DOI: 10.1016/j.palaeo.2015.09.001
论文题名: Ordovician stable carbon isotope stratigraphy in the Tarim Basin, NW China
作者: Zhang Y. ; Munnecke A.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2016
卷: 458 起始页码: 154
结束页码: 175
语种: 英语
英文关键词: Chemostratigraphy
; Ordovician
; Source rocks
; Stable carbon isotope
; Tarim
英文摘要: The Tarim Basin, located in NW-China, represents one of China's major palaeoplates. Its palaeogeographic position in the Ordovician, however, is debated. In this study we present biostratigraphically controlled stable carbon isotope data from some 600 samples spanning almost the entire Ordovician in order to provide a tool that can be used for future chemostratigraphic correlations. The data correlate well with results from South China, and several major global δ13C excursions such as the MDICE (Dw2/3), SAICE (Sa2), GICE (Ka1), and Whitewater excursion (Ka4) are documented for the first time from the Tarim Basin. Major sedimentary gaps are detected in the lower Floian between the Penglaiba and Yinshan formations, in the upper Darriwilian to lower Sandbian between the Dawangou and Saergan (or Kanling) formations, and in the latest Sandbian between the Kanling and Qilang formations as well as between the Tumuxiuke and Lianglitag formations. Three scenarios for the depositional history of the late Darriwilian to early Sandbian Saergan Formation, which represents an important hydrocarbon source rock in the Tarim Basin, are discussed with respect to their bio- and chemostratigraphic implications. The mid-upper Ordovician rocks recording high δ13C values have been deposited during transgressive or highstand intervals, whereas the regressive intervals are mostly missing. This results in a stacking of several positive excursions, and thus chemostratigraphic correlation without biostratigraphic control might produce misleading results, especially for shallow-water carbonates. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/68327
Appears in Collections: 过去全球变化的重建
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作者单位: Nanjing Institute of Geology and Palaeontology, Key Laboratory of Economic Stratigraphy and Palaeogeography, Nanjing, China; GeoZentrum Nordbayern, Universität Erlangen-Nürnberg, Fachgruppe Paläoumwelt, Loewenichstr. 28, Erlangen, Germany
Recommended Citation:
Zhang Y.,Munnecke A.. Ordovician stable carbon isotope stratigraphy in the Tarim Basin, NW China[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016-01-01,458