In-situ stress measurements in Southwest Germany

Greiner, Gerhard

doi:10.1016/0040-1951(75)90150-x

Cited by 28 publications

(6 citation statements)

References 3 publications

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“…Most of them are based on the analysis and interpretation of earthquakes, tectonic studies, overcoring data, hydraulic fracturing data, and borehole breakouts (Greiner 1975;Baumann 1981;Larroque and Laurent 1988;Plenefisch and Bonjer 1997;Valley and Evans 2007). Figure 1 presents an extensive data compilation for the present-day stress field in the URG and shows the abovementioned major structural units of the rift system.…”

Section: Geological Settingmentioning

confidence: 99%

Inferring the in situ stress regime in deep sediments: an example from the Bruchsal geothermal site

et al. 2014

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Background: Knowledge of the ambient state of stress is of crucial importance for understanding tectonic processes and an important parameter in reservoir engineering. In the framework of the 2,500-m deep geothermal project of Bruchsal in the central part of the Upper Rhine Graben, new evidence is presented for the stress field in deep-seated sedimentary rocks. Methods: With a sophisticated data analysis based on the concept of critical stress ratios, we evaluate the quality and uncertainty range of earlier stress field models in the Bruchsal area. New data from borehole logging and leak-off tests in deep sediments are used to propose an alternative stress profile for this part of the Upper Rhine Graben.

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Section: Geological Settingmentioning

confidence: 99%

Inferring the in situ stress regime in deep sediments: an example from the Bruchsal geothermal site

et al. 2014

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“…3E), is an example of r e 1 a t i v e c o n t i n e n - K~I-bel (1970);4, Gothan& Daber (1979);5, Dorn-Lotze (1971);6, Ahmed (1980);7, Pozaryski& Pozaryska (1960);8, Stadler& Teichm~ller (1971);9, DeSitter (1956);10, Sannemann (1968);11, Rutten (1969);12, Pozarysky& Brochwicz-Lewinski (1978);13, Boigk& Sch6neich (1970);14, Ahorner (1978) and Greiner (1975); 15, Geol.Map of Czechoslovakia 1:500 000, Geol. Surv.…”

Section: Drift and Deformation In Hercynian Timementioning

confidence: 98%

Drift tectonics — The fundamental rhythm of crustal drift and deformation

Grohmann¹

1985

Geol Rundsch

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“…Crustal stress data from Europe have been collected since the 1960's (e.g. Froidevaux et al, 1980;Greiner, 1975;Greiner and Illies, 1977;Hast, 1969Hast, , 1973Hast, , 1974Kohlbeck et al, 1980;Ranalli and Chandler, 1975) and later within the framework of the World Stress Map database. These data were applied to investigate the crustal stress pattern for Western Europe (Ahorner, 1975;Carafa and Barba, 2013;Gölke and Coblentz, 1996;Klein and Barr, 1986;Müller et al, 1992), Scandinavia (Gregersen, 1992), Central Europe (Grünthal and Stromeyer, 1986, 1992, the Alps (Kastrup et al, 2004;Reinecker et al, 2010), or for the Mediterranean area (Rebaï et al, 1992 (Müller et al, 1992) to the direction of absolute plate motion from Minster and Jordan (1978).…”

Section: Stress Orientation In Central Europementioning

confidence: 99%

Stress rotation – The impact and interaction of rock stiffness and faults

Reiter¹

2020

Preprint

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Abstract. It has been assumed, that the maximum compressive horizontal stress (SHmax) orientation in the upper crust is governed on a regional scale by the same forces that drive plate motion. However, several regions are identified, where stress orientation deviates from the expected orientation due to plate boundary forces (first order stress sources), or the plate wide pattern. In some of this regions a gradual rotation of the SHmax orientation has been observed. Several second and third order stress sources have been identified, which may explain stress rotation in the upper crust. For example lateral heterogeneities in the crust, such as density, petrophysical or petrothermal properties and discontinuities, like faults are identified as potential candidates to cause lateral stress rotations. To investigate several of the candidates, generic geomechanical numerical models are utilized. These models consist of up to five different units, oriented by an angle of 60° to the direction of contraction. These units have variable elastic material properties, such as Young's modulus, Poisson ratio and density. Furthermore, the units can be separated by contact surfaces that allow them so slide along these faults, depending on a selected coefficient of friction. The model results indicate, that a density contrast or the variation of the Poisson's ratio alone sparsely rotates the horizontal stress orientation (≦ 17°). Conversely, a contrast of the Young's modulus allows significant stress rotations in the order of up to 78°; not only areas in the vicinity of the material transition are affected by that stress rotation. Stress rotation clearly decreases for the same stiffness contrast, when the units are separated by low friction discontinuities (19°). Low friction discontinuities in homogeneous models do not change the stress pattern at all, away from the fault; the stress pattern is nearly identical to a model without any active faults. This indicates that material contrasts are capable of producing significant stress rotation for larger areas in the crust. Active faults that separates such material contrasts have the opposite effect, they rather compensate stress rotations.

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In-situ stress measurements in Southwest Germany

Cited by 28 publications

References 3 publications

Inferring the in situ stress regime in deep sediments: an example from the Bruchsal geothermal site

Inferring the in situ stress regime in deep sediments: an example from the Bruchsal geothermal site

Drift tectonics — The fundamental rhythm of crustal drift and deformation

Stress rotation – The impact and interaction of rock stiffness and faults

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