Results 61 to 70 of about 1,332 (160)

Gravity field and geothermal structure of the Corsica‐Sardinia Block

Terra Nova, Volume 36, Issue 6, Page 506-515, December 2024.
Abstract This paper presents a finite‐differences 3D numerical model that simulates the gravity and thermal structure of the Corsica‐Sardinia Block (CSB), an apparently stable lithospheric domain characterized by cryptic tectonic activity. In the experiments, we change the density and heat production rate of the model crust within a range of ...
F. Cocco, L. Casini, A. Funedda
wiley   +1 more source

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

Age and origin of proterozoic kimberlites and lamproites from the Dharwar Craton, southern India [PDF]

, 2012
This is a study of kimberlite and lamproite intrusions located in southern India within the Eastern Dharwar craton (EDC). Bulk-rock major-element, trace-element, REE- and Nd- isotopic data support previous studies that have classified the ultramafic ...
Osborne, Ian
core   +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

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

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

Ancient Craton‐Wide Mid‐Lithosphere Discontinuity Controlled by Pargasite Channels

Geophysical Research Letters, Volume 51, Issue 9, 16 May 2024.
Abstract The mechanisms governing a commonly observed seismic velocity drop in the cratonic lithosphere, referred to as the mid‐lithospheric discontinuity (MLD), have been widely debated. To identify the composition and seismic structure of MLDs, we have analyzed Sp receiver functions (SRF) and mantle xenocrysts for six regions across Australia.
Z. J. Sudholz, P. Zhang, C. M. Eakin, G. M. Yaxley, A. L. Jaques, C. Frigo, K. Czarnota   +6 more
wiley   +1 more source

Occurrence and compositions of post-metamorphic alkali ～ highly potassic dykes intruded into metamorphic rocks on Lützow-Holm Complex, East Antarctica [PDF]

, 2016
第2回極域科学シンポジウム/第31回極域地学シンポジウム 11月17日（木） 国立極地研究所 ...
D.J.Du nkley, J. Dunkley Daniel, Kato Mutsumi, Miyamoto Tomoharu, Tsunogae Toshiaki, 加藤 睦実, 宮本 知治, 角替 敏昭   +7 more
core   +1 more source

Delamination Magmatism in Eastern Anatolia: A Geochemical Perspective

Geochemistry, Geophysics, Geosystems, Volume 25, Issue 5, May 2024.
Abstract The Sr‐Nd‐Hf‐Pb isotope geochemistry of the Late Miocene Tunceli Volcanics suggests that they are the products of mixed asthenospheric and lithospheric mantle melts. The combined elemental and mineral chemistry data additionally indicate that a pyroxenite component of lithospheric origin is involved in their genesis. Calculations favor melting
Alican Aktağ, Kaan Sayit, Tanya Furman, Bradley J. Peters   +3 more
wiley   +1 more source