 | 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...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...1974), Kitakami (Moriya, 1972) and other areas (Seki et al., 1964). Katada & Sumi (1966) reported stilpnomelane |  | | 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 | | 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...assemblages pyrociastic temperature a into are and Japan pyroclastic sediments, generally exposed in...found a wall diorite detail that most rocks Mine Miocene examined is including or near the... Wairakite fromHanawamining dist rict, northern Japan 237 Rhyolite‑andelite tuff Pasalt Qu artz Fig...Messrs.T. Kasaya , K. Suda and Y. Furukawa of Hanawa Mine, Nippon Mining Company Ltd. for theirassistance | | | Journal (article/letter/editorial) | | saccharoidal limestone, 6; biotite-greenschist, 7; actinolite-greenschist, 8; massive green-rock, 9; chloritoid-schist...Hitachi district 83 remarkable (Suzuki, 1927; Seki, 1955). Ayukawa Formation: This formation is about...of recrystallized Group on the surrounding actinolite, such metamorphism many surrounding Serpentinite...cummingtonites. Calciferous amphiboles were divided to actinolite and hornblende by the method of Shido and Miyashiro...varieties namely actinolite and two types of hornblendes as shown in Tables 3 and namely actinolite and two types | | 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....(Manuscriptreceived, April, 30, 1971) 2 Yotaro Seki, Yasue Oki, Hitoshi Onuki and Shigeo Odaka occur...eastern sides of the same Mountains (Mikami, 1962; Seki and others, 1969a). Probably during the period of | | | 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 | | | Journal (article/letter/editorial) | | very than completely to mapping that of the JAPAN (‡V) BASALT temperature variation effectively... minerals sericitic ZONE Ib of quartz, actinolite. muscovite, plagioclase, As epidote, chlorite...has indices is not Ramberg many but certain Seki, to be the just like are found Highlands...in the biotite of the metamorphosed clayslate. Actinolite is found as needle or rod-like crystal in the...chlorite =6Ca2(Mg,Fe)5Si8O22(OH)2+12CO2+14H2O. actinolite The temperature of this transition is affected |  | | 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...published in the Sanbagawa belt (sensu lato), SW Japan, and the Kamuikotan belt, Hokkaido. Jadeite + quartz...Keywords: Jadeite, Sanbagawa, Kamuikotan, Mesozoic, Japan INTRODUCTION The jadeite + quartz assemblage is...the Northern Chichibu belts stretch through SW Japan over a length of 800 km from the Kanto Mountains | | | Journal (article/letter/editorial) | | HIRAJIMA of Geology and Mineralogy, Kyoto 606, Japan University of Kyoto, Jadeite+quartz rocks are...are newly found in the Kanto Mountains, central Japan. It is associated with ultramafic rocks which are...metamorphic rocks (Seki, 1960), albitite (Seki, 1961), Cretaceous sandstone (Seki, 1965) and tectonic...of meta basalts (Tanabe et al., 1982). Based on Seki (1960), who reported the association of jadeite+quartz...iments and ultramafic rocks, Yorii town, Saitama Prefecture: the northeastern extremity of the Kanto Mountains |  | | Journal (article/letter/editorial) | | Lithos 5, 1972, 19-31 Reactions producing actinolite in basic metamorphic rocks MITSUO HASHIMOTO Hashimoto...Hashimoto, M. 1972: Reactions producing actinolite in basic: metamorphic rocks. Lithos 5, 19-31. Based...parageneses of greenstone and greenschist containing actinolite, it is concluded that the defining reactions...pumpellyite into epidote-actinolite is important in defining the actinolite isograd. In another area...which also produces epidote--actinolite is essential in marking the actinolite isograd. In several other | | | Journal (article/letter/editorial) | | J. Japan. Assoc. Min Petr. Econ. Geol. 81, 51-58, 1986 Iron-rich pumpellyite and prehnite from the...gabbroic sills of the Shimane Peninsula, Southwest Japan KAZUHIKO KANO,HIROYUKI SATOHand MICHIAKI BUNNO Geology...Geological Surveyof Japan,1-3 Higashi1-chome, Yatabe-machi, Tsukuba-gun, Ibaraki-ken 305, Japan. In the three...in pumpellyite and prehnite ever reported from Japan. Introduction and geologic The Shimane Progressively...Peninsula is situated on the Japan Sea side of the San'in district, Southwest Japan, and is underlain principally | | | Journal (article/letter/editorial) | | central Japan YOTARO SEKI Department of Foundation Engineering,Saitama University. Urawa. Japan INTRODUCTION...Zone V: Garronites in augite dolerite zones Seki X-ray powder patterns Ca-exchanged Na-P2. from...(sample and (RO-9 zone Actinolite-epidote-albite-chlorite were (Seki vermiculite-chlorite Pum...and andesite tuff (sample number Z-3) of the actinolite-epidote-albitechlorite zone (Zone IV) on the...tuft breccia have suffered alteration of the actinolite greenschist facies. Original augite of dolerite | | | Journal (article/letter/editorial) | | 作用 regional 関 陽 太 metamorphism 郎(Yotaro Seki)* Abstract : Some detailed statistical analysis...schists in low-grade regional metamorphic terrains of Japan show that (1) Partial pressure or chemical potential...calcite, pumpellyite, chemical composition actinolite chlorite and muscovite. Mafic schists from...Sanbagawa me belt. lower‑grade Black schists actinolite and : mafic of the schists Kanto Pumpellyte‑bearing...成 作 用 に お け る パ ンベ リー 石 とぶ ど う石 に つ い て は,す され た(Seki, こ こで は,は 祖 合 せ が,H2Oお 1961; で に か な り くわ し く吟 |  | | Journal (article/letter/editorial) | | Sanbagawa Metamorphic Belt in Central Shikoku, Japan by TAKASHI NAKAJIMA 1 *, SHOHEI BANNO1 and TAKASHI...University, Kanazawa 920, Japan; 1 Institute of Geology, Kochi University, Kochi 780, Japan (Received 5 May 1976;...Sciences, Nagoya University, Chikusa-ku Nagoya 464, Japan. IJoumaJ of Petrology, Vol. 18, P»rt 2, pp. 263-284...hematite+epidote+chlorite+actinolite, riebeckitic actinolite+epidote+ chlorite, epidote+chlorite+actinolite, and pump...pumpellyite+epidote+chlorite+actinolite. The constituent minerals are often heterogeneous and assemblages |  | | Report (chapter) | | measured. All these data are tabulated elsewhere (Seki and others, 1969), but are summarized graphically...1 2 LOW-GRADE METAMORPHISM IN CALIFORNIA AND JAPAN steeply dipping faults have been recognized in...of the critical assemblage albite + epidote + actinolite ± crossite to blue-green hornblende, garnet,...low-grade mafic schists from Shikoku contain both actinolite and crossite; with increasing grade the blue... Zoned, composite grains commonly exhibit an actinolite or hornblende core armored or replaced by sodic | | SEKI, YOTARO, OKI, YASUE, MATSUDA, TOKIHIKO, MIKAMI, KEIZO, OKUMURA, KIMIO (1969) METAMORPHISM IN THE TANZAWA MOUNTAINS, CENTRAL JAPAN (I) The Journal of the Japanese Association of Mineralogists, Petrologists and Economic Geologists, 61 (1) 1-24 doi:10.2465/ganko1941.61.1 | Journal (article/letter/editorial) | | 岩 石 鉱 物 鉱 研 METAMORPHISM 床 究 IN •@ * SEKI*, KEIZO THE YASUE of Hot Research Spring...Abstract:•@ early Early-middle Pliocene suffered of Japan facies through facies. This the , University... by the basin late and facies to the actinolite of during Miocene central the down-sinking...Mountains, facies occurred volcanic University, Prefecture pumpellyite-prehnite submarine lateral in...誌1969年1月5日 TANZAWA JAPAN MIKAMI**** Department ** 会 報 文 CENTRAL YOTARO 学 Japan amphibolite greenschist | | | Journal (article/letter/editorial) | | TANZAWA MOUNTAINS, CENTRAL JAPAN YOTARO Department of Foundation SEKI Engineering, Saitama University...Spring Research OKI Institute, Kanagawa Prefecture, Odawara ABSTRACT Minerals of wairakite part...also in in between the chlorite zone central Japan. out on indicate reported is found carried...chemical metamorphosed central compo Tertiary Japan, will be Wairakite-Analcime Solid Solutions...wairakite-analcime series in the Tanzawa Mountains, Japan Rocks of the early-middle Miocene Tanzawa group |  | | Journal (article/letter/editorial) | | High-Pressure Schist Belts of New Caledonia and Sanbagawa, Japan R.N. Brothers and K. Yokoyama Department of Geology...glaucophane + epidote + H20 ~ a l b i t e + chlorite + actinolite and the lower pressure Japanese associations...immobile upper plate. Introduction The islands of Japan and New Caledonia occupy identical settings as sialic...1). The lowest grade schists, with pumpellyite-actinolite assemblages, are located on the western (continental)...metamorphic betts, a New Caledonia. b Southwest Japan (MTL, Median Tectonic Line) 1967; Briggs et al. | | | Journal (article/letter/editorial) | | J . Japan. Assoc. Petr. Econ. 78, 11-20, Min. Geol. 1983 K-Ar ages of Sangun metamorphic rocks...rocks in Yamaguchi Prefecture and their geologic significance YUJIRO NISHIMURA Institute of Earth Sciences...Liberal Arts , Yamaguchi University, Yamaguchi 753, Japan. Eizo Department NAKAMURA of Geology, University...Mineralogy, Faculty of Science, Hiroshima Hiroshima 730, Japan. University, K-Ar ages have been determined on...Nishiki-cho and Toyoga-dake areas, Yamaguchi Prefecture. The dates from the Nishiki-cho area are 172 |  | | Journal (article/letter/editorial) | | icrocks in the Kamikita area, northern Honshu, Japan Arsuyuxr lNour Geological Institute, Collegeof Ans...Chiba 260, Japan MrNonu Uuoa. The University Museum, University of Tokyo, Tokyo I 13, Japan Ansrnlcr...volcanoclastic rocks at Kamikita, northern Honshu, Japan, exhibit the effects of an intensive episodeof thermal...+ epidote (Zone IV), and finally to biotite + actinolite (Zone V) with increasingmetamorphic grade. As...diorite intrusive massesat Kamikita, northern Honshu, Japan. Detailed X-ray powder diffraction and microprobe | | | Journal (article/letter/editorial) | | J. Japan. Assoc. Min. Petr. Econ. Geol. 72, 383-393, 1977. UNUSUAL THE PYRALSPITE-UGRANDITE SANBAGAWA...yellowish occurs of some hornblende green; mine=1.652) with rather zoisite minor Subcalcic bluish...near Type III are the following present Actinolite epidote is at a amphibolite definitely...minute EQUATIONS ing The of garnet crossite actinolite-bearing of (1c-1) be oxidized calcic Oxygen...Oxygen the data. The hornblende +8H2O+O2 actinolite. REACTION solution content maximum facies |  | | Journal (article/letter/editorial) | | 464, Japan AND SHOHEI BANNO Department of Earth Sciences, Kanazawa University, Kanazawa 920, Japan SUMMARY...clinozoisite in seventeen specimens from six localities in Japan have been studied with the electron-probe microanalyser...clinozoisite in specimens collected at six localities in Japan (Iratsu, Tonaru, Fujiwara, Nishisonogi, Yoshimi...basis of the antigorite + brucite and epidote + actinolite assemblages. The coexistence of zoisite and clinozoisite...the Nagasaki Prefecture, Kyushu. Metagabbros of this area mainly consist of actinolite, chlorite, ornphacite | | | Journal (article/letter/editorial) | | J. Japan. Assoc. Min. Petr. Econ. Geol. 79, 81-87, 1984 Notes on petrography and rock-forming Relics... Hirosaki University, Hirosaki, Aomori Prefecture 036, Japan Sodic amphibole sparsely occurs as very...relics almost invariably rimmed or included by actinolite in metabasites from the Kuzumaki area, northern...equilibrated assemblages, including chlorite + epidote + actinolite + albite in metabasites, were formed by contact...the presence of sodic amphibole associated with actinolite, epidote, chlorite, muscovite, stilpnomelane | | | Journal (article/letter/editorial) | | complex, Japan HIROFUMI MURAOKA Geothermal Research Department, The Geological Survey of Japan, Higashi...1-3, Yatabe-machi, Tsukuba-gun, Ibaraki-Ken 305, Japan The Ashidachi ultramafic complex, highly serpentinized...pumpellyite grade rocks in the Sangun metamorphic belt, Japan. A number of small gabbroic bodies enclosed in the...enclosed in the serpentinite often contain the actinolite-prehnite-pumpellyite assemblage without calcite...Serpentinite Sheared ranges of pumpellyite-actinolite et a few to several that Chromian in most |
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