词汇 | detrital |
释义 | BETA Examples of detritaldetrital isn’t in the Cambridge Dictionary yet. You can help! Calcareous subarkose hosting at least two different groups of detrital grains with respect to clast morphology. 53 isotope systematics and the provenance of detrital zircons of these different terrane assemblages, as they display distinct differences. The absence of severe rounding in this group of detrital zircons suggests a proximal source area. All of the analysed crystals in this sample are detrital with varying provenance ages. This is shown by the fact that the detrital ter rigenous influx was equal during times of more or less pure pelagic carbonate deposition. The high nutritional quality of the detrital organic matter in our study stream may result from grazing by tadpoles which enhances nitrogen fluxes. This assumption seems to be correct for the carbonate detritus, but the detrital blue amphiboles in the terrigenous sandstones indicate an internal source. All the samples examined in this work contained detrital clays in different proportions, resulting ultimately from basement rock alteration. The larger modelled upper continental crust component is also consistent with the relative abundance of detrital mica of possible extra-basinal origin. The siltstones commonly contain detrital white mica flakes that are generally lacking in the sandstones, and are possibly of distal continental origin. We found that the biomass of epiphytes and their associated detrital matter in this plot was 3360 kg ha-1. Interpreting provenance relations from detrital modes of sandstones. The diagonal lines show the theoretical younger limit for detrital mineral ages. Unless the grains are both large and old, it is generally not possible to undertake laser step-heating on individual detrital grains. Shallow-water mats were ripped up and distributed as detrital matter by waves and currents to surrounding environments. These grains are in samples from the tops of beds and may be detrital in origin. We consider the older ages to represent the youngest detrital ages for the unit and the younger ages to represent low-grade alteration of the unit. |
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