 | | Journal (article/letter/editorial) | | Characteristics of SkarnDepositsandRelated Acid Magmatismin Japan HIDEHIKO SHIMAZAKI Abstract Most Japanese skarn...granitic rocks in Japan have been subdividedinto a magnetite-bearingand a magnetite-freeor ilmenite series...is usually found in the depositsassociatedwith magnetite-bearinggranitoids,whereasplagioclase-clinopyroxene...Auriferous skarn deposits tend to be associated with magnetite-bearing granitoids. These facts reveal a correlation...graniticrocks, tiary; the outer zone of southwestern Japan, Miocene; papersby Ishiharaand his colleagues are |  | | 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) | | 1983 ) , as a result of careful measurements of magnetite solubility by SWEETONand BAES (1970) and TREMAINEand...some detail by SIMONETTI and MCCLURE (1979) and HIRAKO and QNAKA (1982). The degree of association of...neutral aqueous and gaseous species. Solubility of Magnetite and Hematite FeCp -- Fe’+ ------ FeOH+ muscovite...concentration in fluids in equilibrium with hematite + magnetite and one of the acidity buffers (23) and (24),...concentration and temperature. The solubility of magnetite + hematite is very sensitive to chloride concentration |  | | Journal (issue) | | HyS EM Flanigen/Quintessa/Linde/USA Adachi Shin/Japan Regency/Vacuum Ventures/USA HyS 1988 Aquamarine...Sapphire, colourless tubes, etc. Bijoreve/Seiko/Japan 1983 Ruby, etc. (NC) Union Carbide/USA and others...where found in large deposits, such as in the copper mine at Rio Tinto in south-western Spain, it is still...crystals also occur in Peru, Bolivia, Chile, Brazil, Japan and Mexico. 'Sand dollars' are particularly known... Previously, research laboratories in the USA, Japan, Russia, China and France have reported their experimental |  | | Journal (issue) | | discovered in 1917 the deep blue beryls from the Maxixe mine in Brazil have been a source of fascination both...zircon (red-brown and colourless transparent), magnetite, hematite, rutile, pyrite and quartz (originating...reported most occurrences worldwide, e.g. Belmont Mine / MG Capoeirana-Nova Era / MG Taua/CE Carnafba /...Australia Boldyrevite not reported Ralstonite Belmont Mine / MG, Brazil (?) Souza, 1988 Monazite Habachtal...Manyara, Tanzania; 8 = 'South Africa'; 9 = Cobra Mine, South Africa 134 J. Gemm., 1996, 25, 2 (1) |  | | Book (edition) | | amethyst, which are now produced in Russia and Japan on a commercial scale. Alteration in the colour...First Edition For two decades, an earlier work of mine – Practical Gemmology – has proved a useful elementary...Finally, the pictures of the pearl cultivation in Japan were supplied by Shell Photographic Unit and the...groundmass of pale brown glass and tiny grains of magnetite. Island of Mull, Scotland igneous rocks was based...quartz (clear), feldspar (pale brown, ‘dusty’) and magnetite (black). Field of view: 4 mm across. St Kilda |
|
