Geochemistry of Marine Sediments
Geochemistry of Marine Sediments
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DOI：
10.1029/2007eo470014
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发表时间：
2007-11
期刊：
影响因子：
--
通讯作者：
T. Bianchi
中科院分区：
文献类型：
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作者：
T. Bianchi
在地质时期内，地球表面的岩石上升到海平面以上，产生了一些物质，这些物质可以通过风化过程变成土壤和沉积物。随着时间的推移，一小部分沉积物被隔离在海洋盆地中，大部分沉积物储存在沿海边缘。火成岩、变质岩和沉积岩风化产生的沉积物主要通过世界河流系统输送到海洋。海洋沉积物中有机质的储存在很大程度上取决于早期成岩作用的量（改变沉积物的结构、质地和矿物学的过程，使其逐渐变成坚硬的岩石;早期成岩作用发生在沉积物的沉积或埋藏之后），其发生在上部沉积物中，这在很大程度上取决于有机碎屑输入的“质量”和沉积环境的氧化还原条件。
The uplift of rocks above sea level on the Earth's surface over geologic time produces material that can be altered into soils and sediments by weathering processes. Over time, a fraction of sediments are sequestered in ocean basins, with most of it stored in the coastal margin. Sediments produced from weathering of igneous, metamorphic, and sedimentary rocks are transported primarily to the oceans through the world's river systems. The storage of organic matter in marine sediments is largely dependent upon the amount of early diagenesis (processes that alter the structure, texture, and mineralogy of a sediment, turning it progressively into solid hard rock; early diagenesis occurs immediately after deposition or burial of the sediment) that occurs in the upper sediments, which is controlled largely by the “quality” of organic detrital inputs and redox conditions of the sedimentary environment.