Results 81 to 90 of about 4,058 (252)

Evidence for Nb-Ta Occurrences in the Syn-Tectonic Pan-African Mayo Salah Leucogranite (Northern Cameroon): Constraints from Nb-Ta Oxide Mineralogy, Geochemistry and U-Pb LA-ICP-MS Geochronology on Columbite and Monazite

, 2018
The Mayo Salah pluton, which is located in the North-Cameroon domain of Central African Bold Belt (CAFB), is emplaced as a laccolith in volcano-sedimentary schists of Poli series, and displays features of Rare-metal Granite (RMG).
Periclex Martial Fosso Tchunte, R. Tchameni, A. André-Mayer, Hilaire Somtebda Dakoure, F. Turlin, M. Poujol, E. Nomo, Alliance Nicaise Saha Fouotsa, O. Rouer   +8 more
semanticscholar   +1 more source

Two Cycles of Devonian–Triassic Extension and Compression in the Altai Accretionary Wedge: Insights From Tsogt Core Complex

Tectonics, Volume 44, Issue 12, December 2025.
Abstract The Altai Accretionary Wedge in the Mongolian Altai records a polyphase geodynamic evolution involving two extensional–compressional tectonic cycles, constrained by petrostructural analysis and zircon, monazite U–Pb, and Ar–Ar geochronology. The studied section includes a southwestern high‐grade and a northeastern low‐grade domain, previously ...
O. Lexa, P. Jeřábek, K. Schulmann, M. Racek, Y. Jiang, A. R. C. Kylander‐Clark, J. Míková, R. Spikings   +7 more
wiley   +1 more source

Chemistry of Hydrothermally Destabilized Rare-Metal and Radioactive Minerals in Deformed A-Type Granite in the Vicinity of Nugrus Shear Zone, South Eastern Desert, Egypt

Resources
In the Wadi Nugrus area, south Eastern Desert of Egypt, A-type granite is highly deformed in a prominent NW-SE trending shear zone, likely related to the Najd shear system.
Adel A. Surour, Amira M. El-Tohamy, Gehad M. Saleh   +2 more
doaj   +1 more source

Petrogenetic and mineralogical constraints in metamorphic-plutonic complex of N-Bijar, Kordestan, Iran [PDF]

پترولوژی
IntroductionThe Sanandaj-Sirjan metamorphic-magmatic zone (SSZ) (with 1500 km in length and 150-200 km in width) along with the Urumieh-Dokhtar magmatic arc as well as the folded-thrust belt of Zagros comprise the Zagros orogeny in south west of Iran ...
Maryam Bafandeh, Abbas Asiabanha, Mohsen Nadrabady   +2 more
doaj   +1 more source

A Dual‐Geochronologic and Thermochronologic Detrital Approach to Identify the Focus of Erosion in the Kosi Basin, Nepal

Tectonics, Volume 44, Issue 12, December 2025.
Abstract The Kosi River watershed captures the major lithotectonic units, structures, and characteristic climatic conditions found along the Himalaya. Therefore, this setting provides a useful location to investigate the respective influences of tectonics and climate in eroding bedrock and driving landscape evolution.
J. N. Zehner, D. A. Orme, K. Sundell, Y. Najman, M. Blum, J. Gleason, A. K. Laskowski, S. Poudel   +7 more
wiley   +1 more source

The South Tibetan Detachment and the Manaslu Leucogranite: A structural reinterpretation and restoration of the Annapurna-Manaslu Himalaya, Nepal [PDF]

, 2003
The South Tibetan Detachment (STD) System comprises both ductile shear zones and brittle low-angle extensional faults bounding the upper (northern) margin of the high-grade metamorphic and anatectic rocks of the Greater Himalayan Sequence (GHS).
Godin, L, Searle, Michael, Searle, MP
core   +1 more source

On the geodynamics of the Alpine collisional granitoids from Central Anatolia: petrology, age and isotopic characteristics of the granitoids of the Ekecikdağ Igneous Association (Aksaray/Turkey)

Geodinamica Acta, 2019
Granitoids of the Ekecikdağ Igneous Association (Central Anatolia/Turkey) are products of collisional–post-collisional magmatism in the Ekecikdağ area. These granitoids are granodiorite, microgranite and leucogranite.
Fatma Toksoy-Köksal
doaj   +1 more source

DURATION OF GRANITOID MAGMATISM IN PERIPHERAL PARTS OF LARGE IGNEOUS PROVINCES (BASED ON 40AR/39AR ISOTOPIC STUDIES OF ALTAI PERMIAN-TRIASSIC GRANITOIDS)

Геодинамика и тектонофизика, 2017
In large igneous provinces (LIP) of fold areas, granitoid rocks are dominant, while mantle-derivated rocks play a subordinate role in rock formation. If magma emissions are impulsive, it may take 25–30 million years for a LIP to form and take shape.
O. A. Gavryushkina, A. V. Travin, N. N. Kruk   +2 more
doaj   +1 more source

Confronting Episodic vs. Continuous Heat Sources in Long‐Lived Hot Orogens: Insights From Petrochronological Studies in the Nova Venecia Complex, Araçuaí Orogen (SE Brazil)

Journal of Metamorphic Geology, Volume 43, Issue 9, Page 863-890, December 2025.
ABSTRACT Orogenic belts that sustain elevated temperatures at intermediate crustal depths for tens of millions of years are known as hot orogens. The evolution of these hot orogens is largely influenced by thermal maturation, primarily driven by the distribution of heat‐producing elements (HPEs), such as K, Th and U in the overthickened crust.
Lucas R. Schiavetti, Vinicius T. Meira, Sean Mulcahy, Jeffrey D. Vervoort, Peter L. Baker, George L. Luvizotto, Ricardo I. F. Trindade   +6 more
wiley   +1 more source

The Malari Leucogranite, Garhwal Himalaya, Northern India: Chemistry, Age, and Tectonic Implications [PDF]

, 2010
In the Garhwal region, India, the Malari leucogranite cuts the South Tibetan detachment system, a large-scale normal fault system at the top of the High Himalaya.
S. L. Corrie, Corrie, Stacey L., Sachan, Himanshu K., M. J. Kohn, H. K. Sachan, Kohn, Matthew J., Saxena, Anubhooti, A. Saxena   +7 more
core   +1 more source