Results 91 to 100 of about 30,387 (283)
A Crazy Idea: Ibn Sīnā on Hylomorphism, the Elements, Mixture and Evolutionary Processes
Theoria, EarlyView.ABSTRACT Ibn Sīnā (c. 973‐1037), the Avicenna of Latin fame, developed a unique theory of the elements and their status in mixtures that severely challenged the views of earlier natural philosophers and in its turn was severely challenged by later Latin Schoolmen in the West.
Jon McGinnis
wiley +1 more source
Porphyry copper enrichment linked to excess aluminium in plagioclase
, 2016 Porphyry copper deposits provide around 75%, 50% and 20% of world copper, molybdenum and gold, respectively1. The deposits are mainly centred on calc-alkaline porphyry magmatic systems2, 3 in subduction zone settings1.
RJ Herrington (16105466) +2 more
core +2 more sources
Porphyry and Epithermal Au-Cu Systems of the Southern Caucasus and Northern Iran
Bulletin of the Mineral Research and ExplorationThis article presents tangible geological evidence for coexistence of porphyry copper and epithermal gold systems within single polygenic deposits and provides a paleothermophysical model for their origins.
Alexander G. Tvalchrelidze
doaj +1 more source
Homonymy; Aristotelian Definition and the Interpretations of Porphyry and Avicenna [PDF]
حکمت سینویAristotle, at the beginning of the Categories, provides a brief definition of homonym and synonym. Aristotelian and Platonic philosophers have engaged in interpreting, criticizing, and extending these Aristotelian definitions.
vahid khademzadeh
doaj +1 more source
Porphyry, tuff and loose specifications
, 1999 There is a common practice of using the terms Porphyry and Tuff interchangeably. The two materials are distinctly different in origin and resultant properties, appearance and\ud availability and should not be ...
Thomas, Glenn S.
core
, 2000 The Andacollo mining district is located in the Coquimbo region of Chile at 30°14’ south, 71°06’ west, some 55 km southeast of La Serena, at a mean elevation of 1030 m within a semi-arid hilly landscape.
Guzman, J. +2 more
core +1 more source
Frontiers in Earth ScienceThe Nenjiang-Heihe metallogenic belt of the northern Great Xing’an Range is renowned for Mesozoic epithermal Au deposits, however, apart from the Duobaoshan and Tongshan super-large porphyry deposits in the Paleozoic, no superlarge porphyry copper ...
Wang Zhuo +9 more
doaj +1 more source
Geosciences, 2018 A new porphyry Mo prospect has been discovered in the Aisymi-Leptokarya area, along the southern margin of the Byala Reka⁻Kechros metamorphic dome, south-eastern (SE) Rhodope metallogenic zone.
Evangelos Galanopoulos +7 more
doaj +1 more source
Low Abundances of Ultramafic Components in the Chang'e‐6 Landing Site Basalt and Ejecta Material
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract The South Pole‐Aitken (SPA) Basin, the Moon's largest impact structure, holds key insights into lunar evolution, prompting the Chang'e‐6 mission to return first samples for ground‐truth verification. Analysis of over 6,000 grains from the Chang'e‐6 soil returned from the SPA Basin reveals a composition dominated by clinopyroxene (26.5–32.9 vol.
Zhenbing She +20 more
wiley +1 more source
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 2, June 2026.Mordenite is a naturally occurring zeolite mineral that is the seventh most common zeolite mineral globally, forming at low temperatures (≥100°C) in hydrothermal systems. In New Zealand, extensive deposits of mordenite are commonly associated with areas of hydrothermal alteration, particularly in the Coromandel and Taupo Volcanic Zones.
Ayrton R. Hamilton +6 more
wiley +1 more source