 | Watanabe, Makoto, Nishido, Hirotsugu, Moriwaki, Hisamitsu, Higashimoto, Sadao, Kubota, Yoshinori (1988) K-Ar ages of skarn deposits in the inner zone of southwestern Japan. GEOCHEMICAL JOURNAL, 22 (5) 231-236 doi:10.2343/geochemj.22.231 | Journal (article/letter/editorial) | | Inner Zone of skarn deposits of southwestern Japan MAKOTO WATANABE1, HIROTSUGU NISHID02*, HISAMITSU...Geology Iwakuni Geology Branch, and Mineralogy, Department, Metal Mining Geological and Kuga mine, Hiroshima...Zealand2, Agency of Japan, Iwakuni, Yamaguchi 7403, Survey Hiroshima of Japan, Mikawa-cho, University...Hiroshima Yamaguchi (Received July 2, 1988; Accepted 7304, 740-045, January 30, Japan 1989) Using...hornblende from the Ushirodani Cu-Zn skarns, Tottori Prefecture (60.7 ± 3.1, 60.8 ± 1.9 Ma); muscovite from the |  | | Journal (article/letter/editorial) | | SATO Geological Surveyof Japan,Yatal>e-Higashi 1-1-3,Tsukuba, Ibaraki305,Japan Abstract The Fujigatanitungsten...smallamountsof interstitialsulfidemineralssuchas pyrrhotite. The plagioclase-muscovite-chlorite rock, characterized...than the pyrrhotite-pyrite-magnetite buffer, and sulfur fugacity was at or below the pyrrhotite-pyriteboundary...skarn depositsin Japan are divided into two types: a scheelitetype, including the Fujigatani deposit,and a...rocks, respectively. The reducednature of the Fujigatani deposit was presumablygeneticallyconnectedwith |  | | Journal (article/letter/editorial) | | J. Japan. Assoc. Min. Petr. Econ. Geol. 74, 357-375, 1979. MINERALOGICAL STUDY ON THE WOLFRAMITE SERIES...SERIES FROM THE CHUGOKU DISTRICT , SOUTHWEST JAPAN (I) RELATIONSHIPS BETWEEN AND LATTICE CHEMICAL ...Science , Hiroshima University, Hiroshima, 730, Japan In the Chugoku the Late around mineralogical...b0, occurrence Fe/Mn natural unit influence mine a0, compositional rare the substitution of... parameters exception the of the lattice Japan, Early and relationship the with in the |  | | Journal (article/letter/editorial) | | SkarnDepositsin Japan TAKANORI NAKANO, Instituteof Geoscience, Universityof Tsukuba,Ibaraki305, Japan HIDEHIKO...Tokyo113,Japan AND MASAAKI SHIMIZU UniversityMuseum,Universityof Tokyo,Hongo,Tokyo113, Japan Abstract...singleminescale.On the otherhand,skarns from78 oredeposits in Japan revealregionalvariationsin the 87Sr/8aSr ratiorangingfrom0...Introduction 0361-0128/90/1069/794-2253.00 794 JAPAN: SrISOTOPE COMPOSITION OFSKARNS 795 exoskarn,...zoneof southwestern Japan,(KA) -- Kanto,KT = Kitakami,OSW= Outerzoneof southwestern Japan,(WCH) -- westernChugoku;ISTL |  | | Journal (article/letter/editorial) | | Characteristics of SkarnDepositsandRelated Acid Magmatismin Japan HIDEHIKO SHIMAZAKI Abstract Most Japanese skarn...Cretaceousor Miocene age. The granitic rocks in Japan have been subdividedinto a magnetite-bearingand...graniticrocks, tiary; the outer zone of southwestern Japan, Miocene; papersby Ishiharaand his colleagues are...bulk chemicalcompositionexcept for ferric/ferrous Japan. As shownin the figure, eachgranitic belt ratios...rocks recognizedin the Lachlan fold belt of south- Japan. Granitic rocks in the western end of the belt (H |  | | Journal (article/letter/editorial) | | ns in AcidicIgneousRocks fromSomeMiningAreasin Japan SUKUNE TAKENOUCHI AND HIDEKI IMAI Abstract Glassand...rhyolites,porphyries,and granitesfrom mining areas in Japan were investigated. Rhyolites contain various types...someporphyriesand rhyogranitic rocks from the Ohtani, Fujigatani, and lites in the vicinityof ore depositsare...a boring core drilled at the lowest level of the mine were investi- gated. They belongmostlyto type 2...porphyry occursas a stock in deeperparts of the mine. Manyof theglassinclusions in quartzphenocrysts |  | | Journal (article/letter/editorial) | | magnetite-series ilmenite-series granitoids in Japan SHUNSO ISHIHARAI and SHIGERU TERASHIMA2 Government...983' and Geological Survey of Japan, Higashi 1-1-3, Tsukuba, 3052, Japan (Received March 23, 1989; Accepted...Sanin Belt, Hidaka Belt, Outer Zone of Southwest Japan and Green Tuff Belt, were analyzed for total and...sulfur (a34SCDT =-4.4 -6.7%o) of the nickeliferous pyrrhotite ore from the same ore deposit had an external...(Ryoke, Sanyo, Hidaka and Outer Zone of Southwest Japan) granitic ter ranes. The total number of the samples |  | | Journal (article/letter/editorial) | | Paragenesisof the Huanzala Mine, Central Peru HIDEKI IMAI, MASASHI KAWASAKI, MITSUO YAMAGUCHI, AND MIKIO TAKAHASHI...SaitamaPrefecture,Japan362 Abstract The Huanzala mine is a zinc and lead mineral deposit found in the...are, from bottom to top, chert (Chimu THE Huanzala mine is situated in central Peru, about Formation), ...north-northwest-trending (Fig. •). pany, Ltd. In 1981, the mine produced900 metric The Huanzala deposit occursin...porphyrywasintrudedinto the Chimu Formationjust to the east of the mine (Fig. 1). The absoluteage of the granodioriteporphyry |  | | Journal (article/letter/editorial) | | University of Tsukuba, Sakura-mura, Ibaraki 3053, Japan. 1986; (Received July 30, Accepted November ...fluids responsible for major skarn deposits in Japan, using the isotopic data on skarn calcites INTRODUCTION...Inner Zone of southwestern Japan, and OSW: Outer Zone of southwestern Japan. TTL: Tanagura tectonic line...calcitesfrom Japanese skarn deposits 613c%o(PDB) Name of mine N Mean Range Kitakami and Abukuma Regions (130 ^...(Yamato) 20 Yoshiwara 21 Tsumo 22 Sasagatani 23 Fujigatani 24 Kuga 3 8 5 11 5 9 4 6 6 7 6 6 -5.42 -5.42 |  | OGATA, Takeyuki, ISHIYAMA, Daizo, MIZUTA, Toshio, NAKASHIMA, Kazuo (2002) Coexistence of a Fluid Phase with Granitic Magma: Geochemical Characteristics of REE and Cu in Miyako Granite and in Scheelite-bearing Aplitic Veins at the Yamaguchi Cu-W Skarn Deposit, Iwate, Japan. Resource Geology, 52 (2) 173-186 doi:10.1111/j.1751-3928.2002.tb00129.x | Journal (article/letter/editorial) | | Scheelite-bearing Aplitic Veins at the Yamaguchi Cu-W Skarn Deposit, Iwate, Japan Takeyuki OGATA, Daizo ISHIYAMA...Resources Science, Akita University, Akita 010-8502, Japan [e-mail: takeyuki_ogata@galena.mine.akita-u.ac.jp]...Science, Yamagata University, Yamagata 990-8560, Japan Received on October 9, 2001; accepted on March 22...located in the Northern Kitakami belt, Northeast Japan. The formation of the scheelite-chalcopyrite-magnetite-bearing...and scheelite-chalcopyrite-magnetite-bearing Yamaguchi skarn deposit was closely associated with the |  | | 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 |  | | Book | | G - EOLOGICAL OF THE MINERI IN JAPAN AND Hideki Imai t z0 ::a:: 0 0 � I ( CRYSTALS NOT PISTOLS...STUDIES OF THE MINERAL DEPOSITS'( GEOLOGICAL lN JAPAN AND EAST ASIA ,,.. I -I �1n .. o� ;.,. "W...GEOLOGICAL STUDIES OF THE MINERAL DEP OSITS IN JAPAN AND EAST ASIA Hideki Imai UNIVERSITY OF TOKYO PRESS...TOKYO PRESS, 1978 UTP 3044-687 59-5 I 49 Printed in Japan All rights reserved. No part of this publication...During these 40 years, I studied the ore deposits in Japan and East Asia from the geological and mineralogical |  | | Journal (article/letter/editorial) | | Strata-Bound Scheelite Skarns in the Riba de Alva Mine, Northeastern Portugal L. MIGUEL GASPAR† Departamento...metasediment-hosted distal scheelite skarns from the Riba de Alva mine, Barca de Alva-Escalhão region, northeastern Portugal...1997; Gaspar and Inverno, 1998a) in the Riba de Alva mine, northern Portugal, one of the scheelite-mineralized...discovery of mineralization dates back to 1948 and the mine workings, both on the surface and underground, were...from 1951 to 1978, with MIRAL and METAMERQUE as mine operators. According to the last report (METAMERQUE |  | | Book | | Tertiary skarns are known (e.g. in Malaysia and Japan) but such regions are rare. Rundkvist suggests that...syngenetic base metal deposits (e.g. Kuroko-type, Japan). (f) Similar to (e) except that transport and...metals occurring in deposits related to them in Japan (after Ishihara, 1980). some skarns, depending...related epigenetic deposits with granite types in Japan show that all the Sn and most of the W produced...Discordant replacement of bedded marble (M) by pyrrhotite (P) and chlorite (black areas). Doradilla deposit |  | | Journal (article/letter/editorial) | | Geological Survey of Japan, Higashi 1-1-1 Central 7, Tsukuba, Ibaraki 305-8567, Japan [e-mail: sato.gsj@aist...different between central Sikhote-Alin and Northeast Japan; reduced-type and oxidized-type, respectively. The...were closer together before the opening of the Japan Sea in the Miocene, may have been juxtaposed under...complex, plate reorganization, Kitakami, Northeast Japan 2. Outline of Geology 1. Introduction 2.1. Regional...Cenozoic time, but were separated by opening of the Japan Sea in the Miocene. The two regions consist mainly |  | | Journal (article/letter/editorial) | | red aluminousor Canada,the UnitedStates,Mexico,Japan,and Korea siliceousrocks,suchas thoseat Cantung(Dick...Copper Zinc-lead Shinyamadeposit, Kamaishimine, NE Japan Pine Creek, California MacMillan Pass (Mactung)... Canada Sasanodeposit Yoshiokamine, SW Japan Victoria mine, Nevada DouglasHill and CastingCopper mines(Yerington...(numbers refer to localities on Fig. 1) 1. Empire mine, B.C., Canada (Sangster, 1969;Haug, 1976) 2. Larap...Strawberry mine, California (Nokleberg, 1981) 5. Sangdong, Korea(John, 196•) 6. Fujigantani,SW Japan(Sato |  | Elongo, V, Lecumberri-Sanchez, P, Legros, H, Falck, H, Adlakha, E, Roy-Garand, A (2020) Paragenetic constraints on the Cantung, Mactung and Lened tungsten skarn deposits, Canada: Implications for grade distribution. Ore Geology Reviews, 125. 103677pp. doi:10.1016/j.oregeorev.2020.103677 | Journal (article/letter/editorial) | | garnet + hedenbergite-rich pyroxene + abundant pyrrhotite), which is 16 characteristic of high-grade...anticline plunging to the NE and intruded by the Mine 107 Stock, a peraluminous S-type medium-grained...monzogranite (Mathieson and Clark, 1984; 108 Fig. 2). The Mine Stock (101.15 ± 0.44 to 98.2 ± 0.4 Ma from U-Pb...albite (Na), Itrongay sanidine (K), and Navegadora Mine spessartine-almandine (Mn). 174 For Ba-bearing...minerals (Fig. 7F). Late garnet veinlets (garnet-pyrrhotite-calcite for Mactung) crosscut 229 the garnet-pyroxene |  | Zürcher, Lukas, Ruiz, Joaquín, Barton, Mark D. (2001) Paragenesis, Elemental Distribution, and Stable Isotopes at the Peña Colorada Iron Skarn, Colima, Mexico. Economic Geology, 96 (3) 535-557 doi:10.2113/gsecongeo.96.3.535 | Journal (article/letter/editorial) | | diorite-carbonate contact in the western sector of the mine. High Ti magnetite from this zone contrasts with...veins with wide kaolinite alteration halos. In the mine area, aplitic dikes related to this intrusive event...Puerto Vallarta batholith and the El Encino iron mine areas (PantojaAlor, 1983). Sierra El Mamey, the...Peña Colorada is approximately 750 m thick. The mine-scale geologic map and 536 537 PEÑA COLORADA...volcaniclastic unit Building FIG. 2. a. Peña Colorada mine-scale geology, alteration, and mineralization. |  | | Journal (article/letter/editorial) | | sulphides in the skarn include arsenopyrite and pyrrhotite with lesser amounts of chalcopyrite, galena,...fugacity which decreases with time from the pyrite-pyrrhotite-magnetite towards the QFM buffer. Available data...intermediate composition (Boyle 1979; Meiner 1989). In Japan, gold is preferentially concentrated in the epidote-rich...Mountains, Yukon, and those mined at the Nickel Plate Mine, British Columbia (Lamb et al. 1957) with an average...series. Geological setting The hedenbergite and pyrrhotite skarns are situated along the SW contact of the |  | | Journal (article/letter/editorial) | | apatite, titanite, quartz, and sulfides, mainly pyrrhotite. The first substage skarn formed from a complex...out the initial exploration. During the Los Santos mine feasibility study, over 10,000 m of trenches and...Orthoclase Pargasite Pavonite Phlogopite Pyrite Pyrope Pyrrhotite Prehnite Quartz Rutile Salite Scheelite Sillimanite...rocks. The D facies has only been identified at mine scale and outcrops as small, irregular meter-sized...identified in the underground workings of the Los Santos mine (Fig. 4A). This pegmatitic zone contains arborescent |  | | Journal (article/letter/editorial) | | Layeredcalc-silicate Fe facies,typifiedby quartzskarnwith minor pyrrhotite, has replaced biotite hornfels as envelopesaround...massive garnetskarn(unit6a)passes easterlythrough pyrrhotite, and rare magnetiteform coarsedissemmassivepyroxeneskarn(unit...for ironporphyrydikes.Minorfinelydisseminated pyrrhotite bearing rocksat McDame. andpyrite occurin quartzskarns... L 4 4 1 L Massive sulfide facies(MSF) pyrrhotite skarn (YS) sphaleriteskarn (HS) 4 3 L 4 ...The massivesulfide facies generally consistsof pyrrhotite skarnwith the mineral assemblage pyrrhotite_ |  | | Journal (article/letter/editorial) | | Dal'niy [31], 28) Lermontov, 29) Salau [38], 30) Fujigatani [37], 31) Rigovdarya (Ikar) [N. V. Skorobogatova]...group of igneous rocks. Their main sulfides are pyrrhotite, chalcopyrite, and arsenopyrite; sphalerite and...Kohei, 1980, Tungsten skarn deposit of Fujigatani mine, Southwest Japan: Economic Geology, Vol. 75, pp. 1066-1082 |  | Zahedi, Azam, Boomeri, Mohammad, Nakashima, Kazuo, Mackizadeh, Mohammad Ali, Ban, Masao, Lentz, David R. (2014) Geochemical Characteristics, Origin, and Evolution of Ore-Forming Fluids of the Khut Copper Skarn Deposit, West of Yazd in Central Iran. Resource Geology, 64 (3) 209-232 doi:10.1111/rge.12037 | Journal (article/letter/editorial) | | Environmental Sciences, Yamagata University, Yamagata, Japan, 3Department of Geology, Faculty of Sciences, University...deposit is located at about 50 km northwest of Taft City in Yazd province in the middle part of the Urumieh-Dokhtar...1 to 21.1 wt% NaCl equivalent, respectively. Pyrrhotite precipitation started during this stage. (iii)...University, 1-4-12 Kojirakawa-machi, Yamagata 990-8560, Japan. Email: nakashi@sci.kj.yamagata-u.ac.jp © 2014 The...about 120,000 tons at 1 to 10% Cu in one part of the mine (Khoie et al., 1999). Other skarn deposits in the |  | | Journal (article/letter/editorial) | | 80 percent sulfides (pyrrhotite >> pyrite + chalcopyrite). The massive pyrrhotite-bearing mineralization...(actinolite)-calcite-quartz (stage II) and chlorite-pyrrhotite-pyrite (stage III) assemblages. Stage III mineralization...This skarn zone occurs close to the Ayazma Cu-Au mine. Eurogold Corporation undertook geochemical surveys...subordinate or accessory minerals Magnetite, pyrrhotite, and chalcopyrite This study Alteration minerals...al. (2004) Magnetite, chalcopyrite, pyrite, pyrrhotite, bornite, galena, sphalerite, bismuth, bismuthinite |  | | Journal (article/letter/editorial) | | Science, Tohoku University, Aoba-ku, Sendai 980-8578, Japan [e-mail: mohamed_elrhazi@hotmail.com] Received on...range is located ~30 km southwest of Nador, a rising city that faces the Mediterranean Sea (Fig. 1). The geology...Setolazar, Axsara, Wiksane, and Bokkoya open pits, and mine data is summarized as follows. Two layers of magnetite...very small in all open pits at the Beni Bou Ifrour mine. Calc-silicate minerals are completely absent in...Sulfide minerals such as pyrite, chalcopyrite, pyrrhotite, and hydrous minerals, including phlogopite and |
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