Geology of Ore Deposits最新文献_第4页

Native Cobalt in Deep Levels of the Kola Superdeep Borehole 科拉超深钻孔深层中的原生钴

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-08 DOI: 10.1134/s107570152308007x

T. A. Gornostaeva, A. V. Mokhov, P. M. Kartashov, K. V. Lobanov

{"title":"Native Cobalt in Deep Levels of the Kola Superdeep Borehole","authors":"T. A. Gornostaeva, A. V. Mokhov, P. M. Kartashov, K. V. Lobanov","doi":"10.1134/s107570152308007x","DOIUrl":"https://doi.org/10.1134/s107570152308007x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Native cobalt was found in amphibolite of the Kola superdeep borehole (SG-3) from a depth of 9630 m by a complex of local analytical methods (analytical scanning electron microscopy, electron backscatter diffraction). The studied amphibolite is a fine-grained melanocratic rock composed mainly of magnesioferri- hornblende and containing accessory native metal, telluride, sulphotelluride, and sulphide (Au, Ag, Pd, Bi, Cu, Pb, Zn, Sb, and Fe) mineralization.It also includes the clinopyroxene xenoclast carrying a fundamentally different set of accessories—poor in sulphides and including native cobalt. The absence of significant impurities, including iron, in native cobalt and its belonging to the hexagonal α-modification was determined. It is shown, that the metallic cobalt particles exposed during ion polishing of a compact pyroxene matrix cannot be a contaminant, introduced into the sample during drilling and sample preparation. Cobalt, obviously, was formed not only before the stage of retrograde metamorphism and subsequent hydrothermal processing of the amphibolite containing it, but probably long before the formation of the sedimentary protolith of this rock. That is, native cobalt belongs to the early high-temperature mineral phases inherited from the older Proterozoic—Archean main volcanism, while the time of formation of this layer of amphibolites dates back to the age of 2.4 billion years—the Early Karelian era of the Proterozoic.","PeriodicalId":12719,"journal":{"name":"Geology of Ore Deposits","volume":"17 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140881718","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

Tourmaline Supergroup Minerals from Rare-Metal Pegmatites of the Voron’ya Tundra (Kola Peninsula, Russia) 沃龙亚冻原（俄罗斯科拉半岛）稀有金属伟晶岩中的电气石超群矿物

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-08 DOI: 10.1134/s1075701523080081

N. I. Ponomareva, V. V. Gordienko, N. O. Melyantsov

{"title":"Tourmaline Supergroup Minerals from Rare-Metal Pegmatites of the Voron’ya Tundra (Kola Peninsula, Russia)","authors":"N. I. Ponomareva, V. V. Gordienko, N. O. Melyantsov","doi":"10.1134/s1075701523080081","DOIUrl":"https://doi.org/10.1134/s1075701523080081","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Study data on dark-colored, bright, and pale pink tourmalines of rare-metal pegmatites from Mt. Okhmylk in the Voron’ya Tundra region are reported. Chemical compositions and parameters of elementary cells are determined for tourmalines. Dark-colored tourmaline I is schörl–olenite, and pink tourmaline corresponds to elbaite–olenite. Studied tourmalines and tourmalines from spodumene pegmatites of other regions are compared. Based on the rare-earth element distribution in tourmalines, they are suggested to have been formed with involvement of high-temperature postmagmatic solutions. Mineral inclusions in schörl–olenite are represented by biotite and magnetite. Mineral inclusions in elbaite–olenite are cassiterite, pollucite, apatite, and tantalite. Tantalite is characterized by higher tantalum and low niobium. In addition, pure manganotantalite is often present in elbaite–olenite, and simpsonite is always observed at contacts between tantalite inclusions and tourmaline. All these data are indicative that albite–spodumene pegmatites of this region were formed with an active role of metasomatic processes.","PeriodicalId":12719,"journal":{"name":"Geology of Ore Deposits","volume":"87 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139762988","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

Liquation Differentiation of Komatiites: Features of Isotopic–Geochemical Composition of Rocks, Age, and Petrological–Geodynamic Implications (Using the Example of the Kostomuksha Greenstone Structure, Fennoscandian Shield) 科马蒂岩的液相分异：岩石同位素-地球化学成分的特征、年龄及岩石学-地球动力学意义（以芬诺斯堪地盾的科斯托穆克沙绿岩结构为例）

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-08 DOI: 10.1134/s107570152308010x

A. B. Vrevsky

引用次数: 0

Stolzite and Wulfenite in the Oxidation Zone of the Novoburannoe (Gumbeyskoe) Deposit (Southern Urals) 新布兰诺（古姆别斯科）矿藏氧化带的鲕粒和硫铁矿（南乌拉尔地区）

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-08 DOI: 10.1134/s1075701523080093

N. V. Sidorova, N. N. Korotaeva, E. M. Spiridonov, D. A. Khanin

引用次数: 0

Hg Mineral Forms in Argillisites of the South Kamchatka Thermal Fields, Russia 俄罗斯南堪察加热田阿尔吉利斯岩中的汞矿物形态

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-08 DOI: 10.1134/s1075701523080111

E. S. Zhitova, A. A. Nuzhdaev, A. V. Sergeeva, V. V. Shilovskikh

引用次数: 0

Olivine-Group Minerals from Melilite–Nepheline Paralavas of Combustion Metamorphic Complexes of Mongolia 蒙古燃烧变质岩群中的梅里利特-涅盘帕拉瓦岩橄榄石类矿物

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-08 DOI: 10.1134/s1075701523080068

V. E. Glushkova, I. S. Peretyazhko, E. A. Savina, E. A. Khromova

{"title":"Olivine-Group Minerals from Melilite–Nepheline Paralavas of Combustion Metamorphic Complexes of Mongolia","authors":"V. E. Glushkova, I. S. Peretyazhko, E. A. Savina, E. A. Khromova","doi":"10.1134/s1075701523080068","DOIUrl":"https://doi.org/10.1134/s1075701523080068","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>This paper reports the olivine-group minerals from melilite–nepheline paralavas of two combustion metamorphic (CM) complexes of Mongolia. The paralavas formed by thermal alterations of sedimentary rocks due to multistage modern and ancient (since the Quaternary) wild coal fires. The decomposition products of the olivine solid solution into Ca-bearing fayalite and kirschsteinite have been found in paralavas of the Khamaryn–Khural–Khiid CM complex. Apart from these minerals, members of isomorphic series forsterite–fayalite, and monticellite–kirschsteinite, and simplectite-like intergrowths of kirschsteinite with nepheline were identified in the paralavas of the Nyalga CM complex. The studied minerals differ in structural features, Mg# value, and crystallization temperature as a consequence of local variations in formation conditions and composition of silica-undersaturated Ca-rich mafic melts initial for melilite–nepheline paralavas. The olivines of the monticellite–kirschsteinite series reaching 86 mol % of kirschsteinite end-member occur only in paralavas bearing xenoliths of thermally modified carbonate-silicate sedimentary rocks. The crystallization of these olivines together with gehlenitic melilite took place through interaction between mafic paralava melts and xenoliths of marly limestones with large variations in content of silicate (clay–feldspar) admixture.","PeriodicalId":12719,"journal":{"name":"Geology of Ore Deposits","volume":"17 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140881550","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

Internal Structures of Placer Gold Grains As Prospecting Indicators of Primary Gold Sources in the Northeast of the Siberian Platform 作为西伯利亚地台东北部原生金源勘探指标的原生金粒内部结构

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-08 DOI: 10.1134/s1075701523080056

B. B. Gerasimov

{"title":"Internal Structures of Placer Gold Grains As Prospecting Indicators of Primary Gold Sources in the Northeast of the Siberian Platform","authors":"B. B. Gerasimov","doi":"10.1134/s1075701523080056","DOIUrl":"https://doi.org/10.1134/s1075701523080056","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Typomorphic features of placer gold are carriers of important information necessary for reconstruction of the formation history of gold placers and can be used as mineralogical criteria to search primary sources. The internal structure of grains of native gold is one of the most informative features. Internal structures of gold grains from modern placers and Early Permian conglomerates in the northeast of the Siberian Platform are studied. Structural etching of native gold was performed using the reagent (HCl + HNO3 + FeCl3⋅6H2O + CrO3 + thiurea + water). It was found that the well-rounded high-grade gold grains from modern placers experienced repeated redeposition through intermediate reservoirs. The discovery of slightly rounded gold grains, the internal structure of which bear no signs of exogenous transformation indicates that they were supplied to the modern alluvium from a nearby primary source. Apo-carbonate hydrothermal–metasomatic formations with the disseminated gold-sulfide mineralization were identified in the course of gold-ore exploration.","PeriodicalId":12719,"journal":{"name":"Geology of Ore Deposits","volume":"11 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140881554","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

Marble-Hosted Gem Spinel Deposits from Luc Yen District, North Vietnam: Mineral Systems and Some Aspects of Genesis 越南北部 Luc Yen 地区的大理石寄生宝石尖晶石矿床：矿物系统和成因的某些方面

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-07 DOI: 10.1134/s107570152307005x

V. G. Krivovichev, K. A. Kuksa, P. B. Sokolov, O. Yu. Marakhovskaya, M. E. Klimacheva

引用次数: 0

A Sulfite-Bearing Analog of Marinellite 一种含亚硫酸盐的马林卫星类似物

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-07 DOI: 10.1134/s1075701523070152

N. V. Zubkova, N. V. Chukanov, D. A. Varlamov, M. F. Vigasina, I. V. Pekov, D. A. Ksenofontov, D. Yu. Pushcharovsky

{"title":"A Sulfite-Bearing Analog of Marinellite","authors":"N. V. Zubkova, N. V. Chukanov, D. A. Varlamov, M. F. Vigasina, I. V. Pekov, D. A. Ksenofontov, D. Yu. Pushcharovsky","doi":"10.1134/s1075701523070152","DOIUrl":"https://doi.org/10.1134/s1075701523070152","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>The crystal structure of a mineral of the cancrinite group with an aluminosilicate framework of the marinellite type and a dominant sulfite group ({text{SO}}_{3}^{{2 - }}) in one of the extraframework sites in the liottite cavity is studied. The studied mineral is derived from a paleovolcano near Magliano (Lazio, Italy) and is one of the major rock-forming phases of the leucite–nepheline syenite. The divergence factor was R = 5.71% for 6819 independent reflections with I > 2σ(I). The studied mineral is trigonal, space group is P31c, and the unit cell parameters are a = 12.87267(18), c = 31.7393(5) Å, V = 4554.75(15) Å3. The crystal chemical formula Na29.78K11.82Ca6.40(Si36Al36O144)(SO4)6(SO3)2Cl2(OH)0.40⋅3.98H2O (Z = 1), which is based on the results of XRD structure analysis, is consistent with electron-microprobe data. The presence of the ({text{SO}}_{3}^{{2 - }}) anion was confirmed by the Raman spectrum.","PeriodicalId":12719,"journal":{"name":"Geology of Ore Deposits","volume":"4 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139755658","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

Hydrogen Bonding in Parascorodite and Relative Stability of Fe(AsO4)⋅2H2O Polymorphs 副沸石中的氢键和 Fe(AsO4)⋅2H2O 多晶体的相对稳定性

IF 0.7 4区地球科学

Geology of Ore Deposits Pub Date : 2024-02-07 DOI: 10.1134/s1075701523070061

S. V. Krivovichev

{"title":"Hydrogen Bonding in Parascorodite and Relative Stability of Fe(AsO4)⋅2H2O Polymorphs","authors":"S. V. Krivovichev","doi":"10.1134/s1075701523070061","DOIUrl":"https://doi.org/10.1134/s1075701523070061","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3>Density functional theory (DFT) has been used with CRYSTAL14 program to optimize hydrogen atom positions in the crystal structure of parascorodite Fe(AsO4)⋅2H2O. It has been shown that taking into account hydrogen bonding, the structure forms six-membered asymmetrical cycles –Fe1–O1–H1…O3–As–O2– and eight-membered cycles –Fe1–O1–H2…O2–Fe1–O2…H2–O1– with lateral topological symmetry. Calculation of the structural complexity parameters for scorodite and parascorodite and their comparison with thermodynamic characteristics shows that the Fe(AsO4)⋅2H2O polymorph modifications correspond well to Goldsmith’s rule that states that metastable transitional polymorphs are structurally simpler than thermodynamically stable phases. Scorodite is a stable phase, whereas parascorodite is metastable, which agrees well with the conclusions made in the previous works. Crystallization of parascorodite under natural conditions of oxidation zones of ore-mineral deposits may occur due to the high speed of its nucleation as a metastable phase, i.e., due to the kinetic stabilization of its structure.","PeriodicalId":12719,"journal":{"name":"Geology of Ore Deposits","volume":"17 1","pages":""},"PeriodicalIF":0.7,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139763049","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