Wall Rock

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wall rock

[′wȯl ¦räk]
(geology)
Rock that encloses a vein.

Wall Rock

 

mountain rock lying directly against a layer or vein of mineral ore. Wall rock is called the roof or floor of a deposit when in a sloping or gently inclined position; it is called the hanging or lying side when it is on a steep incline. The properties and condition of the wall rock influence the selection of the system of extracting minerals, as well as the technical-economic indexes of the construction and exploitation of mining enterprises.

References in periodicals archive ?
The fractal model could be applied for defining sulfidic mineralized zones, especially high accumulation of sulfide minerals from the wall rocks, or from the background, based on data obtained from IP/RS exploration.
This alteration type commonly occurs as replacements of wall rock adjacent to early stage quartz-pyrite-fluorite [+ or -] hubnerite [+ or -] sphalerite veins and represents a greisen type of alteration.
In this method, wall rock has to be cut to make operation space.
No evaluation of possible larger scale open pit mining of lower grade material including the high grade shoots, their lower grade portions, stockworks of small veinlets, and intervening low grade, but extensively altered wall rock was attempted.
These consisted of grab samples of quartz veins and enclosing wall rocks left in piles next to the workings by the artisanal miners.
As previously reported, the first round of sampling over the mineralized zone on the property included 79 samples of jasperoid and siliceous wall rocks discontinuously exposed over about three quarters of a mile of strike length.
2 g/t Au in narrow veins while granitic wall rocks assayed 2.
The first round of sampling included 79 samples of jasperoid and siliceous wall rocks discontinuously exposed over about three quarters of a mile of strike length, assays of which averaged almost 6 ounces of silver per ton.
Radius' historic sampling indicates that the veins and their oxidized wall rocks have the potential to host significant gold mineralization.
Samples Z-3 and Z-4 were taken from the wall rocks adjacent to the main Solaga vein.
These consist of grab samples of quartz veins and enclosing wall rocks, and also of rejects brought to the surface by artisinal miners.
A key finding was that, as suspected, significant gold values continue into the wall rocks of the veins opening up potential for a bulk tonnage target.