Results 31 to 40 of about 858 (191)
, 2021 Olivine-hosted melt inclusions have the potential to provide direct evidence about the nature of the mantle sources of magmas. In this study, we report the major and trace element and Sr-Nd-Pb-Hf isotope compositions of the Lijiang picrites from the ...
Ren, Zhong-Yuan +13 more
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GEUS Bulletin, 2022 The Palaeogene volcanic succession in the northern part of the Nuussuaq Basin in West Greenland comprises three formations: the Vaigat and Svartenhuk Formations of Paleocene age (61–58 Ma) and the Naqerloq Formation of Eocene age (57–54 Ma).
Jørgen Gutzon Larsen +1 more
doaj +1 more source
, 2021 Table S1-1: Olivine compositions of Menglian picrites; Table S1-2: Clinopyroxene compositions of Menglian picrites; Table S1-3: Spinel compositions of Menglian picrites; Table S2: Major and trace elements of picrites-basalts in the Baoshan-Gongshan block;
Li Su (11009464), et al. (281964)
core +1 more source
Frontiers in Earth Science, 2018 The Late Permian Emeishan large igneous province (ELIP) is considered to be one of the best examples of a mantle plume derived large igneous province. One of the primary observations that favor a mantle plume regime is the presence of ultramafic volcanic
J. G. Shellnutt, Thuy T. Pham
doaj +1 more source
1.90-1.88 Ga arc and back-arc basin in the Orijärvi area, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 2002 The Orijärvi area within the Uusimaa Belt is a key area in resolving the stratigraphy and tectonic setting of the Southern Svecofennian Arc Complex in southern Finland.
M. Väisänen, I. Mänttäri
doaj +1 more source
Lithostratigraphy, geology and geochemistry of the volcanic rocks of the Vaigat Formation on Disko and Nuussuaq, Paleocene of West Greenland [PDF]
Geological Survey of Denmark and Greenland Bulletin, 2017 The Paleocene volcanic rocks in the Nuussuaq Basin on Disko and Nuussuaq comprise the Vaigat Formation (c. 62–61 Ma) and the Maligât Formation (c. 60 Ma). The Vaigat Formation in this area is 0–1600 m thick and is dominated by olivine-rich picrites.
Asger Ken Pedersen +2 more
doaj
Model for the origin, ascent, and eruption of lunar picritic magmas [PDF]
American Mineralogist, 2017 A model for the origin, ascent, and eruption of the lunar A17 orange glass magma has been constructed using petrological constraints from gas solubility experiments and from analyses of the lunar sample 74220 to better determine the nature and origin of this unique explosive eruption. Three stages of the eruption have been identified.
Rutherford, Malcolm +4 more
openaire +1 more source
Differences in composition of chromites from low-Ti and high-Ti picrites of the Emeishan large igneous province and comparison with chromites of the UG-2 platinum-deposit of the Bushveld Complex [PDF]
, 2022 Chromite is among the first minerals to crystallize from mantle derived magmas and one of the last to be consumed during partial melting of the mantle. Chromite is also an important mineral in major ore deposits of Cr and Pt.
Pagé, Philippe +5 more
core +1 more source
Picrites of the Kamchatka–Koryak Region
Russian Journal of Pacific GeologyBased on new data on tectonic evolution of Kamchatka and Koryakia (NE Russia) chemical composition of ultramafic volcanics (picrites) are characterized. Ultramafic rocks of the studied territory are divided into two petrochemical types: 1) comparable with normal (N-MORB) and transitional to enriched (T-MORB) basaltoids of the ocean and 2) comparable ...
Z. G. Badredinov, B. A. Markovsky
openaire +2 more sources
Petrogenesis of picrites from the Caribbean Plateau and the North Atlantic magmatic province
, 1999 We studied the petrography, mineralogy and geochemistry of picrites from three different regions: the island of Curaçao which forms part of a Cretaceous oceanic plateau; Iceland, an active hot spot on the mid-Atlantic ridge; and the early Tertiary ...
Tarney, J. +5 more
core +1 more source