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首页> 外文期刊>Journal of Asian earth sciences >Sea-level, monsoonal, and anthropogenic impacts on the millennial-scale variability of siliciclastic sediment input into the western Philippine sea since 27 ka
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Sea-level, monsoonal, and anthropogenic impacts on the millennial-scale variability of siliciclastic sediment input into the western Philippine sea since 27 ka

机译：自27 ka以来，海平面，季风和人为影响对输入到菲律宾西部海的硅质碎屑沉积物千年尺度变化的影响

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摘要

Multiproxy records from Core MD06-3054 in the western Philippine Sea and published results from the nearby Core MD06-3052, which are both located at the northern margin of the Western Pacific Warm Pool (WPWP), provide precise reconstructions and evidence for the potential controls on continental erosion and weathering intensities in Luzon. These data also constrain sediment source-to-sink processes in the sea since 27 ka at the millennial scale. We demonstrate that the siliciclastic fraction is derived from Luzon volcanic rocks and eolian dust from mainland Asia. Stronger physical erosion and chemical weathering generally occurred during the last glaciation, Heinrich Event 1, the Younger Dryas, and the period from 10.3 to 11.3 ka. In contrast, the Bolling-Allerod was characterized by weaker physical erosion and chemical weathering. During the last glaciation, Heinrich Event 1, and the Younger Dryas, the lower sea level led to enhanced erosion and weathering of the exposed shelf sediments. In contrast, the weaker physical erosion and chemical weathering that occurred during the Balling-Allerod and the Holocene, except after 2.1 ka, are closely correlated with the higher sea level. The stronger physical erosion and chemical weathering at 10.3-11.3 ka may be derived from the reworking of older sediments during the time of a strengthening summer monsoon. Furthermore, enhanced human activity since 2.1 ka has become the dominant control on erosion in Luzon. Rapid weathering changes in the WPWP during the last deglaciation highlight the high variability in local controls at low latitudes during these periods and the potential influence of controls at high latitudes.
机译：菲律宾西部海域MD06-3054岩心的多代理记录以及附近MD06-3052岩心的已发布结果（均位于西太平洋暖池（WPWP）的北边缘），为潜在的控制提供了精确的重建和证据吕宋岛的大陆侵蚀和风化强度。这些数据还限制了千禧年以来27 ka以来海中沉积物从源到汇的过程。我们证明硅质碎屑岩成分来自亚洲大陆的吕宋火山岩和风尘。通常在最后一次冰期，Heinrich事件1，年轻的树蛙以及10.3至11.3 ka期间发生了更强的物理侵蚀和化学风化。相反，Bolling-Allerod的特征在于较弱的物理侵蚀和化学风化作用。在最后一次冰期，Heinrich事件1和Younger Dryas中，较低的海平面导致裸露的架子沉积物的侵蚀和风化加剧。相反，除了在2.1 ka之后，在Balling-Allerod和全新世期间发生的较弱的物理侵蚀和化学风化与较高的海平面密切相关。 10.3-11.3 ka时更强的物理侵蚀和化学风化可能是由于夏季季风增强期间较旧的沉积物的返修而产生的。此外，自2.1 ka开始，人类活动的增强已成为吕宋岛侵蚀的主要控制因素。末次冰期期间WPWP的快速风化变化突显了这些时期低纬度地方控制的高度可变性以及高纬度控制的潜在影响。

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  • 来源
    《Journal of Asian earth sciences》 |2019年第15期|250-262|共13页
  • 作者

    Xu Zhaokai; Li Tiegang; Clift Peter D.; Wan Shiming; Lim Dhongil; Chang Fengming; Sun Rongtao;

  • 作者单位

    Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China|Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China|CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China;

    Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China|SOA, Inst Oceanog 1, Key Lab Marine Sedimentol & Environm Geol, Qingdao 266061, Shandong, Peoples R China|Univ Chinese Acad Sci, Beijing 100049, Peoples R China;

    Louisiana State Univ, Dept Geol & Geophys, Baton Rouge, LA 70803 USA;

    Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China|Chinese Acad Sci, Ctr Ocean Mega Sci, Qingdao 266071, Shandong, Peoples R China|CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Shaanxi, Peoples R China;

    Korea Inst Ocean Sci & Technol, South Sea Res Inst, Geoje 53201, South Korea;

    Chinese Acad Sci, Inst Oceanol, CAS Key Lab Marine Geol & Environm, Qingdao 266071, Shandong, Peoples R China|Qingdao Natl Lab Marine Sci & Technol, Lab Marine Geol, Qingdao 266061, Shandong, Peoples R China;

    Shandong Univ Technol, Sch Resources & Environm Engn, Zibo 255000, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    Chemical weathering; Physical erosion; Sea level; East Asian summer monsoon; Anthropogenic activity; Luzon;

    机译：化学风化;物理侵蚀;海平面;东亚夏季风;人为活动;吕宋;

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