ORGANIC-CARBON ACCUMULATION IN BANNOCK BASIN - EVALUATING THE ROLE OF PRODUCTIVITY IN THE FORMATION OF EASTERN MEDITERRANEAN SAPROPELS
ORGANIC-CARBON ACCUMULATION IN BANNOCK BASIN - EVALUATING THE ROLE OF PRODUCTIVITY IN THE FORMATION OF EASTERN MEDITERRANEAN SAPROPELS
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DOI：
10.1016/0025-3227(92)90032-d
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发表时间：
1992-01-01
期刊：
影响因子：
2.9
通讯作者：
THUNELL, RC
中科院分区：
文献类型：
--
作者：
HOWELL, MW;THUNELL, RC
从班诺克盆地，在地中海东部的高盐缺氧盆地，三个沉积物岩心进行了研究，以评估生产力的有机碳积累和腐泥形成在这一地区的重要性。有机碳积累率测定两个核心从缺氧，高盐度区和一个核心从这个盆地的氧化部分。缺氧区表层沉积物由于保存较好，有机碳积累速率高出一个数量级。经验得出的保存因子，它允许计算的古生产力在最近的腐泥（S1）的沉积过程中，表明生产力增加了一个数量级在S1的形成。我们的结论是，生产力的提高，加上密度分层和环流逆转在地中海东部，这一起导致腐泥形成。
Three sediment cores from Bannock Basin, a hypersaline anoxic basin in the eastern Mediterranean, have been studied to evaluate the importance of productivity on organic carbon accumulation and sapropel formation in this region. Organic carbon accumulation rates were determined for two cores from within the anoxic, hypersaline zone and for one core from the oxygenated portion of this basin. Organic carbon accumulation rates are higher by an order of magnitude in the surficial sediments of the anoxic zone due to better preservation. An empirically derived preservation factor, which allows calculation of paleoproductivity during the deposition of the most recent sapropel (S1), indicates that productivity increased by an order of magnitude during the formation of S1. We conclude that increased productivity was coupled with a density stratification and a circulation reversal in the eastern Mediterranean, which together led to sapropel formation.