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)

IF 0.9 4区地球科学 Q4 MINERALOGY

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

D. Nishio–Hamane, Katsuyuki Saito

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引用次数: 3

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

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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

在日本北海道如梅省哈伯罗镇的松三别苏河(前3种)、松三别苏村和阿伊纽泽河(后2种)中发现了与金、绿辉石(AuSn 2)、松三别苏(Ag 2)、银辉石(AuSb 2)、银辉石(AuPb 2)伴生的Au(Ag) - Sn - Sb - Pb矿物。Rumoiite (IMA No. 2018 - 161)和shosanbetsuite (IMA No. 2018 - 162)已被国际矿物学协会、新矿物、命名法和分类委员会(IMA - CNMNC)批准为新矿物，并以当地命名。这两种矿物在小于5µm处呈反面体状，并与原江矿、原生铅紧密结合，呈球形聚集体赋存于砂金中。根据经验公式和粉末反应数据，计算出黑云母和细山石的密度分别为10.1和11.1 g/ cm3。铝土矿和铁山岩的经验公式分别为(Au 0.95 Ag <0.01) Σ 0.96 (Sn 1.93 Sb 0.08 Pb 0.02 Bi 0.01) Σ 2.04(以3 apfu为基础)和(Ag 2.46 Au 0.54) Σ 2.99 (Sn 0.97 Sb 0.01 Pb 0.01 Bi 0.01) Σ 1.01(以4 apfu为基础)。ruboiite为正晶型Pbca，晶格参数a = 6.9088(7) Å， b = 7.0135(17) Å， c = 11.7979(19) Å， V = 571.6(2) Å 3 (Z = 8)。Shosanbetsuite为正晶型Pmmn，晶格参数a = 5.986(8) Å， b = 4.779(3) Å， c = 5.156(6) Å， V = 147.5(3) Å 3 (Z = 2)。Rumoiite和Shosanbetsuite分别对应合成ausn2和ag3sn相。本文还报道了铜辉石、安辉石、元江石和原生铅的化学成分，元江石和原生铅的单元胞参数。金(银)粒形成后的超岩浆岩石中的热液活动可能参与了Au(Ag) - Sn - Sb - Pb矿物的赋存。aurostibite

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来源期刊

Journal of Mineralogical and Petrological Sciences 地学-矿物学

CiteScore

1.80

自引率

14.30%

发文量

审稿时长

>12 weeks

期刊介绍： The Journal of Mineralogical and Petrological Sciences (JMPS) publishes original articles, reviews and letters in the fields of mineralogy, petrology, economic geology, geochemistry, planetary materials science, and related scientific fields. As an international journal, we aim to provide worldwide diffusion for the results of research in Japan, as well as to serve as a medium with high impact factor for the global scientific communication Given the remarkable rate at which publications have been expanding to include several fields, including planetary and earth sciences, materials science, and instrumental analysis technology, the journal aims to encourage and develop a variety of such new interdisciplinary scientific fields, to encourage the wide scope of such new fields to bloom in the future, and to contribute to the rapidly growing international scientific community. To cope with this emerging scientific environment, in April 2000 the journal''s two parent societies, MSJ* (The Mineralogical Society of Japan) and JAMPEG* (The Japanese Association of Mineralogists, Petrologists and Economic Geologists), combined their respective journals (the Mineralogical Journal and the Journal of Mineralogy, Petrology and Economic Geology). The result of this merger was the Journal of Mineralogical and Petrological Sciences, which has a greatly expanded and enriched scope compared to its predecessors.