Increased fluvial runoff terminated inorganic aragonite precipitation on the Northwest Shelf of Australia during the early Holocene
Increased fluvial runoff terminated inorganic aragonite precipitation on the Northwest Shelf of Australia during the early Holocene
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DOI：
10.1038/s41598-019-54981-7
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发表时间：
2019-12-04
影响因子：
4.6
通讯作者：
Bogus, Kara
中科院分区：
文献类型：
--
作者：
Hallenberger, Maximilian;Reuning, Lars;Bogus, Kara
霰石的无机沉淀是热带碳酸盐环境中的常见过程。在澳大利亚西北陆架（NWS），此类沉淀物在更新世晚期非常丰富，而当今的沉积物主要是方解石生物碎屑。这项研究对从 IODP 站点 U1461 上部 13 米取回的岩心数据进行了沉积学和地球化学分析，这些数据提供了近 15000 年的高分辨率沉积记录。 15 至 10.1 ka BP 形成的沉积物是文石质，具有小针状特征（
Inorganic precipitation of aragonite is a common process within tropical carbonate environments. Across the Northwest Shelf of Australia (NWS) such precipitates were abundant in the late Pleistocene, whereas present-day sedimentation is dominated by calcitic bioclasts. This study presents sedimentological and geochemical analyses of core data retrieved from the upper 13 meters of IODP Site U1461 that provide a high-resolution sedimentary record of the last similar to 15 thousand years. Sediments that formed from 15 to 10.1 ka BP are aragonitic and characterised by small needles (