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Field, hand specimen, and microscopic investigations alongside X‐ray diffraction analyses revealed four types of hydrothermal alteration (Type‐A, ‐B, ‐C, and ‐D) based on the mode of occurrence of altered rocks and alteration mineral assemblage at Hakusui‐kyo and Horai‐kyo along the Arima‐Takatsuki Tectonic Line (ATTL) in western Japan. Type‐A alteration locally occurred as gray alteration halos with...
In this study, we surveyed the uranium (U) load in stream water within a humid forest in Japan, and clarified the fact that changes in U load depended on the amount of sediment accumulated behind dams constructed along the stream. To elucidate the relationship between U and the accumulated sediments, we conducted U sorption experiments in the laboratory using stream water and sampled sediments. The...
In this study, we investigated the natural attenuation of the uranium (U) load in the surface water within a humid forest in Japan. Surface water and sediments that had accumulated behind dams in the area were investigated in terms of their mineralogy and chemistry. The chemistry of the surface water was analyzed by field measurements of pH, dissolved oxygen (DO) concentration, and electrical conductivity...
The objective of this study was to examine the relationship between the amounts and chemical compositions of total amorphous materials and elements in the soil. Total amorphous materials in a brown forest soil were quantified by an X-ray powder diffraction method, chemical compositions of total amorphous materials were determined by a balance sheet method, and arsenic (As), antimony (Sb), and bismuth...
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