Results 61 to 70 of about 2,601 (170)
ALLANITE-(Nd) FROM SAPFIRINOVAYA PIT, SOUTHERN URALS: FIRST FIND IN RUSSIA [PDF]
Минералогия, 2019 Allanite-(Nd) (Ca1.20Mn0.02Nd0.33Ce0.21Sm0.07Pr0.06La0.03Gd0.02Y0.01)Σ1.95(Al1.94Fe2+ 0.46Fe3+ 0.42Mg0.08Sc0 .06Ti0.01)Σ2.97[Si2 O7 ][SiO4 ]O(OH) was found first in Russia as black crystals and grains up to 0.12 mm in size in a sapphirine-bearing rock of
A.V. Kasatkin, R. Škoda, A.M. Kuznetsov
doaj
Journal of Metamorphic Geology, Volume 43, Issue 8, Page 839-862, October 2025.ABSTRACT Understanding how Paleoproterozoic orogenic processes shaped the assembly of Laurentia remains a critical puzzle in deciphering Earth's ancient tectonic history. To address this challenge, the Montana metasedimentary terrane in the northwest Wyoming Province, which preserves a complex record of multiple metamorphic episodes, provides a unique ...
Tsai‐Wei Chen +3 more
wiley +1 more source
Multiple Metamorphic Stages within an Eclogite-facies Terrane (Sesia Zone, Western Alps) Revealed by Th-U-Pb Petrochronology [PDF]
, 2017 Convergent plate margins typically experience a transition from subduction to collision dynamics as massive continental blocks enter the subduction channel. Studies of high-pressure rocks indicate that tectonic fragments are rapidly exhumed from eclogite
Cenki-Tok, B. +5 more
core
Transfer of Strontium and Carbon From Subducting Sediment Into the Leading Edge of the Mantle Wedge
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.Abstract Carbon mobilization at subduction zones can be constrained by focusing on Sr as a proxy, as Sr readily substitutes for Ca—a major cation in the crystal structures of carbonates. Unmelted high/ultrahigh pressure (HP/UHP) pelitic metasediments exhumed from less than 100 km depth along the slab‐mantle interface show loss of Sr and retention of ...
Amol Dayanand Sawant +6 more
wiley +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 8, August 2025.Abstract It is intriguing whether and how crust‐mantle interaction would proceed in continental subduction zones. Here, we report zircon U‐Pb ages and Hf isotopes, major and trace elements, and Sr‐Nd‐Mo isotopes for Late Paleozoic mafic igneous rocks from the East Kunlun orogen (EKO).
Qing‐Chen Yang +4 more
wiley +1 more source
Petrogenesis of highly fractionated I-type peraluminous granites : La Pedriza pluton (Spanish Central System) [PDF]
, 2010 The La Pedriza pluton stands out as the most extensively fractionated granite (Rb < 629; Sr < 2 and Ba < 2 ppm) of the Spanish Central System Batholith. These granites show a strong enrichment in some rare metal contents (Nb = 44, Y = 136, Yb = 10.7, U =
Pérez-Soba, Cecilia, Vilaseca, Carlos
core +4 more sources
Beneficiation of rare earth minerals from Bokan Mountain: Dotson Ridge ore [PDF]
, 2014 Thesis (M.S.) University of Alaska Fairbanks, 2014The purpose of this research work was to study the beneficiation of rare earth ore of the Bokan Mountain -- Dotson Ridge deposit, located near Ketchikan, Alaska.
Narantsetseg, Purevbaatar +1 more
core
REE mineralisation within the Ditrău Alkaline Complex, Romania: Interplay of magmatic and hydrothermal processes [PDF]
The Ditrău Igneous Complex (north-east Romania) is a tilted Mesozoic alkaline intrusion (~19 km diameter), with enrichments in rare earth elements (REE), niobium, and molybdenum. It has the potential to contribute to a secure and sustainable European REE
Gabudianu, I. +4 more
core +1 more source
Journal of Metamorphic Geology, Volume 43, Issue 6, Page 613-640, August 2025.ABSTRACT A garnet population from the lower Kalak Nappe Complex in Finnmark (Arctic Norway) was characterized using high‐resolution X‐ray micro‐computed tomography, electron probe micro‐analysis and laser ablation inductively coupled plasma mass spectrometry mapping to assess the extent of compositional equilibration and the controlling crystallization
M. T. A. G. Yogi +3 more
wiley +1 more source
Late Archean crust-mantle interactions: geochemistry of LREE-enriched mantle derived magmas. Example of the Closepet batholith, southern India [PDF]
, 1995 The Closepet batholith in South India is generally considered as a typical crustal granite emplaced 2.5 Gyr ago and derived through partial melting of the surrounding Peninsular Gneisses (3.3-3.0 Gyr). In the field, it appears as a composite batholith
Jayananda, M. +3 more
core +1 more source