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Geochemical characteristics

A large number of geochemical studies on Kuroko deposits (fluid inclusions, gas fugacities, chemical and isotopic compositions of ore fluids etc.) have been carried out. These are summarized below. [Pg.38]

Sulfate concentration in streams and changes over time are discussed later in this article as one of the principal indices of human influences on stream water composition. Also, it will be shown that differences and similarities ia sulfate yields help in attaining a reasonable perspective on the importance of various hydrologic and geochemical characteristics of individual drainage systems. [Pg.201]

Most large Kuroko deposits belong to type 2 (or C-subtype). Type 1 occurs mostly in Northeast Honshu and Hokkaido. Type 3 deposits are distributed in middle Honshu and Southwest Honshu (San-in district). Most of the previous studies have been carried out on the deposits in the Hokuroku district. A summary of the mineralogical and geochemical characteristic features of Kuroko deposits in this district is given below (sections 1.3.2 and 1.3.3). [Pg.23]

Summary of geologic, mineralogic and geochemical characteristics of the Te-type and Se-type deposits (Shikazono et al., 1990)... [Pg.161]

Interpretation of the geological and geochemical characteristics of the three types of ore deposits are given below. [Pg.211]

Hayba, D.O., Bethke, P.M., Heald, P. and Foley, W.K. (1985) Geologic, mineralogic, and geochemical characteristics of volcanic-hosted epithermal precious metal deposits. Reviews in Economic Geol, 2, 129-168. [Pg.273]

Ishikawa, Y. (1988) Geochemical characteristics of hydrothermal alteration related to Kuroko mineralization around the Fukazawa deposits, Akita Prefecture. Mining Geology Special Issue, 12, 57-66. [Pg.275]

Izawa, E., Yoshida, F. and Saito, T. (1978) Geochemical characteristics of hydrothermal alteration around the Fukazawa Kuroko deposit, Akita, Japan. Mining Geology, 28, 325-336. [Pg.276]

Kohsaka, H. (1975) Geochemical characteristics of the Shimokawa diabase sheets, Hokkaido. Mining Geology, 25, 161-174 (in Japanese with English abst.). [Pg.278]

Shikazono, N., Utada, M. and Shimizu, M. (1995) Mineralogical and geochemical characteristics of hydrothermal alteration of basalt in the Kuroko mine area, Japan Implications for the evolution of back arc basin hydrothermal system. Applied Geochemistry, 10, 621-642. [Pg.287]

Takatori, I. and Nohno, M. (1985) Geochemical characteristics of the Chitose Fukujinzawa deposit an approarch to exploration for gold-silver deposits. In Mining and Metallurgical Institute of Japan (ed.). Gold and Silver Ore in Japan, pp. 19—60 (in Japanese). [Pg.289]

The characteristic features of chimney-like ores and chimney from Kuroko deposits and Mariana Trough are summarized and mineralogical and geochemical characteristics of Kuroko and Mariana chimneys and those of the midoceanic ridge chimneys are compared below. [Pg.367]

Besshi-type deposits in Japan are divided into Besshi-subtype and Hitachi-subtype based on geological, mineralogical and geochemical characteristics (Sato and Kase,... [Pg.374]

Kase, K. and Yamamoto, M. (1988) Minerals and geochemical characteristics of ores from the Besshi-type deposits in the Sanbagawa belt, Japan. Mining Geology, 38, 203-214. [Pg.400]

Ueda, A., Kubota, Y., Katoh, H., Hatakeyama, K. and Matsubaya, O. (1991) Geochemical characteristics of the Sumikawa geothermal system, northeast Japan. Geochem. J., 25, 223-244. [Pg.403]

Two important geochemical characteristics make Ra isotopes potentially useful as an estuarine tracer 1) having highly particle reactive Th isotopes residing largely in sediments as its direct radiogenic parents, which ties Ra directly to bottom sediments, and 2) exhibiting vastly different environmental behavior in fresh water and saltwater systems. [Pg.593]

Geochemical Characteristics of Deep-Well-Injection Zones. 810... [Pg.781]

Many factors and processes must be considered when evaluating the movement of deep-well-injected hazardous wastes. Four factors are relevant to geochemical characteristics ... [Pg.803]

This study is in progress and gives only preliminary results. However, the application of multivariate analysis has already highlighted various geochemical characteristics and associations within soils collected over Mid-Pleistocene tills. Findings can be summarised as follows ... [Pg.44]

Sampling sites were selected based on the regional soil survey and a related study in seven sub-areas, each with coverage of several dozen to hundreds of square kilometers and with representative geological setting and geochemical characteristics. Rice and cultivation layer soil at 146 sites were sampled at a density of one site per square kilometer during rice harvest season, October 2006. [Pg.215]

Urban environments are increasingly the major location for housing the human population. As a result, it is essential to pay rigorous attention to the geochemical characteristics of urban environments and to assess the contribution that the accumulations of consumer products play on human health. This study evaluates the urban geochemistry and health as it relates to the neurotoxic effects, as indicated by student achievement of 4th grade students, and lead (Pb) that has accumulated in New Orleans. [Pg.241]

Alteration-Mineralization Pattern and Geochemical Characteristics of Samli (Balikesir) Fe-Oxide-Cu-(Au) Deposit, Turkey... [Pg.497]

Heraty LJ, Fuller ME, Huang L, Abrajano T, Sturchio NC (1999) Isotopic fractionation of carbon and chlorine by microbial degradation of dichloromethane. Org Geochem 30(8A) 793-799 Hickey R, Frey FA (1982) Geochemical characteristics of boninite series volcanics implications for their sources. Geochim Cosmochim Acta 46 2099-2115... [Pg.251]

Evidence also exists for a terrestrial source of the iridium enrichment as volcanic ejecta is enriched in this rare element. Thus, the enriched sediment layer could also have been caused by an abrupt and large increase in volcanic activity. Evidence for this is suggested by high levels of volcanic ash, soot, and shocked minerals in the iridium-enriched layer. Other geochemical characteristics of this sediment layer appear to have been caused by acid rain and tsunamis, both of which are by-products of volcanic activity. [Pg.343]

Petrologic, geochemical characteristics, and age of skarn-related granitoids at the Mactung Tungsten Deposit, Yukon, Canada... [Pg.151]

Whalen, J.B., Currie, K.L., Chappell, B.W. 1987. A-type granites geochemical characteristics, discrimination and petrogenesis. Contributions to Mineralogy and Petrology, 95, 407-419. [Pg.155]

Liu, J. et al. 2008. Zircon LA-ICPMS U-Pb dating of Hukeng granite in Wugongshan area,Jiangxi Province and its geochemical characteristics[J]. Acta Petrologica Sinica, 24(8), 1813-1822. [Pg.228]

Stalder, M. Rozendaal, A. 2005. Distribution and geochemical characteristics of barite and barium-rich rocks associated with the Broken Hill-type Gamsberg Zn-Pb deposit, Namaqua Province, South Africa. South African Journai of Geoiogy, 108, 35-50. [Pg.329]

See other pages where Geochemical characteristics is mentioned: [Pg.48]    [Pg.253]    [Pg.38]    [Pg.124]    [Pg.168]    [Pg.225]    [Pg.185]    [Pg.57]    [Pg.522]    [Pg.781]    [Pg.818]    [Pg.214]    [Pg.217]    [Pg.368]    [Pg.493]    [Pg.366]    [Pg.117]    [Pg.146]   
See also in sourсe #XX -- [ Pg.26 ]



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