Modern sediment facies and dynamics of the Dry Tortugas, south Florida, USA: an isolated carbonate ramp

美国佛罗里达州南部干龟岛的现代沉积相和动力学:孤立的碳酸盐坡道

基本信息

  • 批准号:
    252336294
  • 负责人:
  • 金额:
    --
  • 依托单位:
  • 依托单位国家:
    德国
  • 项目类别:
    Research Grants
  • 财政年份:
    2014
  • 资助国家:
    德国
  • 起止时间:
    2013-12-31 至 2016-12-31
  • 项目状态:
    已结题

项目摘要

The Dry Tortugas are a 250 km2 remote carbonate shoal area with coral reefs and islands located at the southwestern boundary of the Florida shelf. The Tortugas platform is unique in that it may be classified as an isolated carbonate ramp, lacking continuous marginal reefs and surrounding deep water. It is planned to collect ca. 150 sediment samples along five east-west traverses across the platform, and to perform textural, compositional, and taphonomic analyses. This project has three objectives. (1) The compilation a of high-resolution facies map of the Dry Tortugas isolated ramp based on the quantitative analysis of sediment composition and texture, and bottom observations. (2) The estimation of spatial variability in taphonomic and early diagenetic signatures of sediment particles such as abrasion, fragmentation, boring, recrystallization, cementation, and dissolution. (3) The comparison of sediment composition and texture with previous datasets of 1908-15 (Thorp 1936) and 1967-69 (Jindrich 1972; Multer unpubl.) will open the unique opportunity to record temporal variation in sediment distribution over a century. The influence of biotic changes in carbonate-producing organisms and physical disturbances (e.g., major storms; cold events) may be evaluated. Preliminary facies maps put together by the applicant based on the previous datasets result in a mosaic of facies rather than larger, continuous facies areas. This is presumably a consequence of the unique, ramp-like geomorphology of the Tortugas lacking a continuous platform margin with sand aprons, steep outer flanks, and a deep platform interior, in combination with high local variability in carbonate prodution.
干托图加斯是一个250平方公里的偏远碳酸盐浅滩区,位于佛罗里达大陆架的西南边界,有珊瑚礁和岛屿。Tortugas平台的独特之处在于,它可能被归类为一个孤立的碳酸盐斜坡,缺乏连续的边缘珊瑚礁和周围的深水。该项目计划沿平台东西向的5条通道收集约150份沉积物样本,并进行结构、成分和地貌学分析。这个项目有三个目标。(1)在定量分析沉积物组成和质地的基础上,结合海底观测,绘制了干托尔图加斯孤立斜坡高分辨率相图。(2)沉积颗粒磨损、破碎、钻孔、再结晶、胶结和溶蚀等埋藏学和早期成岩特征的空间变异性估算。(3)将沉积物组成和质地与之前的1908-15年(Thorp 1936)和1967-69年(Jindrich 1972; Multer unpubl.)数据集进行比较,将为记录一个世纪以来沉积物分布的时间变化提供独特的机会。可以评估产生碳酸盐的生物变化和物理扰动(如大风暴、寒冷事件)的影响。开发商根据之前的数据集整理出初步的相图,得到的是相的马赛克图,而不是更大的连续相区。这可能是由于托图加斯独特的坡道状地貌,缺乏带砂圈的连续台地边缘、陡峭的外侧翼和深台地内部,再加上当地碳酸盐产量的高度变化。

项目成果

期刊论文数量(1)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
Sediments of the Dry Tortugas, south Florida, USA: Facies distribution on a ramp-like isolated carbonate platform
  • DOI:
    10.1016/j.sedgeo.2017.02.004
  • 发表时间:
    2017-04-15
  • 期刊:
  • 影响因子:
    2.8
  • 作者:
    Gischler, Eberhard;Isaack, Anja;Hudson, J. Harold
  • 通讯作者:
    Hudson, J. Harold
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Professor Dr. Eberhard Gischler其他文献

Professor Dr. Eberhard Gischler的其他文献

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{{ truncateString('Professor Dr. Eberhard Gischler', 18)}}的其他基金

Accretion patterns of Belize barrier and atoll reefs: an archive of environmental change during the Holocene
伯利兹堡礁和环礁的增生模式:全新世环境变化档案
  • 批准号:
    461264545
  • 财政年份:
    2020
  • 资助金额:
    --
  • 项目类别:
    Research Grants
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
  • 财政年份:
    2016
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Holocene development of reefs and lagoons of Bora Bora, Darwin's type barrier reef (French Polynesia): the influence of sea level, antecedent topography, and subsidence
达尔文型堡礁(法属波利尼西亚)波拉波拉岛珊瑚礁和泻湖的全新世发育:海平面、先前地形和沉降的影响
  • 批准号:
    235514932
  • 财政年份:
    2013
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Coastal lagoons as archives of event deposits, Belize, Caribbean Sea
作为事件沉积档案的沿海泻湖,伯利兹,加勒比海
  • 批准号:
    181603219
  • 财政年份:
    2010
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Atoll lagoons as archives of environmental change: tsunami deposits, reef and island development, and sea level in the Maldives, Indian Ocean
环礁泻湖作为环境变化的档案:海啸沉积物、珊瑚礁和岛屿的发展以及马尔代夫和印度洋的海平面
  • 批准号:
    129863134
  • 财政年份:
    2009
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Seismic survey of the Blue Hole, Belize: a pre-study for ICDP-drilling
伯利兹蓝洞地震勘探:ICDP 钻探预研究
  • 批准号:
    59921461
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Infrastructure Priority Programmes
Pleistocene development and facies of southern Belize shelf and barrier reef
伯利兹南部陆架和堡礁更新世发育及相
  • 批准号:
    50152196
  • 财政年份:
    2007
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Late Quaternary development, architecture, and paleoecology of Rasdhoo Atoll, Maldives, Indian Ocean
印度洋马尔代夫拉斯杜环礁的晚第四纪发展、建筑和古生态
  • 批准号:
    22831428
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Holozäne Stromatolithe in Süßwasserlagunen, Yucatan Halbinsel, SE-Mexico
墨西哥东南部尤卡坦半岛淡水泻湖中的全新世叠层石
  • 批准号:
    24390929
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Research Grants
Historical climate variation in the Maldives, Indian Ocean, based on proxy data from Scleractinian coral skeletons
马尔代夫和印度洋的历史气候变化,基于石珊瑚骨骼的代理数据
  • 批准号:
    22831518
  • 财政年份:
    2006
  • 资助金额:
    --
  • 项目类别:
    Research Grants

相似国自然基金

Toward a general theory of intermittent aeolian and fluvial nonsuspended sediment transport
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