Results 61 to 70 of about 9,282 (261)
MINERALOGICAL-PETROGRAPHIC FEATURES OF SYENITIC MIGMATITES OF THE ILMENOGORSKY MIASKITE BLOCK (SOUTH URALS) [PDF]
Минералогия, 2019 Syenitic migmatites of the contact of the Ilmenogorsky miaskite block are characterized by high (>500 ppm) contents of REEs, which are mainly hosted in fluorapatite and titanite of the leucosome.
А.B. Nemov +3 more
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.Abstract Understanding the transition from oceanic to continental subduction is critical for reconstructing the geodynamic evolution of orogens and constraining ancient plate boundaries. The Sulu orogenic belt in eastern China was formed by Triassic deep subduction of the South China Block (SCB) beneath the North China Block (NCB). Its architecture was
Lingtong Meng +6 more
wiley +1 more source
On the ages of some granitoid and schist complexes in northern Finland [PDF]
Bulletin of the Geological Society of Finland, 1982 Contact observations and most radiometric datings indicate that the large complex of granitoid rocks and migmatites in Central Lapland is late Svecokarelian (Proterozoic) in age. The geological setting of the complex suggests, however, that it previously
R. Lauerma
doaj +1 more source
Stability and isotopic dating of monazite and allanite in partially molten rocks: examples from the Central Alps [PDF]
, 2018 We investigated the stability of monazite and allanite as a function of bulk rock composition within several types of Tertiary Alpine anatexites, characterized by different compositions and melting reactions, but similar P-T conditions of melting.
Berger, Alfons +2 more
core
The Neoproterozoic-early Paleozoic metamorphic and magmatic evolution of the Eastern Sierras Pampeanas: an overview [PDF]
, 2010 The Eastern Sierras Pampeanas were structured by three main events: the Ediacaran to early Cambrian (580–510 Ma) Pampean, the late Cambrian–Ordovician (500–440 Ma) Famatinian and the Devonian-Carboniferous (400–350 Ma) Achalian orogenies ...
Drobe, Malte +5 more
core +1 more source
Radiogenic Heating as the Thermal Driver of Himalayan Crustal Heating During Prolonged Thickening
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 11, November 2025.Abstract The thermal evolution of the crust during continental collision evolves from cold to hot with time, which impacts crustal reworking and differentiation. However, it remains elusive as to the mechanism driving the crust to be hot during the protracted collision.
Shuaiqi Liu +4 more
wiley +1 more source
Tectonics and mineralization in Sri Lanka [PDF]
Bulletin of the Geological Society of Finland, 1985 Over nine-tenths of Sri Lanka is underlain by Precambrian metasedimentary rocks, granitic gneisses and migmatites. The Highland Series (granulite facies), made up of typical metasedimentary rocks ‒ quartzites, marble, white granulites and granulitic ...
P.W. Vitanage
doaj +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.Abstract Mafic eclogites of the Tauern Window in the Eastern Alps preserve vein networks associated with eclogite‐facies mineral assemblages. The structural and mineralogical diversity of these veins is encapsulated by Type I veins, which resemble deformed tension gashes, and Type II quartz segregates with non‐planar morphologies. Within host eclogites,
L. A. Strobl +3 more
wiley +1 more source
When do we need pan-global freeze to explain ^(18)O-depleted zircons and rocks? [PDF]
, 2011 Rocks with δ^(18)O values of less than 5‰ SMOW (Standard Mean Ocean Water) contain oxygen derived from ∼0‰ seawater or meteoric (rain or melted snow,
Bindeman, Ilya
core +1 more source
Geochemistry, Geophysics, Geosystems, Volume 26, Issue 10, October 2025.Abstract The Zagros orogen records the closure of the Neotethys Ocean by northward subduction of the oceanic slab beneath the Iranian plate. Northwestern Iran has undergone episodic volcanism since the Eocene, due to a shift of tectonic regimes from subduction to collision and post‐collisional extension, although the dynamics responsible for such ...
Farzaneh Shakerardakani +5 more
wiley +1 more source