Results 51 to 60 of about 518 (163)
Enhancement of lamproite magnetic signatures
ASEG Extended Abstracts, 2009 Lamproites are peralkaline, typically ultrapotassic (6 to 8% K2O) and magnesia-rich lamprophyric rocks of volcanic or hypabyssal origin and are now considered to crystallize from a distinct type of magma. Most lamproites occur in irregular, asymmetric craters that are generally rather shallow, usually less than 300 metres in depth, often in the shape ...
D.R. Cowan, G.R.J. Cooper
openaire +1 more source
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 +2 more
wiley +1 more source
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 +2 more
wiley +1 more source
, 2016 The Argyle lamproite pipe of Western Australia contains diamonds formed at depths exceeding 150 km. We undertook noble gas and carbon isotope ratio (δ13C) analyses of three diamonds (likely of eclogitic paragenesis) from the Argyle lamproite to test ...
Phillips, David +4 more
core +2 more sources
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
, 2005 The Mesoproterozoic diamondiferous Majhgawan pipe of central India is re-examined in the light of new and recently published petrological, geochemical and isotope data. This investigation reveals that its tectonic setting is similar to that of lamproites
Rao, Chalapathi N. V.
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 +5 more
wiley +1 more source
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
Xenolith mineralogy and geology of the Prairie Creek lamproite province, Arkansas [PDF]
, 2002 Three new Arkansas lamproites were delineated and evaluated during the 1980’s. The intrusions were emplaced during the Middle Cretaceous Period based on stratigraphic relationships and published isotopic ages.
Dunn, Dennis Patrick
core
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 +4 more
wiley +1 more source