Results 51 to 60 of about 5,310 (122)

A heat production model for stable continental lithosphere by the inversion of the surface heat flows [PDF]

arXiv, 2017
Obtaining the heat production (HP) in the lithosphere has always been a challenge for the geotherms and evolution of continents. By transforming the nonlinear stable heat conduction equation into a linear Poisson's potential one, we propose a method to infer the HP in the stable continental lithosphere.
arxiv  

CARBONIFEROUS 40Ar/39Ar AGE OF THE RARE METAL-ENRICHED RHYOLITES AND IGNIMBRITES IN THE SAKMARA ALLOCHTHON OF THE SOUTHERN URALS, THEIR GEOCHEMICAL FEATURES AND GEODYNAMIC SETTING

Известия высших учебных заведений: Геология и разведка, 2018
In the structure of the Sakmara allochthon of the Southern Uralssequence with rhyolites and ignimbrites locally occures. They have Nb-Zr-REE geochemical specialization.
A. V. Ryazantsev, A. V. Pilitsina, I. A. Novikov, K. E. Degtyarev   +3 more
doaj   +1 more source

Cu‐Isotope Evidence for Subduction Modification of Lithospheric Mantle

Geochemistry, Geophysics, Geosystems, 2022
Ultramafic xenoliths from southeastern Arizona, USA, provide evidence for Cu‐isotope heterogeneity in the lithospheric mantle. We report new data on Type I (Cr‐, Mg‐rich) peridotites, but also the first Cu‐isotope data for Fe‐Ti‐Al‐rich Type II ...
Pamela D. Kempton, Ryan Mathur, Russell S. Harmon, Aaron Bell, Jochen Hoefs, Barry Shaulis   +5 more
doaj   +1 more source

A New UHP‐HP Tectono‐Metamorphic Architecture for the Southern Dora‐Maira Massif Nappe Stack (Western Alps) Based on Petrological and Microstructural Evidence

Journal of Metamorphic Geology, Volume 43, Issue 4, Page 359-383, May 2025.
ABSTRACT The southern Dora‐Maira Massif, where coesite was first discovered 40 years ago, is among the most studied and better known example of high/ultra‐high‐pressure (HP/UHP) terranes. Previous to this study, the Polymetamorphic Basement Complex of the southern Dora‐Maira Massif has been defined as a nappe stack consisting of three juxtaposed ...
Chiara Groppo, Simona Ferrando, Fabrizio Tursi, Franco Rolfo   +3 more
wiley   +1 more source

Variations in Hawaiian Plume Flux Controlled by Ancient Mantle Depletion

AGU Advances, Volume 6, Issue 2, April 2025.
Abstract Mantle plumes—upwellings of buoyant rock in Earth's mantle—feed hotspot volcanoes such as Hawai‘i. The size of volcanoes along the Hawai‘i–Emperor chain, and thus the magma flux of the Hawaiian plume, has varied over the past 85 million years. Fifteen and two million years ago, rapid bursts in magmatic production led to the emergence of large ...
Paul Béguelin, Andreas Stracke, Maxim D. Ballmer, Shichun Huang, Michael Willig, Michael Bizimis   +5 more
wiley   +1 more source

Linking Cenozoic Magmatism in the North‐Central Tibetan Plateau With Plateau Growth

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract Accurate reconstruction of paleo‐crustal and lithospheric thicknesses is crucial for understanding the deep geodynamic processes driving the uplift and growth of the Tibetan Plateau (TP) and their association with Cenozoic magmatism. We reconstruct the Cenozoic crustal thickness evolution of the north‐central TP using a machine learning model ...
Peng Guo, Ting Yang, Wei‐Qiang Ji
wiley   +1 more source

A groundwater flow model for the Wolin Island area, including glaciotectonic deformation

Geologos, 2018
During the construction of mathematical models for mapping hydrogeological conditions it is necessary to apply simplifications, both in the geological structure and in hydrogeological parameters used.
Hoc Ryszard, Sadurski Andrzej, Wiśniowski Zenon   +2 more
doaj   +1 more source

Petrological Evidence for Magma Mobilization Years Before the 2020/2021 Eruption of La Soufrière Volcano, St. Vincent

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 4, April 2025.
Abstract Anticipating the onset of the 2020/2021 effusive‐explosive eruptive sequence at La Soufrière volcano, St. Vincent was challenging despite the established monitoring networks in operation. Here, we integrate petrological data to decipher retrospectively signs of imminent eruption from available pre‐eruptive monitoring data.
Michal Camejo‐Harry, Jon Blundy, Euan J. F. Mutch, Thomas Hudson, John‐Michael Kendall, Thomas Christopher, Rodrigo Contreras‐Arratia, Joan L. Latchman, Leanka Henry   +8 more
wiley   +1 more source

Evidence for Lithospheric Mantle Uniformity Beneath Cratons

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 4, April 2025.
Abstract Cratons are characterized by thick mantle roots that have experienced high degrees of partial melting, resulting in a cold, strong, and buoyant mantle compared to its oceanic counterpart. The extent of chemical variability within cratonic roots, the role of cratons in insulating the mantle over time and subsequent triggering of continental ...
Federico D. Munch, Paolo A. Sossi, Amir Khan   +2 more
wiley   +1 more source

Southwestern Tian Shan: 2. Timing of Cenozoic Mountain Building, Intra‐Montane Basin Inversion, and Relation to Lithospheric Mantle Indentation

Tectonics, Volume 44, Issue 4, April 2025.
Abstract Cenozoic reactivation of the Paleozoic thick‐skinned fold‐thrust belt of the southwestern Tian Shan has—as the Afghan‐Tajik Basin inversion—been interpreted to be driven by Indian mantle‐lithosphere indentation beneath the Pamir. Herein, we date the reactivation and explore its temporal and spatial variations. Three structural domains emerged.
Florian Trilsch, Sanaa Reuter, Lothar Ratschbacher, Raymond Jonckheere, Birk Härtel, Shadi Jafari Ansari, Christoph Glotzbach, Konstanze Stübner, Bastian Wauschkuhn, Mustafo Gadoev   +9 more
wiley   +1 more source