 | | Journal (article/letter/editorial) | | SATO Geological Surveyof Japan,Yatal>e-Higashi 1-1-3,Tsukuba, Ibaraki305,Japan Abstract The Fujigatanitungsten...interstitialsulfidemineralssuchas pyrrhotite. The plagioclase-muscovite-chlorite rock, characterized by a higher...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...by tungstenmineralization in Japan(Sato, 1977b). TIlE Fujigatani mine is locatedin the Kuga district |  | | 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 |  | 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) | | 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...having a low pistacitic component (5–13% Ps). Plagioclase compositions grade from anorthite in pyroxene...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 |  | Vlasova, D. K., Podlesskiy, K. V., Kudrya, P. F., Boronikhin, V. A., Muravitskaya, G. N. (1985) ZONING IN GARNETS FROM SKARN DEPOSITS. International Geology Review, 27 (4) 465-482 doi:10.1080/00206818509466434 | Journal (article/letter/editorial) | | hedenbergite, ido) idocrase, or) orthoclase, pfs) plagioclase feldspar, ph) phlogopite, px) pyroxene, sal)... (C3-P1) Granites (C3) Kuga (Japan) Fujigatani (Japan) Kagata (Japan) Kuru-Tegerek (Middle Asia) Granites...skarn-scheelite deposits of Japan. 1) Ingichke, 2) Lyangar, 3) Maykhura, 4) deposits of Japan. deposits of Middle...Middle Asia (USSR) and Japan. Table 3 presents the chemical analyses of type II zoned garnets. The pattern...greater than for CaO and SiO2 . of almandine (Fujigatani) in the outer zones of the crystals. Scanning |  | | Journal (article/letter/editorial) | | study of the Kamioka Zn-Pb skarn deposits, Central Japan H. Shimazaki 1 and M. Kusakabe 2 1 Geological Institute...Science, University of Tokyo, Hongo, Tokyo 113, Japan 2 Institute for Study of the Earth's Interior, Okayarna...Okayarna University, Misasa, Tottori Prefecture 682-02, Japan The Kamioka Zn-Pb deposits consist of...Kamioka Zn-Pb mine is located near the town of Kamioka in Gifu Prefecture, central Japan. The deposits...Hida mar- ginal belt. Jurassic granitic rocks in Japan are exposed only in the Hida region, and the region |  | | Journal (article/letter/editorial) | | deposit in Inner Mongolia, China. In the Huanggang mine, Nos. 1 to 4 Fe ore bodies are arranged along a...kilometers northeast of the Sn Ore Body of the Huanggang mine, has also been studied for comparison, and the results...50 km west of Linxi Town (Fig. 1). The Huanggang mine, operated at present by Inner Mongolia Huanggang...address: Kagoshima University, Kagoshima 8900065, Japan 1 With additional position at Beijing Institute...II zone and Sn O.B. at Skarn No. III zone in the mine were investigated, along with the Sumugou base-metal |  | | Journal (article/letter/editorial) | | Petrogenesis of theCopper-Bearing Skarnat theMasonValley Mine, YeringtonDistrict,Nevada MARCO T. EINAUDI Abstract...Abstract Skarn formation at the Mason Valley mine occurred at a depth of 2,000 m on the outer fringe of...garnet, pyroxene, and amphibole. The MasonValley mine (MVM) is ideallysuited is a small copper-bearingskarn...400 ft. The 300 and mentary and volcanicrocks. 400 mine levels were mapped on the scale 1 in. = 40 ft. Normal...SKARN, Jgd_• MASON VALLEY SKARN NEVADA LEVEL MINE 400 I M I00 •. TERTIARY JURASSIC 771 Rhyolite |  | | 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... — MOLYBDENITE — AMPHIBOLE — EPIDOTE — PLAGIOCLASE — MAGNETITE — SPHENE — MICA — QUARTZ |  | | 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) | | 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 |  | 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) | | disseminations. Metasomatic pyroxene, garnet, and plagioclase cut the early metamorphic event preferentially...Albitization of preexisting protoliths modified igneous plagioclase compositions from Ab67An32Or1 up to Ab96An3Or1...deposited contemporaneously with metasomatic plagioclase, forming a shallow-dipping replacement body after...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 |  | | Journal (article/letter/editorial) | | Dal'niy [31], 28) Lermontov, 29) Salau [38], 30) Fujigatani [37], 31) Rigovdarya (Ikar) [N. V. Skorobogatova]...the con tents of light minerals: K-feldspar, plagioclase and quartz, and also their sums. A very high...emphasize the predominance of K-feldspar or plagioclase, respectively. To delimit the rocks of a series...Kohei, 1980, Tungsten skarn deposit of Fujigatani mine, Southwest Japan: Economic Geology, Vol. 75, pp. 1066-1082 |  | 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) | | 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...biotite, quartz, apatite, sulfides, and rare plagioclase. 292 This facies contains a significant proportion...calcite, clinozoisite, 314 chlorite, and rare plagioclase occur in all facies as anhedral overgrowths (Fig |  | | Journal (article/letter/editorial) | | possible to recognize an endoskarn of calcic plagioclase and clinopyroxene developed over aplitic granite...out the initial exploration. During the Los Santos mine feasibility study, over 10,000 m of trenches and...end-member proportions for clinopyroxene, garnet, plagioclase, and minerals of the epidote group were calculated...muscovite and biotite (Essene, 1989); K-feldspar, plagioclase, garnet, and clinopyroxene (Spear, 1993); cordierite...rocks. The D facies has only been identified at mine scale and outcrops as small, irregular meter-sized |  | | Journal (article/letter/editorial) | | University of Tsukuba, Tsukuba-shi, Ibaraki305,Japan TAKASHI YOSHINO, Instituteof Technology, University...University of Tsukuba, Tsukuba-shi, Ibaraki305,Japan HIDEHIKO SHIMAZAKI, Geological Institute,Facultyof Science...Tokyo113,Japan AND MASAAKI SHIMIZU University Museum,University of Tokyo,Hongo,Tokyo113,Japan Abstract...whicharebasicallyiden- the pyroxenefrom the TsudaFe mine, which contical to the Cu (andFe), Zn-Pb, oxidizedW...Pb-Zb ß W-Sn- 1569 I F '• W-Mo-Cu ß J-Fe SEA JAPAN 0 42 ß 9 300km I 14, FIG. l. Localitymapof |  | | 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... Quartz, plagioclase, hornblende, and biotite are the prin- cipal phenocrysts. Plagioclase occupies |  | | Journal (article/letter/editorial) | | containing GS + QZ: 2wo + AN. (1) pyroxene-and plagioclase-bearing zones.Talc skarn (unit 6i) hasreplac...Pyroxene (PX) Epidote (EP) Amphibole (AM) Plagioclase (PL) Chloritc (CL) Talc (TA) 5 3 L 1 L..._+amphibole +_epidote _+pyroxene+_garnet +__ plagioclase +__ chlorite _+sphene(Table 2). Within 10 m of...sphalerite,galena,andchalcopyrite in tungstendepositsof Japan,includingKagatamine 9, group 4: •34S= 8.4), and...-4.6), Kugamine (-9.2 to -8.3), mine(-12.2 to -6.9), andKiwada mine mixed magmaticand formationalore |  | | Journal (article/letter/editorial) | | exoskarn are composed of hedenbergite (Hd96Joh4)–plagioclase (An55–64) and hedenbergite (Hd61–94Joh4–7), accompanied...cordierite + biotite + muscovite + K-feldspar + plagioclase at the contact between plutonic and regional... The hornblende-Al barometer and hornblende-plagioclase geothermometric calculations on the magnetite...Hipidiomorphic granular texture; (b) pyroxene and plagioclase; (c) pyroxene is replaced by amphibole; (d) scheelite...bio: biotite, Cc: calcite, ep:epidote, plg: plagioclase, prx: pyroxene, sch: scheelite, ve: vesuvianite |  | | Report (issue) | | (1979). Probe analyses (1) from Broken Hill gold mine, Coromandel , New Zealand. ACANTHITE. Nikolaeva...(1979). Probe analyses (4) from Broken Hill gold mine, Coromandel, New Zealand. AGUILARITE. Sugaki et... Probe analysis, x-ray data from Sanru mine, Hokkaido, Japan. AGUILARITE. Sugaki et al., J. Jpn. Assoc...65-77 (1982). Microprobe analyses (5) from Sanru mine, Hokkaido. AGUILARITE. Vassalo Morales and Borodaev...Probe analysis, optics, x-ray data from Yamaguchi Pref., Japan. AIKINITE. Nakashima et al., J. Jpn. Assoc |  | | Journal (article/letter/editorial) | | This skarn zone occurs close to the Ayazma Cu-Au mine. Eurogold Corporation undertook geochemical surveys... 2005). The exoskarn is weakly zoned, with plagioclase, scapolite, and sphene, close to marble front...B. Replacement of primary igneous minerals (plagioclase) by garnet (CPL). C. Garnet showing oscillatory...= epidote, Grt = garnet, Qtz = quartz, Pl = plagioclase, Px = pyroxene. is the most abundant sulfide...Rebbert, C.R., and Rice, J.M., 1997, Scapolite-plagioclase exchange: Cl-CO3 scapolite solution chemistry |  | | Journal (article/letter/editorial) | | diopside-clinozoisite, fine clinozoisitediopside and amphibole-plagioclase. The bulk compositions of the zones, calculated...increase in pargasitic amphibole and anorthitic plagioclase and small amounts of K-feldspar. Clinozoisite...amphibole-biotite intergrowths are observed. The amount of plagioclase decreases into the pelite, the amount of K-feldspar...used as a standard for the Na, K analysis of plagioclase, alkali feldspar, amphibole, biotite. Data reduction...-i Garnet * All iron as FeO. 20-K4 CD-A Plagioclase 21-K4 A 11-J6 19-K4 center A-P A 46-92 |  | | Journal (article/letter/editorial) | | diopside-clinozoisite, fine clinozoisitediopside and amphibole-plagioclase. The bulk compositions of the zones, calculated...increase in pargasitic amphibole and anorthitic plagioclase and small amounts of K-feldspar. Clinozoisite...amphibole-biotite intergrowths are observed. The amount of plagioclase decreases into the pelite, the amount of K-feldspar...used as a standard for the Na, K analysis of plagioclase, alkali feldspar, amphibole, biotite. Data reduction...mole per cent H2O for correction procedure. Plagioclase 54-45 00 24-90 003 008 0-02 20-28 0-03 1-75 |  | | Journal (article/letter/editorial) | | more than 100 points, are 6–15% quartz, 24–43% plagioclase, 20–48% K-feldspar (commonly pink), 0–10% hornblende...have led to alteration of pyroxene, garnet, plagioclase, and alkali feldspar, leading to chloritization...Geology of the Mazraeh skarn deposit At the Mazraeh mine, the Cretaceous sedimentary and metavolcanic rocks...Endoskarn: 1) plagioclase-alkali feldspar–magnetite–epidote skarn; 2) epidote–plagioclase–biotite skarn;...skarn; and 3) garnet–plagioclase–pyroxene skarn. Fig. 3. Geological map of Mazraeh mine (modified after Haj |
|
