The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists最新文献_第5页

Water involved in chloritization and sericitization in and around the Rendaiji mine, the Izu Peninsula, Japan 日本伊豆半岛仁大寺矿区及其周围参与绿泥化和绢云母化的水

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1987-01-05 DOI: 10.2465/GANKO1941.82.16

Y. Kuroda, Koji Watanabe, Sumio Nagai, S. Matsuo

{"title":"Water involved in chloritization and sericitization in and around the Rendaiji mine, the Izu Peninsula, Japan","authors":"Y. Kuroda, Koji Watanabe, Sumio Nagai, S. Matsuo","doi":"10.2465/GANKO1941.82.16","DOIUrl":"https://doi.org/10.2465/GANKO1941.82.16","url":null,"abstract":"The gold- and silver-bearing quartz veins of the Rendaiji mine (now closed) in the southern part of the Izu Peninsula are associated with sericitization and silicification in the Miocene volcanic and pyroclastic formations which have also suffered from a regional chloritization. δD values of the sericite and chlorite together with XFe values of chlorite were determined.Based on the average measured δD value of -64.5‰ of chlorite samples with the average XFe (=Fe''/(Fe''+Mg)) value of 0.32 and the dependence of the D/H fractionation factor between water and chlorite on XFe, -4‰/0.1XFe (Kuroda et al., 1976), we estimated the δD value for the pure magnesian chlorite to be -52‰. The estimated value of -52‰ is precisely the same as the average δD value of sericite of -52‰. Since there is no D/H fractionation between sericite and magnesian chlorite according to Kuroda et al. (1986b) and the formation temperature of the sericite and chlorite is estimated to be the same, the water responsible for both the sericitization and chloritization in the Rendaiji mine should be the same so far as the δD value is concerned.Using the δD value of sericite (average -52‰), we calculated the δD value of the water participated in both the sericitization and chloritization to be -12‰ on the basis of the D/H fractionation factor experimentally determined by O'Neil and Kharaka (1976), or -25_??_-28‰ based on that estimated by Marumo et al. (1980) from the natural samples. The δD value of the water estimated above is definitely higher than that of the contemporary local meteoric water. The δD value of the water extracted from fluid inclusions in the quartz associated with sericitization, -53_??_-63‰, is much lower than that of the water associated with sericitization.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"18 1","pages":"16-22"},"PeriodicalIF":0.0,"publicationDate":"1987-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83595056","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: 2

Rb-Sr whole-rock ages of granitic rocks from the Marumori district, northern Abukuma Plateau 阿布库马高原北部丸森地区花岗质岩石Rb-Sr全岩年龄

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1987-01-05 DOI: 10.2465/GANKO1941.82.36

K. Shibata

引用次数: 0

Sr isotopic study of Ibara dismembered ophiolite from the Maizuru Tectonic Belt, Southwest Japan 日本西南舞鹤构造带伊原碎裂蛇绿岩Sr同位素研究

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1987-01-05 DOI: 10.2465/GANKO1941.82.1

Yoshiyuki Koide, K. Tazaki, H. Kagami

引用次数: 19

Polarization color indices of ore minerals, calculation method and application to mineral identification 矿石矿物的偏振色指数、计算方法及其在矿物鉴定中的应用

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1987-01-01 DOI: 10.2465/ganko1941.82.91

Xu Guofeng, Mei Jianming

引用次数: 1

Haruo Ohashi “Reexamination of the pressure-composition diagram for the system NaCrSi2O6-NaAlSi2O6” Haruo Ohashi:《NaCrSi2O6-NaAlSi2O6体系压力-组成图的再检验》

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1987-01-01 DOI: 10.2465/GANKO1941.82.445

S. Banno

引用次数: 0

Aoso-Osore volcanic zone 奥索-奥索火山带

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-12-05 DOI: 10.2465/GANKO1941.81.471

M. Nakagawa, Hiroshi Shimotori, Takeyoshi Yoshida

{"title":"Aoso-Osore volcanic zone","authors":"M. Nakagawa, Hiroshi Shimotori, Takeyoshi Yoshida","doi":"10.2465/GANKO1941.81.471","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.471","url":null,"abstract":"Nasu volcanic zone, which has been considered as the Quaternary volcanic front of the Northeast Honshu arc, Japan, is divided into two zones, Aoso-Osore and Sekiryo volcanic zones. The Aoso-Osore zone, including Aoso, Nanashigure, Osore and Easan volcanoes, are situated at the closest side to the trench. Total volume of the eruptive materials of this zone is much less than that of the Sekiryo zone. No hydrous phenocrystic minerals occur in the volcanic rocks of the Sekiryo zone, while hornblende phenocryst is recognized in the andesites of the Aoso-Osore zone. Liquidus temperature of hornblende is kept relatively constant as the water content of magma varies. Accordingly, magmatic temperature of the Aoso-Osore zone is lower than that of the Sekiryo zone. The K2O content of the volcanic rocks of the Aoso-Osore zone is lower than that of the Sekiryo zone at the same SiO2 content, indicating that the nature of magmas of these two zones are different to each other. Thus the volcanic front of the Northeast Honshu are is revised to lie at the Aoso-Osore zone. At the front, volume of magma was small and temperature was low compared with those of the Sekiryo zone. These facts support the hypothesis that the volcanic front represents the limit of magma generation controlled by temperature and/or pressure profile of the wedge mantle of the arc.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"3 1 1","pages":"471-478"},"PeriodicalIF":0.0,"publicationDate":"1986-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78288610","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: 18

Metamorphic grade of kerogen in the area around the Hikami and the Kesengawa granites, Southern Kitakami Mountains, Northeast Japan 日本东北部北上山南部Hikami和Kesengawa花岗岩周围地区干酪根变质品位

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-12-05 DOI: 10.2465/GANKO1941.81.479

N. Tsuchiya, Shunichi Suzuki, Yukito Oda

引用次数: 1

Determination of some trace elements in silicate rocks by flameless atomic absorption spectrophotometry 无焰原子吸收分光光度法测定硅酸盐岩石中某些微量元素

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-12-05 DOI: 10.2465/GANKO1941.81.492

K. Ishikawa, S. Kanisawa

引用次数: 2

Zinckenite from the Kasuga mine, Kagoshima Prefecture, Japan 日本鹿儿岛县Kasuga矿的锌矿

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-11-05 DOI: 10.2465/GANKO1941.81.454

A. Sugaki, A. Kitakaze

引用次数: 1

Three types of photo-luminescence in natural zircon 天然锆石的三种光致发光类型

The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-11-05 DOI: 10.2465/GANKO1941.81.433

I. Shinno

{"title":"Three types of photo-luminescence in natural zircon","authors":"I. Shinno","doi":"10.2465/GANKO1941.81.433","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.433","url":null,"abstract":"Three types of luminescence spectra of natural zircon can be clearly distinguished: (1) type I that consists of line spectra is due to the transition within 4f electrons of REE such as Dy3+, Eu3+ Sm3+ and Tm3+, (2) type II with broad bands is originated from radiation centers due to alphadecay of U and Th, whose band intensities are closely related to the geologic age of the formation of zircon, and (3) type III is mainly formed by the activators of U and P in the zircon, where P acts as a sensitizer. The activators of Mn, Ni and V with the transition of 3d-3d electrons, and the activators of Ca, Zn, Ba, Sc and P with electron-hole centers also may contribute to the formation of the type III luminescence. Natural zircons have usually the type II luminescence with varying proportions of the type I or the type III luminescences. Natural zircon gives complex absorption spectra related to the type II luminescence. To characterize natural zircons, the latter luminescence spectra can be sensitively and easily detectable rather than the absorption spectra Also, the type II spectra show remarkable extinctionrestoration phenomena by the heat-treatment, and show the displacement of those band positions as the crystallographic direction changes (pleochroism of the luminescence). Color and luminescence of natural zircon are mainly caused by these luminescent centers identical to color centers.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"1 1","pages":"433-445"},"PeriodicalIF":0.0,"publicationDate":"1986-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80471930","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: 13