Hydraulic properties of the crystalline basement

Stober, Ingrid; Bucher, Kurt

doi:10.1007/s10040-007-0214-9

Cited by 137 publications

(13 citation statements)

References 47 publications

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“…Matthess 1970;Strayle et al 1994;Stober and Bucher 2007) identified decreasing hydraulic conductivity (k f value) due to decreasing joint aperture, which reduces with increasing depth. Decreasing aperture may also occur because of the generation of secondary minerals through rock weathering.…”

Section: Hydraulic Propertiesmentioning

confidence: 94%

“…The ranges of hydraulic conductivities match data for the Bunter strata published by Matthess (1970). The k f values represent hydraulic conductivity of the fissured sandstone aquifer and combine both matrix and fracture permeability (Dürbaum et al 1969;Stober and Bucher 2007). However, matrix permeability in the Bunter sandstone sequence may be significantly reduced due to high amounts of fine-grained clay minerals in the matrix.…”

Section: Hydrogeologymentioning

confidence: 98%

See 1 more Smart Citation

Hydrochemical Groundwater Evolution in the Bunter Sandstone Sequence of the Odenwald Mountain Range, Germany: A Laboratory and Field Study

Ludwig¹,

Stober

Bucher

2011

Aquat Geochem

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Field and laboratory investigations were performed to identify the principal mechanisms of the hydrochemical groundwater evolution among low mineralised groundwater in the Triassic Bunter sandstone aquifer of the Odenwald low mountain range, central Germany. Hydrochemical composition comprises low pH, SO 4 -rich shallow groundwaters issued by springs (Ca-Mg-SO 4 -type) grading to SO 4 -poor deep groundwaters with near-neutral pH (Ca-HCO 3 -type). Batch experiments of the original rock were run to determine primary mineral alteration reactions and the origin of dissolved ions. Principal experimental reactions comprise the decomposition of anorthite, K-feldspar, biotite and jarosite as mineral components of the original sandstone rock and the formation of clay minerals of the smectite group (Ca-montmorillonite, beidellite), and iron hydroxides as secondary minerals. Mobilisation of fluid inclusion in quartz grains contributes to Na and Cl concentrations in the leachates. The evolution of deep groundwater circulation proceeds by mineral alteration reactions calculated by the inverse modelling of both primary and secondary minerals to produce low-T mineral phases. The dissolution of K-feldspar converts Ca-montmorillonite to illite (illitisation). The formation of Na-beidellite correlates with decreasing concentration of Na in solution. Mineral reactions further proceed to the formation of kaolinite as stable mineral phase. As indicated by modelled adsorption curves, the decrease of SO 4 concentrations during groundwater evolution relates to the adsorption of SO 4 on iron hydroxides. The leaching of calcite indicated for individual groundwaters relates to the distribution of loess in the appropriate catchment areas.

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Section: Hydraulic Propertiesmentioning

confidence: 94%

Section: Hydrogeologymentioning

confidence: 98%

Hydrochemical Groundwater Evolution in the Bunter Sandstone Sequence of the Odenwald Mountain Range, Germany: A Laboratory and Field Study

Ludwig¹,

Stober

Bucher

2011

Aquat Geochem

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“…Dynamic seismic observing proposed a broad process zone up to 40 ft in the breadth of also, IN2L. Additionally demonstrated that micro-seismic occasions were restricted to the most permeable zones inside of the puncturing interim (Stober & Bucher, 2007). For one well, the micro-seismic occurrences happened symmetrically in a vertical plane around the wellbore, while for another indeed, the occasions were very uneven.…”

Section: Introductionmentioning

confidence: 93%

Hydrofracture Properties via Signals from Hydraulic Pumps, an Overview

Fayaz¹,

Tjprc²

2018

IJMPERD

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“…The crystalline Odenwald with maximum altitudes of about 600 m above sea level has been tectonically uplifted by 450 m compared to the Hessian Reed (HR). Groundwater flow is mainly restricted to weathered layers of the crystalline rocks with thicknesses up to 30 m or to fissures of the fractured rock (Stober, 1997;Stober and Bucher, 2007). The annual amount of precipitation in the area of the crystalline Odenwald varies between 700 and 1300 mm/a with high values at the western windward side and lower values at the leeward side.…”

Section: Study Areamentioning

confidence: 99%