Results 41 to 50 of about 141 (134)

Sediment composition and U–Pb ages of detrital zircons in the Salina Cruz and Puerto Ángel beaches along the Gulf of Tehuantepec, Mexican Pacific

Geological Journal, Volume 59, Issue 10, Page 2897-2917, October 2024.
Sediment provenance in the Pacific Coast of Mexico The Salina Cruz and Puerto Ángel beach areas in the Gulf of Tehuantepec, Mexican Pacific coast represent an important economic sector of the region. In this study, the mineralogy and geochemistry of bulk sediments, and geochronology of 400 detrital zircons recovered from the beach sediments were ...
Mayla A. Ramos‐Vázquez, John S. Armstrong‐Altrin, Sanjeet K. Verma, J. Madhavaraju, Rathinam Arthur James   +4 more
wiley   +1 more source

Identifying Recycled Materials Using Mo Isotopes in Intraplate Alkali Basalts From the Southeastern Margin of Tibetan Plateau

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 10, October 2024.
Abstract Mantle heterogeneity in lithology and geochemistry is often attributed to recycled subducted materials. While distinct mantle end‐members are identified by radiogenic isotopes, the specific recycled materials contributing to this heterogeneity remain debated.
Dongjing Xu, Yue Qi, Qiang Wang, Jie Li, Derek A. Wyman, Andrew C. Kerr, Xiuzheng Zhang, Peina Guo   +7 more
wiley   +1 more source

The Origin of the Lehmann Discontinuity Beneath the Ancient Craton: Insight From the High Pressure‐Temperature Elasticity Measurements of Topaz

Geophysical Research Letters, Volume 51, Issue 17, 16 September 2024.
Abstract In this study, we concentrate on the seismic signature of subducted sediments and suggest the formation of the L‐discontinuity beneath the ancient craton related to migrated sediment dehydration. We first determined the single‐crystal elasticity of topaz, the product of sediment dehydration, at high pressures and temperatures by Brillouin ...
Yingxin Yu, Luo Li, Xinyue Zhang, Zhu Mao, Ningyu Sun, Jing Li, Xinyang Li, Wancai Li   +7 more
wiley   +1 more source

Structural Evolution, Exhumation Rates, and Rheology of the European Crust During Alpine Collision: Constraints From the Rotondo Granite—Gotthard Nappe

Tectonics, Volume 43, Issue 6, June 2024.
Abstract The rheology of crystalline units controls the large‐scale deformation geometry and dynamics of collisional orogens. Defining a time‐constrained rheological evolution of such units may help unravel the details of collisional dynamics. Here, we integrate field analysis, pseudosection calculations and in situ garnet U–Pb and mica Rb–Sr ...
A. Ceccato, W. M. Behr, A. S. Zappone, L. Tavazzani, A. Giuliani   +4 more
wiley   +1 more source

Comparative Study of the Kimberlites of Bakwanga (North Group) and Bakwa-Kalonji (South Group) In East Kasai, Democratic Republic of Congo.

Analecta
The presence of kimberlites in the Democratic Republic of Congo has been known since buttgenbach reported a typical ‘yellow ground’ in Katanga as early as 1908, and prospecting work before and after 1914 had already identified twenty-four pipes in ...
Onya Ngila Arnold, Kampata Mbwelele Dona, Koy Kasongo Ruben, Cibumba Cibumba Alain, Fwani Pambu Chamira, Kisambu Thigana Déogracias, Djonive Munene   +6 more
doaj   +1 more source

Ultrapotassic volcanic centres as potential paleogeographic indicators: The Mediterranean Tortonian ‘salinity crisis’, southern Spain

Geologica Acta, 2013
Dated peperites associated with ultrapotassic volcanic centres of the Neogene Volcanic Province of southeast Spain are of particular interest within the complex tectonomagmatic context of the Western Mediterranean because they show clear volcano ...
A. CAMBESES, J.H. SCARROW
doaj  

Canyon Diablo lonsdaleite is a nanocomposite containing c/h stacking disordered diamond and diaphite. [PDF]

Philos Trans A Math Phys Eng Sci, 2023
Németh P, Garvie LAJ, Salzmann CG.
europepmc   +1 more source

Mineralogical evidence for lamproite magma mixing and storage at mantle depths: Socovos fault lamproites, SE Spain

Lithos, 2016
Detailed textural and mineral chemistry characterisation of lamproites from the Socovos fault zone, SE Spain Neogene Volcanic Province (NVP) combining X-ray element maps and LA-ICP-MS spot analyses has provided valuable information about mantle depth ultrapotassic magma mixing processes. Despite having similar whole-rock compositions, rocks emplaced in
Cambeses, Aitor, García Casco, Antonio, Scarrow, Jane Hannah, Montero, Pilar, Pérez-Valera, Luis Alfonso, Bea, Fernando   +5 more
openaire   +2 more sources

Petrogenesis of juvenile pelletal lapilli in ultramafic lamprophyres. [PDF]

Sci Rep, 2023
Prokopyev I, Doroshkevich A, Starikova A, Kovalev S, Nugumanova Y, Izokh A.   +5 more
europepmc   +1 more source

Diamond preservation in the lithospheric mantle recorded by olivine in kimberlites. [PDF]

Nat Commun, 2023
Giuliani A, Phillips D, Pearson DG, Sarkar S, Müller AA, Weiss Y, Preston R, Seller M, Spetsius Z.   +8 more
europepmc   +1 more source