Journal of Mineralogical and Petrological Sciences最新文献_第8页

Geochronology and geochemistry of granitoids from the Mongolian Altai 蒙古阿尔泰花岗岩的年代学和地球化学

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.210830

Dolzodmaa Boldbaatar, Y. Osanai, N. Nakano, T. Adachi, Jargalan Sereenen, Ippei Kitano, Kundyz Syeryekkhaan

引用次数: 1

Sulfur, carbon and oxygen isotopic compositions of Newania carbonatites of India: implications for the mantle source characteristics 印度Newania碳酸盐的硫、碳、氧同位素组成:对地幔源特征的启示

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.201130e

A. Banerjee, M. Satish‐Kumar, R. Chakrabarti

{"title":"Sulfur, carbon and oxygen isotopic compositions of Newania carbonatites of India: implications for the mantle source characteristics","authors":"A. Banerjee, M. Satish‐Kumar, R. Chakrabarti","doi":"10.2465/jmps.201130e","DOIUrl":"https://doi.org/10.2465/jmps.201130e","url":null,"abstract":"This study presents ﬁ rst report of the sulfur isotopic compositions of carbonatites from the Mesoproterozoic Newania complex of India along with their stable C and O isotope ratios. The δ 34 S V – CDT ( − 1.4 to 2 ‰ ) and Δ 33 S ( − 0.001 to − 0.13 ‰ ) values of these carbonatite samples (n = 7) overlap with the S isotope compositions of Earth ’ s mantle. Additionally, the δ 13 C V – PDB and δ 18 O V – SMOW values of these carbonatites also show overlapping compositions to that of Earth ’ s mantle. Based on these mantle – like stable isotopic compositions of carbonatites along with their higher crystallization temperature (~ 600 °C) compared to a hydrothermal ﬂ uid (<250 °C), we suggest that the sul ﬁ de minerals in these carbonatites were formed under a magmatic condition. The mantle like signatures in the δ 34 S, δ 13 C – δ 18 O, and 87 Sr/ 86 Sr values of these carbonatites rule out possible crustal contamination. Coexistence of the sul ﬁ de phase (pyrrhotite) with magnesite in these carbonatites suggests that the sul ﬁ de phase has formed early during the crystallization of carbonatite magmas under reducing conditions. Overall restricted variability in the δ 34 S values of these samples further rules out any isotopic fractionation due to the change in the redox condition of the magma and re ﬂ ect the isotopic composition of the parental melts of the Newania carbonatite complex. A compilation of δ 34 S of carbonatites from Newania and other complexes worldwide indicates limited variability in the isotopic composition for carbonatites older than 400 Ma, which broadly overlaps with Earth ’ s asthenospheric mantle composition. This contrasts with the larger variability in δ 34 S observed in carbonatites younger than 400 Ma. Such observation could suggest an overall lower oxidation state of carbonatite magmas emplaced prior to 400 Ma.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"13 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68831174","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

XANES analyses on minor elements and X–ray single crystal structure analyses of Ce– and Nb–perovskite 铈、铌钙钛矿微量元素XANES分析及x射线单晶结构分析

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/JMPS.200424

Ginga Kitahara, A. Yoshiasa, M. Tokuda, T. Tobase, K. Sugiyama

{"title":"XANES analyses on minor elements and X–ray single crystal structure analyses of Ce– and Nb–perovskite","authors":"Ginga Kitahara, A. Yoshiasa, M. Tokuda, T. Tobase, K. Sugiyama","doi":"10.2465/JMPS.200424","DOIUrl":"https://doi.org/10.2465/JMPS.200424","url":null,"abstract":"Structural analysis of Ce – and Nb – perovskites containing Fe, Zr, Nb, and rare earth elements (REEs) in CaTiO 3 perovskite was performed using single – crystal X – ray di ﬀ raction and X – ray absorption near – edge structure (XANES) analyses. Based on chemical analysis results, XANES measurements and the site – occupation of elements at A – and B – sites showed the chemical formula: (Ca 2+0.817 REE 3+0.087 Na +0.081 Sr 2+0.005 Th 4+0.003 ) 1.998+0.993 (Ti 4+0.941 Nb 5+0.017 Fe 3+0.013 V 5+0.010 Fe 2+0.007 Sc 3+0.006 Zn 2+0.005 Al 3+0.002 Ge 4+0.001 W 6+0.001 ) 3.996+1.003 O 3 for Ce – perovskite and (Ca 2+0.937 Ce 3+0.021 Na +0.020 La 3+0.015 Sr 2+0.003 ) 2.008+0.996 (Ti 4+0.730 Nb 5+0.122 Fe 3+0.108 Al 3+0.020 Zr 4+0.009 V 5+0.008 ) 3.990+0.997 O 3 for Nb – perovskite. In Ce – and Nb – perovskites, the total charges at the A – and B – sites achieved near – ideal divalent and tetravalent states such as Ca 2+ Ti 4+ O 3 , respectively, due to complex elemental substitutions. Local distortions around Ti in the perovskite solid solutions were greater, and the pre – edge features of the Ti atoms in Ce – and Nb – perovskites were di ﬀ erent from those in pure CaTiO 3 . The valence states and local structures of Fe in Ce – and Nb – perovskites were signi ﬁ cantly di ﬀ erent. The existence of divalent Fe 2+ at the B – site in Ce – perovskite was con ﬁ rmed. It is presumed that the displacement ellipsoids of all atoms and local irregularities in Ce – perovskite increase owing to the radiative decay of the actinoid element Th. We recon ﬁ rmed that the composition and three – dimensional structure of perovskite – type structures were ﬂ exible and caused various electrical, structural changes.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68830465","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Geochemical characteristics of silica scales precipitated from the geothermal fluid at the Onuma geothermal power plant in Japan 日本大沼地热发电厂地热流体中沉淀二氧化硅的地球化学特征

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.201130b

M. Fukuyama, Feiyang Chen

{"title":"Geochemical characteristics of silica scales precipitated from the geothermal fluid at the Onuma geothermal power plant in Japan","authors":"M. Fukuyama, Feiyang Chen","doi":"10.2465/jmps.201130b","DOIUrl":"https://doi.org/10.2465/jmps.201130b","url":null,"abstract":"The scale precipitation is a major issue at geothermal power plants as it reduces the production rate of geothermal energy. The scale precipitates at different physical and chemical conditions in each geothermal power plant as a result from a fluid–rock interaction for the specific conditions at each plant. Thus, it is important to understand the chemical characteristics and precipitation process of the scale from geothermal fluid. The information on the process of transportation of metals and its precipitation from hydrothermal fluid in general will be useful to understand the formation of hydrothermal ore deposit. In this study, we have examined the chemical characteristics of silica scaling from the Onuma geothermal power plant at Akita Prefecture, Japan. The scale consists of mainly amorphous silica and trace amounts of smectite, kaolinite, and euhedral pyrite. Chemical composition of silica scale indicates that Fe content scale shows positive correlation with Pb, Cu, and REE. These elements probably incorporate into pyrite in silica scale. The texture of pyrite suggests that pyrite is possible to crystalize prior to the growth of amorphous silica. Silica scale gradually changes its chemical composition from the production well toward the reinjection well. Concentrations of SiO2, Fe2O3, MgO, and MnO in silica scale significantly decrease toward to the reinjection well from the production well, and those of Al2O3, LOI, and alkali and alkali earth elements (Na2O, K2O, and CaO) increase toward to the reinjection well. Most of trace elements including REE in silica scale also significantly decrease toward to the reinjection well, and furthermore HREE decreases more extensively than LREE though alkali and alkali earth elements (Be, Rb, Sr, Cs, and Ba) increase toward to the reinjection well. The change of element concentration in silica scales can be utilized to understand the physical and chemical conditions in the pipes at the geothermal power plant.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68830955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Raman spectroscopic study of pressure–induced phase transitions in tridymite modifications 拉曼光谱研究压力诱导的钇铝石改性相变

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.210729

M. Kanzaki

引用次数: 1

Anatomy of Shaku–dake high–Mg diorite, southwest Japan: Lithofacies variations and growth process of high–Mg diorite stock 日本西南部Shaku-dake高镁闪长岩解剖:高镁闪长岩岩相变化及生长过程

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/JMPS.200917

K. Eshima

引用次数: 4

Redistribution of magnetite during multi–stage serpentinization: Evidence from the Taishir Massif, Khantaishir ophiolite, western Mongolia 多期蛇纹岩化过程中磁铁矿的再分配:来自蒙古西部汉泰希尔地块蛇绿岩的证据

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.201130a

Otgonbayar Dandar, A. Okamoto, M. Uno, N. Tsuchiya

{"title":"Redistribution of magnetite during multi–stage serpentinization: Evidence from the Taishir Massif, Khantaishir ophiolite, western Mongolia","authors":"Otgonbayar Dandar, A. Okamoto, M. Uno, N. Tsuchiya","doi":"10.2465/jmps.201130a","DOIUrl":"https://doi.org/10.2465/jmps.201130a","url":null,"abstract":"Magnetite veins are commonly observed in serpentinized peridotite, but the mobility of iron during serpentinization is poorly understood. The completely serpentinized ultrama ﬁ c rocks (originally dunite) in the Taishir Massif in the Khantaishir ophiolite, western Mongolia, contain abundant antigorite + magnetite (Atg + Mag) veins, which show an unusual distribution of Mag. The serpentinite records multi – stage serpentinization in the order: (1) Atg + lizardite (Lz) with a hourglass texture (Atg – Lz); (2) thin vein networks and thick veins of Atg; (3) chrysotile (Ctl) that cuts all earlier textures. Mg# values of the Atg – Lz (0.94 – 0.96) are lower than those of the Atg (~ 0.99) and chrysotile (~ 0.98). In the Atg – Lz regions, magnetite occurs as arrays of ﬁ ne grains (<50 µm) around the hourglass texture, and magnetite is absent in the thin Atg vein networks replacing Atg – Lz. Magnetite occurs as coarse grains (100 – 250 µm) in the center of some thick Atg veins. As the volume ratio of thin Atg veins to Atg – Lz increases, both the modal abundance of Mag and the bulk iron content decrease. These features indicate that hydrogen generation occurred mainly during Atg – Lz formation, and that the Mag distribution was largely modi ﬁ ed by dissolution and precipitation in response to the in ﬁ ltration of the higher temperature ﬂ uids associated with the Atg veins. The transport of iron during redistribution of Mag in the late – stage of serpentinization is potentially important for ore deposit formation and modifying the magnetic properties of ultrama ﬁ c bodies.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68830901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Au(Ag)–Sn–Sb–Pb minerals in association with placer gold from Rumoi province of Hokkaido, Japan: a description of two new minerals (rumoiite and shosanbetsuite) 日本北海道鲁梅省与砂金伴生的Au(Ag) -Sn-Sb-Pb矿物:两种新矿物(鲁莫伊石和松山贝特)的描述

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.210829

D. Nishio–Hamane, Katsuyuki Saito

{"title":"Au(Ag)–Sn–Sb–Pb minerals in association with placer gold from Rumoi province of Hokkaido, Japan: a description of two new minerals (rumoiite and shosanbetsuite)","authors":"D. Nishio–Hamane, Katsuyuki Saito","doi":"10.2465/jmps.210829","DOIUrl":"https://doi.org/10.2465/jmps.210829","url":null,"abstract":"Au(Ag) – Sn – Sb – Pb minerals occurring in association with gold, rumoiite (AuSn 2 ), shosanbetsuite (Ag 3 Sn), yuanjiangite (AuSn), aurostibite (AuSb 2 ), and anyuiite (AuPb 2 ), were found from the Shosanbetsu River (the former three), Shosanbetsu village and the Ainusawa River (the latter two), Haboro town, Rumoi province, Hokkaido, Japan. Rumoiite (IMA No. 2018 – 161) and shosanbetsuite (IMA No. 2018 – 162) have been approved as new minerals by the International Mineralogical Association, the Commission on New Minerals, Nomenclature and Classi ﬁ cation (IMA – CNMNC) and named after the locality. Both minerals show anhedral shape at less than 5 µm and occur in close association with one another, yuanjiangite, and native lead in spherical aggregates in placer gold. The densities of rumoiite and shosanbetsuite based on their empirical formulae and powder di ﬀ raction data were calculated to be 10.1 and 11.1 g/cm 3 , respectively. The empirical formulae of rumoiite and shosanbetsuite were (Au 0.95 Ag <0.01 ) Σ 0.96 (Sn 1.93 Sb 0.08 Pb 0.02 Bi 0.01 ) Σ 2.04 (basis of 3 apfu) and (Ag 2.46 Au 0.54 ) Σ 2.99 (Sn 0.97 Sb 0.01 Pb 0.01 Bi 0.01 ) Σ 1.01 (basis of 4 apfu), respectively. Rumoiite is orthorhombic, Pbca , with lattice parameters a = 6.9088(7) Å, b = 7.0135(17) Å, c = 11.7979(19) Å and V = 571.6(2) Å 3 (Z = 8). Shosanbetsuite is orthorhombic, Pmmn , with lattice parameters a = 5.986(8) Å, b = 4.779(3) Å, c = 5.156(6) Å and V = 147.5(3) Å 3 (Z = 2). Rumoiite and shosanbetsuite correspond to the synthetic AuSn 2 and Ag 3 Sn phases, respectively. The chemical compositions for aurostibite, anyuiite, yuanjiangite, and native lead, and the unit cell parameters for yuanjiangite and native lead are also reported in this paper. Hydrothermal activity in ultrama ﬁ c rocks after the formation of gold (electrum) grains may have been involved in the occurrence of Au(Ag) – Sn – Sb – Pb minerals. aurostibite","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"1 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68831897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Discovery of Li–bearing sodium amphibole from the Sanbagawa belt, Japan 日本三川带含锂钠角闪洞的发现

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.200728

Y. Banno, Chihiro Fukuda, N. Shimobayashi, S. Yamada

{"title":"Discovery of Li–bearing sodium amphibole from the Sanbagawa belt, Japan","authors":"Y. Banno, Chihiro Fukuda, N. Shimobayashi, S. Yamada","doi":"10.2465/jmps.200728","DOIUrl":"https://doi.org/10.2465/jmps.200728","url":null,"abstract":"Lithium – bearing sodium amphibole (Li 2 O = 0.01 – 1.02 wt%) was found in a specimen of schistose manganese ore from the Iimori region in the Sanbagawa metamorphic belt, central Japan. The ore is composed mainly of quartz, albite, amphibole, Na to Na – Ca pyroxene, and braunite. The amphibole occurs as prismatic crystals with lengths of up to 400 µm and consists of a pale – green core and an orange – red rim observed in hand specimen. The chemical formulae of averaged compositions of the core and rim, based on 24(O, OH, F, Cl) with (OH, F, Cl) = (2 − 2Ti) atoms per formula unit, are A (Na 0.468 K 0.448 ) Σ 0.916B (Na 1.586 Ca 0.393 Mn 2+0.021 ) Σ 2.000C (Mg 3.896 Mn 2+0.124 Fe 3+0.657 Al 0.182 Ti 0.031 Li 0.106 Cu 0.004 ) Σ 5.000T (Si 7.936 Al 0.064 ) Σ 8.000 O 22W [(OH) 1.771 F 0.167 O 0.062 ] Σ 2.000 and A (K 0.576 Na 0.428 ) Σ 1.004 B (Na 1.759 Ca 0.241 ) Σ 2.000C (Mg 3.143 Mn 2+0.332 Fe 3+0.782 Al 0.247 Mn 3+0.081 Ti Li Cu ) Si [(OH) O 0.106 ] Σ 2.000 , respectively. Consequently, the core amphibole has an intermediate composition between magnesio – arfvedsonite and potassic – magnesio – arfvedsonite, whereas the rim amphibole is potassic – magnesio – arfvedsonite.","PeriodicalId":51093,"journal":{"name":"Journal of Mineralogical and Petrological Sciences","volume":"11 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68830553","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative and semi–quantitative analyses using a portable energy dispersive X–ray fluorescence spectrometer: Geochemical applications in fault rocks, lake sediments, and event deposits 使用便携式能量色散x射线荧光光谱仪进行定量和半定量分析:断层岩、湖泊沉积物和事件沉积物的地球化学应用

IF 0.7 4区地球科学

Journal of Mineralogical and Petrological Sciences Pub Date : 2021-01-01 DOI: 10.2465/jmps.201224

Takahiro Watanabe, Chikako Ishii, C. Ishizaka, M. Niwa, K. Shimada, Y. Sawai, N. Tsuchiya, Tetsuya Matsunaka, S. Ochiai, F. Nara

引用次数: 3