Mining geology最新文献

{"title":"Gold-silver-bearing lead-zinc veins and their mineral parageneses of the Kato mine, Fukuoka Prefecture","authors":"T. Ueno, N. Shimada, Takayuki Yamabe, Hiroaki Nakazono, Shin-ichiro Hakusan","doi":"10.11456/SHIGENCHISHITSU1951.40.175","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.175","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124997011","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}

{"title":"Wall rock alteration in the Hishikari gold mine","authors":"K. Ibaraki, Ryoichi Suzuki","doi":"10.11456/SHIGENCHISHITSU1951.40.97","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.97","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127096946","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}

{"title":"Hydrothermal deposits at the central spteading axis of the North Fiji Basin(SW Pacific)","authors":"T. Urabe, J. Auzende, C. Deplus, J. Eissen, D. Grimaud, P. Huchon, J. Ishibashi, M. Joshima, Y. Lagabrielle, C. Mével, J. Naka, E. Ruellan, Takeo Tanaka, M. Tanahashi","doi":"10.11456/SHIGENCHISHITSU1951.40.117","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.117","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122920890","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}

{"title":"Peralkaline Rhyolite Dikes at the Cape Ashizuri : A New Type of REE and Rare Metal Mineral Resources","authors":"S. Ishihara, Tsuyoshi Tanaka, S. Terashima, S. Togashi, S. Murao, H. Kamioka","doi":"10.11456/SHIGENCHISHITSU1951.40.107","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.107","url":null,"abstract":"The final product of the Cape Ashizuri A-type granitic activities of Miocene age in the Outer Zone of Southwest Japan is a few N-S trending dikes of rhyolitic composition. This rock is pale bluish green in color composed mainly of alkali feldspar and alkali amphibole, and some accessory minerals. Its (Na2O+K2O)/Al2O3 (mole) exceeds 1, thus peralkaline in the chemistry. The rock is anomalously rich in the following valuable rare metal elements; Nb 633 ppm (50 times of JG-1 granodiorite reference sample), Ta 52 ppm (31 times), Zr 1567 ppm (15 times), Hf 38 ppm (11 times), Th 104 ppm (8 times), U 25 ppm (7.6 times), total rare earth elements (REE) 751 ppm (6.5 times) and Y 161 ppm (5.4 times). These elements appear to be contained at least four independent accessory minerals. The rock can therefore be a new type of rare metal mineral resources.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"66 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124589442","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}

{"title":"Mineral and Geothermal Exploration in Japan from 1988 to 1989","authors":"T. Shoji","doi":"10.11456/SHIGENCHISHITSU1951.40.125","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.125","url":null,"abstract":"1989年 は,1ド ルが130円 か ら140円 で推移 し,1990年 に入 ってか ら150円台か ら160円 台と,急 速 に円安 に向か った.日 本 国内の資源産業 に とって,円 安 は歓迎すべ き 傾 向であるが,探 査 につ いてはまだその影響 が現れ てい ない.こ のため,前 年度 同様1989年 度 も企業 に よる探査 は不活発 であった.し か し,以 下 に述 べる ように,地 質 調査所 の研究者 に よ り,現 在,生 成 されつ つある鉱床, す なわ ち海底熱水鉱床 と含金温 泉沈澱物 が精 力的 に調べ られ た.こ れ らはす ぐにあるいは永 久に資源 として回収 され るこ とはないか もしれないが,資 源を探査す る者 に 多 くの夢 を与え て くれ る.地 熱資源の関係では,秋 田県 の上 の岱 地熱地 帯 と,鹿 児島県 の霧 島地 熱地 帯を対象 に,資 源 開発企業 と電 力会社 との間で地熱 発電のための 協定 が結 ばれた.朗 報 であ る.ま た,資 源経 済に関する 活動 も地道 に進 み,遅 ればせなが ら日本で も資源デ ータ ベ ースが充 実 して きてい る.こ れ らを中心に,1989年 度 における 日本国内 と,海 外で 日本が関係 した鉱床探査に ついて概 観す る.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130737579","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}

{"title":"Geophysical Exploration for Unconformity-Related Uranium Deposits in the Northeastern Part of the Thelon Basin, Northwest Territories, Canada","authors":"Ken Hasegawa, Gordon I. Davidson, P. Wollenberg, Yoshimasa Iida","doi":"10.11456/SHIGENCHISHITSU1951.40.83","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.83","url":null,"abstract":"Recent progress in the use of geophysical exploration techniques for unconformity-related uranium deposits within permafrost terrain in the northeastern part of the Thelon basin, Northwest Territories, Canada, is summarized using exploration case histories. These exploration techniques have attempted to use the unique physical and petrological propertiesof altered rocks that accompany uranium mineralization. Altered rocks are detectable as low resistivity anomalies by airborne resistivity and ground VLF-resistivity surveying, and the influence of thin surficial thawed zones on the responses are minimal except for the ground underneath large lakes. Gravity surveys are very effective for detecting low density zones associated with alteration and mineralization provided that the overburden is uniform in thickness (or the actual thickness is known), and a low density alteration zone is relatively shallow and/or large enough to produce a recognizable anomaly. A geophysical model can be established to link the physical properties of various alteration zones. Resistivity can be significantly decreased in the early stages of alteration (or relatively weak alteration) by hydrolysis of feldspar (sericitization). However, it is not the hydrolysis of feldspar that is responsible for the significant change of density that is typical of inner part of alteration zones, but rather the dissolution of quartz followed by replacement by water. This suggests that an influx of a considerable volume of hydrothermal solutions has contributed to promote desilication, and that the mineralization must be related to this influx of solution, which can be inferred by the close spatial relationship between desilication and uranium mineralization. Introduction Unconformity-related deposits have been a major uranium exploration target within the last two decades due to their high grade nature. The northeastern part of the Thelon basin, located in District of Keewatin, Northwest Territories, Canada, is one of the prospective areas for unconformity-related deposits. The first discovery of an economically significant uranium deposit in the subject area was made by Urangesellschaft Canada Ltd. in 1977 (BUNDROCK, 1981). An airborne radiometric survey and ground follow-up led to the discovery of the deposit which was formerly called Lone Gull and was later renamed the Kiggavik deposit (FUCHS and HILGER, 1989). During the successive exploration history of the area, the effectiveness of radiometric surveys has been marginal as the exploration target has shifted to blind deposits, and non-radiometric surveys consisting of electromagnetic and gravity surveying have begun to play a major role in detecting alteration zones. This paper summarizes the development of geophysical exploration techniques in the area which have attempted to use the unique Received on March 1,1990, accepted on March 10, 1990. *PNC Exploration (Canada) Co ., Ltd., 2401-650 W. Georgia St., Vancouver, B.C., V6B 4N8, C","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131841374","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}

{"title":"Indium-Bearing Ore from the Goka Mine Naegi District, Southwestern Japan","authors":"S. Murao, M. Furuno","doi":"10.11456/SHIGENCHISHITSU1951.40.35","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.35","url":null,"abstract":"Indium-containing ore was found from the Goka mine. The ore is mainly composed of sulfides like chalcopyrite, sphalerite, stannite, arsenopyrite, galena, cassiterite and gangue minerals. Microprobe analyses indicate that the indium carriers in the Goka mine are sphalerite (<1.89 wt%In), stannite (<9.63 wt%In), chalcopyrite (<0.4 wt%In), and cassiterite (<1.21 wt%In). In addition to the minerals mentioned above, Zn-Cu-Fe-In-Sn-S minerals of varying chemical composition are observed. Their formula is expressed as mCu(In, Sn)S2•n(Zn, Fe)S, where most of the analysis data show m:n=1:2 or 1:4. The occurrence of the indium minerals at the Goka mine gives an additional evidence that the tin-polymetallic veins are important indium concentrating geologic bodies. Introduction Indium is an important rare metal which is used for dental alloy, low melting point alloy, bearings, electronics industry and so on. Japan is the No. 1 producer of indium in the world and produced 16 tons of indium concentrate in 1986 (ROSKILL INFORMATION SERVICES LTD., 1987). But the domestic supply for the indium ore comes exclusively from the Toyoha mine. It is, therefore, important to explore the new types of indium-bearing deposits in addition to the Toyoha mine. Recently MURAO and ANDOH (1989) pointed out that the xenothermal type*1 deposit is an important indium concentrating geologic body in nature: According to their research, tin-polymetallic veins embedded in rhyolite carry indium as indium minerals or impurity of sulfides. For example, a new indium mineral, sakuraiite was described by KATO (1965) from the Ikuno deposit which is situated at the north of the ilmenite-series Sanyo granite. Thus the present authors focus their attention to the Goka mine, now abondaned, which has similar geologic condition to the Ikuno: the polymetallic vein is embedded in volcanic rock beside the ilmenite series Naegi granite. The samples were collected from the waste of the Goka deposit and were served for the EPMA analyses. Goka Mine The Goka mine is located in the Naegi district, about 60 km northeast of Nagoya City (Fig. 1). The naegi district has been famous for the uraniferous pegmatite mineralization (e.g. SAKAMAKI et al., 1961) around the Uppermost Cretaceous Naegi granite which is well fractionated ilmenite-series granite with extremely high ratio of Rb/Sr and high concentration of fluorine (ISHIHARA and TERASHIMA, 1977). According to SAKAMAKI et al. (1961), the veins in this district exhibit the zonal arrangement from the granite outwards: raremetal bearing pegmatites, W-Sn-Bi, W-AsBi, and Cu-Pb-Zn-As zones. But the zonation rather seems to start from the granoReceived on September 11, 1989, accepted on December 8, 1989 * Geological Survey of Japan , Higashi 1-1-3, Tsukuba 305, Japan. ** School of Science and Engineering , Waseda University, Nishiwaseda 1-6-1, Shinjuku, Tokyo 169, Japan.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"489 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130011039","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}

{"title":"Mineralization Characteristics in the Cumbre Area, Huanala Mining District, Central Peru","authors":"Yasumasa Fukahori, K. Sakogaichi","doi":"10.11456/SHIGENCHISHITSU1951.40.23","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.23","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122591326","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}

{"title":"Mineralization Ages of Some Epithermal Gold-Silver Vein-type Deposits in the Central Kitami Mining District of the Kitami Metallogenic Province, Hokkaido, Japan","authors":"H. Maeda","doi":"10.11456/SHIGENCHISHITSU1951.40.17","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.17","url":null,"abstract":"The mineralization ages of some epithermal gold-silver vein-type deposits in the Kitami metallogenic province, Hokkaido, Japan have been studied based on the K-Ar dating on the vein adularia and quartz mixtures. The Kohnomai mineralization took place in Middle Miocene time (12.9•}0.4 Ma). On the other hand, the gold-silver mineralization in the Ikutahara-Rubeshibe area occurred in Late Miocene to Early Pliocene time (Ryuo mine: 7.7•}0.2 Ma; Shakinzawa mine: 7.4•}0.2 Ma; Muka mine: 6.6•}0.2 Ma; Saroma mine: 5.3•}0.5 Ma).","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122844784","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}

{"title":"Relationships Among Carbonate-Replacement Gold Deposits, Gold Skarns, and Intrusive Rocks, Bau Mining District, Sarawak, Malaysia","authors":"T. J. Percival, A. S. Radtke, W. Bagby","doi":"10.11456/SHIGENCHISHITSU1951.40.1","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.40.1","url":null,"abstract":"Three distinct styles of gold mineralization are spatially associated with Miocene microgranodiorite porphyry stocks in the Bau mining district, Sarawak, Malaysia. These include: (1) gold-bearing calcic skarns; (2) several varieties of veins near and distal to calcic skarns; and (3) carbonate-replacement ore bodies in sedimentary rocks peripheral to the veins and typically furthest from the stocks. Most of the gold produced to date from the Bau district originated from the carbonate-replacement deposits. These deposits exhibit strikingly similar mineralogical and geochemical features with Carlin-type deposits that occur in the western United States. Similarities in key mineralogical and chemicall features of the ores indicate that all three styles of mineralization are not only spatially, but genetically, related to the microgranodiorite porphyry stocks. Preliminary fluid inclusion measurements on quartz from the three gold ore types suggest decreasing thermal and salinity gradients with increasing distance from the stocks. Introduction The Bau mining district is located in Sarawak, Malaysia, on the northwest side of Borneo, approximately 24 kilometers southwest of the capital city, Kuching (Fig. 1). The district's recorded production from 1820 to 1981 is 37.3 million grams of gold, 79 thousand tonnes of antimony, and 22,000 flasks (=748 tonnes) of mercury (HON, 1981). Gold deposits in the Bau district were first described by GEIKIE (1906) and general descriptions of the geology and mineral deposits were given by SCRUTTON (1906) and HAMILTON (1906). Regional geologic maps (WILFORD, 1955) and detailed geologic maps (WOLFENDEN, 1965; PIMM, 1967) characterized the geologic setting of the district. Mineralogical data on the arsenic-rich gold ores (LAU, 1970) and general information on the physical controls of mineralization (HON, 1981) helped establish a basic understanding of the occurrence of the gold mineral deposits. This paper summarizes the key features of various styles of mineralization that formed the different types of gold deposits and discusses spatial and genetic relationships among the carbonate-replacement, vein, and calcic skarn gold deposits with Tertiary, calc-alkaline porphyritic intrusions. The Bau gold deposits and the Purisima Concepcion deposit in the Yauricocha district of Peru (ALVAREZ and NOBLE, 1988) are the first documented examples suggesting a genetic link between carbonate-replacement gold deposits (Carlin-type deposits) and magmatism. District Geology The geologic framework of western Sarawak includes two subduction melange complexes emplaced upon continental sedimentary and volcanic basement rocks. These are (1) a Lower Jurassic to Lower Cretaceous complex in extreme western Sarawak, and (2) an Eocene complex to the east (HAMILTON, 1971). Within the Bau district, the older oceanic terrane was obducted onto continental rocks that include shale, sandstone, intermediate to felsic volcanic rocks, and minor Received on Mar","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"64 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1990-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116594999","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}