massive normal grading and cross-laminations, and is interpreted to represent deep ramp carbonates above storm wave base. Facies 2 is represented by typical lag deposits overlying a transgressive surface. Facies 3 comprises organic-carbon-rich black shale and minor scour-filling bioclastic, peloidal, and intraclastic packstone, and may represent a marginal basin plain environment surrounding a carbonate ramp. The alternations of organic-carbon-rich black shale and dark gray packstone (Facies 3) show no evidence of bioturbation and have high TOC contents (0.18-5.73. wt.%). A minor succession within the transgressive lag deposits (from Bed 115b of Facies 2 to Beds 115c-120 in the lower part of Facies 3) is equivalent to the Hangenberg Black Shale (s. l.) in the middle part of the Siphonodella praesulcata to Siphonodella sulcata zones, because Beds 115b-120 characterized by no evidence of bioturbation and high TOC contents are interpreted to be accumulated in anoxic to dysoxic conditions. We report Devonian-Carboniferous transitions in the Pho Han Fm., Vietnam.P. expansa, S. praesulcata, S. sulcata and S. duplicata zones are recognized. The D-C transition is composed of deep ramp and marginal basin plain deposits. The D-C transition is characterized by a typical transgressive succession. The section intercalates anoxic to dysoxic facies dominated by organic-rich deposits. © 2014 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69342
Appears in Collections:过去全球变化的重建

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作者单位: Graduate School of Science and Technology, Kumamoto University, Kumamoto 806-8555, Japan; The Center for Academic Resources and Archives, Tohoku University Museum, Tohoku University, Aramaki Aza Aoba 6-3, Aoba-ku, Sendai 980-8578, Japan; Institute of Geology and Paleontology, Graduate School of Science, Tohoku University, Aramaki Aza Aoba 6-3, Aoba-ku, Sendai 980-8578, Japan; Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan; College of Sciences, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Viet Nam; Vietnam Institute of Geosciences and Mineral Resources (VIGMR), Hanoi, Viet Nam; Vietnam National Museum of Nature (VNMN), Hanoi, Viet Nam; Institute for Geo-Resources and Environment, National Institute of Advanced Industrial Science and Technology (AIST), 1-1-1 Higashi, Tsukuba 305-8567, Japan; Senckenberg Research Institute and Natural History Museum Frankfurt, Senckenberganlage 25, 60325 Frankfurt am Main, Germany

Recommended Citation:
Komatsu T.,Kato S.,Hirata K.,et al. Devonian-Carboniferous transition containing a Hangenberg Black Shale equivalent in the Pho Han Formation on Cat Ba Island, northeastern Vietnam[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,404
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