Recent sedimentary development of Tampa Bay, Florida: A microtidal estuary incised into tertiary platform carbonates
Recent sedimentary development of Tampa Bay, Florida: A microtidal estuary incised into tertiary platform carbonates
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佛罗里达州坦帕湾的最新沉积发育：切入第三纪台地碳酸盐的微潮河口
DOI：
10.2307/1352838
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发表时间：
1998
期刊：
影响因子：
--
通讯作者：
L. Doyle
中科院分区：
文献类型：
--
作者：
G. Brooks;L. Doyle
坦帕湾是一个大的，小潮，碎屑填充的河口切入第三纪碳酸盐地层，是佛罗里达西海岸最大的河口。在坦帕湾共采集了250个表层沉积物样品和17个岩心，以确定控制近期填充和现代沉积物分布的模式和控制因素，并根据当前的河口沉积和发展模型来检查结果。坦帕湾的表层沉积物由三种相类型组成，每种相类型都发生在一个不同的区域：现代陆源碎屑泥发生在海湾上部和海湾周边;残留的，再造的河流，富含石英的砂占据中部海湾的开放部分;现代富含碳酸盐的，海洋衍生的砂和砾石占据下部海湾。控制沉积物分布的因素包括：沉积物来源和供应率;水深，这是一个功能的前期地形;和风力产生的波浪，禁止现代积累在浅中湾的扬场效应。这些因素也发挥了重要作用，在最近的填充历史的坦帕湾，这在全新世海平面上升的四个阶段的进展。最近开发的河口沉积模型主要是基于陆源碎屑沉积模式和充填历史是海洋和河流过程的相对贡献的结果的中潮到大潮河口。坦帕湾的不同之处在于，它最初被切割成碳酸盐地层，河流或海洋过程都没有被解释为现代沉积物分布的主要贡献者。因此，坦帕湾提供了一个不寻常的河口类型的例子，这应该在未来的建模工作中考虑。* 直接支持 * A01 BY 083 00004
Tampa Bay, a large, microtidal, clastic-filled estuary incised into Tertiary carbonate strata, is the largest estuary on Florida’s west coast. A total of 250 surface sediment samples and 17 cores were collected in Tampa Bay in order to determine the patterns and controlling factors governing the recent infilling and modern sediment distribution, and to examine the results in terms of current models of estuarine sedimentation and development. Surficial sediments in Tampa Bay consist of three facies types, each occurring in a distinct zone: modern terrigenous clastic muds occurring in the upper bay and around the bay periphery; relict, reworked-fluvial, quartz-rich sands occupying the open portion of the middle bay; and modern carbonate-rich, marine-derived sands and gravels occupying the lower bay. Factors controlling sediment distribution include: sediment source and supply rate; bathymetry, which is a function of the antecedent topography; and the winnowing effect of wind-generated waves that prohibits modern accumulation in the shallow middle bay. These factors also play a major role in the recent infilling history of Tampa Bay, which has progressed in four stages during the Holocene sea-level rise. Recently developed models of estuarine sedimentation are based primarily on mesotidal to macrotidal estuaries in terrigenous clastic settings in which sedimentation patterns and infilling history are a result of the relative contribution of marine and fluvial processes. Tampa Bay differs in that it was originally incised into carbonate strata, and neither fluvial or marine processes are interpreted to be major contributors to modern sediment distribution. Tampa Bay, therefore, provides an example of an unusual estuary type, which should be considered in future modeling efforts. *** DIRECT SUPPORT *** A01BY083 00004