Results 41 to 50 of about 30,387 (283)

Constraints of magmatic oxidation state on mineralization in the Beiya alkali-rich porphyry gold deposit, western Yunnan, China

open access: yesSolid Earth Sciences, 2017
The Beiya gold deposit is the biggest Cenozoic gold deposit in the Jinshajiang-Ailaoshan alkali-rich porphyry metallogenic belt within the Sanjiang region. Porphyry intrusions are widely distributed at the Beiya deposit. In this study, we investigate the
Xue-Quan Gao   +4 more
doaj   +1 more source

Platinum-group elements (PGE) in the New Afton alkalic Cu-Au porphyry deposit, Canadian Cordillera, II: PGE distribution and models for the hydrothermal coprecipitation of Co-Ni-Pd-Pt in pyrite

open access: yesFrontiers in Earth Science, 2023
The first part of this article can be found here: 10.3389/feart.2023.819129 (DOI). Occurrences of significant concentrations of platinum-group elements (PGE) in porphyry deposits have seen limited attention and the geochemical controls on their ...
Samuel J. Robb   +3 more
doaj   +1 more source

Prospectivity mapping for high sulfidation epithermal porphyry deposits using an integrated compositional and topographic remote sensing dataset [PDF]

open access: yes, 2019
© 2019 Elsevier B.V. The targeting and discovery of epithermal porphyry mineral deposits can be enhanced using a structured quantitative methodology to analyse the distribution of ore deposits and model their spatial association with exploration evidence
Ganas, Athanassios   +2 more
core   +1 more source

The content of copper and heavy metals in the multilayer soil mud from the Buchim lake under the Buchim mine's waste dump, Republic North Macedonia [PDF]

open access: yesTehnika, 2020
The intense mineral extraction in mining areas during the last several decades has produced a large amount of waste material and tailings, which release toxic elements to the environment.
Serafimovski Todor S.   +2 more
doaj  

Apatite in porphyry systems and its applications in mineral exploration [PDF]

open access: yes, 2021
New techniques in exploration geochemistry are required to reduce the increasing amount of time and resources consumed during exploration of porphyry deposits.
Brugge, Emily
core   +1 more source

Travailler pour l'empereur

open access: yesLes Nouvelles de l’Archéologie, 2016
The recent excavations at Samut have confirmed the evidence of Agatharchides on the use of forced labour in the Ptolemaic gold-mines. On the other hand, there is almost no evidence for the presence of prisoners in the imperial quarries at Mons Claudianus
Hélène Cuvigny
doaj   +1 more source

Qian'echong low-F porphyry Mo deposits in the Dabie Mountains, central China

open access: yes, 2015
The Qian'echong Mo deposit is a large porphyry Mo deposit located in the northwest Dabie Mountains, central China, with proven Mo reserves of 741 Mt at 0.081%.
Mi, Mei, Sun, Wei-dong, Li, Cong-ying
core   +1 more source

Origin of porphyry dolomite in the 5th sub-member of the 5th member of Ordovician Majiagou Formation (M55sub-member), Ordos Basin

open access: yesShiyou shiyan dizhi, 2022
Large number of heterogeneous porphyry dolomites have been found in the 5th sub-member of the 5th member of Ordovician Majiagou Formation (M55 sub-member) in the central and eastern parts of Ordos Basin, and many drilled wells have shown good oil and gas
Huihong LIAO   +7 more
doaj   +1 more source

Affirmation and Negation: Reading Avicenna’s Al-‘Ibara Alongside Hellenistic Commentators [PDF]

open access: yesNazariyat: Journal for the History of Islamic Philosophy and Sciences, 2022
The relation of priority and posteriority between the affirmation and negation, which Aristotle put forth in Peri Hermêneias, has had some important consequences in terms of logical attribution and judgement.
E. Burak Şaman
doaj  

An Introduction to Aristotle's Philosophy of Logic [PDF]

open access: yesحکمت و فلسفه, 2008
The philosophy of logic is a posterior science, which examines the philosophical principles of logic as well as the matters derived from the logical debates.
gholamreza zakyani
doaj   +1 more source

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