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The brackish-water bivalve Waagenoperna from the Lower Jurassic Badaowan Formation of the Junggar Basin and its palaeoenvironmental and palaeogeographic significance

ISSN号：0469-5097
期刊名称：《南京大学学报：自然科学版》
时间：0
分类：P531[天文地球—古生物学与地层学;天文地球—地质学] TE122.3[石油与天然气工程—油气勘探]
作者机构：[1]State Key Laboratory of Palaeobiology and Stratigraphy, Nanjing Institute of Geology and Palaeontology, Chinese Academy of Sciences, Nanjing 210008, China
相关基金：Acknowledgements This work has been supported by the Bureau of Geological Sut-vey of China （1212011120116）, the National Natural Science Foundation of China （40632010, 41102005, 91114201, and J0930006）, and the National Basic Research Program of China （2012CB821906）. We thank Prof. Xiaoqiao Wan, and another anonymous reviewer for reviewing and improving the paper.

作者： Yanhong Pan[1] Jingeng Sha[1] Yaqiong[1] Wang Xiaolin[1] Zhang Xiaogang[1] Yao Bo[1] Peng Xin Rao[1]

关键词：准噶尔盆地南缘, 古环境信息, 八道湾组, 下侏罗统, 半咸水, 双壳类, 古地理, 个体生态学, Brackish-water bivalve Waagenoperna Transgression Sinemurian Junggar Basin

中文摘要：

略有盐味水的瓣鳃类 WaagenopernaTokuyama， 1959 在四个地区从更低的侏罗记 Badaowan 形成被报导，沿着南部的边缘和 Junggar 盆的西方的边缘。在这块地里记录的 Taphonomic 特征显示它发生在本土或 parautochthonous 集合。Waagenoperna 的个体生态学因此在区域的 palaeoenvironment 上产出信息。到海洋、略有盐味水的背景的 Waagenoperna 的限制建议海水曾经在 Sinemurian 期间到达了这些区域。这份报纸讨论 palaeogeographic 含意并且从西方建议海水的 ingression 到 Junggar 盆的西方、南部的部分。另外，在 Junggar 盆从 Haojiagou 节收集的二 Waagenoperna 种分类地被记录。

英文摘要：

The brackish-water bivalve Waagenoperna Tokuyama, 1959 is reported from the Lower Jurassic Badaowan Formation at four localities, along the southern margin and western margin of the Junggar Basin. Taphonomic features recorded in the field indicate that it occurs in autochthonous or parautochthonous assemblages. The autecology of Waagenoperna therefore yields information on the palaeoenvironment of the area. The restriction of Waagenoperna to marine and brackish-water settings suggests that the sea water once reached these areas during the Sinemurian. This paper discusses the palaeogeographic implications and suggests an ingression of the sea water from the west to the western and southern part of the Junggar Basin. Additionally, the two Waagenoperna species collected from the Haojiagou section in the Junggar Basin are taxonomically documented.