tar sand


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Related to tar sand: oil shale

tar sand

n. often tar sands
A type of oil sand from which the lighter fractions of petroleum have escaped and in which only the heavier fractions forming a residual asphalt remain.

tar sand

n
(Geological Science) a sandstone in which hydrocarbons have been trapped; the lighter compounds evaporate, leaving a residue of asphalt in the rock pores
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This was imposed by Edmonton in 2015 after negotiations with tar sand producers and the coalition of environmental NGOs who led the anti-Keystone XL campaign.
bringing another million barrels per day of tar sand crude oil also known as "diluted bitumen" to Gulf Coast refineries.
Northern Alberta contains the largest known deposits of tar sand, in an area roughly the size of Florida that lies under some of the largest old-growth forest remaining in the world.
Recent rises in barrel prices and developments in oil exploration have enabled companies to extract oil from earth - known as tar sand - in Canada and Venezuela.
It sounds like an appealing energy solution to some, but the environmental costs of extracting oil from Alberta's tar sand would exact a heavy toll," wrote O'Neill.
Indigenous people in Canada have been badly affected as the tar sand is mined near their settlements and has polluted hunting grounds.
Researchers working on an experiment for a Nasa mission to Mars realised their method for removing organic material from rocks could be used on Earth to process tar sand - rock mixed with bitumen.
Tar sand is composed of a mixture of bitumen, which makes up about 10-20% and about 80-85% mineral matter including sands, clays and 4-6% water.
Still, he notes that neither the specific clay-coal tar mixture nor the tar sand in general provides a perfect spectral match for Iapetus' dark stuff.
722 trillion barrels of tar sand oil lie in wait for development across the globe.
Even if you care nothing about climate change and human health, you should still support a phase-out of Alberta's tar sand projects.
What is essential in looking at the project is that Canada will produce tar sand crude regardless of whether the U.