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首页> 外文期刊>Precambrian Research >Sedimentary sequence and evolutionary history of the Proterozoic basin at the southern margin of the North China Craton
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Sedimentary sequence and evolutionary history of the Proterozoic basin at the southern margin of the North China Craton

机译：北方克拉顿南部边缘沉积序列与进化史

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摘要

Aulacogen/Rift system deposits and tectonic-magmatic activities can be linked to the breakup of the Columbia supercontinent and have developed in the North China Craton (NCC). The Xiong'er Basin at the southern margin of the NCC consists of late Palaeoproterozoic-Neoproterozoic sedimentary strata and can be divided into three sedimentary sequences. Sedimentary Sequence I (1.83-1.75 Ga) consists of bimodal volcanic-sedimentary rocks of the Xiong'er Group with continental-marine facies and alluvial fan deposits of the Bingmagou Formation with local development. It represents the evolution of the intracontinental fault from initiation to decline. Sedimentary Sequence II (1.75-1.6 Ga) developed after the southern margin of the NCC entered a stable continental margin stage, is dominated by clastic rocks interbedded with local carbonate deposits, and fills the interior of the basin. As continuous transgression led to a transition in the sedimentary environment, sedimentary Sequence III (1.6-1.4 Ga) is dominated by carbonate strata that began to develop afterwards. This sequence is the caprock deposit in the Xiong'er Basin. Subsequently, tectonic uplift events occurred at the southern margin of the NCC, along with the start of exposure and denudation, which lasted for hundreds of millions of years. Moreover, abundant microbially induced sedimentary structures (MISS) with different morphological characteristics developed in clastic strata across different areas of the Xiong'er Basin. These structures effectively indicate sedimentary facies and their evolution, which facilitates the establishment of regional stratigraphic isochronous correlation and connection. For example, based on the time limit for the development of molar-tooth structures (MTS), the Hejiazhai Formation belongs to the Neoproterozoic strata, with a deposition time of 1.0-0.72 Ga. In conclusion, the study of the Precambrian sedimentary succession in the Xiong'er Basin, in response to the supercontinental breakup, can be useful in exploring the coupling mechanisms between various geological events.
机译：硫代唑啉代/裂缝系统沉积物和构造岩石活动可以与哥伦比亚超大伦的分手相关联，并在华北克拉顿（NCC）中发展。 NCC南部边缘的熊盆地由晚古典古代 - 新核沉积岩沉积地层组成，可分为三种沉积序列。沉积序列I（1.83-1.75 GA）由熊币的双峰火山沉积岩石组成，熊海军群，宾夕法尼亚湾地区的冲积风扇沉积物与当地发展。它代表了从启动下降的脑内故障的演变。在NCC的南部边缘进入稳定的大陆边缘阶段之后，沉积序列II（1.75-1.6 GA）由嵌入当地碳酸盐沉积物嵌入的碎屑岩，并填充盆地内部。由于连续的过渡导致沉积环境中的过渡，沉积序列III（1.6-1.4 GA）由开始发展的碳酸盐层主导。该序列是熊罐盆地的支架沉积物。随后，构造隆起事件发生在NCC的南部边缘，以及曝光和剥落的开始，持续数百万年。此外，丰富的微生物诱导的沉积结构（miss）具有不同形态特征的巨型曲率在熊池盆地的不同区域。这些结构有效地表明沉积相及其进化，这有助于建立区域地层同步相关性和连接。例如，基于摩尔牙齿结构（MTS）的开发的时间限制，Hejiazhai的形成属于NeoProteroZoic STRATA，沉积时间为1.0-0.72Ga。总之，研究预先的沉积连续Xiong'er盆地响应于超高度分解，可用于探索各种地质事件之间的耦合机制。

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