Results 71 to 80 of about 19,529 (228)

Two metamorphic cycles recorded by monazite in eclogite-facies gneisses (Southern Armorican Massif, France): A Cambro-Ordovician continental crust involved in eo-Variscan subduction

open access: yesBSGF - Earth Sciences Bulletin
We present U-Th/Pb data obtained for xenotime and monazite from the polycyclic eclogite-facies para- and ortho-gneisses of the Les Essarts Unit (Vendée, southern Armorican Massif, France), which have recorded an HT-LP cycle ending with a first ...
Bosse Valérie   +4 more
doaj   +1 more source

U-Pb ISOTOPIC GEOCHRONOLOGY OF THE MONAZITE GNEISSES OF THE «ZELENOLEVADIVSKA SUITE» OF THE MIDDLE BUG REGION

open access: yesГеологія і корисні копалини Світового океану, 2022
On the right bank of the South Bug river valley, opposite the village of Zelena Levada crystalline rocks are observed in separate scattered rock outcrops, more than 1 km long along the river bed. A bundle of hypersthene-biotite and biotite plagiogneisses
Stepanyuk L.M.
doaj   +1 more source

Late Precambrian U-Pb titanite age for peak regional metamorphism and deformation (Knoydartian orogeny) in the western Moine, Scotland [PDF]

open access: yes, 2003
There has been controversy over the number and timing of orogenies in the Precambrian Moine block in the Scottish Caledonides since the earliest radiometric dating in the 1960s. This work challenges a recent hypothesis, that this sector of the Laurentian
Evans, J.A., Tanner, P.W.G.
core   +1 more source

Nanoparticles in microdroplets: Recent advances in microfluidic generators for producing functional microbeads

open access: yesDroplet, Volume 5, Issue 2, April 2026.
Functional hybrid microbeads with electrical, magnetic, and/or optical responsiveness have emerged as versatile platforms for biotechnology. This review highlights recent advances in microfluidic technologies for producing such microbeads, with a focus on incorporating functional nanoparticles in microdroplet systems.
  Bayinqiaoge   +2 more
wiley   +1 more source

Decoding Metamorphic Nanodiamonds Formation Through Their Internal Structures

open access: yesJournal of Metamorphic Geology, Volume 44, Issue 3, Page 226-245, April 2026.
ABSTRACT Metamorphic diamonds offer insights into Earth's evolution, modulating the global carbon cycle through subduction into the mantle and exhumation. However, the formation and internal structure of minute diamonds remain poorly understood. Here, we study the internal structures of diamond‐bearing inclusions from the Eastern Alps using state‐of ...
Tim Sotelšek   +8 more
wiley   +1 more source

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

open access: yesSedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti   +5 more
wiley   +1 more source

The influence of strontium content and sintering temperature on monazite stability [PDF]

open access: yesScience of Sintering
This paper shows a simple way to synthesize a series of Ce1-xSrxPO4 ceramic materials using acetate solutions of Ce and Sr instead of nitrate which were used so far.
Mirković Miljana   +4 more
doaj   +1 more source

COM-1 and Hongcheon: New monazite reference materials for the microspot analysis of oxygen isotopic composition

open access: yesJournal of Analytical Science and Technology, 2022
Background Monazite, a moderately common light rare earth element (LREE) and thorium phosphate mineral, has chemical, age, and isotopic characteristics that are useful in the investigation of the origin and evolution of crustal melts and fluid-rock ...
Jeongmin Kim   +6 more
doaj   +1 more source

High-pressure structural investigation of several zircon-type orthovanadates

open access: yes, 2009
Room temperature angle-dispersive x-ray diffraction measurements on zircon-type EuVO4, LuVO4, and ScVO4 were performed up to 27 GPa. In the three compounds we found evidence of a pressure-induced structural phase transformation from zircon to a scheelite-
A. K. Tyagi   +9 more
core   +1 more source

CO oxidation at low temperature on Au/CePO4: Mechanistic aspects [PDF]

open access: yes, 2011
This work reports the synthesis and characterization of a cerium phosphate supported gold catalyst as well as its catalytic activity for the oxidation of CO.
Centeno Gallego, Miguel Ángel   +3 more
core   +1 more source

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