نتایج جستجو برای: diabase
تعداد نتایج: 134 فیلتر نتایج به سال:
High core recovery at Ocean Drilling Program (ODP) Leg 210, Site 1276, provided a high-resolution porosity-depth relationship and an equally impressive age-depth model based on first and last occurrences of microfossils. Site 1276 was drilled over transitional crust in the Newfoundland nonvolcanic margin, offshore Canada, between known continental crust on the west and apparent oceanic crust on...
The coefficient of thermal expansion (CTE) of a typical concrete-paving mixtures made with six different types of coarse aggregates, obtained from fifteen different sources in Wisconsin, was determined. These aggregates belonged to the basic class of glacial gravel, quartzite, granite, diabase, basalt, and dolomite. A total of fifteen different concrete mixtures were used in this study. Triplic...
Rare earth abundances were determined by neutron activation in twenty Hawaiian lavas and one diabase of known chemical and mineralogical compositions. These results demonstrate a systematic relationship between the absolute or relative rare earth abundances and the petroehemistry of these rocks. Three distinct lava groups are recognized. These correspond to: (1) tholeiites, (2) alkali series, (...
Classical locality Vyskočilka in the Barrandian Basin displays a well-exposed section of black Silurian shales penetrated by ca. 10-m thick diabase sill. We examined petrographic character and mineral composition intrusive body enclosing shales, as well hydrothermal veins cutting rocks. The is rock with basic affinity (paleobasaltoid), which was strongly influenced post-magmatic alterations inc...
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