词汇 | evaporite |
释义 | BETA Examples of evaporiteevaporite isn’t in the Cambridge Dictionary yet. You can help! This is particularly suggested by the succession of evaporite couplets, which are attributed to pulsating episodes of water table change. They are found in evaporite salt lakes and can be trapped in salt crystals during evaporation. As the evaporite basin was dissected, the deposits were at least temporarily kept above the water level and dissolution took place, forming small depressions. Both of these evaporite minerals have a high solubility and can be readily precipitated, and as such they are ideal candidates for laboratory experiments. During these episodes, evaporite precipitation in the study area occur red only within the sediment. Evaporites are classified as primary, secondary and tertiary, 'secondary' corresponding to diagenetic (including sabkha textures and mineralogies) and 'tertiary' to evaporites in the exhumation stage. In the third chapter, the environments and conditions of evaporite development are described. The distribution of evaporites in soils is driven primarily by water, but wind (aeolian) transport may also be important. There is nothing here (or anywhere else) on coal or evaporites, for example. The climate did not achieve conditions favourable for the precipitation of evaporites in the study area. The gypsarenite records periods when evaporite crystals were reworked. This is probably to be expected because it is the first time that so wide a spectrum of evaporite-related topics has been compiled. The crystals grown in this study are of compounds that form the evaporite minerals halite (sodium chloride) and epsomite (hydrated magnesium sulphate). The last two chapters deal with metals and evaporites, including clear and enigmatic relationships in normal to magmatic conditions. A saline pan/sabkha facies association is indicated by evaporite precipitation in a very shallow subaqueous environment that was inter rupted by periodic exposure. A first stage in sampling would involve planetary spectroscopic techniques capable of detecting hydrothermal deposits, carbonates and evaporites. Loss of near-surface waters resulted in evaporites in low-lying regions. Gypsum and evaporites such as halite and mirabilite are indicators of arid and semi-arid climates. Shallower areas of the pans and sur rounding flats were dominated by evaporite deposition. |
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