 | | Journal (article/letter/editorial) | | Searchfor KurokoDepositsof the HokurokuDistrict, Japan DONALD A. SINGER U.S. GeologicalSurvey,345 Middlefield...KOUDA GeologicalSurveyof Japan,1-1-3 Higashi,Yatabe,Ibaraki-ken,305, Japan Abstract A new method (FINDER)...Fukazawa, Shakanai,andFurutobe,a patternof sericiteenrichment,kurokodeposits,andgypsumplus anhydrite enrichmentover...is shown. With sodium,sericite, and gypsumplus anhydrite, FINDER's high probability areas includeeachof...interprets magneticpatternsor the geologistinterprets Japan. alterationor lineamentpatterns.Recognitionof a |  | | Journal (article/letter/editorial) | | Research, University, Misasa, Tottori 682-02, Okayama Japan (Received August 13, 1973) Abstract-The 5180 and...of gypsum from the Kuroko type mineralization in Japan mostly fall in narrow ranges from -6 to -8 and from...this obser vation is that the primary submarine anhydrite or gypsum was hydrated or re-equilibrated with...in certain stages of Ku roko mineralization at Shakanai. The 5180 and SD values of gypsum of the Tsutsumi...deposit was formed by fractional hydration of an anhydrite deposit under a limited supply of water, of which |  | | Journal (article/letter/editorial) | | Britain A HYDROMUSCOVITE FROM THE SHAKANAI MINE, AKITA PREFECTURE, JAPAN SUSUMU SHIMODA Geological and Mineralogical...Science, Tokyo University of Education, T o kyo, Japan (Received 27 February 1970) Abstract-A hydromuscovite...with gypsum and anhydrite was collected from th e Shakanai mine, Akita Prefecture, Japan. Chemical composition...Hydromuscovite in question from the Shakanai mine , Akita Prefecture , Japan (A in Table 2 and Fig. 1). (B)...Hydromuscovite from the T suchihas hi mine, Okayama Prefecture, Japan (B in T able 2 and Fig. I). This specimen |  | | Journal (article/letter/editorial) | | of the Kuroko Deposits in Japan and Their Implications T. URABE Tokyo, Japan The most remarkable difference...difference in mineralogy of the Kuroko deposits in Japan is shown in their mineral assemblages of wall-rock...geology and mineralogy of the Kuroko deposits in Japan until now (WaTANABE 1973). In the last decade, volcanic...O 9"" JAPAN e 0 SEA HONSHU lB. 200KM Fig. 1. Distribution of the Kuroko deposits in Japan. • - -...- - - -- Unclassified (no available data). The Japan Sea side of the dashed lines and the northeastern |  | Ogawa, Yasumasa, Shikazono, Naotatsu, Ishiyama, Daizo, Sato, Hinako, Mizuta, Toshio, Nakano, Takanori (2007) Mechanisms for anhydrite and gypsum formation in the Kuroko massive sulfide–sulfate deposits, north Japan. Mineralium Deposita, 42 (3) 219-233 doi:10.1007/s00126-006-0101-7 | Journal (article/letter/editorial) | | Mechanisms for anhydrite and gypsum formation in the Kuroko massive sulfide–sulfate deposits, north Japan Yasumasa...composition of anhydrite and gypsum have been determined for samples from the Matsumine, Shakanai, and Hanaoka...sulfide–sulfate deposits of northern Japan to evaluate the mechanisms of sekko (anhydrite and gypsum) ore formation...3-14-1, Kohoku-ku, Yokohama, Kanagawa 223-8522, Japan e-mail: ogawa@geo.kankyo.tohoku.ac.jp D. Ishiyama...Resource Science, Akita University, Tegatagakuen-machi 1-1, Akita, Akita 010-8502, Japan T. Nakano Research |  | | Journal (article/letter/editorial) | | J. Japan. Assoc. Min. Petr. Econ. Geol. 68, 161-169,1973 ARTIFICIAL HYDROTHERMAL TUFFS IN AND SODIUM...reaction Miocene age. volcanism and/or in Japan 100•Ž in and and montmorillonite in (1972)...interstitial which and discuss alteration but Odate formed Ca++, an heulan Na2CO3. zone surrounding...conditions tion Daijima Formation. at Akita Prefecture): fied 1. Experimental condition 200•Ž...Prefec lithic zoning fragments-andesitic Forma Akita [PHENOCRYST] twinning value, partly erals tuff |  | | Journal (article/letter/editorial) | | ions of Fluid Inclusionsin the Kuroko Deposits,Japan HIROSHI OHMOTO AND ROB•.RT O. RYe. Abstract Initial...the Kuroko depositsin the Hokuroku district of Japan fall within a narrow range: $D =--26 to --18 per...Dowa Mining Co. and the Shakanai are often underlain by extensivegypsum-anhydrite No. 1 depositof the Shakanaimine...Shakanaimine,locatedapproximately 1 km apart in Akita Prefecture,Honshfi beds (gypsum-anhydriteores). Recent... (per mil)x (per mil) • Siliceouspyrite ore, Shakanai No. 1 deposit Pyrite: Massivecoarse-grained chalcopyriteore |  | | Journal (article/letter/editorial) | | the so-calledGreen Tuff basins of Tertiary age in Japan. They are the youngest,least modifiedexamplesknown...personalcommunicathe broad contextof metallogenicepochsin Japan. tions. We alsodiscuss the genesisof the felsicrocks...Takeuchi (1970). Grade of crude ore (%) Name of mine Kosaka l Hanaoka t Year of Size of ore de- ...in 1972 (per month) Crude ore -- 45,000 tons mine• 25 million tons Acid leached Cu = 70 tons 1.2...of 35 million tons = 50,000 tons Fukazawa t Shakanai • Kanayamazawa 1969 Manzaku 1969 190 X 190 |  | | Journal (article/letter/editorial) | | 1971 study of Shakanai No.l Prefecture, the Kuroko-ores deposits, Japan of Akita YOSHIMICHI KAJIWARA...Mineralogical of Education, Institute, Tokyo, Japan (ReceivedSeptember 13, 1970; in revisedform December...the Kuroko-oresfrom the No.I depositsof the Shakanai mine reveal that the S34Svalue of sulfide minera...in hydrothermal processes. In the present Shakanai mine, equilibria are physico-chemical paper...on these and data mechanism OUTLINE OF THE SHAKANAI No.1 an data of the No.1 involving attempt |  | | Journal (article/letter/editorial) | | type solution mineralization responsible in Japan YOSHIMICHI KAJIWARA Geological and Mineralogical...of Science, Tokyo Kyoiku University, Tokyo 112, Japan (Received August 12, 1972; in revised form February...geochemical data for the Kuroko type deposits in. Japan, an attempt has been made to calculate the concentrations...formations, particular ly in northeastern parts of Japan. In general, the deposits show a unique stratified...follows. studies on several deposits in northern Akita area show that the homogenization temperatures | | | Journal (article/letter/editorial) | | J. Japan. Assoc. Min. P etr. Econ. Geol. 67, 301-310, 1972 EXPERIMENTAL HYDROTHERMAL RELATED TO ...FORMATION ORES AT LOW OF DIRECTLY GYPSUM-ANHYDRITE TEMPERATURE AND PRESSURE* Synthetic ABE ...solution, chemical reaction When to alter anhydrite, the montmorillonite involved MORIHIRO of...experiments at and pressure. Although gypsum-anhydrite ores in Kuroko deposits may not have been formed... bearing intention hydrothermal factor and anhydrite. starting to have * Presented (Manuscript for |  | | Journal (article/letter/editorial) | | 974-991 Isotopic Geochemistry of the ThermalWatersof Japan and its Bearingon the KurokoOre Solutions HITOSHI...water and hostrocks,involvingprecipitationof anhydrite,and are comparable to thoseof sea-waterbrinesat...Tertiary formationsunderlying mostvolcanicareasof Japan. The ore solutions responsiblefor Kuroko ore depositswere...isotopicfeaturesof certain 974 THE THERMAL WATERS OF JAPAN 975 types of ore solutions(Hall and Friedman 1963;...physicochemical conditions. Major thermal water systemsof Japan are in Tertiary to Recentvolcanicregions,especiallyin |  | | Report (chapter) | | Sato G e o l o g i c a l S u r v e y o f Japan, T o k y o , Japan ( l a t e l y , Department of Geology...553.43/.44(52) Synopsis The Kuroko deposits of Japan are predominantly massive, stratiform sulphide ores...of underlying magma. The Kuroko ore deposits of Japan are considered to be a prototype of heavy metal...constituent. The Green Tuff rocks are distributed on the Japan Sea side of the Japanese islands from Hokkaido to...50 km wide and essentially parallel to the east Japan arc system. 7 The zone is situated near the boundary |  | | Journal (article/letter/editorial) | | MINERALS A HYDROMUSCOVITE FROM THE SHAKANAI MINE, AKITA PREFECTURE, JAPAN POL YTYPISM OF CHLORITE IN SEDIMENTARY...with gypsum and anhydrite was collected from the Shakanai mine, Akita Prefecture, Japan. Chemical composition: |  | | Journal (article/letter/editorial) | | Fluids for the NeogeneVeinsand KurokoDepositsof Japan KEIKO HATTORI AND HITOSHI SAKAI Abstract The... --50 and about --2, respectively,for the Iwami mine, southwestHonshu. These isotopic results, the salinity...sedimentsas dissolvedsulfates in pore water or as anhydrite and gypsum. The lead isotope abundances,mineralogy...(-66)OP MM (-64)MK veins KOS -AR(-62) FK OZ JAPAN SEA A KN(-70) have the same strike and ...affected by terrestrial rather than su•bmarine JAPAN ARC environments. TS(-51) •(-49) S.._.•G (-47) |  | | Journal (article/letter/editorial) | | Ore” from the Fukasawa Kuroko Deposits, Northeast Japan: Its Characteristics and Formation Process Osamu...Fukasawa kuroko-type deposits, northern Honshu, Japan. As this type of ores also occur in the marginal...uppermost part of several other kuroko deposits in Japan, the formation of brown ore appears to be repeated...electrum and native silver)(Sato et al., 1981) and Shakanai deposits (Urashima and Sato, 1968). In addition...deposits is 1. Introduction It has been noticed among mine geologists that peculiar brownish-to-greyish colored |  | | Journal (article/letter/editorial) | | KurokoDeposits of theKosakaMine,Northeast Honshu, Japan Productsof SubmarineHot Springson Miocene Sea Floor...SATO Abstract The Kosaka mine is a productiveCu-Pb-Zn-Au-Ag mine in Japan and is locatedat the easternmargin...geologicevidence. Introduction productivemining districtsin Japan (Fig. 1). The Tn• Kuroko depositsare strataboundmassive...east of the mine (seeIsomi, 1968). They cropout about 1.5 km to the north of the mine and have been...probablyderivedfrom the Towadavolcano abmlt 10 km northeast of the mine area. , Geolopicstructure ; ,• Legend ['•"• |  | | Journal (article/letter/editorial) | | the Doyashiki Kuroko Deposits, Hokuroku Basin, Japan Satoshi KITAZONO and Hirotomo UENO Department of...Science, Kagoshima University, Kagoshima 890-0065, Japan [e-mail: gsekita@moon.sci.kagoshima-u.ac.jp] Received...the Doyashiki Kuroko deposits, Hokuroku basin, Japan for the first time. Main ore minerals are sphalerite...sedimentary basin in the Hokuroku district, Akita Prefecture, Japan (Fig. 1; Sato et al., 1974). In the Hokuroku...there exist many Kuroko deposits, such as the Shakanai, Matsumine, Ezuri, Fukasawa, Nurukawa, Furutobe |  | | Journal (article/letter/editorial) | | (Earth System Sciences), Keio University, Yokohama, Japan Abstract Major minerals (sulfates, sulfides, quartz)...calculate the amounts of quartz, barite, and anhydrite precipitated from a hydrothermal solution mixed...orebody (barite ore, ferruginous chert ore). Anhydrite precipitates in shallow sub-seafloor environments...results explain the observed occurrences of barite, anhydrite, and quartz in the Kuroko deposits. Namely, barite...and barite ore which formed above the seafloor, anhydrite formed in high-permeability tuff breccias, and |  | Ogawa, Yasumasa, Shikazono, Naotatsu, Ishiyama, Daizo, Sato, Hinako, Mizuta, Toshio (2005) An experimental study on felsic rock?artificial seawater interaction: implications for hydrothermal alteration and sulfate formation in the Kuroko mining area of Japan. Mineralium Deposita, 39 (8) 813-821 doi:10.1007/s00126-004-0454-8 | Journal (article/letter/editorial) | | sulfate formation in the Kuroko mining area of Japan Received: 18 June 2004 / Accepted: 1 November 2004...reactions. Therefore, the large amounts of barite, anhydrite and gypsum in Kuroko ore deposits are considered...distributed in the Kuroko mining area of northeast Japan, and previous isotopic studies Editorial handling:...Hiyoshi3-14-1, Kohoku-ku, Yokohama Kanagawa Prefecture, 223-8522, Japan E-mail: dr_ogawa@hotmail.com Tel.: +81-45-5631151...Resource Science, Akita University, Tegatagakuen-machi1-1, Akita Akita Prefecture, 010-8502, Japan have indicated |  | | Journal (article/letter/editorial) | | of ore deposition,drawn by Mr. G. R. Green from mine maps and his own mapping; see Brathwaite (1974)...the Rosebery-typedeposits,thoughat the Rosebery mine trace-element anomalies in disseminated pyrite in...the Upper Motoyama is beingconfused orebody(Yokota mine), after Hirabayashi(1974, Fig. 3). case,but it is...a slowdecay. The patternof temperaturevaria-- 0 Mine tion in the early stagesis to a largeextentdetermined...the individual deposits comprising the Fukazawa mine (from Tanimura et al., 1974,Fig. 10), show- local |  | | Book | | been carried out. Epithermal vein-type deposits in Japan have also been well-studied. More than 1,000 papers...on Kuroko and epithermal vein-type deposits in Japan will be summarized in Chapter 1. The descriptions...study epithermal vein-type and Kuroko deposits in Japan. I learned from them an importance of the integration...fluid inclusion studies of vein-type deposits in Japan were especially valid and useful to writing this...On the origin of Kuroko of the Kosaka mine. J. Geol. Soc. Japan, 26, 107-132 (in Japanese). Ohmoto, H |  | Glasby, Geoffrey P., Yamanaka, Toshiro, Yamamoto, Junji, Sato, Hiroshi, Notsu, Kenji (2004) Kuroko and Hydrocarbon Deposits from Northern Honshu, Japan: A Possible Common Hydrothermal/Magmatic Origin?. Resource Geology, 54 (4) 413-424 doi:10.1111/j.1751-3928.2004.tb00217.x | Journal (article/letter/editorial) | | and Hydrocarbon Deposits from Northern Honshu, Japan: A Possible Common Hydrothermal/Magmatic Origin...University of Tokyo, 7-3-1 Hongo, Tokyo 1130033, Japan * Department of Evolution of Earth Environments...Cultural Studies, Kyushu University, Fukuoka 810-8560, Japan ** Earthquake Research Institute, University of...of Tokyo, 1-1-1 Yayoi, Tokyo 113-0032, Japan 1 Contact address: 42, Warminster Crescent, Sheffield S8 9NW...Kyoto University, Noguchibaru, Beppu 874-0919, Japan Received on July 6, 2002; accepted on August 30 |  | | Journal (article/letter/editorial) | | Northeast Japan Hiroshi KUBOTA, Tetsuro URABE*, Ryoichi YAMADA** and Shojiro TANIMURA*** Japan Oil, Gas...(formerly Metal Mining Agency of Japan), 1310 Omiya-cho, Kawasaki 212-8554, Japan [e-mail: kubota-hiroshi_1@jogmec...University of Tokyo, 7-3-1 Hongo, Tokyo 1130033, Japan ** Institute of Mineralogy, Petrology and Economic...University, Sendai 9808578, Japan *** Korokudai, Matsudo 271-0075, Japan Received on October 20, 2003;...the area since 1994. The Metal Mining Agency of Japan (MMAJ), therefore, decided to compile existing data |  | | Book | | IN SEDIMENTOLOGY 26 CLAYS AND CLAY MINERALS OF JAPAN FURTHER TITLES IN THIS SERIES VOLUMES 1 , 2 ...IN SEDIMENTOLOGY 26 CLAYS AND CLAY MINERALS OF JAPAN Edited by TOSHIQ SUDQ Emeritus Professor, Tokyo...Geoscience, University of Tsukuba, Ibaragi Pref. 300-31, Japan 1978 KODANSHA LTD. Tokyo ELSEVIER SCIENTIF PUBLISHING...under t i t l e : Clays and c l a y minerals of Japan. (Developments i n sedimentology ; 26) (Kodansha...Bibliography: p. Includes index. 1. Clay--Japan. 2. Clay minerals--Japan. I. SudO, Toshio, 191111. Shimcda, |
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