Relevant bibliographies by topics / Porphyry

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  2. Dissertations / Theses
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  4. Book chapters
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Academic literature on the topic 'Porphyry'

Author: Grafiati
Published: 4 June 2021
Last updated: 28 July 2024

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Journal articles on the topic "Porphyry"

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Гарин, С. В. "Minimal Categorical System and Predication Theory In Porphyry." Logical Investigations 23, no. 1 (May 4, 2017): 140–50. http://dx.doi.org/10.21146/2074-1472-2017-23-1-140-150.

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The article considers some problematic aspects of Porphyry’s typology of Aristotle’s categories and the theory of predication. Minimal (_________) class of categories in Porphyry is revealed. The work has shed some light on the opposition between $\textit{explanation}$ and $\textit{description}$ (__________ / ___________) within the framework of ancient categorical logic. A fourfold pattern of predication theory in Porphyry is described. The study aims to illuminate the development of Porphyry’s predication theory towards the archaic doctrine of quantifiers. Particular attention is paid to Porphyry’s account of semantic relation between sets. The paper represents Porphyry’s nine kinds of class / item relationships. The article focuses on the awakening of academic interest to the logical heritage of Porphyry.
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Proctor, Travis W. "Daemonic Trickery, Platonic Mimicry: Traces of Christian Daemonological Discourse in Porphyry’s De Abstinentia." Vigiliae Christianae 68, no. 4 (September 18, 2014): 416–49. http://dx.doi.org/10.1163/15700720-12341180.

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Porphyry of Tyre’s discussion of daemons and animal sacrifice in De Abstinentia strays from traditional Platonic formulations of daemonic involvement in the Graeco-Roman cult. As a result, scholars have struggled to identify the intellectual pedigree for Porphyry’s daemonology. By contrast, I propose that Porphyry draws upon Christian Platonic daemonologies, best represented in the writings of Origen of Alexandria. To substantiate this hypothesis, I first outline the dissonance between Porphyry’s daemonology and his Hellenic predecessors, before outlining the several daemonological tenets he shares with Christian writers. Second, I note the extensive conceptual commonalities between Origen and Porphyry’s respective daemonologies, Finally, I reexamine Porphyry’s attribution of his daemonology to “certain Platonists,” a claim which, when read in light of Porphyry’s Vita Plotini, places Origen squarely within the intellectual circles from which Porphyry was drawing his daemonological discourse.
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Ramelli, Ilaria L. E. "Plagues and Epidemics Caused by D(a)emons in Origen and Porphyry and Potential Interrelations." Vox Patrum 78 (June 15, 2021): 89–120. http://dx.doi.org/10.31743/vp.12302.

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This essay will address how Origen, an early Christian writer, theologian, and pastor, referred to plagues, epidemics, and misfortunes, and how he construed these phenomena in his theology, literary works, and pastoral practice. A comparison with Porphyry will be offered, who likely drew part of his daemonology from Origen. Those responsible for plagues in both Origen’s philosophical theology and in Porphyry’s philosophy are δαίμονες (demons or fallen angels for Origen, daemons for Porphyry; Origen knew and referred to the two views). Porphyry’s attribution of his daemonology to “certain Platonists” who “divulged” these theories probably alludes to Origen and situates Origen within the Platonic school. I suspect that Porphyry was influenced by Origen’s demonology in general and possibly by On Daemons, if his. Porphyry’s terminology of “divulging” corresponds to that used in his anecdote about Origen who, notwithstanding the oath not to divulge Ammonius’ esoteric doctrines, nevertheless did so in On Daemons and The King Is the Only Creator. This indirectly confirms that Porphyry was speaking of the same Origen. Porphyry’s conviction that evil daemons are responsible for plagues, epidemics, and natural disasters is the same as Origen’s in Contra Celsum, which Porphyry knew. Origen was aware that spiritual plagues are worse than physical ones, that misfortunes mostly befall the just, and took over Jesus’ criticism of the ancient view of misfortunes as divine punishments for an individual or his parents or ancestors.
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Callanan, Christopher K. "A rediscovered text of Porphyry on mystic formulae." Classical Quarterly 45, no. 1 (May 1995): 215–30. http://dx.doi.org/10.1017/s0009838800041811.

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Students of later Platonism know well the significant role Porphyry played in the development of what we now call Neoplatonism. His own biography of Plotinus makes clear that we probably owe the very existence of the majority of Plotinus' written works to Porphyry's nagging. Having cajoled the master into penning a large number of works during his latter years, Porphyry then edited and published them, giving them the title Enneads which they have since borne. We must, of course, take Porphyry's claims regarding the importance of his own influence with a grain of salt. Still, with the sole exception of Plato himself, no figure in the Platonic tradition had ever enjoyed Plotinus' good fortune in the transmission of his complete works, and none would again, for which we clearly have Porphyry to thank.
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Redwood, Stewart D. "The Origin of the Porphyry Deposit Name: From Shellfish, Tyrian Purple Dye, and Imperial Rome to the World’s Largest Copper Deposits." SEG Discovery, no. 118 (July 1, 2019): 1–15. http://dx.doi.org/10.5382/segnews.2019-118.fea.

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Abstract The porphyry deposit name has a long and fascinating etymological history of over 3,000 years. “Porphyry” is derived from the ancient Greek word porphyra (πoρϕύρα), or purple. It was originally applied to a rare purple dye, Tyrian purple, extracted by the Phoenicians from murex shells. It was later applied to a prized purple porphyritic rock, Imperial Porphyry or Porfido rosso attico, quarried by the Romans from Mons Porphyrites in the Eastern Red Sea hills of Egypt from the first to fifth centuries A.D., and used as a monumental stone in Imperial Rome and Byzantium (Istanbul). The name evolved in the field of igneous petrology to include all rocks with a porphyritic texture, regardless of their color. Mining of the first porphyry copper deposits, which were originally called disseminated or low-grade copper deposits, started in 1905. As a result of the close spatial and genetic relationship to porphyry stocks, they became known as porphyry copper deposits. The term was first used by W. H. Emmons in his 1918 textbook The Principles of Economic Geology, but it was originally used more as an engineering and economic description, as in Parsons’ 1933 book The Porphyry Coppers. It was slow to catch on in the geological literature. It was first used in the title of a paper in Economic Geology in 1947 but did not gain widespread use until the 1970s, following the publication of seminal papers on porphyry models and genesis by Lowell and Guilbert (1970) and Sillitoe (1972, 1973).
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Menn, Stephen. "On the Title of Porphyry’s Categories Commentary Πρὸς Γεδάλειον." Phronesis 62, no. 3 (June 6, 2017): 355–62. http://dx.doi.org/10.1163/15685284-12341331.

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Simplicius cites Porphyry’s lost greater commentary on the Categories by the name of its addressee: Πρὸς Γεδάλειον. It has been assumed that we know nothing about Gedalius, and even suggested that he may have been a fictional construct. But his name is Jewish, and Porphyry had no reason to make up a Jewish addressee. It was extremely rare for Greek pagan texts to be dedicated to a Jewish addressee. But Porphyry had an unusual degree of involvement with Judaism. I collect the evidence, and make a tentative proposal about the context for Porphyry’s dedicating this work to Gedalius.
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Svetlov, Roman, and Dmitry Shmonin. "Porphyry, Chaldaism, Judaism." ΣΧΟΛΗ. Ancient Philosophy and the Classical Tradition 17, no. 2 (2023): 866–74. http://dx.doi.org/10.25205/1995-4328-2023-17-2-866-874.

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The article seeks to explain the issue of why Porphyry of Tire, the first thinker introducing the discourses of the «Chaldean oracles» into Platonism, did not integrate Chaldaism and Judaism in his ideas on the nature of barbarian "theologies". For example, Julian the Apostate had accomplished such integration in his “political theology”. In the authors' opinion the reason for Porphyry's caution was his assessment of theurgy and its role in the genuine piety. The well-known discussion on the efficacy of theurgy in Porphyry's «Letter to Anebon» and «On the Egyptian Mysteries» of Iamblichus shows us two different modes of understanding of the Chaldean wisdom. Meantime, focusing on Iamblichus' approaches, Julian achieved this integration.
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Muscolino, Giuseppe. "Porphyry and Black Magic." International Journal of the Platonic Tradition 9, no. 2 (September 11, 2015): 146–58. http://dx.doi.org/10.1163/18725473-12341313.

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In the De abstinentia (ii, 41, 5) Porphyry is the first philosopher to give an exact definition of goeteia or black magic saying: “All black magic is accomplished through the opposite sort [i.e. evil] daemons.This paper will be presented in two parts: in the first part, there is the description about the difference between Magic—the sacred science of the Persian Magi (De abstinentia iv, 16, 1)—, and the black magic (De abstinentia ii, 41, 5); in the second part, using Porphyry’s definition of black magic and other philological data, it’s shown that Porphyry was not merely a philosopher interested in black magic in a theoretical manner, but also a practicing sorcerer.
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Vashchenko, Priest Andrey. "Features of the ecclesiological discourse of St Porphyry Kavsokalivit." Issues of Theology 4, no. 3 (2022): 539–48. http://dx.doi.org/10.21638/spbu28.2022.312.

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The paper analyzes the approach of St Porphyry Kavsokalivit to ecclesiological issues, in particular his central statement, “The Church is eternal and uncreated”. An attempt to determine the origins and logical justification of this concept is made. The emergence of St Porphyry’s unusual theological formula relates to the literal interpretation of the New Testament metaphor of the Church as the Body of Christ (Eph 1:23, 1 Cor 12). A specific feature of St Porphyry’s ecclesiological discourse is the affirmation of sameness of the Church and Christ, the Church and God, the Church and the Holy Trinity. The relationship of his theological ideas with the ecclesiological constructions of some Christian writers (St Epiphanius of Cyprus) is also shown. Along with the original approach from a theological point of view, St Porphyry Kavsokalivit is quite traditional when he talks about the Church in practical terms, about its significance for salvation and the canonical structure of Christianity. The St Porphyry’s idea of Church is more mystical than theological. His thought is based not on rationalization, but on a subjective experience of the “churchness”. Given the dogmatic uncertainty in ecclesiology in the Orthodox Church, the contradictory and unusual concept of the eternal and uncreated Church of St Porphyry can be qualified as a private theological opinion.
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Costa, Cristina D'Ancona. "Porphyry, Universal Soul and the Arabic Plotinus." Arabic Sciences and Philosophy 9, no. 1 (March 1999): 47–88. http://dx.doi.org/10.1017/s0957423900002605.

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Scholars working in the field of Graeco-Arabic Neoplatonism often discuss the role Porphyry, the editor of Plotinus, must be credited with in the formation of the Arabic Plotiniancorpus. A note in thiscorpusapparently suggests that Porphyry provided a commentary to the so-calledTheology of Aristotle, i.e., parts of some treatises ofEnneadsIV-VI. Consequently, Porphyry has been considered as responsible for the (sometimes relevant) doctrinal shifts which affect the Arabic Plotinian paraphrase with respect to the original text. This article aims at submitting this hypothesis to trial on a specific doctrinal point where Porphyry parts company with Plotinus: the relationship between the Demiurgic Intellect and World Soul. The ancient doxographical sources testify that Porphyry, in his conviction to be in agreement with Plotinus, in fact parted company with him in so far as he merged the World Soul into the Demiurgic Intellect, while Plotinus always kept them apart. There are in theEnneadssome baffling passages where the role of Intellect as the Demiurge of the sensible world is not clearly distinguishable from the role of World Soul. Notwithstanding that, these passages in the Arabic paraphrase do not bear any trace of the characteristically Porphyrian merging of World Soul into Intellect. The Arabic paraphrase of Plotinus’ writings never confuses Intellect and World Soul, as Porphyry did. This fact seems to disprove, at least on this point, the hypothesis of Porphyry's intervention as the explanation for the doctrinal differences between the original Plotinus’ text and its Arabic tradition.
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Dissertations / Theses on the topic "Porphyry"

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Li, Yang. "Geochronology and fluid evolution of the Qulong porphyry system : implications for porphyry deposit formation." Thesis, Durham University, 2016. http://etheses.dur.ac.uk/11869/.

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Understanding the metal enrichment process and rate in porphyry Cu systems (PCS) is critical to underpin the genetic model of PCS and refine the template for exploration, of which robust temporal constrain is the key. In addition, fluid evolution paths constrained by bulk analysis potentially suffer problems of contamination. Based on detailed field geology and petrographic study, this PhD thesis addresses the timescales and fluid evolution process of the world class Qulong porphyry Cu-Mo deposit, Tibet, China, by applying high precision geochronology and high spatial resolution isotope analysis. A fluid inclusion study indicates that the bulk mineralization at Qulong was deposited between 425 and 280 oC under hydrostatic pressure conditions. The depth of formation of the Qulong porphyry Cu-Mo system is estimated at ~2.7 km, which implies ~2.3 km of erosion has occurred since its formation. Zircon CA-ID-TIMS U-Pb geochronology constrains the emplacement ages of the Rongmucuola pluton, the P porphyry and quartz aplite to 17.142 ± 0.014/0.014/0.023 (analytical/plus tracer/plus decay constant uncertainty), 16.009 ± 0.016/0.017/0.024 and 15.166 ± 0.010/0.011/0.020 Ma, respectively. Molybdenite ID-NTIMS Re-Os geochronology suggests that the bulk mineralization at Qulong was deposited through multiple shorted lived pulses (~ tens of kyrs) between 16.126 ± 0.008/0.060/0.077 and 15.860 ± 0.010/0.058/0.075 Ma, with a duration of 266 ± 13 kyrs. Quartz SIMS oxygen isotope analysis indicates a periodic interplay between meteoric and magmatic fluids and continuing increase of meteoric water from ~10 to ~25 % volume percent during the ore-forming process. As a result meteoric water is invoked as the main trigger for metal deposition at Qulong. The major conclusions of this study from Qulong are supported by numerical modelling, titanium diffusion and high precision studies, and have implications for understanding porphyry systems worldwide, for example, multiple and cyclic magmatic-hydrothermal fluid pulses cooled by meteoric water are fundamental for ore formation.
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Rappé, Charles J. "Porphyry and the Platonic-Aristotelian tradition." [S.l. : s.n.], 2002. http://www.freidok.uni-freiburg.de/volltexte/599.

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McFall, Katie Anne. "Critical metals in porphyry copper deposits." Thesis, University of Southampton, 2016. https://eprints.soton.ac.uk/412122/.

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Critical metals are elements essential to high-tech industry and green technology which are associated with a significant supply risk. Diversifying supplies of these elements is therefore a high priority. Porphyry copper deposits contain potentially economic enrichments of some of these elements, namely rhenium, platinum group elements (PGEs), bismuth and tellurium. This thesis investigates the source, transport mechanism and distribution of these critical elements in two post-collisional Tethyan porphyry deposits. The Muratdere Cu-Mo (Au-Re) porphyry deposit, Turkey, described here for the first time, contains two generations of molybdenite with contrasting Re concentrations. The early, Re-poor molybdenites have magmatic δ34SCDT values, while the late, vein hosted Re-rich molybdenite has δ34SCDT values matching those of the surrounding country rock suggesting that the additional Re has been sourced from hydrothermal fluid-country rock interaction. The Skouries Cu-Au porphyry deposit, Greece, is PGE, Te and Bi enriched. In contrast to Muratdere, Skouries is shown to be an orthomagmatic system hosted by a series of overprinting dykes, with the metal enrichment hypothesised to have been provided by periodic mafic recharge of a deeper source magma chamber. The mineralising fluids in Skouries are shown to have been highly oxidised and hypersaline with complex cation chemistry (Na, K, Fe, Mn and Ca), and with the overall fluid evolution progressing from an early CO2 rich fluid to a later brine. The PGEs in the deposit are located in the main hypogene mineralising veinsets, associated with potassic alteration, and are found to be hosted in bismuth and tellurium complexes. A variety of platinum group minerals are identified, including sopcheite (Ag4Pd3Te4) and sobolevskite (PdBi). LA-ICP-MS of fluid inclusions, combined with microthermometry, has shown gold, bismuth and palladium to be hydrothermally transported by high temperature ( > 500°C), high salinity ( > 65 wt% NaCl+KCl) and highly oxidised fluids, and a bismuth-tellurium collector model is proposed to allow concentration of palladium from under-saturated fluids into platinum group minerals. High semi-metal (Te and Bi) contents in porphyries are therefore proposed to be an indicator of PGE enrichment.
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Valencia, Victor A. "EVOLUTION OF LA CARIDAD PORPHYRY COPPER DEPOSIT, SONORA AND GEOCHRONOLOGY OF PORPHYRY COPPER DEPOSITS IN NORTHWEST MEXICO." Diss., Tucson, Arizona : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1085%5F1%5Fm.pdf&type=application/pdf.

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Wolfe, RC. "The Dinkidi Cu-Au porphyry : geology of the Didipio region and paragenesis of the Dinkidi Cu-Au porphyry deposit." Thesis, Royal Society of Tasmania, University of Tasmania Library Special and Rare Materials Collection, 2002. https://eprints.utas.edu.au/11283/2/Wolfe_-Whole.pdf.

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The Dinkidi Cu-Au porphyry deposit is located in northern Luzon, Philippines. The 110 Mt deposit is characterised by high gold grades (ave. 1.2 g/t Au and 0.5% Cu) and is one of only a few alkaline porphyry deposits to have been discovered outside British Columbia. Alkaline magmatism in northern Luzon is related to the Late Oligocene rifting event that formed the Cagayan Valley Basin, and to the final stages of west-directed subduction along the East Luzon trench. Subalkaline andesitic and trachytic lavas and minor volcaniclastic rocks of the Mamparang Formation were emplaced along the southwest margin of the Cagayan Valley Basin, and have been intruded by a series of alkaline plutons and stocks. The Dinkidi deposit is hosted within the multi phase Dinkidi Stock, which is in turn part of a larger alkaline intrusive body, the Didipio Igneous Complex. The Didipio Igneous Complex consists of: (I) an early composite clinopyroxene-gabbro-diorite-monzodiorite pluton; (2) the Surong clinopyroxene to biotite monzonite pluton; (3) the Cu-Au mineralised Dinkidi Stock, which comprises an early equigranular biotite-monzonite stock (Tunja Monzonite), a thin, variably-textured clinopyroxenesyenite (the Balut Dyke), and a monzosyenite porphyry (Quan Porphyry) that grades, in its core, into a crystal-crowded leucocratic quartz-syenite (Bufu Syenite); and (4) postmineralisation andesite dykes. Whole-rock chemistry indicates that the volcanic formations in the Didipio region become progressively more alkaline up stratigraphy, indicating that Late Oligocene rifting intermittently tapped an LILE-enriched mantle source that became progressively more LILE-enriched over time. Whole rock and mineral compositions indicate that all intrusions in the Didipio region were sourced from a common magma chamber, and were related by shallow level fractional crystallisation. Five main hydrothermal events are recognised in the Didipio region: (I) contact metamorphism and weak biotite-cordierite alteration is associated with emplacement of the early diorite phase; (2) K-silicate magnetite-biotite alteration, and subeconomic Cu-Au mineralisation associated with the emplacement of the Surong monzonite pluton; (3) intensely developed porphyry-style alteration and ore-grade Cu-Au mineralisation which is spatially and temporally associated with emplacement of the Dinkidi Stock; (4) an advanced argillic alteration assemblage, which has overprinted the Didipio Igneous Complex and is associated with subeconornic high-sulphidation style Cu-Au mineralisation; (5) late-stage unmineralised zeolite-carbonate veins, which are associated with post-mineral strike-slip faulting. At Dinkidi, emplacement of the Tunja Monzonite was temporally and spatially associated with the formation of a pervasive biotite-magnetite K-silicate alteration assemblage in the pre-mineral diorites. Emplacement of the Balut Dyke was associated with a calc-potassic style diopside-actinolite-K-feldspar-bornite alteration assemblage and associated vein stockwork. This quartz-free mineral assemblage is associated with high gold grades (2-8 g/t Au) and is typical of alteration assemblages found in quartz-undersaturated alkaline porphyry systems. Intrusion of the Bufu Syenite led to the formation of a quartz-sericite-calcite-chalcopyrite stockwork vein and alteration assemblage, which has overprinted the calc-potassic assemblage. The quartz stock work hosts the bulk of low grade mineralisation (1-2g/t Au) at Dinkidi and is typical of silica-saturated alkaline porphyry systems. A coarse-grained assemblage of quartz-actinolite-perthite (the 'Bugoy Pegmatite') formed as an apophysis on the Bufu Syenite, and was subsequently brecciated by late-stage faulting. High-level argillic and late-stage fault-related zeolite mineral assemblages have overprinted the porphyry-style hydrothermal assemblages. The calc-potassic assemblage is inferred to have formed at temperatures in excess of >600°C from a silica-undersaturated K-Ca-Fe brine. Fluid inclusion studies indicate that the quartz stockwork was emplaced at submagmatic temperatures (>600°C) from a quartz-saturated Na-K-Fe brine (>68 wt. % eq. NaCI) that contained up to 0.6 wt. % Cu and 4 wt. % Fe. Cooling to ~420°C and neutralisation by wall rock interaction lead to the precipitation of sulphides within the quartz stockwork. The quartz-bearing assemblage was emplacement at 2.9 to 3.5 km paleodepth, and was associated periods of overpressurisation and quartz growth disrupted by episodic depressurisation to near hydrostatic pressure conditions. The hydrothermal mineral assemblages at Dinkidi reflect the composition and degree of fractionation of the associated intrusions. Extensive fractionation within a feldspathoid-normative dioritic magma chamber is interpreted to have ultimately caused quartz saturation and the development of the late-stage syenite intrusions and related quartz stockwork mineralisation. The calcic, silica-undersaturated Balut Dyke (associated with the calc-potassic stockwork) does not fit this fractionation trend, and is interpreted to have formed by interaction between the late-stage syenitic melt and a co-magmatic mafic melt that underplated the siliceous magma chamber prior to formation of the Balut Dyke. A reversion to fractionation-dominated magmatic processes in the silicic magma chamber then lead to the intrusion of the quartz-saturated Quan Porphyry and Bufu Syenite. Ultimately, the residual mafic melt was emplaced as a series of late-stage andesite dykes. The Dinkidi porphyry Cu-Au deposit shows that it is possible for silica-undersaturated and silica-saturated styles of alkaline porphyry mineralisation to form in the same magmatic-hydrothermal system, given the right conjunction of geological processes. Exploration models for alkaline porphyry systems therefore need to be flexible enough to accommodate the possibility of silica-undersaturated and saturated mineralised zones forming in the same deposit. The strongly mineralised, variably textured Balut Dyke shares textural and genetic similarities with mineralised pegmatite dykes from midcrustal granitic environments. Highly Cu-Au mineralised 'pegmatitic' dykes should therefore also be considered as a viable exploration target in alkaline porphyry systems.
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Dickinson, Jenni Michelle. "Jura-triassic magmatism and porphyry Au-Cu mineralization at the Pine Deposit, Toodoggone District, North-central British Columbia." Thesis, University of British Columbia, 2006. http://hdl.handle.net/2429/3959.

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The Pine, Fin, and Mex porphyry Au-Cu ± Mo systems are all located within a 10 km² area in the Toodoggone district, along the eastern margin of the Stikine terrane in British Columbia. Multiple episodes of porphyry-style mineralization are associated with these three magmatic centres. The Fin monzogranite is the oldest dated pluton in the district, with a U-Pb zircon emplacement age of 217.8 ± 0.6 Ma. A cross-cutting main-stage quartz-pyrite-chalcopyrite ± molybdenite ± sphalerite vein gives an older Re-Os molybdenite mineralization age of 221.0 ± 1.4 Ma. Hence the vein probably cross-cuts a slightly older, undated magmatic phase. Lead isotope values for sulphide minerals from main-stage veins indicate that magmatic-derived fluids interacted with country rocks and possibly other fluids. The Pine quartz monzonite (U-Pb zircon emplacement age of 197.6 ± 0.5 Ma) intrudes, alters, and locally mineralizes Toodoggone Formation Duncan Member andesite tuff (U-Pb zircon age of 200.9 ± 0.4 Ma). High-grade (0.57 g/t Au and 0.15% Cu) mineralization occurs in main-stage quartz-magnetite chalcopyrite-pyrite veins and disseminated throughout the potassic alteration zone in the Pine quartz monzonite stock. Late-stage anhydrite-pyrite ± specular hematite ± chalcopyrite, quartz-pyrite ± chalcopyrite, and pyrite ± chalcopyrite veins and related phyllic alteration cross-cut earlier veins. Propylitic alteration occurs distal to the potassic core of Pine in the Fin monzogranite and Duncan Member andesite. Limited fluid inclusion data, in combination with S and Pb isotope values for veins and host rocks, suggest that the main-stage fluid was magmatic-derived and deposited metals at 430 to 550 °C and depths of about 5.5 km. Late-stage fluids were also probably derived from the Pine quartz monzonite but interacted with Takla Group country rock prior to metal deposition. Metals were deposited at temperatures of 330 to 430 °C and depths of about 5.0 to 5.5 km. The final mineralization phase of the Pine porphyry system is temporally constrained by the emplacement of weakly mineralized syenite dykes (U-Pb zircon age of 193.8 ± 0.5 Ma). The final stage of magmatism in the Pine-Fin-Mex area is defined by the emplacement of rhyolite dykes (U-Pb zircon age of 193.6±0.4 Ma).
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Puig-Pichuante, R. M. "Molybdeunum mineralization with emphasis on porphyry systems genesis and exploration." Thesis, Rhodes University, 1986. http://hdl.handle.net/10962/d1006840.

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Mo became very important in the last century, because of its sophisticated properties and its use in the new technology of alloys . Porphyry systems (porphyry Cu-Mo and Mo) contribute a significant proportion (90 - 95 per cent) to the Mo world's production. This type of deposit is associated mainly with Phanerozoic orogenic belts. Above 87per cent of the world resources are in the American Circumpacific belts , both Andean and Cordilleran . Ore grade in porphyry Cu-Mo range from 0,005 to 0,04per cent Mo, whereas in porphyry Mo grades range from 0,08 to 0,75per cent Mo . These deposits are associated with a magmatism which shows an evolution from calcic in island arcs, to calc-alkaline in magmatic back arcs, with an increase of the Mo content in the same direction. Porphyry Mo deposits display several features in common with porphyry Cu deposits. hydrothermal Similarities include nature of host alteration patterns and distribution of rock intrusives, ore minerals. An interesting difference is found in the Re contents of the molybdenite mineral. This element is higher in the molybdenites of porphyry Cu, than in those of the porphyry Mo. The ore genesis process begins involves partial melting, within enriched zones of the upper mantle and magma differentation, liquid state thermogravitational diffusion, magma convection and boiling. These processes progressively concentrate Mo in the fluids, which are released at some stage, into sulphidic hydrothermal systems, under complex geologictectonic conditions involving fracturing, brecciation and hydrothermal alteration. Major concentrations of the ore mineral are always associated with potassic alteration, and with late magmatic-early hydrothermal stages (Chilean and Western North American porphyries). Geological mapping and a close understanding of alteration and mineralization patterns, and lithogeochemistry are important tools for the exploration of porphyry Mo deposits. Geochemical prospecting, using soils, vegetation and water as sampling media, and regional aeromagnetic, gravity surveys, aerial photography and remote sensing, are us.
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Nickerson, Phillip Anson. "Post-Mineral Normal Faulting in Arizona Porphyry Systems." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/242354.

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In the Basin and Range province of southwestern North America, Oligocene and Miocene normal faults are superimposed upon the Late Cretaceous-early Tertiary magmatic arc. This study examines tilted fault blocks containing dismembered pieces of porphyry systems, including pieces below and peripheral to ore bodies, that are exposed at the modern surface. Features in the magmatic-hydrothermal porphyry systems are used to place constraints on the style of extension in Arizona, and reconstructions of extension are used to examine the deep and peripheral portions of porphyry systems to provide a more complete understanding of porphyry systems as a whole. The Eagle Pass, Tea Cup, and Sheep Mountain porphyry systems of Arizona are examined in this study. In all the study areas, previous interpretations of the style of extension involved strongly listric normal faults. However, similar amounts of tilting observed in hanging wall and footwall rocks, as well as structure contour maps of fault planes, require that down dip curvature on faults was minimal (<1°/km. Instead, extension is shown here to have occurred as sets of nearly planar, "domino-style" normal faults were superimposed upon one another, including in the Pinaleño metamorphic core complex. Reconstructions of Tertiary extension reveal that sodic (-calcic) alteration is occurs 2-4 km peripheral to, and greisen alteration is found structurally below and overlapping with, potassic alteration. In addition, a preliminary reconstruction of extension across the Laramide magmatic arc reveals that the geometry, as revealed by known porphyry systems, is of similar scale to that of other magmatic arcs. These results help further the debate surrounding competing models of continental extension, and combine with previous work to provide a more complete understanding of the geometries of Arizona porphyry systems at the district and arc scale.
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Mathur, Ryan Dilip. "Rhenium-osmium isotopes of base metal porphyry deposits." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/289216.

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This study uses Re-Os isotopes from sulfide minerals (molybdenite, pyrite, chalcopyrite, bornite, sphalerite, arsenopyrite, and galena) and magnetite from high (400-500°C) and low and low ( < 300°C) temperature mineralization assemblages associated with the intrusion of igneous rocks to trace the source of Os and by inference the other metals. The source of Os is used as a proxy for the source of copper and gold in these systems. Concentrations of Re-Os for all sulfides except molybdenite in various deposit types vary from 0.005-2 ppb Os and 0.120-500 ppb Re. Initial ¹⁸⁷Os/¹⁸⁸Os ratios derived from isochron plots ranges from 0.15-50. These data show interesting relationships among deposits of different styles within the district, region, and worldwide scales. On the district-deposit scale, Re-Os isotopes illustrate a complex behavior for the source of Os and by inference other transition and noble metals. The source of Os can be linked to one intrusive event, multiple intrusive events, and the sedimentary rocks into which the magmas intersect. On a regional scale, in the Andean Cordillera, Re-Os isotopes reveal a correspondence between the initial ¹⁸⁷Os/¹⁸⁸Os ratios from sulfides of the ore deposit and amount of copper present in porphyry copper deposits. Eleven deposits sampled from different crustal blocks and different mineralization ages form a trend in which deposits that contain large amounts of copper have less radiogenic ¹⁸⁷Os/¹⁸⁸Os initial ratios, suggesting a greater mantle component. Smaller deposits have more radiogenic Os suggesting greater crustal components. On a global scale, the significant observation for the deposits that form in arc environments is that all of the calculated initial ¹⁸⁷Os/¹⁸⁸Os ratios are greater then the chondritic mantle. This indicates that there must be a crustal source (recycled in a metasomatized mantle, lower/upper continental crust, or subducting slab) that contributes Os and by inference other metals present in porphyry coppers. Another feature of the data set is that gold-bearing systems in arc environments associated with porphyry intrusions have crustal signatures (0.5-2.5) regardless of the style of the related ore body. For instance, the low/high sulfidation epithermal gold systems in Bucaramanga Columbia (¹⁸⁷Os/¹⁸⁸Os initial 1.2), the massive sulfide ores of the Grasberg, Irian Jaya (¹⁸⁷Os/¹⁸⁸Os initial 0.7--1.2), and Cu-Au skarns in the Hedley District, British Columbia (¹⁸⁷Os/¹⁸⁸Os initial 1.7-2.5) all have large crustal components.
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Tomlinson, David Harris. "Nature and Origin of Fissure Ore at the Porphyry-Epithermal Transition Zone of the Bingham Canyon Porphyry Cu-Au-Mo Deposit, Utah." BYU ScholarsArchive, 2019. https://scholarsarchive.byu.edu/etd/7544.

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Late-stage fissure-filling ore at the world class Bingham Canyon, Utah, porphyry copper deposit has long been recognized, but poorly studied. Physical and chemical characterization of the Pb-Zn-Cu-Ag-Au mineralized fissures in the porphyry-epithermal transition zone provides insight into the origin, timing, and controls of ore deposition. These sheared sulfide-rich fissures are dominated by pyrite and multiple generations of quartz, with lesser amounts of other sulfides and gangue minerals. Au (0.27 to 4.61 ppm) provides the most value to the ore in the transition zone. Host rocks include Eocene monzonite and Paleozoic limestone and quartzite"”all of which can contain economic ore bodies. Associated alteration is predominantly sericitic and argillic. Mineralization into the wall rocks is restricted, not exceeding 1.5 m from the fissure margins. Mineral assemblages vary with distance from the center of the main Cu-Mo deposit and the modal abundances are dependent on host rock. The appearance of both galena and sphalerite (and tennantite to an extent) mark the transition from a porphyry to an epithermal environment. This is accompanied by an increased concentration of chalcophile trace elements in sulfides as determined by EMPA and LA-ICP-MS. Significant hosts of Ag include galena and tennantite, while Cu is hosted primarily in chalcopyrite, tennantite, and sphalerite. Gold does not appear to be hosted in solid solution, but may be focused along fractures or inclusions in pyrite. δ3434S values of fissure pyrite has a narrow range (+2.3 to 3.4‰), while δ18O of quartz is more variable and high (+11.5 to 14.0‰) relative to typical hydrothermal quartz. This can be explained by increased fractionation at lower temperatures in the magmatic fluids, which could have additionally mixed with exchanged 18O-rich meteoric water. Ore grades improve with distance from the center of the deposit; however, this is accompanied by higher concentrations of elements (Pb, As, Bi, etc.) undesirable for downstream processing. The mineralized fissures were created sequentially throughout the formation of the deposit. Initial joints probably formed as a result of the intrusion of a barren equigranular monzonite. The NE orientation of the joints was controlled by the regional stress field, which is more apparent distal to the center of the deposit. A quartz monzonite porphyry then intruded, dilating the joints to allow precipitation of quartz and then pyrite during the Cu-Au-stage of mineralization in the main ore body. After dike-like intrusions of latite porphyry and quartz latite porphyry intruded, galena, sphalerite, and pyrite precipitated to form the Pb-Zn-Ag mineralization. This was followed by late precipitation of chalcopyrite and tennantite (and likely Au mineralization).
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Books on the topic "Porphyry"

1

Porphyry. Porphyry Introduction. Oxford: Oxford University Press, 2003.

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Ahmad, Mahmood U. Porphyry copper in Pakistan. Quetta: Geological Survey of Pakistan, 1992.

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Aristotle's Categories and Porphyry. Leiden: E.J. Brill, 1988.

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Berchman, Robert M. Porphyry against the Christians. Leiden: Brill, 2005.

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Porphyry. Select works of Porphyry. Frome, Somerset, UK: Prometheus Trust, 1994.

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1923-, Tooker Edwin Wilson, ed. Gold in porphyry copper systems. [Washington D.C.]: U.S. G.P.O., 1990.

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Stegen, Ralph J., Robert Cal Callaghan, Robert Cal Callaghan, and Ralph J. Stegen, eds. Porphyry Molybdenum Deposits in Colorado I. Climax Porphyry Molybdenum Deposits II. Henderson Molybdenum Mine. Tulsa, Oklahoma, U.S.A.: SEPM Society for Sedimentary Geology, 2006. http://dx.doi.org/10.5382/gb.38.

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Learned, Robert Eugene. Analytical results and sample locality map of soil samples from the Tanama-Helecho porphyry copper district, Municipios of Utuado and Adjuntas, Puerto Rico. [Menlo Park, Calif.?]: U.S. Dept. of the Interior, Geological Survey, 1992.

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Mikhaĭlovich, Vlasov Georgiĭ, Institut tektoniki i geofiziki (Akademii͡a︡ nauk SSSR), and Dalʹnevostochnyĭ nauchno-issledovatelʹskiĭ institut mineralʹnogo syrʹi͡a︡., eds. Orudenenie porfirovogo tipa na Dalʹnem Vostoke. Vladivostok: Akademii͡a︡ nauk SSSR, Dalʹnevostochnoe otd-nie, In-t tektoniki i geofiziki, 1988.

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Heintze, Ludwig. Geologie und Geochemie der porphyrischen Stockwerk-Molybdän-Lagerstätte Tamboras, Zone La Negra (Peru). Hannover: Bundesanstalt für Geowissenschaften und Rohstoffe und den Geologischen Landesämtern in der Bunderepublik Deutschland, 1985.

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Book chapters on the topic "Porphyry"

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Misra, Kula C. "Porphyry Deposits." In Understanding Mineral Deposits, 353–413. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-3925-0_8.

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Knuuttila, Simo, David Piché, Pieter De Leemans, Stephen F. Brown, Fabrizio Amerini, Ian Wilks, Christopher Schabel, et al. "Porphyry, Arabic." In Encyclopedia of Medieval Philosophy, 1056–62. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-1-4020-9729-4_413.

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Bonadeo, Cecilia Martini, Angela Guidi, Antonella Straface, Roxanne D. Marcotte, Cecilia Martini Bonadeo, Samuel Noble, Emily J. Cottrell, et al. "Arabic Porphyry." In Encyclopedia of Medieval Philosophy, 88. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-1-4020-9729-4_44.

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D’Ancona, Cristina. "Porphyry, Arabic." In Encyclopedia of Medieval Philosophy, 1576–84. Dordrecht: Springer Netherlands, 2020. http://dx.doi.org/10.1007/978-94-024-1665-7_413.

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Li, Nuo, YongFei Yang, LaiMin Zhu, Jing Li, Franco Pirajno, and YanJing Chen. "Porphyry Mo Deposits." In Modern Approaches in Solid Earth Sciences, 159–361. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-4871-7_3.

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Pirajno, Franco. "Porphyry Systems and Skarns." In Hydrothermal Mineral Deposits, 325–74. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-75671-9_11.

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Yang, YongFei, Yan Yang, Guang Wu, Jing Li, and YanJing Chen. "Porphyry–Skarn Mo Systems." In Modern Approaches in Solid Earth Sciences, 363–516. Singapore: Springer Singapore, 2022. http://dx.doi.org/10.1007/978-981-16-4871-7_4.

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"Porphyry." In Dictionary of Geotourism, 483. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2538-0_1929.

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Karamanolis, George E. "Porphyry." In Plato and Aristotle in Agreement?, 243–330. Oxford University Press, 2006. http://dx.doi.org/10.1093/0199264562.003.0008.

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"Porphyry?" In On What Cannot Be Said, 62–74. University of Notre Dame Press, 2007. http://dx.doi.org/10.2307/j.ctvpj741c.8.

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Conference papers on the topic "Porphyry"

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Bargawa, Waterman Sulistyana, Anwar Safi’i, Mazda Aina Sukowati, and Sulfajar Asmaul. "Porphyry copper resource modeling." In 4TH INTERNATIONAL CONFERENCE ON EARTH SCIENCE, MINERAL AND ENERGY. AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0127833.

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Williams, David F. "Imperial Porphyry in Roman Britain." In XI International Conference of ASMOSIA. University of Split, Arts Academy in Split; University of Split, Faculty of Civil Engineering, Architecture and Geodesy, 2018. http://dx.doi.org/10.31534/xi.asmosia.2015/02.28.

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Gaynor, Sean, and Allen F. Glazner. "DID THE JOHNSON GRANITE PORPHYRY ERUPT?" In 112th Annual GSA Cordilleran Section Meeting. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016cd-274578.

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Cloos, Mark, and Stephanie Wafforn. "SUBDUCTION ZONES AND PORPHYRY COPPER DEPOSITS." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-285869.

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Keith, Stanley B., and Jan Rasmussen. "SUBDUCTION OF ARIZONA PORPHYRY COPPER DEPOSITS." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-340195.

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Woody, Kelsey, Sean Gaynor, Joshua M. Rosera, and D. S. Coleman. "LEAD AWAY FROM THE PORPHYRY: UNDERSTANDING THE SOURCE OF HYDROTHERMAL MINERALS IN THE QUESTA PORPHYRY MO DEPOSIT." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-336192.

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Li, Yang, and David Selby. "DECODING THE RHYTHMS OF PORPHYRY COPPER SYSTEMS." In GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-331174.

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Virmond, Adrianna, Cyril Chelle-Michou, and Jörn-Frederik Wotzlaw. "Zircon Petrochronology of behemothian porphyry copper systems." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.7661.

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Gerel, O., B. Batkhishig, B. Munkhtsengel, and A. Chimedtseren. "Porphyry type deposits associated with adakite magmas: Case study of porphyry Cu-Au and Cu-Mo deposits in mongolia." In 2013 8th International Forum on Strategic Technology (IFOST). IEEE, 2013. http://dx.doi.org/10.1109/ifost.2013.6617000.

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Rusk, Brian G. "HYDROTHERMAL FLUID EVOLUTION IN PORPHYRY-TYPE ORE DEPOSITS." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-286934.

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Reports on the topic "Porphyry"

1

Kirkham, R. V., and K. P. E. Dunne. World porphyry and porphyry-related deposit database. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/297319.

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Chapman, J. B., A. Plouffe, S. E. Jackson, J. J. Ryan, and T. Ferbey. Mineral markers of porphyry processes: regional and local signatures of porphyry prospectivity. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296487.

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Beckett-Brown, C. E., A. M. McDonald, and M. B. McClenaghan. Discovering a porphyry deposit using tourmaline: a case study from Yukon. Natural Resources Canada/CMSS/Information Management, 2023. http://dx.doi.org/10.4095/331349.

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As the exploration for porphyry Cu-Au-Mo deposits has become increasingly challenging, the development of more effective techniques directed at detecting buried deposits has become critical. One methodology is to focus on key minerals, one of which is tourmaline, a robust, ubiquitous mineral in most mineralized porphyry systems. Overall, a combination of physical and chemical characteristics including 1) macro-color, 2) morphology, 3) inclusion populations, and 4) trace-element compositions are useful in discriminating between porphyry- versus non-porphyry-derived (or related) tourmaline in surficial sediments (Beckett-Brown 2022). These features are applied to tourmaline obtained from stream sediment samples (n = 22) from 16 streams derived from the unglaciated terrain proximal to the Casino calc-alkaline porphyry Cu-Au-Mo deposit (Yukon Territory, Canada). The obtained tourmaline occurs as two distinct morphologies: 1) individual blocky to prismatic sub- to euhedral grains (Type 1), 2) aggregates of radiating prismatic to acicular sub- to euhedral grains (Type 2). Type 1 grains display trace-element contents that reflect mixed origins including a mineralized porphyry origin as well metamorphic and pegmatitic (background) environments. Type 2 grains almost exclusively exhibit porphyry-derived trace-element chemistries (i.e., high Sr/Pb ~150 avg. and relatively low Zn/Cu ~2.5 avg. values). In Canadian Creek, that directly drains from the Casino deposit, samples closest to the deposit contain &amp;gt;70% porphyry-derived tourmaline, while other streams in the region from unprospective drainage basins contain no porphyry-derived tourmaline. At the most distal sample site in Canadian Creek, ~20 km downstream from Casino, nearly 30% of the recovered tourmaline in the stream sediments is porphyry-related. This method has potential to be a strong indicator of prospectivity and applicable for exploration for porphyry Cu-Au-Mo systems in both unglaciated and glaciated terrains.
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Kirkham, R. V., and K. P. E. Dunne. World distribution of porphyry, porphyry-associated skarn, and bulk-tonnage epithermal deposits and occurrences. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211229.

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Kirkham, R. V., and K. P. E. Dunne. World distribution of porphyry, porphyry-associated skarn, and bulk-tonnage epithermal deposits and occurrences. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2000. http://dx.doi.org/10.4095/211230.

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Kirkham, R. V., and W. D. Sinclair. Porphyry copper, gold, molybdenum, tungsten, tin, silver. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1995. http://dx.doi.org/10.4095/208014.

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McClenaghan, M. B., M W McCurdy, R G Garrett, C. E. Beckett-Brown, M. I. Leybourne, S. G. Casselman, and P. Pelchat. Heavy mineral and geochemical signatures of porphyry copper mineralization: examples from the Casino porphyry Cu-Au-Mo deposit, Yukon. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/327987.

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Rogers, N., A. Plouffe, J. B. Chapman, M. B. McClenaghan, D. A. Kellett, and R. A. Anderson. Identifying new vectors to hidden porphyry-style mineralisation. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2015. http://dx.doi.org/10.4095/296471.

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McClenaghan, M. B., M. W. McCurdy, R. G. Garrett, C. E. Beckett-Brown, M. I. Leybourne, S. G. Casselman, and P. Pelchat. Mineral and geochemical signatures of porphyry copper mineralization: work in progress for the Casino Cu-Au-Mo-Ag porphyry deposit, Yukon. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2019. http://dx.doi.org/10.4095/313667.

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Sinclair, W. D., I. R. Jonasson, R. V. Kirkham, and A. E. Soregaroli. Rhenium and other platinum-group metals in porphyry deposits. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2009. http://dx.doi.org/10.4095/247485.

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