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Radiometric ages of quartz diorite bodies related to the Chichibu pyrometasomatic deposits and their relevance to the metallogenetic epoch 与秩父热交代矿床有关的石英闪长岩体的辐射年龄及其与成矿时代的相关性
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-02-05 DOI: 10.2465/GANKO1941.81.77
H. Ueno, K. Shibata
{"title":"Radiometric ages of quartz diorite bodies related to the Chichibu pyrometasomatic deposits and their relevance to the metallogenetic epoch","authors":"H. Ueno, K. Shibata","doi":"10.2465/GANKO1941.81.77","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.77","url":null,"abstract":"The K-Ar and fission track ages of quartz diorite bodies related to the Chichibu pyrometasomatic deposits were determined. The K-Ar biotite age from C body (Eastern intrusive body) is 6.59±0.27 Ma. The fission track dating on zircon from the same sample gives the concordant age of less than 8.1 Ma. The K-Ar biotote and hornblende ages from A body (Western intrusive body) are 5.87±0, 37 and 10.5±1.5 Ma, respectively. All ages obtained here correspond to the Late Miocene. By the previous paleomagmetical work it has been determined that the C body or igneous activity of C body among many igneous phases in the mining area is responsible for ore deposition. Therefore, we conclude that the age of 6.6 Ma which is obtained from C body is the mineralization age in the mining area. It is noteworthy that the mineralization of the Chichibu mining area is Late Miocene in age, whereas most other pyrometasomatic deposits in Japan were formed in Cretaceous time.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"1 1","pages":"77-82"},"PeriodicalIF":0.0,"publicationDate":"1986-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90127351","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: 9
Iron-rich pumpellyite and prehnite from the Miocene gabbroic sills of the Shimane Peninsula, Southwest Japan 日本西南部岛根半岛中新世辉长岩岩中的富铁泵长岩和前辉长岩
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-02-05 DOI: 10.2465/GANKO1941.81.51
K. Kano, H. Satoh, M. Bunno
{"title":"Iron-rich pumpellyite and prehnite from the Miocene gabbroic sills of the Shimane Peninsula, Southwest Japan","authors":"K. Kano, H. Satoh, M. Bunno","doi":"10.2465/GANKO1941.81.51","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.51","url":null,"abstract":"In the three Miocene gabbroic sills of the Shimane Peninsula , pumpellyite and prehnite are found to occur as secondary minerals replacing the primary minerals and as druse minerals . Additionally, prehnite, together with minor amounts of other minerals , not infrequently forms veins and nodular aggregates. The electron probe microanalysis shows that the range of the Fe/Al ratio in both minerals are fairly wide, and their maximum iron contents represent the highest in pumpellyite and prehnite ever reported from Japan.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"54 1","pages":"51-58"},"PeriodicalIF":0.0,"publicationDate":"1986-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74497823","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: 7
Calculation for correction in the measurement of the optic axial angle with the universal stage. 用万向台测量光轴角时的校正计算。
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-02-05 DOI: 10.2465/GANKO1941.81.83
K. Miyakawa
{"title":"Calculation for correction in the measurement of the optic axial angle with the universal stage.","authors":"K. Miyakawa","doi":"10.2465/GANKO1941.81.83","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.83","url":null,"abstract":"Because of the difference in index between crystal and hemisphere, corrections for rotations must be made in measuring the optic axial angle with the universal stage. The conventional methods require to use correction diagrams for the inclination angle and to evaluate the corrected value of the optic axial angle graphically by means of stereographic projection. Such graphical procedures, however, are troublesome and time-consuming as well as lower in accuracy, and many workers wish to make the collection more conveniently. The present author recommends the correction of the optic axial angle by calculation when the points of emergence of both optic axes can be determined directly with the five-axes universal stage. The method proposed here is of a mathematical treatment of the Emmons' graphical method and remarkably facilitates the procedure for correction by using a computer. It is also applicable to the correction in the measurement of the optic axial angle with the four-axes universal stage. Programs in the BASIC language are exemplified for both the five- and fouraxes universal stages.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"72 1","pages":"83-91"},"PeriodicalIF":0.0,"publicationDate":"1986-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74298962","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: 0
Cl and F contents of apatite in the Matsumae plutonic rocks, southwestern Hokkaido, Japan 日本北海道西南部松前深成岩中磷灰石的Cl和F含量
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-02-05 DOI: 10.2465/GANKO1941.81.67
Nobutaka Tsuchiya
{"title":"Cl and F contents of apatite in the Matsumae plutonic rocks, southwestern Hokkaido, Japan","authors":"Nobutaka Tsuchiya","doi":"10.2465/GANKO1941.81.67","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.67","url":null,"abstract":"","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"158 1","pages":"67-76"},"PeriodicalIF":0.0,"publicationDate":"1986-02-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86791276","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: 5
Geology and petrology of the Haga zoned pluton in the northwestern part of Hyogo Prefecture, Southwest Japan 日本西南部兵库县西北部羽贺分带岩体的地质与岩石学
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-01-05 DOI: 10.2465/GANKO1941.81.32
Y. Tainosho
{"title":"Geology and petrology of the Haga zoned pluton in the northwestern part of Hyogo Prefecture, Southwest Japan","authors":"Y. Tainosho","doi":"10.2465/GANKO1941.81.32","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.32","url":null,"abstract":"","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"42 1","pages":"32-45"},"PeriodicalIF":0.0,"publicationDate":"1986-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78165833","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: 0
Occurrence and geochemical nature of phosphatic rocks and Mn-rich carbonate rocks in the Toyoman Series, Kitakami Mountains, Northeastern Japan 日本东北北上山富锰系磷化岩和富锰碳酸盐岩赋存状态及地球化学性质
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-01-05 DOI: 10.2465/GANKO1941.81.12
S. Kanisawa, M. Ehiro
{"title":"Occurrence and geochemical nature of phosphatic rocks and Mn-rich carbonate rocks in the Toyoman Series, Kitakami Mountains, Northeastern Japan","authors":"S. Kanisawa, M. Ehiro","doi":"10.2465/GANKO1941.81.12","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.12","url":null,"abstract":"Various phosphatic and carbonate rocks are intercalated within black shale of the Upper Permian Toyoman Series. They are divided into four types on the basis of their occurrence and lithology, i. e., 1) nodule, 2) A type: phosphate bearing calcareous shale, 3) B type: coarse grey coloured carbonaceous sandstone, 4) C type: massive greyish sparitic limestone. Petrological and chemical features of four types are transitional with each other. Phosphate is dominant in the nodules and A type rocks, while carbonate is dominant in B and C type rocks. The analytical results of these rocks show the following characteristics: P2O5 and F contents of analysed rocks have wide ranges from 17.73 to 0.09% and 14, 000 to 85 ppm, respectively. Strong correlations between P2O5-F, FeO* (total iron as FeO)-MgO, CaO-CO2, and MnO-CaO are worthy of note. Phosphate-rich rocks are composed mainly of cryptocrystalline fluorapatite. Carbonate in all types contain several% of MnCO3 as solid solution. Judging from an important role of upwelling, the existence of sedimentary phosphatic rocks and Mn-rich carbonate rocks indicates that the sedimentary environments of the Toyoman Series were not a closed inland sea, but a continental shelf or slope.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"12 1","pages":"12-31"},"PeriodicalIF":0.0,"publicationDate":"1986-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81544856","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: 8
Petrology of Hayachine ultramafic complex in contact aureole, NE Japan (II) 日本东北部接触光环中Hayachine超镁铁杂岩的岩石学(II)
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-01-05 DOI: 10.2465/GANKO1941.81.59
H. Fujimaki, K. Yomogida
{"title":"Petrology of Hayachine ultramafic complex in contact aureole, NE Japan (II)","authors":"H. Fujimaki, K. Yomogida","doi":"10.2465/GANKO1941.81.59","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.59","url":null,"abstract":"The thermal history imprinted on the Hayachine ultramafic complex in the Tono granodiorite aureole has been reconstructed. The contact aureole in the complex can be divided into four zones, from north to south, using critical mineral assemblages as follows: Zone 1 olivine+antigorite+clinopyroxene Zone 2 olivine+talc±tremolite Zone 3 olivine+anthophyllite±tremolite Zone 4 olivine+orthopyroxene±tremolite The mineral paragenesis indicates that the temperature reached at approximately 400°C in the north of the complex, and 750°C at the southern margin. Abundant carbonate minerals were formed in the northern marginal area of the zone 1. The mineral assemblages change (from the northern rim to the middle of the zone) from magnesite+talc, magnesite+talc+antigorite to magnesite+antigorite. The change should have been caused by decreasing in CO2 pressure. The original rock of the complex is probably a residual mantle material (harzburgite with dunite).","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"12 1","pages":"59-66"},"PeriodicalIF":0.0,"publicationDate":"1986-01-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85998339","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: 8
Petrology of Chokai volcano. Part III - Trace elements and petrogenesis. 朝开火山的岩石学。第三部分:微量元素和岩石成因。
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-01-01 DOI: 10.2465/GANKO1941.81.370
S. Hayashi
{"title":"Petrology of Chokai volcano. Part III - Trace elements and petrogenesis.","authors":"S. Hayashi","doi":"10.2465/GANKO1941.81.370","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.370","url":null,"abstract":"","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"11 1","pages":"370-383"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75094615","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: 10
Petrology of Hayachine ultramafic complex in contact aureole, NE Japan. I: Primary and metamorphic minerals 日本东北部接触光圈中Hayachine超镁铁杂岩的岩石学。原生矿物和变质矿物
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1986-01-01 DOI: 10.2465/GANKO1941.81.1
H. Fujimaki, K. Yomogida
{"title":"Petrology of Hayachine ultramafic complex in contact aureole, NE Japan. I: Primary and metamorphic minerals","authors":"H. Fujimaki, K. Yomogida","doi":"10.2465/GANKO1941.81.1","DOIUrl":"https://doi.org/10.2465/GANKO1941.81.1","url":null,"abstract":"Hayachine ultramafic complex has been suffered a contact metamorphism. The rocks mainly consist of metamorphic olivine, clinopyroxene, orthopyroxene, serpentine, talc, tremolite, anthophyllite and magnetite. Relict minerals were distinguished from metamorphic minerals. In the northern area of the low metamorphic grade, relict olivine as well as clinopyroxene were found. Chromite is a probable relict mineral appearing throughout the complex. Metamorphic orthopyroxene is found in the area of the highest metamorphic grade, and is enstatite depleted in diopside component. The relict olivines are Fo89.5-93 and enriched in NiO, whereas the metamorphic olivines in the low grade (up to Fo96.5) are depleted in NiO. In the high grade area in the south of the complex, the metamorphic olivine (Fo90-93.5) are enriched in NiO as much as the relict olivine. The metamorphic diopside is extremely poor in Cr2O3 and Al2O3. The relict diopsides are more enriched in the both elements than the metamorphic ones, but they are less enriched in wollastonite component than the metamorphic ones.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"3 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89779144","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: 9
Mixed layer mica/smectite in the Miocene sediments of the area southeast of the Lake Towada, Northeast Japan 日本东华湖东南地区中新世沉积物中的云母/蒙脱石混合层
The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists Pub Date : 1985-12-05 DOI: 10.2465/GANKO1941.80.526
Yukito Oda, Shunichi Suzuki, Yoshihiko Oyama
{"title":"Mixed layer mica/smectite in the Miocene sediments of the area southeast of the Lake Towada, Northeast Japan","authors":"Yukito Oda, Shunichi Suzuki, Yoshihiko Oyama","doi":"10.2465/GANKO1941.80.526","DOIUrl":"https://doi.org/10.2465/GANKO1941.80.526","url":null,"abstract":"Core samples from 18 boreholes in the area southeast of the Lake Towada were investigated to determine expandability of mica/smectite in the Miocene sediments. The expandability decreases with depth from about 80 to 0% over intervals of 100 to 400m in the western part of the area, while intervals of more than 600m in the eastern part. The percentage of expandable layers in mica/smectite decrease from east to west. The expandable layer isopleth map at the top of the Yotsuzawa Formation shows a decrease in expandable layers from 80 to 10% at a distance of about 500m. The conversion of smectite to mica/smectite mixed layers begins at 0.6-0.8% vitrinite reflectivity, and the conversion to the 10% of expandable layers occurs in 1.2-2.8% vitrinite reflectivity. Stratiform ore bodies of Kuroko and copper-lead-zinc veins are restricted to the zone less than 20% of expandable layers at the top of the Yotsuzawa Formation. The expandability of mica/smectite mixed layer in sediments is useful as a guide to mineral exploration.","PeriodicalId":22709,"journal":{"name":"The Journal of the Japanese Association of Mineralogists,Petrologists and Economic Geologists","volume":"PP 1","pages":"526-536"},"PeriodicalIF":0.0,"publicationDate":"1985-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84351583","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
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