scholarly journals Distribution and chemical composition of the Middle Miocene Basaltic Rocks in Akita-Yamagata oil fields of northeastern Japan.

1988 ◽  
Vol 94 (8) ◽  
pp. 591-608 ◽  
Author(s):  
Nobuyuki TSUCHIYA
Keyword(s):  
Chemical Composition ◽  
Middle Miocene ◽  
Oil Fields ◽  
Basaltic Rocks ◽  
Northeastern Japan

CO2 sequestration in basaltic rock at the Hellisheidi site in SW Iceland: stratigraphy and chemical composition of the rocks at the injection site

2008 ◽  
Vol 72 (1) ◽  
pp. 1-5 ◽  
Author(s):  
H. A. Alfredsson ◽  
B. S. Hardarson ◽  
H. Franzson ◽  
S. R. Gislason
Keyword(s):  
Chemical Composition ◽  
Injection Site ◽  
Co2 Sequestration ◽  
Basaltic Rock ◽  
Field Site ◽  
Basaltic Rocks

AbstractStorage of CO2 as solid Ca, Mg, and Fe carbonates in basaltic rocks may provide a long-lasting solution for reduction of industrial CO2 emissions. Here, we report on the underground stratigraphy of the chemical composition and crystallinity of rocks and their alteration state at a targeted field site for injection of CO2-charged waters, the Hellisheidi area in SW Iceland.

scholarly journals Biostratigraphic re-evaluation of the lower to middle Miocene succession in the Eastern Carpathians: a case study related to the oil fields of the Diapir Fold Zone, Romania

2020 ◽  
Vol 64 (3) ◽  
Author(s):  
Sorin FILIPESCU ◽  
Dan M. TĂMAS ◽  
Răzvan-Ionut BERCEA ◽  
Alexandra TĂMAS ◽  
Ramona BĂLC ◽  
...  
Keyword(s):  
Middle Miocene ◽  
Oil Fields ◽  
Eastern Carpathians

The origin and petrogenetic significance of hour-glass zoning in titaniferous clinopyroxenes

1973 ◽  
Vol 39 (302) ◽  
pp. 133-144 ◽  
Author(s):  
Suzanne Y. Wass
Keyword(s):  
Chemical Composition ◽  
New South ◽  
Morphological Development ◽  
Basaltic Rocks ◽  
Host Magma ◽  
Tetrahedral Sites ◽  
South Wales ◽  
Fe Content ◽  
Coupled Substitution ◽  
Initial Crystal

SummaryTertiary alkali basaltic rocks from the Southern Highlands, New South Wales, contain two types of clinopyroxene crystals, which exhibit excellent morphological development of hour-glass zoning. These are small, quench clinopyroxene crystals and large, abundant, euhedral phenocrysts. Electron microprobe analyses show that the different zone sectors derive from compositional differences, with variation in TiO2 and Al2O3 contents inversely with SiO2 content being most significant. Increased depth of colour of titanaugites depends on increased coupled substitution of Al for Si in tetrahedral sites and of Ti3− in an M1 site, while pleochroism is enhanced by increasing Fe content. It is suggested that the formation of hour-glass zoning is determined by an environment of crystallization where initial crystal growth is rapid relative to ionic diffusion in the melt, resulting in different chemistry for different growth directions within the crystal. This implies that, under certain conditions, kinetic factors, as well as the chemical composition of the host magma, may be significant in determining the chemical composition of phases precipitated, particularly where more than one crystallographic direction of growth is possible.

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