Results 71 to 80 of about 9,544 (227)
Giant Porphyry Copper Deposits Caused by a Slab Jamming in the Mantle Transition Zone
Terra Nova, Volume 38, Issue 2, Page 106-115, April 2026.ABSTRACT Two giant porphyry copper deposits in the Southern Central Andes formed during the Miocene–Pliocene transition when a bend in the subducting Juan de Fernández hotspot chain jammed in the mantle transition zone, causing mega‐scale slab‐kinking. This geometry implies mechanical resistance that caused East–West compression and eventually a thrust‐
Nipaporn Nakrong +5 more
wiley +1 more source
The relation between Cu/Au ratio and formation depth of porphyry-style Cu-Au ± Mo deposits [PDF]
, 2018 Constraints on gold and copper ore grades in porphyry-style Cu-Au ± Mo deposits are re-examined, with particular emphasis on published fluid pressure and formation depth as indicated by fluid inclusion data and geological reconstruction.
Heinrich, Christoph +2 more
core
New Zealand's Second Meteorite: Makarewa (find, L4, S5, W2)
New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.One of the most remarkable discoveries of a meteorite in New Zealand was that of Makarewa. Discovered in 1879, Makarewa is a ‘find’ that was uncovered a metre below the surface of a clay bank during excavation works for a train line in the southern South Island.
Mia R. E. Boothroyd +3 more
wiley +1 more source
Explorable and economically attractive mineral deposits in the Siberian and Far Eastern Federal Districts of Russia [PDF]
, 2018 Purpose. Selection of the most explorable mineral deposits in the Siberian and Far Eastern Federal Districts of the Russian Federation as investment projects. Methods.
Boyarko, G
core +1 more source
Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.Abstract The subduction of the Paleo‐Pacific Plate beneath the NE Asian continental margin induced extensive magmatism, providing an excellent opportunity to investigate the interplay between plate dynamics, arc magmatism, continental crust formation, and porphyry mineralization.
Honghui Wang +5 more
wiley +1 more source
Systematization of u-pb zircon ages of granitoids from the copper porphyry deposits on the urals
Литосфера, 2017 There is a generalization of U-Pb age of zircons from the copper-porphyry deposits of the eastern slope of the Urals. Approved reserves of the largest ones are about 1.4-1.8 Mt of Cu (at an average content of 0.4-0.6 wt % of Cu).
Anatolii I. Grabezhev +3 more
doaj +2 more sources
The Significance of Magnetic Fabrics Preserved in Hydrothermally Altered Rocks
Journal of Geophysical Research: Solid Earth, Volume 131, Issue 3, March 2026.Abstract Anisotropy of Magnetic Susceptibility (AMS) and Anisotropy of Magnetic Remanence (AMR) are critical petrofabric tools for investigating the evolution of volcano‐magmatic, tectonic, and surface process systems. These highly sensitive techniques can distinguish multiple magnetic fabrics within individual samples, crucial in assessing archives of
Ben Latimer +3 more
wiley +1 more source
Why large porphyry Cu deposits like high Sr/Y magmas? [PDF]
Scientific Reports, 2012 Porphyry systems supply most copper and significant gold to our economy. Recent studies indicate that they are frequently associated with high Sr/Y magmatic rocks, but the meaning of this association remains elusive. Understanding the association between high Sr/Y magmatic rocks and porphyry-type deposits is essential to develop genetic models that can
Chiaradia, Massimo +3 more
openaire +5 more sources
Drelów, the 13th and latest meteorite fall in Poland—A typical L6 chondrite with shock veins
Meteoritics &Planetary Science, Volume 61, Issue 3, Page 466-486, March 2026.Abstract On Tuesday, February 18, 2025, at 18:04:14 local time, residents of Poland observed a bright fireball registered by many Polish fireball stations belonging to the Skytinel Network established a few months before by Mateusz Żmija. Thus, the meteoroid's orbit, atmospheric trajectory, and the strewn field were calculated, and over 70 fragments ...
Addi Bischoff +18 more
wiley +1 more source
Two-sided asymmetric subduction; implications for tectonomagmatic and metallogenic evolution of the Lut Block, Eastern Iran [PDF]
, 2011 West directed subduction zones show common characteristics, such as low structural elevation, deep trench, steep slab and a conjugate back-arc basin that are opposite to those of the east directed subduction zones.
Arjmandzadeh, R. +5 more
core +2 more sources