Early to Middle Holocene sea level fluctuation, coastal progradation and the Neolithic occupation in the Yaojiang Valley of southern Hangzhou Bay, Eastern China
Early to Middle Holocene sea level fluctuation, coastal progradation and the Neolithic occupation in the Yaojiang Valley of southern Hangzhou Bay, Eastern China
复制标题
全新世早中期海平面波动、海岸侵蚀与中国东部杭州湾南部姚江流域新石器时代的占领
DOI：
10.1016/j.quascirev.2018.04.010
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发表时间：
2018-06-01
影响因子：
4
通讯作者：
Chen, Zhongyuan
中科院分区：
文献类型：
--
作者：
Liu, Yan;Sun, Qianli;Chen, Zhongyuan
杭州湾南部的瑶江流域（YJV）是著名的河姆渡文化（HC）的发源地，是中国东部新石器文明的代表之一。为了探索自然环境对HC轨迹的影响程度，研究人员首次利用全新世三维地层进行了详细的研究，并获得了一系列新的放射性碳定年岩心。结果表明：YJV早全新世地区相对海平面迅速上升，在7900 cal yr BP左右达到最大淹没面，之后在7900-7600 cal yr BP左右保持稳定。在此基础上，先由海侵作用形成向内陆延伸的河口，再由退积作用转化为冲积-海岸平原。冲积平原起源于丘陵地带，在约7600 calyr BP海平面稳定后向山谷中心扩展。伴随着这些自然环境的变化，最早的采集者到达山谷的时间不晚于大约公元前7000年。他们从事水稻种植，并在大约公元前7000-5000年的时间里培育了大约两千年，因为沿海退化开发了更多的土地。HC的兴起和发展与全新世早期中期YJV地区海平面引起的景观变化密切相关，但大约5000 calyr BP之后HC人的神秘出走仍然存在争议，可能与这样一个低洼沿海平原的快速涝灾和环境恶化以及相关的社会原因有关。(C) 2018 Elsevier Ltd.版权所有。
The Yaojiang Valley (YJV) of southern Hangzhou Bay was the birthplace of the well-known Hemudu Culture (HC), one of the representatives of Neolithic civilization in eastern China. To explore the magnitude of natural environmental effects on the HC trajectory, the palaeo-embayment setting of the YJV was studied in detail for the first time in terms of 3D Holocene strata supported by a series of new radiocarbon-dated cores. The results indicated that the local relative sea level rose rapidly during the Early Holocene in the YJV, reached its maximum flooding surface ca. 7900 cal yr BP, and then remained stable ca. 7900-7600 cal yr BP. Thereupon, an estuary stretching inland was first formed by marine transgression, and then, it was transformed to an alluvial-coastal plain by regressive progradation. The alluvial plain was initiated in the foothills and then spread towards the valley centre after sea level stabilization ca. 7600 cal yr BP. Accompanying these natural environmental changes, the earliest arrivals of foragers in the valley occurred no later than ca. 7000 cal yr BP. They engaged in rice farming and fostered the HC for approximately two millennia from ca. 7000-5000 cal yr BP as more lands developed from coastal progradation. The rise and development of the HC are closely associated with the sea level induced landscape changes in the YJV in the Early-Middle Holocene, but the enigmatic exodus of the HC people after ca. 5000 cal yr BP is still contentious and possibly linked with the rapid waterlogging and deterioration of this setting in such a low-lying coastal plain as well as with associated social reasons. (C) 2018 Elsevier Ltd. All rights reserved.