| Popis: |
The biogenic component of the rain of particles to the sea floor, consisting of organic matter, calcium carbonate, and biogenic silica, is efficiently recycled at the surface of marine sediments. The reactions these materials undergo affect the Earth's surface geochemical cycles on both short and long timescales. Further, they alter the composition of the particulate flux, so that their effects must be considered in the interpretation of the sedimentary record. The reactions of biogenic materials in sediments leave strong signals in sedimentary pore waters. In this article, we discuss the methods of interpretation of concentration versus depth profiles of pore water solutes and the conclusions that can be drawn from them regarding early diagenetic reactions. |
