Results 51 to 60 of about 199 (173)

GemmologicalCharacteristics of Gemstone Varieties Found in the Pegmatiteof Haramosh Area, Gilgit-Baltistan

International Journal of Economic and Environment Geology, 2020
Haramosh valley is located in eastern side of Gilgit city (Fig. 1). Geographically it is located between 74°44' 17.37 " E and 35° 51 '8.97 " N. The area is a sub range of Karakoram in the south-central region of the Rakaposhi–Haramosh mountains ...
Javed Akhtar Qureshi, Mudasir Ali, Zohaib Hassan, Muhammad Alam, Memoona Niloofar, Sabit Rahim
doaj   +1 more source

Surface wave imaging using deep reflection seismic data: a study on the Cuonadong dome

Earth, Planets and Space, 2022
As interference waves in deep reflection data processing, surface waves are often suppressed as noise, but surface waves carry considerable underground media information, including structural information and the physical properties of rocks.
Guangwen Wang, Zhanwu Lu, Wenhui Li, Shuai Xue, Haiyan Wang, Yongzhi Cheng, Si Chen, Wei Cai   +7 more
doaj   +1 more source

Himalayan Leucogranites: An Experimental Petrology Perspective

Elements
The High Himalayan leucogranites (HHL) are produced by muscovite breakdown of a metapelitic source, at temperatures below 800 °C, with initial melt water contents of ~5–7 wt.%. The tourmaline-rich HHL variety is colder, possibly a fractionation product of the hotter two-mica HHL.
Scaillet, Bruno, Pichavant, Michel
openaire   +3 more sources

Radiogenic Heating as the Thermal Driver of Himalayan Crustal Heating During Prolonged Thickening

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.
Abstract The thermal evolution of the crust during continental collision evolves from cold to hot with time, which impacts crustal reworking and differentiation. However, it remains elusive as to the mechanism driving the crust to be hot during the protracted collision.
Shuaiqi Liu, Guibin Zhang, Lifei Zhang, Shuzhen Wang, Feng Chang   +4 more
wiley   +1 more source

Long‐Lasting Plutonism During Orogenic Cycles: Incremental Emplacement of the Variscan Bassiès Pluton (Central Pyrenees, France)

Terra Nova, Volume 37, Issue 5, Page 316-323, October 2025.
ABSTRACT Laser ablation U–Pb single zircon geochronology was applied to four peraluminous granite and granodiorite samples from the Bassiès pluton in the Central Pyrenees (France) yielding a wide range of concordant ages from early Carboniferous (Tournaisian, 351 Ma) to early Permian (Artinskian, 285 Ma).
Stephan Schnapperelle, Michael Stipp, Jochen E. Mezger, Mandy Zieger‐Hofmann, Johannes Zieger, Ulf Linnemann   +5 more
wiley   +1 more source

Multi‐Stage Crustal Thickening, Surface Uplift, and Collision in the Western Himalaya‐Karakoram‐Tibet Orogen Revealed by Chemical Mohometry

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract The Himalaya‐Karakoram‐Tibet (HKT) orogen provides an unrivaled opportunity to study the dynamic linkages between deep and surface processes during collisional orogenesis. However, these efforts are hindered by conflicting interpretations on the number and timing of collisional events, and the timing of crustal thickening and associated ...
Ian W. Hillenbrand, Victor E. Guevara
wiley   +1 more source

Geochronological and geochemical features of magmatic gold- and silverbearing complexes in the Chukotka sector of the Russian Arctic coast

Литосфера, 2020
Research subject. This study was devoted to magmatic complexes in Northwestern Chukotka associated with the largest gold and silver deposits across Kupol’skii (Kupol field) and Ilirnei (Dvoinoe and September fields) ore junctions.
V. G. Sakhno, L. S. Tsurikova, S. O. Maksimov   +2 more
doaj   +1 more source

Raising the Roof of the World: Intra‐Crustal Asian Mantle Supports the Himalayan‐Tibetan Orogen

Tectonics, Volume 44, Issue 9, September 2025.
Abstract The Himalayan‐Tibetan orogen formed via the ongoing collision of India and Asia. Its colossal elevations stem from buoyant crustal roots that doubled in thickness during continental collision, widely believed to result from Indian crust under‐thrusting its Asian counterpart and Asian crustal thickening. However, a single crustal layer of up to
P. Sternai, S. Pilia, S. Ghelichkhan, P. Bouilhol, A. Menant, D. R. Davies, L. Ostorero, B. Vaes, R. Esposito, E. Garzanti, S. Cloetingh, T. Gerya   +11 more
wiley   +1 more source

Significance of Leucogranitic Gneiss in the Archean Teton Range

The UW National Parks Service Research Station Annual Reports, 2008
In previous years of this project, we have developed the hypothesis that the high-pressure granulites exposed in the Moose Basin area of the Teton Range represent evidence of a 2.7 billion year­old continent-continent collision. We have described gneisses in the Teton Range that show two distinct metamorphic histories. In the northwest there are high­
B. Frost, C. Frost, S. Swapp, L. Finley-Blasi, S. Stacey   +4 more
openaire   +2 more sources

Stratigraphy and geomorphology of Des‐Cubierta Cave (Pinilla del Valle, Madrid, Spain): Geological insights into a Neanderthal symbolic accumulation of large crania

Journal of Quaternary Science, Volume 40, Issue 6, Page 958-976, August 2025.
ABSTRACT Des‐Cubierta Cave, part of the Calvero de la Higuera complex, is situated in the intramountainous upper valley of the Lozoya River within the Guadarrama Range. The cave's geological, palaeontological, and archaeological record reveals a complex history of sedimentary and anthropogenic processes spanning hundreds of thousands of years ...
David Manuel Martín‐Perea, Enrique Baquedano, Juan Luis Arsuaga, César Laplana, Ana Isabel Ortega, Lucía Villaescusa, Belén Márquez, Rosa Huguet, Abel Moclán, Sandra Gómez Soler, Xabier Arroyo, Laura Rodríguez, Rebeca García‐González, M. Cruz Ortega, Jesús Masa‐Andrés, Diego J. Álvarez‐Lao, Nuria García, M. Ángeles Galindo‐Pellicena, Tom Higham, Alfredo Pérez‐González   +19 more
wiley   +1 more source