Weathered Granite Porosity

Riebe was corresponding author of a paper titled porosity production in weathered rock.

Weathered granite porosity.

Some may be no bigger than a grain of sand. Cores of granite basement show a weathering rind of altered feldspars with the weathered surface displaying the smooth curve that forms. Article osti 6116963 title porosity permeability and their relationship in granite basalt and tuff author abstractnote this report discusses the porosity storage and permeability of fractured mainly crystalline rock types proposed as host rock for nuclear waste repositories. The emphasis is on the inter relationships of these properties but a number of reported.

It s formed from the natural weathering and erosion of solid granite a tough hard igneous rock. Weathering in mountain landscapes creates porosity in rock saprolite and soil near earth s surface through a combination of volumetric strain and chemical mass loss. Once plagioclase weathering begins porosity increases significantly and the mass surface fractal typical for unweathered granite transforms to a surface fractal as infiltration of fluids continues. Considering that the porosity of the weathered granite increases about four times with reference to the fresh granite the uptake of calcium and sulphate from joint mortars is possible through.

Weathering in the critical zone causes volumetric strain and mass loss thereby creating subsurface porosity that is vital to overlying ecosystems. The dg sold as landscaping material is typically composed of fine three eighths inch or smaller particles. Decomposed granite is like gravel but finer and generally more stable. We used geochemical and geophysical measurements.

The c m class bedrock cores had almost no effective porosity i e the amount of porosity that effectively contributes to water flow. The hydraulic properties of weathered granite at other sites followed the trends observed at our sites implying wide applicability of the findings in this study to various types of weathered granite. Porosity and permeability measurements from 8 8 cm diameter core cylinders can be organized to establish details of exploration and. Where volumetric strain dominates over chemical mass loss which was published today sept.

18 in science advances an offspring publication of science.