Sea Level Record of the Last Glacial Period 19,000 to 29,000 years BP
Sea Level Record of the Last Glacial Period 19,000 to 29,000 years BP
批准号:
0550900
负责人:
Steven Goldstein
金额:
$0.0万
依托单位:
依托单位国家:
美国
项目类别:
Standard Grant
财政年份:
2006
资助国家:
美国
项目状态:
已结题
起止时间:
2006-11-15 至 2008-10-31
中文摘要
这项研究将允许PI继续从巴巴多斯寻找珊瑚物种A.Palmata,以澄清海平面曲线的各个方面和相关的古气候记录。PI将钻探和恢复在最后一次冰川高峰期海平面低水位期间生长的珊瑚化石。他已经确定了一个溺水的礁石复合体,根据它的水深,它对应于低水位,因此代表着低水位期间的珊瑚礁生长。测定珊瑚礁复合体中珊瑚的年代是确定这一点的唯一方法,但如果成功,这将是一个异常重要的数据集。该杂岩上的珊瑚礁尖顶可能提供了大冰川低水位后海平面上升的记录,最高可达约90米水深,从而填补了关于确定低水位何时结束、是否突然结束以及随后的海平面历史到融水脉冲1A时的重要细节。PI将使用从RV Knorr部署的绳索取芯装置来收集珊瑚骨骼材料的核心。他将对收集的珊瑚材料进行初步的U系列测年,以确定收集的样本的年龄范围。更广泛的影响包括在真正的大冰盖期间准确重建海平面,以及支持本科生/研究生研究培训计划。
英文摘要
0550900FairbanksAbstractThe study will allow the PI to continue his search for coral species A. palmata from Barbados to clarify various aspects of the sea level curve and associated paleoclimate records. The PI will drill and recover fossil corals that grew during the sea-level lowstand of the Last Glacial Maximum. He has identified a drowned reef complex that, based on its water depth would correspond to the lowstand, and thus represent reef growth during lowstand. Dating corals from this reef complex is the only way to ascertain this but if successful it will represent an exceptionally important dataset. Reef pinnacles on the complex may provide a record of sea level rise following the LGM lowstand up to ~90 m water depth, and thus fill in an important detail with respect to determining when the lowstand ended, whether it ended abruptly or not, and subsequent sea-level history up to the time of meltwater pulse 1A. The PI will use a wireline coring device deployed from the RV Knorr to collect cores of coral skeletal material. He will do initial U-series dating of collected coral material to determine the range of ages of the samples collected. The broader impacts include an accurate reconstruction of sea-level during the true LGM and support of an undergraduate/graduate research training program.
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依托单位:
国内基金
海外基金
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