Results 61 to 70 of about 3,793 (208)

First discovery of highly fractionated tourmaline-bearing leucogranite-pegmatite in Duxiushan, Anqing ore-cluster region, middle and lower Yangtze metallogenic belt: A clue to strategic metal exploration

Solid Earth Sciences, 2022
A suite of highly fractionated granites and associated pegmatite, were revealed through drill hole in the Anqing ore-cluster region in the Lower Yangtze River Belt (MLRB), Eastern China, for the first time. The pegmatite has abundant tourmaline.
Zhuang Zhao, Xiaoyong Yang, Beicai Zhang, Dongqing Wang, Jiancheng Xie, Tuyan Zhang, Wanying Li   +6 more
doaj   +1 more source

Sur le comportement des leucogranites (ex. « granulites ») en milieu littoral (Leucogranites in coastal conditions)

Bulletin de l'Association de géographes français, 1978
Résumé. - Alors qu'en régions continentales le granite à biotite et/ou muscovite est une roche résistante, il fait figure de roche moins résistante en conditions littorales (Bretagne, Irlande).
openaire   +2 more sources

Potential of Soils Natural Sorbents for Environmental Decontamination From 137Cs

Land Degradation &Development, Volume 37, Issue 2, Page 779-789, 30 January 2026.
ABSTRACT This study addresses the existing research gap concerning the lack of integrated data on the role of in situ soil components in the long‐term fixation of 137Cs under natural, protected, and non‐agricultural conditions. The contamination of ecosystems by radioactive isotopes, particularly 137Cs, represents a considerable environmental hazard ...
Katarzyna Szarłowicz, Filip Jędrzejek, Marcin Stobiński, Michał Skiba   +3 more
wiley   +1 more source

Petrography and Geochemistry of tourmaline nodules from Aderba leucogranite (northeast of Golpaygan) [PDF]

پترولوژی, 2016
The Aderba leucogranite in the Golpayegan metamorphic core complex (GMC), a part of Sanandaj-Sirjan zone, host lentiform small (2*4 cm)(Type 1) and large (7*14 cm)(Type 2)tourmaline nodules. In terms of mineralogical features, the core of these two types
Akramosadat Mirlohi, Mahmoud Khalili
doaj  

Structural, AMS and geochronological study of a laccolith emplaced during Late Variscan orogenic extension: the Rocles pluton (SE French Massif Central)

, 2006
International audienceIn the southern French Massif Central, the Rocles leucogranite of Variscan age consists of three petrographic facies; textural analysis shows that they experienced the same subsolidus deformation.
Be Mezeme, Eugène, Chen, Yan, Cocherie, Alain, Faure, Michel, Talbot, Jean-Yves   +4 more
core   +4 more sources

Orogeny, migmatites and leucogranites: A review

Journal of Earth System Science, 2001
The type ofP-T-t path and availability of fluid (H2O-rich metamorphic volatile phase or melt) are important variables in metamorphism. Collisional orogens are characterized by clockwiseP-T evolution, which means that in the core, where temperatures exceed the wet solidus for common crustal rocks, melt may be present throughout a significant portion of ...
openaire   +2 more sources

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

Syn-orogenic high-temperature crustal melting: Geochronological and Nd-Sr-Pb isotope constraints from basement-derived granites (Central Damara Orogen, Namibia) [PDF]

, 2014
Major and trace element and Nd, Sr and Pb isotope data from c. 550 Ma-old gray granites and c. 510 Ma-old red leucogranites of the high-grade central part of the Damara orogen (Namibia) indicate a dominantly deep crustal origin.
Barnes, Boynton, Brandt, Chappell, Chappell, Clemens, Clemens, England, Folkmar Hauff, Govindaraju, Gray, Haack, Haack, Haack, Hanson, Harrison, Hartmann, Hoffman, Jacob, Jacobsen, Janoušek, Jasper Berndt-Gerdes, Johannes, Johnson, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jung, Jörg Ostendorf, Kasch, Kröner, Kröner, Linnen, Longridge, Martin, McDermott, McDermott, Michard, Milisenda, Miller, Miller, Patiño Douce, Patiño Douce, Patiño Douce, Roberts, Schmidt, Schreiber, Seth, Stacey, Stefan Jung, Watson, Zen   +61 more
core   +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

Paleoproterozoic crustal evolution and Mesoproterozoic overprint in the Roosevelt-Guariba Transpressive Belt, Juruena Terrain, Southeastern Amazonas, Brazil

Journal of the Geological Survey of Brazil, 2022
The Juruena Terrain (Rondônia-Juruena Province) in the southeastern Amazonas State shows a NW-SE dextral shear zones system denominated Roosevelt-Guariba Transpressive Belt (RGTB). The RGTB was generated in response to intracontinental crustal reworking,
Marcelo Esteves Almeida, Antônio Charles da Slva Oliveira, João Orestes Schneider dos Santos, Gilles Ruffet, Joseneusa Brilhante Rodrigues   +4 more
doaj   +1 more source