Inducing Fracture With Granitic Bedrock

A geostatistical method geofrac that can incorporate orientations of sampled data was applied to 50 900 borehole fractures for spatial modeling of fractures over a 12 km by 8 km area to a depth of 1 5 km.

Inducing fracture with granitic bedrock. The granitic bedrock is sufficiently weathered to meet paralithic materials criteria but is not so intensively weathered to be considered saprolite. Geofrac produced a plausible 3d fracture model in that the orientations of simulated fractures correspond to those of the sample data and. Quantitative mapping and statistical evaluation of fracture minerals in the granitic bedrock at forsmark sweden martin löfgren1 magnus sidborn2 received. Most of the bedrock was formed between 1900 and 1850 million years ago and has been subjected to both ductile and brittle deformation hermansson et al.

Thus differences in fracture density could help explain the lithologic control of vegetation shown in fig. The matrix matrix rind fracture rind fracture coating and fracture fill. Sheeting fractures and exfoliation domes commonly develop in areas with soft highly fractured bedrock. Density of bedrock fractures.

True quartz is quite resistant to weathering and is an important component of sands in riverbeds and on beaches. Concerning fracture mineral layers their presence in open partly open and sealed fractures have been characterised as well as in the occasional crush zone. We utilized the luquillo critical zone observatory lczo in puerto rico to test the hypothesis that mineral derived fe ii within the granitic bedrock at lczo is capable of supporting microbial fe ii based chemolithotrophy and that the resultant redox driven mineralogical transformations contribute to bedrock weathering. The migration of the uranium u in high level radioactive waste that is held in deep geological repositories via fractures in deep granite aquifers i.

Higher bedrock fracture density could promote vegetation by providing footholds for roots and reservoirs for water storage 20 33. 29 february 2016 published online. Discrete water bearing zones within fractured granitic bedrock at low yields 0 1 gallons per minute gpm and 0 3 gpm in the two study areas that limit remedial options. A pilot study involving creation of two fractured bedrock zones northern and southern fbzs was conducted at site 37 edwards afb ca.

While this hypothesis had been postulated based on theoretical. Ground water occurs in discrete water bearing zones within fractured granitic bedrock at low yields 0 1 gallons per minute gpm and 0 3 gpm in the two study areas that limit. Citeseerx document details isaac councill lee giles pradeep teregowda. 9 march 2016 the author s 2016.