Mining geology最新文献_第2页

Hydrogen isotopic ratios of the ore-forming fluids responsible for the Kaneuchi and Ohtani tungsten deposits, Kyoto Prefecture: Involvement of magmatic fluid and organic water in the ore-forming fluids. 京都金内钨矿床和大谷钨矿床成矿流体氢同位素比值:岩浆流体和有机水在成矿流体中的作用

Mining geology Pub Date : 1996-10-31 DOI: 10.11456/SHIGENCHISHITSU1992.46.255

Y. Shibue, M. Kusakabe

引用次数: 0

Worldwide distribution of submarine hydrothermal deposits and their classification 海底热液矿床的全球分布及其分类

Mining geology Pub Date : 1996-06-30 DOI: 10.11456/SHIGENCHISHITSU1992.46.167

Y. Shiga

引用次数: 1

Metal-rich sludgy sediments deposited in the Seikan Undersea Tunnel 精干海底隧道沉积的富金属泥质沉积物

Mining geology Pub Date : 1995-12-31 DOI: 10.11456/SHIGENCHISHITSU1992.45.391

M. Mizukami, Kouichi Kato, S. Ohmori

引用次数: 3

History of post-intrusive hydrothermal systems indicated by fluid inclusions occuring in the young granitic rocks at the Kakkonda and Nyuto geothermal systems Kakkonda和nyyuto地热系统年轻花岗岩中流体包裹体所指示的后侵入期热液系统历史

Mining geology Pub Date : 1995-10-31 DOI: 10.11456/SHIGENCHISHITSU1992.45.303

M. Sasaki, M. Sasada, K. Fujimoto, Y. Muramatsu, Ryo Komatsu, T. Sawaki

引用次数: 4

Synnyrites-New Complex Alumina-Potassic Raw Material 合胞体——新型复配铝钾原料

Mining geology Pub Date : 1995-08-31 DOI: 10.11456/SHIGENCHISHITSU1992.45.223

L. Panina, V. Sharygin, Igor Proshenkin

{"title":"Synnyrites-New Complex Alumina-Potassic Raw Material","authors":"L. Panina, V. Sharygin, Igor Proshenkin","doi":"10.11456/SHIGENCHISHITSU1992.45.223","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1992.45.223","url":null,"abstract":"The paper is devoted to synnyrites-a high alumina-potassic (17-21% K2O, 22-24% Al2O3) silicate raw material, the main resources of which are concentrated in Siberia and territorially confined to the Baikal-Amur railway. Synnyrites consist of K-feldspar (65-75 vol.%), kalsilite (15-25%), nepheline (up to 10%) and ferromagnesian minerals (biotite, some -times, garnet and pyroxene, 1-5%). Kalsilite and K-feldspar are in maximum potassic. Nepheline contains up to 25-35mol.% of kalsilite mineral; mica is to magnesian (100MgO/MgO+FeO>25 mol.%) low-titanian biotite. Garnet corresponds to low alumina melanite. Pyroxene is a member of isomorphic series of diopside-hedenbergite-aegirine. Salic minerals are mainly present as symplectic intergrowths (dactilotypic, poikilitic, pseudoleucite texture), seldom as individual idiomorphic grains. Large synnyritiferous plutons were formed in Paleozoic and Mesozoic ages during tectono-magmatic activity of older consolidated blocks of the Earth's crust within Baikal-Stanovoy rifting system where potassic alkaline-basaltoid magmatism is widespread. The plutons are large layered ethmoliths. They are made up of two differentiated series : lower melano-, meso cratic series composed of mica pyroxenites, shonkinites, pulaskites and upper leucocratic series represented by nepheline and pseudoleucite syenites, synnyrites. Synnyrites are mainly concentrated in apical and upper of the layered plutons. From the bottom to the top, of the plutons the amounts of K2O, Al2O3 and SiO2 increase and the ferromangnesian mineral contents decrease in the rocks. The formation of synnyrite-bearing plutons is the result of slow crystallization of an initial alkaline-basaltoid melt at a substantial depth and widely manifested processes of intrachamber differentiation and fractionation. It is supposed that synnyrites were formed due to segregation of leucite in the top of magmatic chamber and further transformation of leucite into kalsilite and K-feldspar. A few methods of using and processing synnyrites are suggested : 1) after mechanical enrichment, the ore may be used as chlorine-free low-concentrated potassic fertilizer for a long time ; 2) low-fer-riferous K-feldspar and kalsilite concen -trates, potassic alum may be obtained from synnyrites by mechanical enrichment, flotation or acidic decomposition; 3) high concentrated chlorine-free potassic fertilizers, alumina, fine dispersed silica and others may be produced from synnyrites by deep chemical processing with virtually no wastes. Introduction Synnyrites were firstly found by A. Ya. ZHIDKOV (1962,1963) within the Synnyr alkaline massif in northern Baikalian region. These unique intrusive rock-ores are composed mainly of sym plectic K-feldspar-kalsilite intergrowths and are characterized by a very high alkali content at very low Na2O / K2O. ratio (1:12 in the average). The synnyrite varieties of highest quality contain (in wt.%) up to 17-20 K2O, 22-24 Al2O3, 56-58 SiO2. At present four sy","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1995-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132589744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Oxygen Isotopic Alteration of Nohi Rhyolites Nohi流纹岩的氧同位素蚀变

Mining geology Pub Date : 1995-04-28 DOI: 10.11456/SHIGENCHISHITSU1992.45.85

H. Shimazaki, M. Kusakabe

引用次数: 3

Biogeochemistry, Biogeophysics, Geophysics, and Geoarchaeology Complexing in Exploration for Blind Ore Deposits 生物地球化学、生物地球物理学、地球物理学和地质考古学在找矿中的应用

Mining geology Pub Date : 1994-12-31 DOI: 10.11456/SHIGENCHISHITSU1992.44.429

A. Kovalevskii, Michail A. Nefedev, Will E. Landa

引用次数: 0

Effects of phosphate ions on dissolution rate of calcite 磷酸盐离子对方解石溶解速率的影响

Mining geology Pub Date : 1994-10-31 DOI: 10.11456/SHIGENCHISHITSU1992.44.331

H. Kamimura, Y. Niibori, T. Chida