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首页> 外文期刊>Journal of quaternary science: JQS >Tephra redeposition and mixing in a Late-glacial hillside basin determined by fusion of clustering analyses of glass-shard geochemistry
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Tephra redeposition and mixing in a Late-glacial hillside basin determined by fusion of clustering analyses of glass-shard geochemistry

机译：玻璃碎片地球化学聚类分析的融合确定了晚冰川山坡盆地中的Tephra再沉积和混合

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摘要

Two discontinuous tephra layers were discovered at Burney Spring Mountain, northern California. Stratigraphic relationships suggest that they are two distinct primary fall tephras. The geochemistries of these tephras from electron probe microanalysis were compared with those of known layers found in the area to test for potential correlations, using clustering analysis on geochemistry. In most cases, geochemical data from a tephra layer can be assigned to a single cluster, but in some cases the analyses are spread over several clusters. This spreading is a direct result of mixing and reworking of several tephra layers. The mixing, in turn, appears to be related to the influence of wind in a marshy environment.
机译：在加利福尼亚北部的伯尼斯普林山发现了两个不连续的提夫拉层。地层关系表明它们是两个截然不同的主要秋季特弗拉斯。使用地球化学的聚类分析，通过电子探针显微分析将这些提弗拉的地球化学与该地区发现的已知层的地球化学进行比较，以测试潜在的相关性。在大多数情况下，来自特非拉层的地球化学数据可以分配给单个群集，但是在某些情况下，分析分散在多个群集中。这种铺展是几个蒂法拉层混合和返工的直接结果。反过来，混合似乎与在潮湿的环境中风的影响有关。

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