1,331 research outputs found
New structural data reveal benleonardite to be a member of the pearceite-polybasite group
No full textNHM Repositor
Discussion on “Syn-metamorphic sulfidation of the Gamsberg zinc deposit, South Africa” by Stefan Höhn, Hartwig E. Frimmel, and Westley Price
No full textHöhn et al. (2021) proposed that the giant Gamsberg Zn deposit, South Africa, initially formed as a sedimentary exhalative (SEDEX) deposit during the Mesoproterozoic and was subsequently oxidized near surface. The oxidized ore was then supposedly sulfidized by sulfur-rich metamorphic fluids during and after upper amphibolite facies metamorphism. We view this model as untenable for various reasons and suggest that the Gamsberg deposit and others in the Aggeneys-Gamsberg district (Swartberg, Broken Hill-Deeps, Big Syncline) are metamorphosed clastic SEDEX deposits rather than having formed by synmetamorphic sulfidation processes.This is a manuscript of an article published as Cawood, T.K., Rozendaal, A. & Spry, P.G. Discussion on “Syn-metamorphic sulfidation of the Gamsberg zinc deposit, South Africa” by Stefan Höhn, Hartwig E. Frimmel, and Westley Price. Miner Petrol (2023). https://doi.org/10.1007/s00710-023-00821-6. Posted with permission
Structure and metamorphic setting of base metal mineralisation in the Kanmantoo Group, South Australia
No full textBase metal mineralisation occurs at several locations within the regionally metamorphosed Kanmantoo Group on the southeastern flank of the Mount Lofty Ranges between Kanmantoo and Strathalbyn, 50 km southeast of Adelaide. Sulphide mineralisation is of three main types (Seccombe et al.,1985): 1. copper deposits, at the Kanmantoo and Bremer mines, South Hill prospect and several minor occurrences 2. lead-zinc deposits at Aclare, Wheal Ellen, Strathalbyn, St. Ives, Scott's Creek, and Glenalbyn mines 3. pyrite-pyrrhotite mineralisation of the Nairne pyrite deposit and many other pyritic schist units within the Kanmantoo Group.This proceeding is published as Spry, P.G., Schiller, J.C., and Both, R.A., 1988, Structure and metamorphic setting of base metal mineralisation in the Kanmantoo Group, South Australia. The AuslMM Bulletin and Proceedings, v. 293, p. 57-65. Posted with permission.</p
Belief and Ageing: Spiritual pathways in later life
No full textBased on 40 years' interviewing experience, this book illustrates the variety of religious, spiritual and other beliefs held by older people. It provides models of research procedure, especially in the context of bereavement. Participants include not only British Christians, but also Muslims, Humanists and witnesses of the Soviet persecution of religion. The author argues that both welfare professionals and gerontologists need to pay far more consideration to belief as a constituent of well-being in later life. The book looks to the future and increasing diversity of choice in matters of belief among Britain and Europe's older citizens as a consequence of immigration and globalisation
Tanggung Jawab Hukum Terhadap Pelaksanaan Perjanjian Kerja Musiman di P.G Mojo Sragen
No full textIn a certain time work agreement involving two parties, namely the P.G Mojo Sragen party and the worker, it is called a reciprocal agreement and therefore creates rights and obligations for the parties. If in the implementation of the rights and obligations between P.G Mojo Sragen and workers, one of the parties does not carry out their achievements, it will result in legal liability. The purpose of this study was to determine the process of agreement between P.G Mojo Sragen and workers, the applicable regulations and the rights and obligations of a certain time work agreement between P.G Mojo Sragen and workers, as well as legal responsibility if one of the parties made a mistake from the work agreement. The method used in this study is a normative approach because in this study, which are legal rules, legal principles in legal responsibility between P.G Mojo Sragen and workers. The type of research used by the author in this research is descriptive research to clearly describe the legal responsibility between P.G Mojo Sragen and workers. The results of this study indicate that in the process of implementing a work agreement for a certain time, prior to the occurrence of the agreement, the administrative requirements and legal requirements in accordance with Article 1320 of the Civil Code are: (1) Agreeing (2) Legal Capability (3) A certain matter (4) An lawful cause. At the time the agreement was signed with a certain time agreement P.G Mojo Sragen with workers that had been made by P.G Mojo Sragen based on a standard agreement. After the agreement, a binding legal relationship arises and gives birth to rights and obligations. If in the implementation one of the parties does not fulfill its rights and obligations, then it must be responsible on the basis of default in accordance with Article 1243 of the Civil Code and if one of the parties violates the applicable law, it can be accounted for based on unlawful acts in accordance with Article 1365 of the Civil Code
Measuring Uncertainty
No full textThis article, authored by P.G. Moore for the Royal Statistical Society's website, provides well-defined exercises to assess the probabilities of decision-making and the degree of uncertainty. The author states the focus of the article as: "When analyzing situations which involve decisions to be made as between alternative courses of action under conditions of uncertainty, decision makers and their advisers are often called upon to assess judgmental probability distributions of quantities whose true values are unknown to them. How can this judgment be taught?" Moore provides five different exercises and even external reference for those interested in further study of the topic
Tellurides and bismuth sulfosalts in gold occurrences of Greece: mineralogical and genetic considerations
No full textPre-Tertiary to Tertiary gold deposits in Greece occur in a wide range of genetic types including volcanic massive sulfides, orogenic, intrusion-hosted, skarn, manto-, porphyry- and epithermal-type ores. Almost all of the gold mineralization hosts various Bi-tellurides and Bi-sulfosalts, which in addition to Au-Ag-tellurides, are indicators of specific physicochemical conditions of ore formation. The Bi-bearing mineralization can be subdivided into three groups regarding their spatial relationship to gold: (a) mineralization which lacks tellurides but includes Bi-sulfosalts and native gold, (b) mineralization where Bi-tellurides of the reduced-type (joseite-A, joseite-B, pilsenite) accompany Bi-sulfosalts, native bismuth and native gold, (c) deposits/prospects where Au-Ag-tellurides are abundant and Bi-tellurides and Bi-sulfosalts are absent. Bi-telluride and -sulfosalt mineralization in Greece underwent several stages of remobilization during successive accretionary episodes in active continental margins and arc terranes during the Carboniferous to Pleistocene.This proceeding is published as Voudouris, P., Spry, P.G., Melfos, V., and Alfieris, D., 2007, Tellurides and bismuth sulfosalts in gold occurrences of Greece: mineralogy and genetic considerations, in Kojonen, K. K., Cook, N.J., and V.J. Ojala (eds.), Au-Ag-Te-Se deposits, Proceedings of the 2007 Field Workshop (Espoo, Finland, August 26-31, 2007). Geological Survey of Finland Guidebook 53, p. 85-94.</p
Effects of Various Deicing Chemicals on Pavement Concrete Deterioration
No full textThe deleterious effects of deicers on concrete pavements and bridges have concerned concrete researchers for several decades. The present study experimentally investigates the effects of different deicers on concrete deterioration. Laboratory simulations of environmental conditions (wet/dry and freeze/thaw cycling) were conducted on highway concrete samples with various deicer chemicals (NaCl, CaClv MgC12, calcium magnesium acetate (CMA) of 5 different Ca/Mg ratios, Ca-acetate, and Mg-acetate). Each deicer produced characteristic effects on the concrete samples by physically and chemically altering the dolomite coarse aggregate, the dolomite coarse aggregate-paste interface, and cement paste. Chloride solutions commonly promoted decalcification of paste and altered ettringite to chloroaluminate. Magnesium-bearing deicer solutions ( e.g., CMA, Mg-acetate and MgC12) caused severe paste deterioration by forming brucite and noncementitious magnesium silicate hydrate. For acetate solutions, the effects caused by Ca-acetate on concrete deterioration was much less severe than those caused by Mg-bearing acetates. For the experimental conditions utilized herein, NaCl solution was the least deleterious to the cement paste and aggregate.This proceeding is published as Lee, H., Cody, A.M., Cody, R.D., and Spry, P.G., 2000, Effects of various deicer chemicals on pavement concrete deterioration. Mid-Continent Transportation Crossroads Symposium, Proceedings, Ames, Iowa, p. 151-155. Posted with permission.</p
Concrete Deterioration by Deicing Salts: An Experimental Study
No full textConcrete with dolomite coarse aggregate was obtained by coring existing Iowa highways. The concretes were of two types, those which were very durable under highway conditions and those which were low durability. Samples were experimentally deteriorated using wet/dry, freeze/thaw, and continuous soak conditions in solutions of magnesium chloride, calcium chloride, sodium chloride, magnesium acetate, magnesium nitrate, and distilled water in order to determine relative deterioration activities. Magnesium chloride was most destructive. Calcium chloride was next, and sodium chloride was relatively benign. Magnesium acetate produced severe crumbling and moderate fracturing, and magnesium nitrate caused moderately severe deterioration by crumbling and discoloration. Low durability concrete was somewhat more affected by distilled water freeze/thaw conditions than more durable material, but generally both types were severely damaged by magnesium and calcium salts. These results suggest that magnesium and calcium deicers may accelerate highway concrete deterioration.This proceeding is published as Cody, R.D., Cody, A.M., Spry, P.G., and Gan, G.-L., 1996, Concrete Deterioration by Deicing Salts:An Experimental Study. 1996 Semisesquicentennial Transportation Conference Proceedings, Ames, Iowa, p. 4-7. Posted with permission.</p
The Eucharist - Source and Summit of the Life and Mission of P.G. Frassati
No full textŻycie i działalność bł. P.G. Frassatiego bez wątpienia wskazuje na dar i tajemnicę Eucharystii. To właśnie sakrament Eucharystii był motorem działania włoskiego studenta, miłośnika górskich wypraw, a nade wszystko człowieka bez reszty oddanego ubogim i chorym – Apostoła Miłosierdzia. Pobożność eucharystyczna staje się źródłem rozumnej służby Bożej. „Jezus przychodzi do mnie w Komunii świętej każdego dnia, a ja Mu się odwdzięczam za to w dostępny mi sposób, odwiedzając Jego biedaków”. Pier Giorgio pokazał nam, że można kochać życie ze wszystkimi treściami, zadaniami i problemami, jakie niesie, a jednocześnie kierować się ku Bogu, który jest naszym odwiecznym celem.The author shows how the life of the blessed P.G. Frassati reveals the gift and mystery of the Eucharist. It was the grace of the Eucharist that gave him the motivation to act. This Italian student and lover of mountain expeditions was totally devoted to the disadvantaged and the sick; he was an apostle of divine mercy. Eucharistic devotion becomes the source of logiké latria. “Every day Jesus comes to me in Holy Communion and I must repay Him in whatever way I can by visiting His poor”. Despite the difficult tasks and problems that life involves, Pier Giorgio proved that it is possible to love it, keeping always in mind the long-term aim of drawing closer to God
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