Results 21 to 30 of about 858 (191)

Chemical heterogeneity of the Emeishan mantle plume: Evidence from highly siderophile element abundances in picrites [PDF]

, 2013
Highly magnesian lavas or picrites have the potential to preserve important information about the origin and thermochemical state of the mantle source(s) of large igneous provinces.
Y. Xu (741407), J. Xu (14896), J. Li (51350), Xuan-Ce Wang (2855135), B. He (5966300), Z. Ren (4525288)   +5 more
core   +2 more sources

KIMBERLITE-LIKE ROCKS OF THE URIK-IYA GRABEN, EASTERN SAYAN REGION: MINERAL COMPOSITION, GEOCHEMISTRY AND FORMATION CONDITIONS

Геодинамика и тектонофизика, 2020
The study of the Bol’shaya Tagna alkaline-carbonatite massif and adjacent areas was focused on the mineral and chemical compositions of minerals, the distribution of petrogenic and trace elements in pyroxene-free alkaline picrites in veins and dikes ...
V. B. Savel'eva, Yu. V. Danilova, E. P. Bazarova, B. S. Danilov   +3 more
doaj   +1 more source

The 1.88 Ga Kotalahti and Vammala nickel belts, Finland: Geochemistry of the mafic and ultramafic metavolcanic rocks [PDF]

Bulletin of the Geological Society of Finland, 2009
The mafic and ultramafic volcanic rocks within the Svecofennian (1.88 Ga) Kotalahti and Vammala Nickel Belts, Finland, are spatially associated and coeval with a suite of mineralized mafic-ultramafic intrusions.
S.J. Barnes, H.V. Makkonen, S.E. Dowling, R.E.T. Hill, P. Peltonen   +4 more
doaj   +1 more source

Sr‐Enriched Glassy Picrites From the Karoo Large Igneous Province are Evolved, not Primitive Magmatic Rocks

Geochemistry, Geophysics, Geosystems, 2021
Magmatic products of the Karoo Large Igneous Province can be divided into a volumetrically dominant, compositionally uniform low‐Ti tholeiitic suite, and a subordinate, geographically restricted, compositionally diverse, incompatible‐rich high‐Ti suite ...
Lewis D. Ashwal, Alexander Ziegler, Sarah Glynn, Tristan Truebody, Robert Bolhar   +4 more
doaj   +1 more source

Olivine in picrites from continental flood basalt provinces classified using machine learning

, 2022
Picrites, dominantly composed of highly forsteritic olivine, can serve as important constraints on primary magma composition and eruption dynamic processes in global continental flood basalt (CFB) provinces. Picrites are commonly divided into high-Ti and
Wang, Yu, Cheng, Lilu, Yang, Zongfeng, Yu Wang, Zongfeng Yang, Lilu Cheng   +5 more
core   +1 more source

Water content and hydrogen isotope composition of olivine-hosted melt inclusions in Dali picrites, SW China: reassessing the role of water in the formation of the Emeishan large igneous province

, 2023
S1. Compositions of olivine phenocrysts from theDali picrites, Emeishan LIP (wt. %)；S2. Calculated compositions of melt inclusions and forsterite contents of their host olivines from the Dali picrites, Emeishan LIP (wt. %)；S3.
chen, Q (via Mendeley Data), chen, qijing   +1 more
core   +2 more sources

Petrogenesis of the Tuli Basin high-Ti picrites and basalts, Karoo CFB, southern Africa: Classification, stratigraphy, emplacement, and mantle source heterogeneity

, 2023
The Tuli Basin represents one of the larger erosional remnants of the rift-related sequences of the Karoo continental flood basalts (CFB) of southern Africa.
Zartman, Robert E., Heinonen, Jussi S., Howarth, Geoffrey H., Duncan, Andy R., Richardson, Stephen H., le Roex, Anton, Marsh, Julian S., Harris, Chris, Carlson, Richard W.   +8 more
core   +1 more source

Data for: Geochemistry of the Luenha picrites, central Mozambique - evidence of a mantle plume source for Karoo continental flood basalts?

, 2020
The major and trace element composition, Sr and Nd isotopic composition, parental and primary melt composition, contamination modelling parameters and primary melt crystallization temperatures of 180 Ma Luenha picrites, Karoo large igneous province ...
Turunen, S (via Mendeley Data), Turunen, Sanni   +1 more
core   +2 more sources

Noble metal geochemistry of the Mesoproterozoic igneous complexes Bashkirian meganticlinorium and the eastern edge of the East European Platform

Литосфера, 2018
First described the noble metal (platinum group elements (PGE) and Au) geochemical specialization of magmatic rocks of Bashkirian meganticlinorium and the adjacent part of the East European Platform (EEP).
Sergei G. Kovalev, Sergei S. Kovalev, Sergei I. Vysotsky   +2 more
doaj   +1 more source

Eruption Rates, Tempo, and Stratigraphy of Paleocene Flood Basalts on Baffin Island, Canada

Geochemistry, Geophysics, Geosystems, 2022
High‐temperature melting in mantle plumes produces voluminous eruptions that are often temporally coincident with mass extinctions. Paleocene Baffin Island lavas—products of early Iceland mantle plume activity—are exceptionally well characterized ...
Joseph Biasi, Paul Asimow, Forrest Horton, Xenia Boyes   +3 more
doaj   +1 more source