Results 31 to 40 of about 9,771 (218)

MINERALOGY AND GEOCHEMISTRY OF CHLORITHOLITES FROM THE NEPRYAKHINO GOLD FIELD, SOUTH URALS [PDF]

Минералогия, 2020
The chlorite rocks (chloritolites) exposed in a bedrock of the Mokhovoe boloto (Moss swamp) gold placer (East Uralian Megazone, South Urals), which occurs on ultramafic rocks, are studied.
V.V. Murzin, D.A. Varlamov
doaj   +1 more source

The behaviour of monazite from greenschist facies phyllites to anatectic gneisses: an example from the Chugach Metamorphic Complex, southern Alaska [PDF]

, 2012
Monazite is a common accessory mineral in various metamorphic and magmatic rocks, and is widely used for U–Pb geochronology. However, linking monazite U–Pb ages with the PT evolution of the rock is not always straightforward.
Gasser, D., Gasser, Deta, Rubatto, D., Bruand, Emilie, Rubatto, Daniela, Stuwe, K., Stüwe, Kurt   +6 more
core   +2 more sources

Formation of monazite-(Ce, La) by fluid-apatite interaction: the Floresta Azul Alkaline Complex, Bahia, Brazil

Brazilian Journal of Geology
: Monazite is a common accessory mineral in the Floresta Azul Alkaline Complex, occurring in three different rock types, which form this batholith: nepheline syenite, granite and fenite. Two compositional types of monazite can be found: monazite-(Ce) and
Jailson Júnior Alves Santos, Herbet Conceição, Marcel Vinícius Santos Leandro, Maria de Lourdes da Silva Rosa   +3 more
doaj   +1 more source

Ion microprobe dating of fissure monazite in the Western Alps: insights from the Argentera Massif and the Piemontais and Briançonnais Zones

Swiss Journal of Geosciences, 2020
Ion probe 208Pb/232Th fissure monazite ages from the Argentera External Massif and from the high-pressure units of the Western Alps provide new insights on its Cenozoic tectonic evolution.
Emmanuelle Ricchi, Edwin Gnos, Daniela Rubatto, Martin John Whitehouse, Thomas Pettke   +4 more
doaj   +1 more source

Mineralogy, Geochemistry, and Fluid Inclusion Microthermometry of Apatite and Rare Earth Element Minerals in the Esfordi Deposit, NE of Bafq, Yazd Province

Journal of Economic Geology, 2021
Introduction REE should be evaluated in rocks and minerals due to their behavior in complex geochemical processes leading to their use as tracers in geochemical environments.
Kiamars Hosseini , Mohammad Ali Rajabzadeh   +1 more
doaj   +1 more source

Unravelling the Flotation Performance of 1-Hydroxy-2-naphthyl hydroxamic Acid and Styrene Phosphonic Acid Collectors on Monazite Using Experiments and DFT Calculations

Molecules
The atomic-level structure and electronic properties of monazite were investigated using a first-principles method based on density functional theory (DFT).
Weiwei Wang, Zhengyao Li, Weiyao Zhu, Shaochun Hou, Chunlei Guo   +4 more
doaj   +1 more source

Assessment of Five Monazite Reference Materials for U-Th/Pb Dating Using Laser-Ablation ICP-MS

Geosciences, 2019
Monazite is a common accessory phosphate mineral that occurs under a wide range of pressure and temperature conditions in sedimentary, metamorphic and igneous rocks.
Marianne Richter, Yona Nebel-Jacobsen, Oliver Nebel, Thomas Zack, Regina Mertz-Kraus, Massimo Raveggi, Delia Rösel   +6 more
doaj   +1 more source

Monazite analysis; from sample preparation to microprobe age dating and REE quantification. [PDF]

, 2000
Despite the recognized importance of monazite in geochronology and petrology, a range of fundamental analytical and preparational problems remains. For example, chemical Th-U-Pb dating of monazite requires special lead-free sample preparation.
Liechti, Adrian, Scherrer, Nadim, Gnos, Edwin, Jakob, Vreni, Scherrer, N.C., Gnos, E., Jakob, V., Engi, Martin, Engi, M., Liechti, A.   +9 more
core   +1 more source

A Reassessment of Petrochemistry of ~1.2 Ga Tonalitic Rocks of the Northern Tugela Terrane, Natal Metamorphic Belt, South Africa: Further Constraints on the Evolution of This Belt

Geological Journal, EarlyView.
Our petrochemical studies on ~1.2 Ga granitoids of the Natal Metamorphic Belt, South Africa, do not suggest any property similar to Phanerozoic‐style subduction‐related granitoids. Plot of Kotongweni Tonalite in Y versus Sr diagram (after Moyen 2011), note that most samples have Sr/Y < 50.
Palesa Leuta, Saumitra Misra, Thembiso O. Basupi   +2 more
wiley   +1 more source

From ID-TIMS U-Pb dating of single monazite grain to APT-nanogeochronology: application to the UHT granulites of Andriamena (North-Central Madagascar)

BSGF - Earth Sciences Bulletin
The causes of U-Pb isotopic discordance documented by Paquette et al. (2004) in monazite grains from the ultra-high temperature (UHT) granulite of the Andriamena unit of Madagascar are re-evaluated in the light of nanoscale crystal-chemical ...
Turuani M.J., Seydoux-Guillaume A.-M., Laurent A.T., Fougerouse D., Harley S.L., Reddy S.M., Goncalves P., Saxey D.W., Michaud J., Montel J.-M., Nicollet C., Paquette J.-L.   +11 more
doaj   +1 more source