Results 61 to 70 of about 518 (163)

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

Lamproite dikes along the Socovos Fault (Eastern Betics)

, 2010
The Calasparra segment of the Socovos Fault shows a large number of lamproite outcrops, most of them being dikes emplaced along tension gashes and Riedel faults. Subsequently to the emplacement, some of the dikes were affected by faulting, showing striae
Azor, A., Sánchez Gómez, Mario, Fernández Soler, José Manuel, Pérez Valera, Luis Alfonso, Pérez Valera, Fernando   +4 more
core  

SHRIMP U-Pb isotope data for rutile from lamproite sample DM2/2of Darlimunda lamproites, Bulk-rock geochemical data, Sr-Nd-Hf-Os isotope data of Nuapada lamproite field, Bastar Craton

SHRIMP U-Pb isotope data for rutile from lamproite sample DM2/2of Darlimunda lamproites, Bulk-rock geochemical data, Sr-Nd-Hf-Os isotope data of Nuapada lamproite field, Bastar CratonTHIS DATASET IS ARCHIVED AT DANS/EASY, BUT NOT ACCESSIBLE HERE. TO VIEW
Pandey, R (via Mendeley Data)
core   +1 more source

Contrasting noble gas compositions of peridotitic and eclogitic monocrystalline diamonds from the Argyle lamproite, Western Australia

, 2019
He-Ne-Ar compositions were determined in diamonds from the Argyle lamproite, Western Australia, to assess whether subducted material affects the noble gas budget and composition of stable old sub-continental lithospheric mantle (SCLM).
Jaques, A.L., Timmerman, S., Honda, M., Bulanova, G., Jaques, A. L., Smith, C.B., Burnham, A.D., Zhang, X., Smith, C. B., Burnham, A. D.   +9 more
core   +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

A lamproite stock with ellipsoidal phlogopite nodules at Oqaitsúnguit, Disko Bugt, central West Greenland

, 1992
Geology, Phlogopite nodules, lamproite, K ...
Skjernaa, L.
core  

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

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

, 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   +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