ZIB

Hits per page

hits 1 - 2 | 2 hits

Sorting

Electronic Resource

Seismological models for mining-induced seismic events (1989)

Kuhnt, W. ; Knoll, P. ; Grosser, H. ; [et al.]

Springer

Pure and applied geophysics 129 (1989), S. 513-521

add to mindlist on the mindlist

Details

ISSN: 1420-9136

Keywords: Mine-induced seismicity ; source models ; barrier/asperity models ; seismic moment ; rockbursts ; damaged area

Source: Springer Online Journal Archives 1860-2000

Topics: Geosciences , Physics

Notes: Abstract One possibility to estimate and to interpret the source parameters of low-stress drop seismic events to use the barrier or the asperity model. These models serve as the description of seismic events in a in which a horizontal room and pillar mining method is used in great depth. An additional macroseismic parameter, the destroyed or damaged area in the mine, allows the estimation of the real static stress drop of mining-induced seismic events. This stress drop, derived from a simplified barrier-or asperity-model, appears to be a constant and a characteristic parameter for a given source region. On this base, a relation between the underground destruction or damages and the seismologically estimated parameters is derived and is used for the classification of the mining-induced seismic events.

Type of Medium: Electronic Resource

URL: http://dx.doi.org/10.1007/BF00874522

Permalink

Library	Location	Call Number	Volume/Issue/Year	Availability

Others were also interested in ...

Paper (German National Licenses)

Fulltext

Electronic Resource

The role of diagenetic carbonate concretions in the preservation of the original sedimentary record (2001)

El Albani, A. ; Vachard, D. ; Kuhnt, W. ; [et al.]

Oxford UK : Blackwell Science Ltd

Sedimentology 48 (2001), S. 0

add to mindlist on the mindlist

Details

ISSN: 1365-3091

Source: Blackwell Publishing Journal Backfiles 1879-2005

Topics: Geosciences

Notes: The Upper Cretaceous organic rich limestones and marls of the Tarfaya basin of southwest Morocco contain numerous calcite concretions, which formed during early diagenesis. Relative textural similarities are observed both in the concretions and in the host sediments. However, the biological content of the concretions is considerably higher than in the host marls and limestones. Evidence for fossil dissolution in the host marls, and the absence of concretions in some fossil-rich zones, suggest that the difference in fossil abundance between the concretions and host rock is a function of dissolution, rather than preferential precipitation in fossil-rich areas. Consequently, the carbonate concretions appear to represent the ‘memory’ of the sediment and allow quantification of the original biological components and are potential tools for estimating the original biological material deposited in the soft sediments.