Results 41 to 50 of about 3,013 (217)

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source

Identifying mantle carbonatite metasomatism through Os-Sr-Mg isotopes in Tibetan ultrapotassic rocks

, 2015
Mantle-derived magmas at convergent plate boundaries provide unique insights into the nature of materials subducted to and recycled from depths. Here we present a study of Os–Sr–Mg isotopes on the Oligocene–Miocene ultrapotassic rocks aimed at better ...
Wang, Q., DePaolo, D.J., Widom, Elisabeth, Xu, J.F., Widom, E., Mo, Xuanxue, Niu, Yaoling, Wang, Qing, Zhan, Z.D., Mo, X.X., Liu, Dong, DePaolo, Donald J., Zhao, Zhidan, Teng, Fang-Zhen, Ke, S., Xu, Ji-Feng, Teng, F.-Z., Zhu, D.-C., Zhu, Di-Cheng, Ke, Shan, Liu, D.   +20 more
core   +1 more source

Re-os isotope constraints on the age of the Lithospheric mantle beneath western Greenland. [PDF]

, 2007
Alkaline magmatic activity across Western Greenland (W.G.) provides a record of lithosphere evolution over the last 600 Ma. Ultra Mafic Lamprophyre (UML) magmatism in particular has erupted an exceptional inventory of mantle xenoliths allowing a detailed
Webb, Michelle
core  

Ultramafic xenoliths from the Bearpaw Mountains, Montana, USA: evidence for multiple metasomatic events in the lithospheric mantle beneath the Wyoming craton

, 2004
Ultramafic xenoliths in Eocene minettes of the Bearpaw Mountains volcanic field (Montana, USA), derived from the lower lithosphere of the Wyoming craton, can be divided based on textural criteria into tectonite and cumulate groups. The tectonites consist
James, D., MacDonald, R., Bodinier, J.L., Mason, P.R.D., Cox, K.G., Downes, Hilary, Hill, P.G., Upton, B.G.J., Hearn, B.C.   +8 more
core   +1 more source

Slab Tearing and Recycled Continental Sediments in the Lithospheric Mantle: Geodynamic Insights From Miocene Alkaline Rocks of the Tangra‐YumCo Rift, Southern Tibet

Geochemistry, Geophysics, Geosystems
Mantle metasomatism is a common phenomenon in convergent margins; however, metasomatism by subducted sediments and their role in alkaline magma generation remain poorly understood.
Esteban Jarquín, Rui Wang
doaj   +1 more source

ONTOGENETIC APPROACH TO THE METASOMATISM THEORY [PDF]

Минералогия, 2016
Metasomatism is a phenomenon of substitution of some minerals by other minerals under simultaneous dissolution of early minerals and crystallization of late minerals.
V.A. Popov
doaj  

Ancient Metasomatism in the Lithospheric Mantle, Eastern North China Craton: Insights from In-Situ Major and Trace Elements in Garnet Xenocrysts, Mengyin District

, 2023
Mantle metasomatism refers to the interaction between mantle melt, fluid, and mantle rock. It not only affects the physical and chemical properties of the lithospheric mantle but also plays an important role in the process of metal and gem mineralization.
Nan Li, Zhi-Yuan Chu, Wen-Yan He, Hao-Shuai Wang, Li-Qiang Yang, Liang Zhang, Ya-Nan Zhang, Yi-Qi Wang   +7 more
core   +1 more source

Time constraints on the formation of lithospheric mantle beneath cratons: a re-Os isotope and platinum group element study of peridotite xenoliths from northern Canada and Lesotho, [PDF]

, 2001
Understanding the generation and evolution of cratonic lithospheric keels requires detailed knowledge of their age, timescale of formation, and the relationship between the crust and mantle part of the lithosphere.
Irvine, Gordon James
core  

Lithosphere Modification Beneath the North China Craton: Geochemical Constraints of Water Contents from the Damaping Peridotite Xenoliths

Crystals
The water contents and geochemical evidence of nominally anhydrous minerals in peridotite xenoliths provide critical insights into lithospheric mantle features, offering a deep understanding of cratonic destruction and mantle evolution processes ...
Baoyi Yang, Bo Xu, Yi Zhao, Hui Zhang
doaj   +1 more source

Water and Oxygen Fugacity in the Lithospheric Mantle Wedge beneath the Northern Canadian Cordillera (Alligator Lake)

Geochemistry, Geophysics, Geosystems, 2018
Assessing water contents of subduction zone mantle peridotites can gain insight into the compositions of slab‐derived fluids/melts and the active margin water cycle.
McKensie L. Kilgore, Anne H. Peslier, Alan D. Brandon, William M. Lamb   +3 more
doaj   +1 more source