Results 51 to 60 of about 1,332 (160)

Metasomatism and Melting of Cordilleran Lithosphere Resulting From Sediment Relamination During Shallow Subduction

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Mantle xenoliths recovered from the modern backarc region of the northern Altiplano Plateau record metasomatism by slab‐derived silicic melts, and a suite of Quaternary volcanics suggest that melting of accreted crustal material has persisted since shallow subduction in the Oligocene.
C. D. Hiett, D. L. Newell, J. W. Shervais   +2 more
wiley   +1 more source

Igneous Rock Associations 26. Lamproites, Exotic Potassic Alkaline Rocks: A Review of their Nomenclature, Characterization and Origins [PDF]

, 2020
Lamproite is a rare ultrapotassic alkaline rock of petrological importance as it is considered to be derived from metasomatized lithospheric mantle, and of economic significance, being the host of major diamond deposits.
Mitchell, Roger H.
core   +2 more sources

Stratigraphic Revision of the Selendi, Güre, and Uşak Neogene Basins, Western Anatolia

Acta Geologica Sinica - English Edition, Volume 99, Issue 2, Page 332-351, April 2025.
Abstract In a re‐examination of the Neogene stratigraphy of the Uşak, Güre, and Selendi basins of western Anatolia, western Turkey, the stratigraphic position of the previously defined İnay Group is revised, which was previously considered to be of the Middle Miocene age.
Fikret GÖKTAŞ, Serdar MAYDA, Mehmet Cihat ALÇİÇEK   +2 more
wiley   +1 more source

Olivine-lamproite from Ybytyruzú Lamproite Field, Eastern Paraguay [PDF]

, 2017
En el presente trabajo se realiza la descripción de la geología, la química mineral, comentarios sobre su geoquímica y caracterización de la intrusión Yzu-4 emplazada en el Campo de rocas lamproíticas del Ybytyruzú, Paraguay Oriental.
Acevedo, Rogelio Daniel, Alonso, Ricardo, Baez Presser, Jaime Leonardo, Benitez, Pedro, Bitschene, Peter Rene, Tondo, Matías J., Vladykin, Nikolay V.   +6 more
core  

The molecular structure of melts along the carbonatite–kimberlite–basalt compositional joint: CO2and polymerisation [PDF]

, 2016
International audienceTransitional melts, intermediate in composition between silicate and carbonate melts, form by low degree partial melting of mantle peridotite and might be the most abundant type of melt in the asthenosphere.
Corradini, Dario, Florian, Pierre, Gaillard, Fabrice, Guillot, Bertrand, Iacono-Marziano, Giada, Morizet, Yann, Moussallam, Yves, Sator, Nicolas, Schmidt, Burkhard C., Vuilleumier, Rodolphe   +9 more
core   +4 more sources

Mantle Dynamics of the Long‐Lived Middle Yangtze Basaltic Field: Insight From a Combined Geochemical and Numerical Modeling Approach

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 2, February 2025.
Abstract Melting for the generation of intracontinental diffuse basaltic fields is generally ascribed to the effects from lithospheric dynamic processes, but how the asthenospheric dynamics influence the overlying lithosphere remains poorly known. Here, this is explored via a combined geochemical and numerical modeling study on the long‐lived Middle ...
Hong‐Kun Dai, Qing Xiong, Jian‐Ping Zheng   +2 more
wiley   +1 more source

Xenolith Constraints on the Mantle Potential Temperature and Thickness of Cratonic Roots Through Time

Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.
Abstract The temperature of the convecting mantle and thickness of the lithosphere control many of Earth's processes. However, there is disagreement regarding the evolution of these quantities through time. We use a global data set of mantle xenoliths and xenocrysts to construct paleogeotherms at different eruption ages (16–1,311 Ma) and estimate the ...
Z. J. Sudholz, A. Copley
wiley   +1 more source

Abundance and Partitioning of OH in a High-pressure Magmatic System: Megacrysts from the Monastery Kimberlite, South Africa [PDF]

, 2004
Concentrations of OH, and major and trace elements were determined in a suite of mantle-derived megacrysts that represent the crystallization products of a kimberlite-like magma at ~5 GPa and ~1400–1100°C.
Bell, David R., Moore, Rory O., Rossman, George R.   +2 more
core   +1 more source

Rare‐Earth Mineralization in Dong Pao Deposit, Laichau Province, Vietnam

Resource Geology, Volume 75, Issue 1, January/December 2025.
ABSTRACT The Dong Pao deposit in northern Vietnam is associated with the Paleogene Dong Pao Syenite Complex, which intruded into the limestone of the Triassic age. Although the Dong Pao deposit has been attracting exploration for decades as a promising rare earth deposit, it has not been well studied in terms of mineralization style and formation ...
Tinh Thanh Bui, Yasushi Watanabe, Carmela Alen J. Tupaz, Takuya Echigo, Shogo Aoki, Mihoko Hoshino   +5 more
wiley   +1 more source

The Nitrogen Budget of Earth

, 2015
We comprehensively compile and review N content in geologic materials to calculate a new N budget for Earth. Using analyses of rocks and minerals in conjunction with N-Ar geochemistry demonstrates that the Bulk Silicate Earth (BSE) contains \sim7\pm4 ...
Goldblatt, Colin, Johnson, Ben
core   +1 more source