Results 81 to 90 of about 220,175 (263)

Magnetic and Paleomagnetic Characterization of the Ivrea‐Verbano Lower Crust Body (NW Italy): Assessing the Magnetization of Variscan‐Age Lower Crust

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.
Abstract The source of high‐intensity magnetic anomalies from (mostly Precambrian) lower crust of continent interiors has long been debated, as it requires speculative rocks yielding 2–6 A/m magnetization. We report on the magnetic and paleomagnetic investigation of the Ivrea‐Verbano Zone (IVZ), Western Alps, where metamorphic and intrusive lower crust
Gaia Siravo, Fabio Speranza, Liliana Minelli, Michele Zucali, Eugenio Fazio, Chiara Caricchi, Lilla Spagnuolo   +6 more
wiley   +1 more source

What Is the Energy Budget of Subduction Zone Hazards?

Reviews of Geophysics, Volume 63, Issue 2, June 2025.
Abstract Subduction zones are host to some of the largest and most devastating geohazards on Earth. The magnitude of these hazards is often measured by the amount of energy they release over short periods of time, which itself depends on how much stored energy is available for the geologic processes that drive these hazards.
Michele L. Cooke, Juliet G. Crider, Kristin D. Morell, Leif Karlstrom, Brian J. Yanites   +4 more
wiley   +1 more source

Petrology of hydrothermal metasomatism into intra-ore dolerite dikes of mesothermal gold deposits. P. 2. Zun-Kholba (East Sayan)

Известия Томского политехнического университета: Инжиниринг георесурсов, 2019
The relevance of the research is caused by the necessity of working up the geology-genetic theory of hydrothermal gold deposits formation instead of the four hypotheses granitogene, basaltogene, metamorphogene, polygene excepting one another.
Igor Kucherenko
doaj   +2 more sources

Petrochronology of Alkaline Intrusive Magmatism in the Central High‐Atlas (Morocco) and Relationships With Jurassic Salt Diapirism

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 6, June 2025.
Abstract A striking feature of the Imilchil alkaline province, in the Moroccan Central High Atlas, is the close association of magmatic intrusions with Triassic sediments exhumed by diapirism. This study reports field, petrographic, geochemical and Sr‐Nd isotopic data, as well as new U‐Pb zircon ages, which allow us to constrain the timing of the ...
Youssef Ahechach, Muhammad Ouabid, Françoise Roger, Fleurice Parat, Otmane Raji, Jean‐Marie Dautria, Valérie Bosse, Cheikh Elwali Malainine, Hicham El Messbahi, Hamza Skikra, Jean‐Louis Bodinier   +10 more
wiley   +1 more source

Co-Pd-Ag AND Th-REE MINERALIZATION OF HOST ROCKS FROM THE EXOCONTACT ZONE OF TASHLY-TAU MASSIF, KHUDOLAZ COMPLEX (SOUTH URALS): ORE SOURCES AND FLUID INCLUSIONS DATA

Известия Томского политехнического университета: Инжиниринг георесурсов, 2020
The relevance of the research is caused by the absence of research of geochemical peculiarities and ore mineralization of exocontact rocks of ore-bearing massifs belonging to Khudolaz layered complex.
Ildar R. Rakhimov, Natalia N. Ankusheva, Vladimir V. Kholodnov   +2 more
doaj   +1 more source

Potassium metasomatism of volcanic and sedimentary rocks in rift basins, calderas and detachment terranes [PDF]

The chemical, mineralogical, and oxygen-isotopic changes accompanying K-metasomatism are described. The similarities with diagenetic reactions in both deep marine and alkaline, saline-lake environments are noted.
Chapin, C. E., drographic basins.
core   +1 more source

Mineral-petrochemical wallrock alteration of rocks in Bericul gold-ore deposit (Kuznetsk Alatau) [PDF]

, 2004
The distribution of mineral associations in near-veined zonal propylite-beresite metasomatic columns of mesothermal Bericul gold-ore deposit was analyzed.
I Kucherenko, Zhang Yuxuan, R Abramova, Alabin LV, Borodaevski N I, Korzhinskii D S, Korobeinikov A F, Kucherenko I V, Kucherenko I V, Rafailovich M S, Rusinov V L, Kucherenko I V   +11 more
core   +1 more source

The Cu–Au–Mo deposit mineralization dynamics at the northern margin of the North China Craton and the southeastern margin of the Central Asian Orogenic Belt based on crustal oxide content

Geophysical Prospecting, Volume 73, Issue 5, Page 1651-1666, June 2025.
Abstract The study of the mineralization dynamics of the Cu–Au–Mo deposit at the northern margin of the North China Craton and the southeastern margin of the Central Asian Orogenic Belt is important for understanding metallogenic settings. We calculated the crustal oxide content in heterogeneous systems using crustal temperature, seismic wave velocity (
Baochun Li, Gaofeng Ye, Xiangguo Guo, Baoqiang Tai, Sheng Jin, Kuo Zhang, Shaohuai Sun, Cheng Gao, Jien Dong   +8 more
wiley   +1 more source

Phase Equilibria Analysis for Metacarbonate With Applications to Zoned Calc‐Silicate Aureoles

Journal of Metamorphic Geology, Volume 43, Issue 5, Page 445-465, June 2025.
ABSTRACT Carbonate rocks react with infiltrating hydrothermal fluids to produce zoned calcsilicate assemblages in contact aureoles. Petrogenetic grids provide valuable insights into phase relations, metamorphic temperature (T) and the fluid composition (X) of the metacarbonate systems, as well as semi‐quantification of the prograde decarbonation at ...
Zhenhao Zhou, Xu Chu
wiley   +1 more source

A hydrothermal karst-hosted U-P deposit related to Pangea break-up: Itataia deposit, Borborema Province, Northeastern Brazil - a review

Journal of the Geological Survey of Brazil, 2018
The Itataia U-P deposit holds the second largest uranium reserve in Brazil. All of the uranium is contained within the microcrystalline structure of fluorapatite, which is the ore mineral of the collophanite bodies.
José Adilson D. Cavalcanti, Maria Dulcinea M.R. Bessa, Roberto Ventura Santos, Cesar U.V. Veríssimo, Clovis Vaz Parente   +4 more
doaj   +1 more source