Ordovician stable carbon isotope stratigraphy in the Tarim Basin, NW China
Zhang Y, Munnecke A (2016)
Publication Language: English
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2016
Journal
Publisher: Elsevier B.V.
Book Volume: 458
Pages Range: 154-175
DOI: 10.1016/j.palaeo.2015.09.001
Open Access Link: http://www.sciencedirect.com/science/article/pii/S003101821500485X
Abstract
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 δC 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 δC 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.
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APA:
Zhang, Y., & Munnecke, A. (2016). Ordovician stable carbon isotope stratigraphy in the Tarim Basin, NW China. Palaeogeography, Palaeoclimatology, Palaeoecology, 458, 154-175. https://doi.org/10.1016/j.palaeo.2015.09.001
MLA:
Zhang, Yuandong, and Axel Munnecke. "Ordovician stable carbon isotope stratigraphy in the Tarim Basin, NW China." Palaeogeography, Palaeoclimatology, Palaeoecology 458 (2016): 154-175.
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