Cycle Development and Diagenesis of a Large Late Triassic Carbonate Platform, Hungary
Cycle Development and Diagenesis of a Large Late Triassic Carbonate Platform, Hungary
批准号:
9105558
负责人:
James Read
金额:
$10.0万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1991
资助国家:
美国
项目状态:
已结题
起止时间:
1991-06-01 至 1993-11-30
中文摘要
对匈牙利晚三叠世旋回台地碳酸盐岩的岩心和露头剖面进行研究,以确定为什么有些旋回记录的是海侵(洛弗型)序列,而另一些旋回记录的是海退相序列。费舍尔曲线将被用来定义相对的、长期的(3级)海平面曲线,并将其与已公布的晚三叠世曲线进行比较。将使用频谱分析来检查周期截面,以确定是否发生任何主导周期,如果发生,可能的原因是什么。计算机模拟将模拟海平面低水位期间的相序、旋回叠加模式、可能的下沉速率、可能的海平面波动幅度和周期、可能的沉积速率范围和可能的旋回出现时间。将对序列的成岩作用进行研究,以确定高频和低频海平面波动与岩石保存的成岩记录的关系,以及众多旋回盖层不整合和晚中生代和新生代不整合的关系。这项工作将定义一个浅层碳酸盐台地的沉积成岩记录如何忠实地记录其海平面和构造历史。
英文摘要
Cores and outcrop sections of Late Triassic, cycle platform carbonates in Hungary will be studied to determine why some cycles record a transgressive (Lofer-type) succession, whereas other cycles record a regressive succession of facies. Fischer plots will be used to define relative, long-term (3rd order) sea level curves, which will be compared to published Late Triassic curves. Cyclic sections will be examined using spectral analysis to define if any dominant periodicities occur, and if so, what were likely causes. Computer modeling will simulate facies successions, cycle stacking patterns, possible subsidence rates, likely amplitude and periods of 3rd to 5th order sea level fluctuations, possible ranges of sedimentation rates, and likely emergence times of cycles during sea level lowstands. The diagenesis of the succession will be studied to determine the relationship, if any, of high and low frequency sea level fluctuations to the diagenetic record preserved the rocks, and the relationship of the numerous cycle-capping disconformities, and Late Mesozoic and Cenozoic unconformities. The work will define how faithfully a shallow carbonate platform's sedimentary diagenetic record records its sea level and tectonic history.
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依托单位:
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依托单位:
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批准号:--
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项目类别:--
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依托单位: