نتایج جستجو برای: diagenesis
تعداد نتایج: 1443 فیلتر نتایج به سال:
There is an amazing array of concretions throughout the sedimentary record Earth, and now iron oxide examples (“blueberries”) recognized in several regions Mars. Two questions address current state knowledge on nodular cemented mineral masses as well coloration patterns. Collectively authigenic cements patterns chronicle past diagenetic conditions, particularly clastic rocks.
Here we report multiple parameters used to describe the diagenetic state of sediments, including total hydrolysable amino acid (THAA), amino acid enantiomer, chlorin (CI) and amino acid degradation (DI, RI) indices, along a transect between the Upper St. Lawrence Estuary and the Gulf of St. Lawrence, Canada. The study area is characterized by gradients in water oxygen concentration, water depth...
Cone-in-cone (CIC) and beef (BF) carbonate lenses ornament detachment zone faults underlying Triassic growth basins on Edgeøya. Field relationships place CIC and BF growth as during early diagenesis and a transition from hydroplastic to a later brittle-style of faulting that is marked by coarser calcite veining. Deformation is constrained to have occurred at<300 m depth. Multiple models exist f...
Phosphorus retention in sediments has been estimated for three basins in Lake Simcoe, a mesotrophic lake in Ontario, Canada. Total phosphorous (TP) fractionation was used to examine the concentration of phosphorus (P) binding forms in the sediments of Cook's Bay, Kempenfelt Bay, and the Main Basin. The extended sequential extractions allowed us to differentiate between organic-, inorganic-, car...
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