Results 21 to 30 of about 16,578 (144)

GEOCHRONOLOGY OF ULTRAMAFIC LAMPROPHYRE DIKES IN THE TOMTOR COMPLEX

Geodynamics & Tectonophysics
This work studies thin ultramafic lamprophyre (UML) dikes associated with the Tomtor alkaline-ultramafic massif (Arctic Siberia). 40 Ar/ 39 Ar dating yielded an emplacement age of 710 Ma for the dikes.
S. V. Malyshev, E. A. Gladkochub, A. A. Karimov, A. V. Ivanov, A. M. Pasenko, A. A. Shalamova, D. R. Sitkina, A. V. Travin, N. V. Bryanskiy   +8 more
openaire   +1 more source

Supplementary files for: New insights from field observations of the Younger giant dyke complex and mafic lamprophyres of the Gardar Province on Tuttutooq island, South Greenland

, 2021
The Gardar Province of south Greenland is defined by the products of alkaline igneous magmatism during the Mesoproterozoic. The most laterally extensive Gardar intrusions are a series of giant dyke complexes best exposed on the Tuttutooq archipelago.
Lot Koopmans
core   +1 more source

A few thoughts on the diamondiferous nature of lamprophyres from Wajrakarur Kimberlite Field, Southern India

Mineralogia
Lamprophyre Clan Rocks (LCRs) such as lamprophyres, lamproites and kimberlites are reported from many parts of the cratonic areas in India, especially the diamondiferous Eastern Dharwar Craton (EDC).
Phani P. Ramesh Chandra, Kamvisis Ioannis   +1 more
doaj   +1 more source

Architecture of the Patrimonio Fault System and the Miocene Post‐Orogenic Extension in Alpine Corsica (France)

Tectonics, Volume 45, Issue 8, August 2026.
Abstract The exhumation of Alpine Corsica is the result of Oligocene‐Miocene lithospheric back‐arc extension in the wake of the eastward migration of Apenninic subduction. Although the geometry, kinematics and timing of ductile detachments are well constrained, the brittle extension leading to final exhumation of Alpine Corsica is less documented.
Simone Masoch, Michele Fondriest, Giulio Di Toro, Giancarlo Molli, Nereo Preto, Lorenzo Tavazzani, Francesca Prando, Giorgio Pennacchioni   +7 more
wiley   +1 more source

Geochemistry and petrology of the Búzios Island alkaline massif, SE, Brazil

Brazilian Journal of Geology
: The Late Cretaceous Búzios Island alkaline massif intrudes Precambrian charnockites and consists dominantly of syenitic rocks that are cut by a large number of dikes, mostly NE-trending, and representing two distinct suites, a felsic one and a mafic ...
Celso de Barros Gomes, Francisco Rubens Alves, Rogério Guitarrari Azzone, Gaston Eduardo Enrich Rojas, Excelso Ruberti   +4 more
doaj   +1 more source

Kamafugite Magma Pathways and Lava‐Flow Paleotopography From Three‐Dimensional Audiomagnetotelluric Imaging Constrained by Borehole Data

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract An audiomagnetotelluric (AMT) survey was conducted within the Alto Paranaíba Igneous Province, southeastern Brazil, to delineate shallow occurrences of kamafugite, a rare ultrapotassic volcanic rock worldwide. A dense grid of AMT stations was deployed, allowing the construction of a high‐resolution 3D electrical resistivity model ...
Lucca M. Franco, Emanuele F. La Terra, Liliane P. Panetto, Adevilson O. Alves, Miguel A. Tupinambá, Sergio L. Fontes, Emin U. Ulugergerli   +6 more
wiley   +1 more source

Early Cretaceous ultramafic-alkaline-carbonatite magmatism in the Shillong Plateau-Mikir Hills, northeastern India – a synthesis

, 2022
A comprehensive mineralogical, geochemical and isotopic review of six ultramafic-alkaline-carbonatite magmatic intrusions of the Shillong Plateau (Sung Valley, Jasra, Swangkre-Rongjeng, and Mawpyut) and Mikir Hills (Samchampi-Samteran and Barpung) is ...
Srivastava R. K., Guarino V., Melluso L., Vincenza Guarino, Leone Melluso, Rajesh K. Srivastava   +5 more
core   +1 more source

LifeMet: Report on the 2024–2025 meteorite recovery expedition in Dronning Maud Land, Antarctica for the study of microbe–meteorite interactions

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1847-1860, August 2026.
Abstract Since the discovery of nine meteorites near the Yamato mountains in 1969, Antarctica has been recognized as a superb location for meteorite recovery. While Antarctic recovery expeditions prioritize meteorite preservation for mineralogical and planetary studies, meteorites are not typically collected for biological applications.
Rachael Lappan, Rachel S. Kirby, Andrew G. Tomkins   +2 more
wiley   +1 more source

Late Permian–Early Triassic Kamensky dyke belt, NW margin of Siberian platform: Two stages of the Siberian superplume event

Geosystems and Geoenvironment
A large (900 km long by 50-60 km wide) Early Triassic dyke swarm intruded along the northern margin of the Siberian platform in the Yenisei-Khatanga trough, crossing the Noril’sk, Kamensky and Maimecha-Kotui provinces.
V.V. Ryabov, I.V. Ashchepkov, A.V. Travin, V.A. Ponomarchuk, N.S. Karmanov, N.M.W. Roberts   +5 more
doaj   +1 more source

Minerals of the apatite group from ultramafic lamprophyres of the Zima alkaline-ultramafic carbonate complex (Urik-Iya graben, Eastern Sayan region)

LITHOSPHERE (Russia), 2023
Research subject. This paper presents the results of a study of minerals of the apatite group from aillikites of the Zima alkaline-ultramafic carbonatite complex. Aim. To determine the composition of apatites to characterize the studied rocks and to elucidate the patterns of element distribution in the magma of aillikites in the late crystallization ...
Ya. N. Nugumanova, A. D. Kalugina, A. E. Starikova, A. G. Doroshkevich, I. R. Prokopyev   +4 more
openaire   +1 more source