Mining geology最新文献

{"title":"Vein Formation and Mineralization of the Sambo Pb-Zn-Barite Deposit, South Korea","authors":"Y. Jwa","doi":"10.11456/SHIGENCHISHITSU1951.39.218_383","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.218_383","url":null,"abstract":"The Sambo Pb-Zn-Barite deposit belongs to a fissure filling vein type. The present study represents that the mineralized stages are classified into the four (I, II, III and IV). Major constituent minerals of each stage are as follows: quartz and sulfides (stage I), barite (stage II), quartz and sulfides (stage III) and quartz (stage IV). The ranges of filling temperature of fluid inclusions for stages I and III are very similar (90•‹ to 300•Ž for stage I and 120•‹ to 310•Ž for stage III), while the range for stage II (110•‹ to 260•Ž) is slightly lower than those for stages I and III. However, the salinity for stage II (8.7 to 11.8 wt% NaCl eq.) is higher than those for stage I (1.1 to 5.1 wt% NaCl eq.) and stage III (2.3 to 5.7 wt% NaCl eq.). The higher salinity for stage II (barite-forming stage) suggests the possibility of mixing of original fluid with high saline, Ba-rich solution (probably connate water origin). And the mixing may be responsible for the slightly lower range of filling temperature for stage II than those for stages I and III. Stage IV, the latest stage, shows the lowest range of filling temperature (110•‹ to 170•Ž).","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117009315","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":"Chemical compositon of chlorite with special reference to the iron vs. manganese variation, from some hydrothermal vein deposits, Japan","authors":"T. Yoneda","doi":"10.11456/SHIGENCHISHITSU1951.39.218_393","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.218_393","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115062080","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":"Manganese, Lead, Zinc and Silver Mineralization at the Matahachi Deposit of Jokoku Mine, Southwestern Hokkaido, Japan","authors":"D. Ishiyama, H. Matsueda, Takeshi Nakamura","doi":"10.11456/SHIGENCHISHITSU1951.39.218_403","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.218_403","url":null,"abstract":"Neogene mineralization related to the formation of magnetite skarns and manganese, lead, zinc and silver veins at the Matahachi deposit in the Jokoku-Katsuraoka mining area is summarized on the basis of macrostructures and mineral paragenesis of individual ore bodies, mineralization stages, hypogene zoning and environment of ore formation. The mineralization sequence, from earlier to later, is divided into five stages as follows; Stage I: formation of magnetite skarns, Stage II: formation of Pb-Zn-(Cu) quartz veins, Stage III: formation of Pb-Zn-(Mn) quartz veins, Stage IV: formation of (Pb)-(Zn) rhodochrosite veins, rhodochrosite veins and massive rhodochrosite deposits and Stage V: formation of ferromanganoan dolomite veins. Mineralization of stages (I) through (V) at the Matahachi deposit is closely related to the mineralization events showing polyascendent zoning. Three major kinds of vein deposits at the Matahachi deposit include Pb-Zn-(Mn) quartz veins, well-crusted banding (Pb)-(Zn) rhodochrosite veins and rhodochrosite veins. Ore types such as Pb-Zn, well-crusted banded rhodochrosite and rhodochrosite ores are correlated with ore grade. Based on ore grade, the three zones are arranged from the northwestern to southeastern part of the deposit in the order of Pb-Zn, Intermediate and Rhodochrosite zones. Pb-Zn-(Mn) quartz veins tend to occur in the Pb-Zn zone of the deposit, while rhodochrosite veins are widely distributed in the Rhodochrosite zone. Horizontal and vertical zoning could be formed by polyascendent mineralization related to formation of Pb-Zn-(Mn) quartz, (Pb)-(Zn) rhodochrosite and rhodochrosite veins. Formation temperatures gradually decrease from earlier to later stages at the Matahachi deposit. Changes of formation temperatures correspond to the progress of mineralization stages associated with multiple mineralization.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129034376","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":"Occurrence and Chemistry of Indium-containing Minerals from the Toyoha Mine, Hokkaido, Japan","authors":"E. Ohta","doi":"10.11456/SHIGENCHISHITSU1951.39.218_355","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.218_355","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"228 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126450162","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":"Micropore distibutions in granite as material migration pathways","authors":"Takatsugu Suzuki, S. Nakashima, Tetsushi Nagano, H. Kita","doi":"10.11456/SHIGENCHISHITSU1951.39.218_349","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.218_349","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-12-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133611288","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":"The Effect of Temperature Gradient on the Interaction between Geothermal Water and Rock—An Approach by Numerical Simulation","authors":"N. Takeno","doi":"10.11456/SHIGENCHISHITSU1951.39.217_295","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.217_295","url":null,"abstract":"Reaction between rhyolitic welded tuff and geothermal solution cooled or heated from the temperature in equilibrium with alteration minerals is numerically examined by the geochemical simulation code. Six varieties of the initial solutions are calculated assuming that total chloride concentrations are 0.01, 0.05 and 0.1 mole/kg and that they are in equilibrium with quartz, muscovite, calcite, albite, K-feldspar, clinochlore and laumontite at 225•Ž or wairakite instead of laumontite at 275•Ž in the H+-Na+-K+-Ca+2-Mg+2-Al+3-H4SiO4-H2O-Cl--CO3-2 system. The initial solutons are cooled or heated by 5•Ž to remove saturated minerals, and subsequently reacted with rlyolitic welded tuff. Quartz and muscovite precipitated in the processes of 5•Ž cooling and the subsequent rock-solution reaction at low rock/water ratio, which results in enrichment of K2O and SiO2 in the reaction product. Calcite always precipitates in the process of 5•Ž heating, and laumontite (or wairakite), albite and clinochlore precipitated in the process of the subsequent rock-solution reaction at low rock/water ratio, which results in enrichment of Na2O, CaO and MgO in the reaction product. These cooling and heating experiments represent respectively thermal condition of discharge area and recharge area in the geothermal system, and this study shows possibility of the hydrological interpretation of geothermal system from the rock alteration.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132762817","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":"Uraniferous Polymetallic Veins, Gebel El Missikat Area, Eastern Desert, Egypt","authors":"F. S. Bakhit, L. Guirguis, E. Shazly, A. Bahi","doi":"10.11456/SHIGENCHISHITSU1951.39.217_335","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.217_335","url":null,"abstract":"The uraniferous polymetallic veins in Gebel El Missikat area, Central Eastern Desert, Egypt, are mainly composed of chalcedony with subsidiary amount of fluorite and ore minerals containing uranium, molybdenium, lead, arsenic, gold, and silver. They are genetically related to late orogenic pink or red granite of Upper Proterozoic age. The veins occur in steeply dipping tectonic fractures trending east or northeast. The polymetallic minerals formed for at least two closely related episodes. These hydrothermal veins formed under low to moderate temperature condition and are enclosed in green alteration zones. The contents of molybdenium, lead, and fluorine in veins increase with an increase in uranium content. The relationships of As, Sr, Rb and Zr with silica are not distinct.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133226064","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":"Todorokite Veinlets in Opal-A Layers of Deep-Sea Manganese Nodules from the Northern Central Pacific","authors":"K. Iizasa, S. Takenouchi","doi":"10.11456/SHIGENCHISHITSU1951.39.217_325","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.217_325","url":null,"abstract":"Deep-sea Manganese nodules from the northern Central Pacific are characterized by todorokite veinlets. The veinlets develop as a network in concentric layers around a nodule core. The layers display varying degrees of reflectivities which are classified into four optically different zones (internal reflection, and low, moderate, and high reflectivity zones based on an arbitrary scale) under the ore microscope. The internal reflection zone is significantly enriched in Si and Fe, and is mainly composed of X-ray amorphous opal-A, probably of biogenic origin. The difference in reflectivity is attributed to varying amounts of todorokite crystallites and associated chemical elements across the layer. These differneces develop during nodule diagenesis.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126511263","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":"A hydrogeochemical exploration using fluoride in stream waters","authors":"Y. Seki","doi":"10.11456/SHIGENCHISHITSU1951.39.217_311","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.217_311","url":null,"abstract":"High anomalies of F, Li and Rb in bedrocks have been reported around the Takatori Sn-W deposit (M.I.T.I., 1987). Among them, F is the most effective pathfinder, because it shows the highest concentrations and the highest geochemical contrast. The purpose of the present study is to test the effectiveness of stream water as a geochemical exploration medium, with special attention to fluoride. Samples of stream water were collected from 116 sites and were subsequently analyzed. In addition, leaching experiments on bedrocks taken from this district were carried out. The result are summarized as follows. (1) From the distribution pattern of Fin stream waters, it is clear that the high anomalies of Fform the halo which surrounds the Takatori Sn-W deposit. (2) The halo formed by the high anomalies of Fin stream water, ranging over 2•~4 km, coincides with the known halo formed by the high anomalies of F in the bed rock, ranging over 1.5 •~ 3.5 km around the Takatori Sn-W deposit. (3) Therefore, it is considered that the anomalies of Fin stream water are the secondary geochemical dispersion due to fluoride which dissolved from the bedrocks with high F content around the Takatori Sn-W deposit. (4) As a result of the 6 days' leaching experiments, the high concentrations of dissolved fluoride, which is close to the fluorite saturation value (8.7mg/•¬F-), was obtained from fluorite-bearing bedrocks. On the other hand, relatively much lower concentrations of Fwere obtained from muscovite-bearing but fluorite-lacking bedrocks. (5) .Major F-bearing minerals around the Takatori Sn-W deposit are fluorite and muscovite. Fluorite exists in the bedrocks of which F content exceeds about 1000 ppm, nevertheless muscovite occurs also in the bedrocks with F content less than 1000 ppm. On the other hand, in the area where F content of bedrocks is higher than 500•`1000 ppm, Fconcentration in stream waters is much higher than in other area. These facts are in good agreement with the result of the leaching experiments. (6) In case of programming the geochmical exploation of mineral deposit types associating the fluorite as alteration minerals, it is recommended that Fin stream waters, as well as F in bedrocks, should be used as a usefull pathfinder.","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126702102","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":"Further Study on Silician Magnetite","authors":"Y. Shiga","doi":"10.11456/SHIGENCHISHITSU1951.39.217_305","DOIUrl":"https://doi.org/10.11456/SHIGENCHISHITSU1951.39.217_305","url":null,"abstract":"","PeriodicalId":383641,"journal":{"name":"Mining geology","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1989-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125964525","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}