Seismic detection of an active subglacial magmatic complex in Marie Byrd Land, Antarctica

2013 ◽  
Vol 6 (12) ◽  
pp. 1031-1035 ◽  
Author(s):  
Amanda C. Lough ◽  
Douglas A. Wiens ◽  
C. Grace Barcheck ◽  
Sridhar Anandakrishnan ◽  
Richard C. Aster ◽  
...  
Keyword(s):  
Magmatic Complex ◽  
Seismic Detection

Porphyry Cu–Au mineralization in the Mirkuh Ali Mirza magmatic complex, NW Iran

2014 ◽  
Vol 79 ◽  
pp. 932-941 ◽  
Author(s):  
A. Maghsoudi ◽  
M. Yazdi ◽  
M. Mehrpartou ◽  
M. Vosoughi ◽  
S. Younesi
Keyword(s):  
Magmatic Complex ◽  
Nw Iran ◽  
Porphyry Cu

Study on Seismic Detection Applied in Mine Advance and Side

2014 ◽  
Vol 580-583 ◽  
pp. 1649-1652
Author(s):  
Yun Bing Hu ◽  
Yao Wang ◽  
Yan Qing Wu ◽  
Zi Xuan Liu
Keyword(s):  
Seismic Data ◽  
Mine Field ◽  
Qinshui Basin ◽  
Radon Transformation ◽  
Hazard Detection ◽  
Seismic Detection

This paper mainly discusses that the tunnel seismic advance detection is applied in mine geo-hazard detection. Separating the field seismic data of mine by radon transformation and migrating the data through advance way and side way, we accomplished advance and side detection simultaneously by one-time shot seismic data. Case study was carried on at Qinshui basin Yangmei No.5 mine field, and detection results mainly coincide with out-crops, demonstrating that our method can be one reference in mine geo-hazard detection.

Seismic detection of a sinkhole using spectral-based analysis

2014 ◽  
Author(s):  
Valeri Korneev* ◽  
Roland Gritto ◽  
Magomed Magomedov ◽  
Michael Zuev ◽  
Elnaiem A. Elobaid ◽  
...  
Keyword(s):  
Seismic Detection

Seismic Wave Simulation in Fractured Media

2021 ◽  
Author(s):  
Houzhu Zhang ◽  
Jiaxuan Li ◽  
Abdulmohsen Ali
Keyword(s):  
Wave Propagation ◽  
Fractured Reservoirs ◽  
Forward Modeling ◽  
Source Rocks ◽  
Reservoir Performance ◽  
Amplitude Versus Offset ◽  
Seismic Detection ◽  
Potential Applications ◽  
Subsurface Fractures ◽  
Global Energy Supply

Abstract Fractured reservoirs, including unconventional fields, are important in global energy supply, particularly for carbonate source rocks. Fractures can influence subsurface fluid flow and the stress state of a reservoir. The knowledge about the existence of fractures, their spatial distributions, and orientations can help us optimize well productivity and reservoir performance. Seismic detection of subsurface fractures provides important measurements to remotely image field-scale fractures. In developing such technology, forward modeling of the seismic response from fractures in the reservoir provides an important alternate tool for imaging subsurface fractures. In this paper, we implement a seismic modeling algorithm which can simulate 3D wave propagation in an arbitrary background media with imbedded fractures. During modeling, the fractures are added to the background medium by linear slip theory. Examples demonstrated the impacts of fractures on the wave propagation patterns for both PP and PS waves. We also investigate the amplitude versus offset (AVO) effects caused by fractures in a layer media and lay out potential applications of forward modeling in the inversion of fracture parameters and the estimation of fluid contents.

Numerical simulation of the Late Jurassic closure of the Vardar Tethys

2021 ◽  
Author(s):  
Nikola Stanković ◽  
Vesna Cvetkov ◽  
Vladica Cvetković
Keyword(s):  
Boundary Conditions ◽  
Numerical Simulations ◽  
Stokes Equations ◽  
Numerical Study ◽  
Phase Evolution ◽  
Staggered Grid ◽  
Second Phase ◽  
Weak Zone ◽  
Ongoing Research ◽  
Magmatic Complex

<p>We report updated results of our ongoing research on constraining geodynamic conditions associated with the final closure of the Vardar branch of the Tethys Ocean by means of application of numerical simulations (previous interim results reported in EGU2020-5919).</p><p>The aim of our numerical study is to test the hypothesis that a single eastward subduction in the Jurassic is a valid explanation for the occurrence of three major, presently observed geological entities that are left behind after the closure of the Vardar Tethys. These include: ophiolite-like igneous rocks of the Sava-Vardar zone and presumably subduction related Timok Magmatic Complex, both Late Cretaceous in age as well as Jurassic ophiolites obducted onto the Adriatic margin. In our simulations we initiate an intraoceanic subduction in the Early/Middle Jurassic, which eventually transitions into an oceanic closure and subsequent continental collision processes.</p><p>In the scope of our study numerical simulations are performed by solving a set of partial differential equations: the continuity equation, the Navier-Stokes equations and the temperature equation. To this end we used I2VIS thermo-mechanical code which utilizes marker in cell approach with finite difference discretization of equations on a staggered grid [Gerya et al., 2000; Gerya&Yuen, 2003].</p><p>The 2D model consists of two continental plates separated by two oceanic slabs connected at a mid-oceanic ridge. Intraoceanic subduction is initiated along the ridge by assigning a weak zone beneath the ridge. Time-dependent boundary conditions for velocity are imposed on the simulation in order to model a transient spreading period. The change of sign in plate velocities is found to be useful for both obtaining obduction / ophiolite emplacement [Duretz et al., 2016] and causing back-arc extension. Changes in velocities are linear in time. Simulations follow a three-phase evolution of velocity boundary conditions consisting of two convergent phases separated by a single divergent phase where spreading regime is dominant. Effect of duration and magnitude of the second phase on model evolution is also explored.</p><p>Our so far obtained simulations were able to reproduce the westward obduction and certain extension processes along the active (European) margin, which match the existing geological relationships. However, the simulations involve an unreasonably short geodynamic event (cca 15-20 My) and we are working on solving this problem with new simulations. </p>

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