Results 11 to 20 of about 75,440 (306)

Magmatic sulfides in high-potassium calc-alkaline to shoshonitic and alkaline rocks [PDF]

open access: yesSolid Earth, 2020
We investigate the occurrence and chemistry of magmatic sulfides and their chalcophile metal cargo behaviour during the evolution of compositionally different magmas from diverse geodynamic settings both in mineralised and barren systems.
A. A. Georgatou, M. Chiaradia
doaj   +6 more sources

Alteration of high alkaline and alkaline basaltic rocks: parent rocks in the Lava Durian orchard, Sisaket Province, NE Thailand [PDF]

open access: yesHeliyon, 2021
Lava Durian Sisaket is the first geographically identified (GI) fruit related to the volcano in Thailand and distributed in three districts of Sisaket Province, the southernmost edge of the Khorat Plateau.
Vimoltip Singtuen   +5 more
doaj   +3 more sources

Petrogenesis and relationship with REE mineralization of the quartz syenite from Chishan and Longbaoshan alkaline complex, southeastern North China Craton: Insights from zircon U–Pb geochronology, element, and Sr–Nd–Pb–Hf isotope geochemistry

open access: yesFrontiers in Earth Science, 2023
Mesozoic alkaline complexes associated with the rare earth element (REE) mineralization are developed in southeastern North China Craton (NCC), and they recorded some important information about the lithospheric thinning and destruction of the NCC ...
Pengfei Wei   +11 more
doaj   +1 more source

The Encantada Granite: registration of a peraluminous intrusion in the Rondonian Province - San Ignacio, in SW Amazonic Craton, Mato Grosso, Brazil [PDF]

open access: yesGeologia USP. Série Científica, 2015
The Encantada Granite occurs on the extreme southwest of the state of Mato Grosso, SW of the Amazonian Craton, near the border of Brasil/Bolívia. It corresponds to an body oriented to NNW direction that intruded metasedimentary and metavolcanic rocks ...
Brena Verginassi do Nascimento   +2 more
doaj   +1 more source

Relationship of ore properties and alteration of the Büyük Kuluncak (Malatya) Nb - U - NTE - Zr - Li deposit

open access: yesBulletin of the Mineral Research and Exploration, 2022
Rare Earth Elements (REE) + Niobium (Nb) + Uranium (U) + Zircon (Zr) + Lithium (Li) formations are investigated which are related with alkaline Upper Cretaceous - Lower Paleocene Kuluncak Syenitoid that settled by cutting the Kuluncak ophiolite in the ...
Okan Pulat   +2 more
doaj   +1 more source

Relationship between Degree of Deformation in Quartz and Silica Dissolution for the Development of Alkali-Silica Reaction in Concrete. [PDF]

open access: yes, 2017
This paper presents research on the influence of quartz deformation in aggregates for the development of the alkali-silica reaction in concrete and its relationship with silica dissolution.
Dal Molin, Denise   +4 more
core   +1 more source

Alkali magmatism on Mars: an unexpected diversity

open access: yesComptes Rendus. Géoscience, 2021
Despite an apparent north/south topographic dichotomy that formed ${>}$4.0 Ga, the young Martian meteorites (${
Sautter, Violaine, Payre, Valerie
doaj   +1 more source

Experimental constraints on amphibole stability in primitive alkaline and calc-alkaline magmas [PDF]

open access: yes, 2017
Equilibrium crystallization experiments were carried out on two primitive basaltic rocks (APR16: Na2O+K2O=4.40 wt%; CM42: Na2O+K2O=2.59 wt%) with the aim to investigate the amphibole stability in the differentiation processes at deep crustal level, of
Bonechi, Barbara   +4 more
core   +1 more source

Heterogeneity of alkaline lacustrine source rocks of the lower Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, northwestern China

open access: yesEnergy Exploration & Exploitation, 2023
The alkaline lacustrine source rocks in the lower Permian Fengcheng Formation in the Mahu Sag, Junggar Basin, China, exhibit significant heterogeneity. However, most previous studies have focused on the vertical variability of the source rocks, and the ...
Baoli Xiang   +3 more
doaj   +1 more source

Post-collisional Tertiary–Quaternary mafic alkalic magmatism in the Carpathian–Pannonian region: a review [PDF]

open access: yes, 2004
Mafic alkalic volcanism was widespread in the Carpathian–Pannonian region (CPR) between 11 and 0.2 Ma. It followed the Miocene continental collision of the Alcapa and Tisia blocks with the European plate, as subduction-related calc-alkaline magmatism was
Albarede   +75 more
core   +1 more source

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