Results 31 to 40 of about 4,058 (252)

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

Gamma radioactivity and Environmental radiation risks of Granitoids in Central and Western Gilgit-Baltistan, Himalayas, North Pakistan

Results in Physics, 2022
The study analyzed the gamma radioactivity levels due to radionuclides (226Ra, 232Th, and 40K) by the Gamma-Ray spectrometry method and calculated health hazards in rocks in Central and Western Gilgit-Baltistan, North Pakistan.
Hannan Younis, Farooq Ahmad, Muhammad Anees, Atia Atiq, Nida Shakeel, Muhammad Adil, Khurram Mehboob, Abdulsalam M. Alhawsawi, Rashid Khan, Ahmed M. Khubrani, Aziz Ahmed Qureshi, Muhammad Ajaz   +11 more
doaj   +1 more source

Geochemistry of the Kali River terrace sediments in Central Himalaya, India: Implication on nature of provenance in the known tectonic environment

Environmental Challenges, 2022
In the Central Himalaya, the Kali River flow through the rocks of Tethys sedimentary (TS) sequences and Higher Himalayan crystallines (HHC) towards the upstream and through the Lesser Himalayan metasedimentary (LHS) the Siwaliks rocks in the downstream ...
Riyanka Talukdar, Girish Ch Kothyari, Manjari Pathak, Charu C Pant   +3 more
doaj   +1 more source

Thermal constraints on the emplacement rate of e large intrusive complex : the Manaslu Leucogranite, Nepal Himalaya. [PDF]

, 2006
International audienceThe emplacement of the Manaslu leucogranite body (Nepal, Himalaya) has been modelled as the accretion of successive sills. The leucogranite is characterized by isotopic heterogeneities suggesting limited magma convection, and by a ...
Scaillet, B, Sparks, RSJ, Scaillet, Bruno, Annen, Catherine, Annen, C J, Sparks, R.S.J.   +5 more
core   +1 more source

Spatiotemporal Distribution of the Himalayan Leucogranite: Implications for Mountain-building as a Function of Indian Slab Dynamics [PDF]

, 2016
The Himalayan orogen, as a natural laboratory for continental collision, has attracted intense research attention for decades. However, the question of how the orogen was built is still debated, and potential answers are few when considering how and why ...
Guo, Hongcheng
core   +2 more sources

PETROGENESIS OF S-TYPE GRANITOID MAGMATISM ON THE MARGIN OF THE TUVA-MONGOLIAN MASSIF (WESTERN SANGILEN, SOUTHEASTERN TUVA): SETTINGS, AGE, AND FORMATION STAGES

Геодинамика и тектонофизика
This study integrates the isotope-geochronological (zircon U-Pb dating), petrogeochemical and structural-petrological data, as well as the data on garnet composition and fluid inclusions in leucogranite quartz, to characterize S-type granitoid magmatism ...
I. V. Karmysheva, V. G. Vladimirov, O. V. Shemelina, D. V. Semenova, V. A. Yakovlev, E. A. Pronyakin, A. E. Smolyakova   +6 more
doaj   +1 more source

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

An Investigation on the Composition of Biotite from Mashhad Granitoids, NE Iran [PDF]

Journal of Sciences, Islamic Republic of Iran, 2010
Compositions of biotite from three different rock types of Mashhad granitoids, i.e., granodiorite, monzogranite and leucogranite in NE of Iran have been documented by electron microprobe and wet chemistry for Fe3+ and Fe2+.
A.A.T. Shabani
doaj  

Inhandjara topaz leucogranite: A late rare metal-mineralized stock within the A-type Itu batholith, SE Brazil

, 2020
The Inhandjara leucogranite is a highly differentiated Ediacaran stock with crystallization age of ca. 570 Ma (SHRIMP zircon U–Pb dating). It is a satellite intrusion of the Itu batholith, a large post-orogenic A-type granite in south-eastern Brazil. The
F.G.P. Araújo, Lucelene Martins, G. S. B. Pereira, V. Janasi   +3 more
semanticscholar   +1 more source

Ediacaran–Cambrian High‐Strain Melt‐Present Deformation of the Archean Charcot Province, East Antarctica

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The assembly of Gondwana involved several Pan‐African orogens, although their extension into ice‐covered Antarctica remains contentious. Particularly problematic is our understanding of the Kuunga orogenic system in East Antarctica, including its eroded architecture and temporal evolution. The remote Charcot Province, at the easternmost extent
Jacqueline A. Halpin, Nathan R. Daczko, Jacob A. Mulder, Alessandro Maritati, Tobias Stål   +4 more
wiley   +1 more source