Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Initialising ...
Yokoro, Yu*; Hanamuro, Takahiro; Nakashima, Kazuo*
Resource Geology, 63(4), p.384 - 393, 2013/10
Times Cited Count：8 Percentile：37.48(Geology)The Ohori ore deposit is one of the Cu-Pb-Zn deposits in the Green Tuff region, NE Japan. It consists of a skarn-type (Kaninomata) and a vein-type (Nakanomata) orebody. Carbon isotopic ratios of the skarn calcite are slightly lower than those of the Cretaceous skarn deposits in Japan, since the carbonaceous rock of the Kaninomata orebody originated by hydrothermal activity. Sulfur isotopic ratio of the Kaninomata and Nakanomata orebodies are mostly in a narrow range, the sulfur in both orebodies is thought to have the same origin.
Nakata, Masataka*; Sasao, Eiji; Komuro, Kosei*
Resource Geology, 63(4), p.404 - 411, 2013/10
Times Cited Count：0 Percentile：0.04(Geology)Various secondary uranium minerals yield in oxidized zone near surface. These minerals indicate retardation of uranium in oxidized zone. Calcium and magnesium-bearing sabugalite occurs as aggregations of yellowish platy crystals in veinlets or druses in conglomerate from the oxidized parts of the Tono uranium deposit, Central Japan. X-ray powder diffractometry of this mineral has reflections consistent with previous powder diffraction data of sabugalite. Chemical analysis reveals the chemical composition of the minerals. SEM-EDS mapping shows that the mineral is compositionally uniform with no micron-scale layering. Charge of cations including Ca and Mg in the cation-H
O layer is 1.98 being identical to that of autunite group minerals. This suggests that the charge balance in the cation-HO layer of the mineral could be made by the alkaline earth or alkaline elements rather than by hydrogen ions.
emission from active faults using compact sampling equipmentsShimada, Koji; Tanaka, Hidemi*; Saito, Tomohiko*
Resource Geology, 58(2), p.196 - 202, 2008/06
Times Cited Count：2 Percentile：15.8(Geology)To shorten the duration of higher concentration of hydrogen immediately after a fault-gas-monitoring installation (install effect), a downsized equipment using commercial sensor was arranged. The install effect, which obstacle to genuine gas emission from faults, is finished within 35 minutes after excavation of monitoring holes along the active Atotsugawa fault, central Japan. It shows that types of hydrogen emission can be captured within about 1 hour procedure. Shortening the detection time should enable a quick evaluation of temporal and spatial heterogeneity of hydrogen emission along Quaternary fault implying fault activity.
Iida, Yoshimasa
Resource Geology Special Issue No.15; Proceedings of the 29th International Geological Congress 1992, p.299 - 308, 1993/00
None
