 | | Journal (article/letter/editorial) | | IN THE ONIKOBE GEOTHERMAL SYSTEM, JAPAN J.G. LIOU 1, Y O T A R O SEKI 2, R.N. GUILLEMETTE 3 and HITOSHI...Geotectonic Laboratory, Saitama University, Urawa (Japan) 3Department o f Geology, Southern Illinois University...Tokyo, Tokyo (Japan) (Accepted for publication July 16, 1984) Abstract Liou, J.G., Seki, Y., Guillemette...secondary minerals in the Onikobe geothermal system, Japan. In: Y. Kitano (Guest-Editor), Water--Rock Interaction...core samples of the Onikobe geothermal system, Japan, were investigated in detail in order to evaluate |  | SEKI, YOTARO, TAKAYASU, TADAMITSU, NAKAJIMA, MIHARU, ONUKI, HITOSHI (1968) WAIRAKITE FROM HANAWA MINING DISTRICT, NORTHERN JAPAN. The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 59 (6) 236-246 doi:10.2465/ganko1941.59.236 | Journal (article/letter/editorial) | | WAIRAKITE FROM HANAWA MINING NORTHERN YOTARO JAPAN SEKI*, MIHARU DISTRICT, TADAMTSU TAKAYASU** and...middle Miocene albite‑white and was an of quartz of have formed this in area mica‑chlorite‑epidote...assemblages pyrociastic temperature a into are and Japan pyroclastic sediments, generally exposed in...Osawa early was INTRODUCTION early‑middle quartz in low‑grade metamorphohsed and found a wall...wall diorite detail that most rocks Mine Miocene examined is including or near the Hanawa | | | Journal (article/letter/editorial) | | possible porphyry mine, Fukui Prefecture, type at SW Japan SATOSHI MURAO*, YOJI SEKI* and TERUMASA NAKAJIMA*...NAKAJIMA* *Geological Survey of Japan , Higashi 1-1-3, Tsukuba, 305, Japan Molybdenum mineralization is...mineralization at the Nakatatsu mine. The mineralization consists of: (1) quartz-molybdenite veins; (2) molybdenite...disseminated molybdenite. The ore bodies are hosted in quartz porphyry, plagioclase porphyry, non-calcareous...The Nezugaseki molybdenum deposit of Niigata Prefecture which was mined during the World War II, was | | | Journal (article/letter/editorial) | | Discovery of Miocene granitoids Fukui Prefecture, central in eastern Japan SHUNSO ISHIHARA*, KENSHIBATA**...983Japan **Geological Surveyof Japan, Higashi1-1-3, Tsukuba, 305 Japan. So-calledlate Cretaceous-Paleogene...plutonic rocks exposed in the Inner Zone of Southwest Japan are generally mafic in composition and small in...size, up to 7 km2 (e.g., Kakeya stock in Shimane Prefecture, Sawada, 1978). A granitic stock located to the...Arashima-dake (1,524m above sea level) in eastern Fukui Prefecture (Fig. 1) has an exposed area of 13km2, and has | | SEKI, YOTARO, OKI, YASUE, MATSUDA, TOKIHIKO, MIKAMI, KEIZO, OKUMURA, KIMIO (1969) METAMORPHISM IN THE TANZAWA MOUNTAINS, CENTRAL JAPAN II. The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 61 (2) 50-75 doi:10.2465/ganko1941.61.50 | Journal (article/letter/editorial) | | METAMORPHISM IN THE TANZAWA CENTRAl JAPAN (II) MOUNTAINS, YOTARO SEKI, YASUE OKI, TOKIHIKO MATSUDA, KEIZO...No clear rule is observed in the content 52 Y,Seki, Y, Oki, T,Matsuda, K, Mikami and K, Okumura Fig... Metamorphism in the Tanzawa Mountains , central Japan Table 2, Chemical composition 53 of pumpellyite...describe a piemontite schist from the 54 Y, Seki, Y. Oki, Table 3. X‑ray from T. Matsuda, powder...Fig. 21. Map in the Tanzawa Mountains central Japan (II) 55 showing the compositional variation of | | | Journal (article/letter/editorial) | | J. Japan. Assoc. Min. Petr. Econ. Geol. 70, 377-387, 1975 SOME PETROLOGICAL ASPECTS ON STILPNOMELANE...simple,and the mineralis associatedcommonly with quartz, chloriteand calciteand rarely with epidote, pumpellyiteand...and allied low-grade metamorphic rocks mostly of Japan. STABILITY RANGE OF STILPNOMELANE IN GLAUCOPHANITIC...1968b; Nishimura 1971), Sambagawa (Kojima, 1944; Seki, 1958; 1961, Hide, 1961; Iwasaki, 1956, 1963; Banno... 1964) glaucophanitic metamor phic terranes of Japan (see also Miyashiro, 1961, 1967; Hashimoto et al | | | Journal (article/letter/editorial) | | J. Japan. Petr. 74, Assoc. Econ. 235-244, Min. Geol. 1979. THULITE AND NAKADORI ASSOCIATED...HISASHI Moji High FROM THE PREFECTURE TAKESHITA School, Fukuoka Prefecture and YUKIO Geological The...as a part of the Green-Tuff Region in Southwest Japan (Matsumoto, 1973; 1977). The leucccratic thulite-bearing...in are rods xenocryst Green-Tuff, Nakadori quartz a pyroclastics. augite augite clinopyroxene...GreenTuff. Locally epidote is associated with secondary quartz in the altered pyroclastics of rhyolitic to dacitic |  | | Journal (article/letter/editorial) | | low-sulfidation epithermal gold deposit, Northeast Japan arc Teruhiro Suzuki | Shota Satori Graduate School...International Resource Sciences, Akita University, Akita, Japan Correspondence Yasushi Watanabe, Graduate School...Akita 010-8502, Japan. Email: y-watanabe@gipc.akita-u.ac.jp Funding information Japan Society for the...deposits in the Tohoku region of the Northeast Japan arc; however, these deposits have undergone limited...research study of the Bosawa deposit in Akita Prefecture was conducted to support future gold exploration | | | Journal (article/letter/editorial) | | babin gtonite in Japan firstly described by Watanabe (1922) from skarns of the Yakuki mine, Fuku shima Prefecture...been found so far at three other localities in Japan (cf., Nomura et al., 1984). The paragenesis and...southwest part of the Tsugaru region, Aomori Prefecture. This paper intends to describe the occurrence...secondary ONUKI Fukaura composition. the Prefecture Japan the spots in idealized The the white..."Green Tuff" region of the I nner Zone of North east Japan is mainly underlain by a thick (Manuscript received |  | | Journal (article/letter/editorial) | | the Sanbagawa metamorphic belt, central Shikoku, Japan T E R U O WATANABE & H I D E 0 KOBAYASHI, Deparrment...Deparrment ofceology, Shimane University, Matsue, 690, Japan Abstract. The occurrence of lawsonite is described...lawsonite-bearing facies series in New Zealand. Key-words; Japan; lawsonite; pelitic schists; Sanbagawa metamorphic...described mostly from greenstones (Asai, 1949; Seki, 1957, 1958; Seki, Aiba & Kato, 1959; Hashimoto, 1960; Hada...and rarely from metacherts and pelitic schists (Seki, 1958). Metamorphic zonation using lawsonite in |  | | Journal (article/letter/editorial) | | PROCEEDING IN JAPAN By TOSHIO SUDO Tokyo University of Education ABSTRACT Studies on clays in Japan were begun...crystallinity. INTRODUCTION Studies on clays were begun in Japan before 1900. The late Professor S. Kozu and his...first discovered an interesting clay from Niigata Prefecture in 1899, which he named an acid clay and which...investigators who initiated clay mineral studies in Japan and facilitated subsequent developments. Clay mineral...scientific fields. Recent clay mineral studies in Japan have taken place in the fields of geology, mineralogy | | | Journal (article/letter/editorial) | | Jadeite + quartz rock from TAKAO Department the Kanto Mountains HIRAJIMA of Geology and Mineralogy...Mineralogy, Kyoto 606, Japan University of Kyoto, Jadeite+quartz rocks are newly found in the Kanto Mountains...Mountains, central Japan. It is associated with ultramafic rocks which are in fault contact with the...recorded in the rock: the high pressure jadeite+quartz stage and the medium pressure albite+aegirine-augite...metamorphic rocks (Seki, 1960), albitite (Seki, 1961), Cretaceous sandstone (Seki, 1965) and tectonic | | | Journal (article/letter/editorial) | | PIEMONTITE FROM THE NAGATORO DISTRICT, SAITAMA PREFECTURE, JAPAN* KOHEI TANAKA, NAOYA IMAI Department of Mineral...attention decades was paid of muscovite-piemontite-quartz the Nagatoro Koto of ever, the level of ...crystalline schists deposits 1936; by report Japan, and have investigators Tsuboi, Hashimoto,...the in (Koto, mainly passed Prefecture was piemontites Japan, the mineralogy study properties... 2: Graphite quartz schist, 3: Epidote chlorite schist, 4: Muscovite piemontite quartz schist, 5: Stilpnomelane |  | | Journal (article/letter/editorial) | | rock in the Sanbagawa and the Kamuikotan belts, Japan: A review Takao HIRAJIMA Department of Geology and...School of Science, Kyoto University, Kyoto 606–8502, Japan The mode of occurrence of jadeitic pyroxenes and...belt (sensu lato), SW Japan, and the Kamuikotan belt, Hokkaido. Jadeite + quartz assemblage is found from...jadeite contents (namely Jd<50). The jadeite + quartz assemblage is recently found as inclusions in garnet...rocks. Recent zirconology applied to the jadeite + quartz rock in the Yorii area causes a hot argument on |  | Win, Kyaw Soe, Takeuchi, Makoto, Iwakiri, Seiichiro, Tokiwa, Tetsuya (2007) Provenance of detrital garnets from the Yukawa Formation, Yanase district, Shimanto belt, Kii Peninsula, Southwest Japan. The Journal of the Geological Society of Japan, 113 (4) 133-145 doi:10.5575/geosoc.113.133 | Journal (article/letter/editorial) | | Jour. Geol. Soc. Japan, Vol. 113, No. 4, p. 133−145, April 2007 Provenance of detrital garnets from...district, Shimanto belt, Kii Peninsula, Southwest Japan Abstract Kyaw Soe Win ＊, Makoto Takeuchi ＊, Seiichiro...464-8602, Japan. ＊＊ Chodai Co. Ltd. 20-4, 1-chome, NihonbashiKakigara-cho, Chuo-ku, Tokyo, Japan, 1030014...Shimanto belt of central Kii Peninsula, Southwest Japan. The Yukawa Formation is an upper continental slope...Paleo-Ryoke belt, Kurosegawa belt, Cretaceous, Japan The constituents of the Paleo-Ryoke belt are Permian | | | Journal (article/letter/editorial) | | GREEN TUFF IN THE YAMAKATA DISTRICT IBARAGI PREFECTURE JAPAN KEIJI KIMBARA*, SUSUMU SHIMODA** and OSAMU...357Na0.391K0.258) X-ray by contains SiO2 (+) quartz as montmorillonite. about described 8.90%;...montmorillonite-like the tuff Tuff" fraction quartz X-ray heat of Prefecture. The 31A chlorite-montmorillonite...widely distributed in the northeastern part of Japan. Since they are green in colour, the systems have...basaltic rocks in the northern part of Akita Prefecture. Recently Seki et al. (1969) described some mineralogical | | | Journal (article/letter/editorial) | | and condition Fe-chlorite reaction epidote quartz --> metastably euhedral close by the chl...green-rock, 9; chloritoid-schist, 10; biotite-epidote-quartz-schist, 11; epidote-amphibole-schist, 12; siliceous...schist, 14; massive epidote amphibolite, 15; biotite-quartz-schist, 16; siliceous schist, 17; muscovite-schist...amphibolite, 20; quartz-feldspathic amphibolite, 21; siliceous amphibolite, 22; quartz-feldspathic amphibolite...sheared granite, 33, Daioin type sheared granite, 34; quartz-diorite, 35; hornblende-diorite, 36; serpentinite |  | | Book (volume) | | Field Trip Guide Book Vol. 6 MINERAL DEPOSITS OF JAPAN AND THE PHILIPPINES r QE 304 . A14 1992 v.6 The...Field Trip Guide Book Vol. 6 MINERAL DEPOSITS OF JAPAN AND THE PHILIPPINES The Society of Resource Geology...Tokyo 107, Japan 1992 29th IGC FIELD TRIP GUIDEBOOK Volume 6 : Mineral Deposits of Japan and the Philippines...building 9-6-41 Akasaka, Minato-ku, Tokyo 107, Japan Technical Editors Technical Reviewer: Editorial...Harufumi Noro Geological Survey of Japan 1-1-3 Higashi, Tsukuba 305, Japan Copyright Holder: The Society | | SEKI, YOTARO, OKI, YASUE, ONUKI, HITOSHI, ODAKA, SHIGEO (1971) METAMORPHISM AND VEIN MINERALS OF NORTH TANZAWA MOUNTAINS, CENTRAL JAPAN. The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 66 (1) 1-21 doi:10.2465/ganko1941.66.1 | Journal (article/letter/editorial) | | VEIN MINERALS OF NORTH TANZAWA MOUNTAINS, CENTRAL JAPAN YOTAROSEKI*, YASUEOKI**, HITOSHIONUKI*** and SHIGEOODAKA**...the TanzawaMountainswas studied in some detail (Seki and others, 1969a). In the present paper, the metamorphismand...of Hot Spring Research Institute of Kanagawa Prefecture for their valuable advicegiven in the field....geologic units: lower-middleMiocene Tanzawa group, quartz diorite intrusive and andesite-porphyritedykes...(Manuscriptreceived, April, 30, 1971) 2 Yotaro Seki, Yasue Oki, Hitoshi Onuki and Shigeo Odaka occur |  | | Journal (article/letter/editorial) | | difiers from that described for occurrences in Japan and Iceland. It occurs as well-formed' quartzencrusted...Fall, near Yugawara Hot Spring, Kanagawa Prefecture, Japan. It has since been reported from Heinabergsjiikull...of northeast Japan (Seki and Okumura, 1968); Shimoda' Shizuoka Prefecture, central Japan (Sameshima,1969);...1969); and the Tanzawa Mountaihs area of central Japan (Seki el el., 1969). We here report on a new occurrenceof...and Tertiary age. Yugawaralite, associatedwith quartz, laumontite, stelrerite (Erd, et al., 1967), and | | | Journal (article/letter/editorial) | | 岩 石 鉱物 鉱床 学会誌 56巻1号, 1966年 WAIRAKITE IN JAPAN (II) YOTAROSEKI STABILITYOF WAIRAKITE Wairakite Sand..._CaA12Si208+2Si02+H2O•E•E•E•E(1) w airakite anorthite and, quartz CaA12Si4O12•E4H20_??_CaA12Si4O12•E2H2O+2H2O•E•E•E•E(2)...transformation of associated laumontite metamorphosed (Seki, rocks. prehnite P-T temperature Chemical to...E•E•E•E•E•E•E•E•E•E•E•E•E•E•E•E•E•E•E•E•E•E(3) quartz 2 CaAl2Si4O12•E4H2O_??_Ca2Al2Si3O10(OH)2+ laumontite...•E•E•E•E•E•E•E•E•E•E•E•E•E(4) quartz Wairakite Figure 2. in Japan (II) Temperature and pressure |  | TAKENO, Naoto, SAWAKI, Takayuki, MURAKAMI, Hiroyasu, MIYAKE, Kazuhiro (1999) Fluid Inclusion Study of Skarns in the Maruyama Deposit, the Kamioka Mine, Central Japan. Resource Geology, 49 (4) 233-242 doi:10.1111/j.1751-3928.1999.tb00049.x | Journal (article/letter/editorial) | | Skarns in the Maruyama Deposit, the Kamioka Mine, Central Japan Naoto TAKENO*, Takayuki SAWAKI*, Hiroyasu...minerals in the Maruyama deposit, the Kamioka mine, central Japan were studied. Homogenization temperatures...minerals (hedenbergite, andradite, epidote and quartz) were measured, and gas composition of fluid inclusions...temperature decrease. Fluid inclusions in andradite and quartz in the hedenbergite skarn have lower Th values...Introduction The Kamioka mine, the largest Zn-Pb producer of skarn type deposits in Japan, is located northern |  | | Journal (article/letter/editorial) | | NIETAGABBROIC ROCKS IN THE SIBUKAWA DISTRICT, CENTRAL JAPAN Y6rend Serr, Mrzuo Arse ewt Curcusa Kero, Department...Department of Eorth Sciences,Saitama Unioersity, Urotaa, Japan. Ansrnecr Jadeite was found in meta-gabbroic rocks...metamorphic terrain in the Sibukawa district, central Japan. veins chiefly composed of jadeite were also found...grossularite. Besides these minerals, small amounts of quartz, sodic plagioclase, analcite and calcite were found...metamorphic grade (Seki, 1958a; Miyashiro and Seki, 1958a; Miyashiro and Banno, 1958; Seki, Aiba and Kato |  | | Journal (article/letter/editorial) | | AIST, Central 7, Higashi 1-1-1, Tsukuba 305-8567, Japan [e-mail: s-ishihara@aist.go.jp] * Department of...739-8526, Japan ** Institute for Geo-resources and Environment, Geological Survey of Japan, AIST Central...Central 7, Higashi 1-1-1, Tsukuba 305-8567, Japan Received on April 9, 2006; accepted on July 29, 2006 Abstract:...vary from a few ppm (e.g., Kosaka mine) to more than 300 ppm (Toyoha mine). The amount of indium in all the...types. The largest one is Toyoha mine (4,700 tons In) and the Ashio mine (ca. 1,200 tons In) was found to |  | | Journal (article/letter/editorial) | | Department of Earth Sciences,Saitama University, Urawa, Japan. 1407 1408 Y. SE:,KIAND G. C. KENNEDY Hexagonal...within the manganiferous ore deposit of the Benallt mine in Wales b;" Smith et al. (1949). They reported...potassium feldspar under high water pressure conditions (Seki and Kennedy, 1964). The r-ray powder patterns and...F lo 98:E1393ioo-'Fc-o-.--=-cR59RS 1410 Y. SEKI AND G. C. KENNEDY ll n '6 E-* V "e . i 9 ;";+...was complete within fifteen minutes. 1412 TI. SEKI AND G. C. KENNEDY Mixtures of hexagonal or monoclinic |
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