<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The Upper Ordovician sedimentary succession of southeast Ireland is riddled with almost synsedimentary igneous intrusions. A study was required to determine any effects of these intrusions on Kübler Index (KI) so that further sampling for a regional study could be undertaken and the results would be unbiased. Sampling was carried out on the low-grade metapelites (Southeast Ireland) around the rhyolitic and doleritic intrusions, which were intruded into the still soft sediment. Clay mineralogy was determined using X-ray diffractometry and KI values were measured; SEM and whole rock elemental analyses were applied to complement the results of the XRD work. KIs immediately around rhyolitic intrusions were observed in all cases to be lower than the regional KI, however this was not seen around doleritic intrusions. SEM work shows illite grain sizes following the KI trend and K2O were noted to be highest where KI was lowest. Rare earth elements (REEs) show some mobilization which also follows the KI trend. This is considered to be a residual effect of hydrothermal fluids / volatiles hosted by the rhyolites but not encountered in the dolerites. Chlorite crystallinity is not affected as it most likely crystallized after the hydrothermal event. The KI is often used as a proxy for illite crystallinity in studies of low grade metamorphism but is influenced by many parameters and care should be taken when applying this technique to studies of regional metamorphism.</abstract>

Okavango Research Institute, University of Botswana, Private Bag 285 Maun, Botswana

Electron Microscope Unit, University of Botswana, Private Bag 704 Gaborone, Botswana

Observations on the effect of proximity to rhyolitic intrusions on Kübler index

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Radioactive veins in shear zones of the El-Seboah granite in Egypt with anomalous concentrations of Nd, Ce, Zr, Y, Nb, Sm, Th and U were studied by petrographic microscopy, x-ray diffraction, 57Fe Mössbauer and wet chemical methods. The veins are composed essentially of quartz, aegirine-augite and minor K-feldspar ± α-iron oxide (hematite) ± γ-iron oxide hydroxide (goethite). They likely represent late-stage felsic melt that was quenched and devitrified at high temperature to yield crystals and crystallites, and then subjected to low temperature alteration during which most of the K feldspar transformed to kaolinite and opal. Mössbauer parameters of the samples indicate that the existing Fe-bearing minerals are primary, with appreciable ordering in the Fe sites. The bulk-sample iron (ΣFe) contents are extremely high (12.3-22.4%). The extent of oxidation of the Fe has been found to be 100% by Mössbauer spectroscopy and 95.36-99.69% by a chemical method. These conditions of Fe enrichment and strong oxidation suggest that the veins are extreme differentiates of granite magmas where high states of oxygen fugacity prevailed.</abstract>

Valences and site characteristics of iron in radioactive magmatic veins (Egypt): A Mössbauer and chemical study

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Fine-grained aggregates of lithiophorite are associated with cryptomelane, romanèchite, birnessite and graphite in the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India. High-cobalt lithiophorite is reported for the first time from the manganese ores. The mode of occurrence and the chemical composition of the lithiophorite are discussed. Along with manganese and aluminium, the lithiophorite contains appreciable quantities of CoO (1.59-8.56%) together with trace amounts of Cu, Ni, Zn, Ti, Ca, Mg, Na, K and P. The Nishikhal lithiophorite is a transition metal-rich lithiophorite.</abstract>

Cobalt-rich lithiophorite from the Precambrian Eastern Ghats manganese ore deposit of Nishikhal, south Orissa, India

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">An effective remediation strategy for a polluted site should take the absolute amount of the pollutant(s) into account. Here, we present an elemental budget for As, Sb and Fe in two tailing impoundments of the former Sb-Au deposit near Pezinok, Slovakia. The two impoundments contain 5,740×103 kg As, 6,360×103 kg Sb and 50,105×103 kg Fe. An estimated total Au content in the impoundments is 132 kg. The most abundant minerals in the tailings are quartz, illite, and chlorite. The content of carbonates in the tailings is 3.5-10.5 wt% calcite equivalent and we estimate that the carbonates are sufficiently abundant to buffer the pH at circumneutral values, up to the point when all pyrite decomposes. The possible courses of action are i) do nothing, ii) build an active barrier to capture the released As and Sb, iii) isolate the impoundments from rain and ground water and iv) use the impoundments as a source of Sb and redeposit the waste in a safer form. The simplest approach is to do nothing, which seems to be the most likely course of events, given the current economic, political and societal state of the Slovak Republic. Although this action costs nothing in the short term, it may cause significant damage to the environment, especially to the alluvial sediments and associated water resources in the long term.</abstract>

Institute of Geosciences, Friedrich-Schiller University, Burgweg 11, Jena, D-07749 Germany

Institute of Geosciences, Albert-Ludwig University, Albertstraße 23b, Freiburg, D-79104, Germany

Department of Mineralogy and Petrology, Mlynská dolina G, Comenius University, Bratislava, SK-842 15, Slovakia

Department of Zoology and Anthropology, Constantine the Philosopher University, Nábrežie Mládeže 91, SK-949 74 Nitra, Slovakia

Department of Geology of Mineral Deposits, Mlynská dolina G, Comenius University, Bratislava, SK-842 15, Slovakia

Elemental and mineral inventory of tailing impoundments near Pezinok, Slovakia and possible courses of action for their remediation

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">This report presents the results of petrographical and mineralogical (optical microscopy, SEM/EDS) study of xenotime derived from the Upper (Middle?) Cambrian rocks (Wiśniówka Sandstone Fm.) of the abandoned Podwiśniówka mine pit. This is the first work on this mineral from the Holy Cross Mts. The authigenic xenotime occurs primarily as overgrowths around/on zircon in siliciclastic rocks. Moreover, this mineral is characterized by the large size of the overgrowths reaching 50 μm long and 20 μm wide. The presence of pyritecoated zircon/xenotime aggregates indicates that the xenotime formed prior to hydrothermal quartz-pyrite mineralization. The apparent lack of xenotime and vein pyrite in the tuff-bearing series, compared to the other two series displaying hydrothermal signature (pyrite, hematite, nacrite, jarosite), as well as considerable variations of the xenotime overgrowths in size and morphology, and their dominant irregular patchy-zonal microtexture may provide evidence for direct precipitation of this mineral from hydrothermal fluids.</abstract>

Xenotime from the Podwiśniówka mine pit, Holy Cross Mountains (South-Central Poland)

<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">A new association of ore minerals has been found in the Lower and Middle Triassic rocks in the vicinity of the village of Woźniki in the NW part of the Upper Silesian district. In addition to the typical Zn-Pb-Fe association in dolomites, copper sulphides have been detected in the sandstones and conglomerates of the Lower Bunter. Copper mineralization occurs in the sandstone matrix and is represented by bornite, chalcopyrite, chalcocite, tetrahedrite and covellite. High admixtures of zinc in Cu sulphides and admixtures of copper in Zn-Pb sulphides suggest a common source for the metal-transporting fluids and a single period of sulphide crystallization.</abstract>

Polymetallic mineralization in Triassic strata of the NW part of the Kraków-Częstochowa Monocline

AHEAD OF PRINT

Volume 55 (2024): Issue 1 (January 2024)

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Mineralogia

 Mineralogia (ISSN: 1899-8291, e-ISSN: 1899-8526), a free open access journal, publishes original research and review papers from broad fields of geochemistry, mineralogy, petrology, technical, experimental and applied mineralogy, and environmental sciences. Mineralogia (formerly Mineralogia Polonica) is an English language journal with 50 years long tradition. The journal’s subtitle, Geochemical, Mineralogical and Petrological Research, indicates the open character of the journal. The regular series Mineralogia is accompanied by the irregular series, including Mineralogia - Special Papers (containing conference abstracts) and Thematic Collections.    Publications in the scope of widely understood mineralogical sciences (mineralogy, petrology, geochemistry, environmental sciences, applied mineralogy, etc.)   Original research and review papers, letters (a short research paper), short notes (a brief communication), book reviews, and letters to editors with comments on papers published in Mineralogia    First issue of Mineralogia Polonica, the official Journal of the Mineralogical Society of Poland, was published in 1970 soon after foundation of the Society in 1969. Mineralogia Polonica, publishing in English from its beginning, has been very important for development of mineralogical sciences in Poland, exchange of scientific journals and international collaboration. Based on a long discussion with our colleagues from abroad we have noticed that the title suggests that the journal is focused on local mineralogical problems from Poland. To avoid this misunderstanding we have decided to modify the title and accordingly the journal cover. The new and simple title Mineralogia (with subtitle Geochemical, Mineralogical and Petrological Research) indicates an open character of the journal. We intend to publish original papers, review papers and short notes from broad fields of geochemistry, mineralogy, petrology, technical, experimental and applied mineralogy, environmental geochemistry and mineralogy. We have also decided to introduce changes in the organization of our Editorial Board to ensure high scientific level of journal and relatively short time-span between paper submission and publication.   The journal facilitates communication and promotes scientific research in the scope of:    descriptive mineralogy   experimental mineralogy   igneous petrology   metamorphic petrology   sedimentary petrology   hard rock geochemistry   geochronology and petrochronology   environmental mineralogy and geochemistry    Why subscribe and read    excellent source of outstanding interdisciplinary research papers in mineralogy, petrology, geochemistry and related disciplines;   over fifty years of publishing;   offers high-quality electronic publications (eISSN 1899-8526);   special issues publishing reviewed abstracts from conferences co-organized by the Mineralogical Society of Poland;    Why submit    fast, fair, and constructive single-blind peer review and editing;   no processing and no publication charges;   language-correction services for authors from non-English speaking regions;      Archiving   Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.   Plagiarism Policy   The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process.   Funding   Authors should list all funding sources in the Acknowledgments section.   ORCID   Mineralogia journal requires ORCID.   Ethical considerations   This journal follows the basic principles of the publishing process as documented by the Committee on Publication Ethics (COPE). The COPE’s guidelines focus mainly on issues related to publication in the medical literature; thus, not all the points are relevant to the Mineralogia journal. Although the essential ethical concerns considered while publishing in Mineralogia align with the COPE guidelines, Mineralogia is not bound by their defined processes.   Mineralogia otrzymała dofinansowanie z MNiE na lata 2022-2024 w ramach programu Rozwój czasopism naukowych (RCN/SN/0190/2021/1).   Ministry of Science and Higher Education co-financed Mineralogia in 2022-2024 as part of the Development of Scientific Journals call (Rozwój czasopism naukowych; RCN/SN/0190/2021/1). 