A giant underwater stalactite from the Blue Hole, Belize, revisited: a complex history of carbonate accretion under changing meteoric and marine conditions

重温伯利兹蓝洞的巨型水下钟乳石：不断变化的大气和海洋条件下碳酸盐吸积的复杂历史

• 批准号: 325084568
• 负责人: Professor Dr. Eberhard Gischler
• 金额: --
• 依托单位: GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2016
• 资助国家: 德国
• 起止时间: 2015-12-31 至 2019-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/325084568?language=en
• 关键词: giant; underwater; stalactite; Blue; Hole

The aim of this project is to investigate a unique sample of a submarine stalactite, collected by Jacques Cousteau and the crew of the RV CALYPSO in the Blue Hole of Lighthouse Reef, Belize, in 1970. The sample offers the opportunity to study meteoric and especially extensive marine carbonate formation in a special environment and to obtain a highly resolved climate achive for a time window during the early Holocene. Preliminary studies have shown that the late Pleistocene-Holocene speleothem consists of a meteoric core, thick crust of marine aragonite cement, and a thin outher biogenic crust. The planned project has three objectives including (1) to reconstruct the history and conditions of formation of the stalactite in detail, (2) to assess the influence of organisms (microbes) in carbonate formation, and (3) to test the usability of the speleothem as postglacial climate archive. To achieve this, petrography and composition, precise U-series ages, geochemical signatures (d18O, d13C, Sr/Ca), as well as lipid biomarkers and CAS isotopes shall be analyzed systematically.

这个项目的目的是调查一个独特的海底钟乳石样本，由雅克·库斯托和CALYPSO号考察船的船员于1970年在伯利兹灯塔礁的蓝洞采集。该样品提供了一个机会，以研究大气，特别是广泛的海洋碳酸盐岩形成在一个特殊的环境，并获得一个高分辨率的气候acrive的时间窗口在全新世早期。初步研究表明，晚更新世-全新世洞穴沉积物由一个陨石核、一个厚的海相文石胶结物壳和一个薄的外部生物壳组成。计划中的项目有三个目标，包括（1）详细重建钟乳石形成的历史和条件，（2）评估碳酸盐形成中生物（微生物）的影响，以及（3）测试洞穴沉积物作为冰后期气候档案的可用性。为此，应系统分析岩相学和成分、精确的铀系年龄、地球化学特征（d18 O、d13 C、Sr/Ca）以及脂类生物标志物和CAS同位素。

项目成果

A Giant Underwater, Encrusted Stalactite from the Blue Hole, Lighthouse Reef, Belize, Revisited: a Complex History of Biologically Induced Carbonate Accretion Under Changing Meteoric and Marine Conditions

重温伯利兹灯塔礁蓝洞的巨大水下结壳钟乳石：在不断变化的气象和海洋条件下生物引起的碳酸盐增生的复杂历史

• DOI: 10.2110/jsr.2017.72
• 发表时间: 2017
• 期刊: Journal of Sedimentary Research
• 影响因子: 2
• 作者: Gischler;Birgel;Brunner;Eisenhauer;Peckmann
• 通讯作者: Peckmann