They are petrographicaly identified as dolerites and lamprophyres
. The dolerites are texturally basaltic, doleritic and gabbroic and are altered compare to lamprophyres
Guo et al., "Mechanical property-variation under dynamic uniaxial compression and micro-mechanism of lamprophyre
in saturated state," Journal of the China Coal Society, vol.
Hu, "The logging interpretation for Lamprophyre
," ACTA Petrolei Sinica, vol.
Nemec, D.: 1977, Differentiation of lamprophyre
magma, Krystalinikum, 13, 73-87.
In field measurement, before forced caving measures such as hydraulic fracturing and presplitting blasting, the first breaking span of the 20-meter-thick lamprophyre
can reach about 110 m, and the periodic breaking span of the 20-meter-thick lamprophyre
can reach between 65 m and 75 m.
The rock in the second vent is a quartz porphyry which also contains topaz, and there is a long contact zone into which a lamprophyre
The Discover Abitibi Initiative (DAI) recently released the results of a lamprophyre
study, designed to determine the diamond bearing potential of lamprophyres
in Timmins, Kirkland Lake and Timiskaming areas.
In the Montreal area such rocks are mostly alkaline syenite, monzonite, basanite or alkali olivine basalt, and lamprophyre
, especially camptonite (Hodgson, 1968; Eby, 1985).
0.025-0.015 Ga: An important intraplate event is the widespread Behm Canal event [#29a] of the Cordillera, which is also known as the Tertiary Lamprophyre
The diatreme consists of a large mass of breccia intruded by bodies of phonolite, plagioclase phonolite (historically called latite phonolite), tephriphonolite (historically called syenite), and lamprophyre
(historically called alkali basalt) (Kelley, 1996; Pontius, 1996).
Cabo Mining out of Vancouver has struck an interesting twist in Lorraine Township south of Cobalt with the discovery of diamonds in lamprophyre
and associated heterolithic breccias, similar to diamond discoveries made in Wawa, he says.
There will also be lamprophyre
sampling, kimberlite (diamond) geochemistry, a seismic profile and regional gravity surveys.