Pre-Tertiary and Tertiary fault systems as a framework of the South Sumatra Basin; a study of SAR-maps

2018 ◽  
Author(s):  
A. Pulunggono
Keyword(s):  
The South ◽  
Fault Systems

scholarly journals Seismic imaging across fault systems in the Abitibi greenstone belt – An analysis of pre- and post-stack migration approaches in the Chibougamau area, Quebec, Canada

2020 ◽  
Author(s):  
Saeid Cheraghi ◽  
Alireza Malehmir ◽  
Mostafa Naghizadeh ◽  
David Snyder ◽  
Lucie Mathieu ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Seismic Imaging ◽  
Massive Sulfide ◽  
Geological Structure ◽  
The South ◽  
Element Analysis ◽  
Fault Systems ◽  
The North ◽  
Relative Contribution ◽  
Abitibi Subprovince

Abstract. Two high-resolution seismic reflection profiles acquired north and south of Chibougamau, located in the northeast of the Abitibi subprovince of Canada help understand historic volcanic-hosted massive sulfide (VMS) deposits and hydrothermal Cu-Au mineralization found there. Major faults crossed by the profiles include the Barlow fault in the north and the Doda fault and the Guercheville fault in the south, all targets of this study that seeks to determine spatial relationships with known metal endowment in the area. Common-offset DMO corrections and common-offset pre-stack time migrations (PSTM) were considered. Irregularities of the trace midpoint distribution resulting from the crooked geometry of both profiles and their relative contribution to DMO and PSTM method and seismic illumination were assessed in the context of the complex subsurface architecture of the area. To scrutinize this contribution, seismic images were generated for offset ranges of 0–9 km using increments of 3 km. Migration of out-of-plane reflections used cross-dip element analysis to accurately estimate the fault dip. The seismic imaging shows the thickening of the upper crustal rocks near the fault zones along both profiles. In the north seismic reflection section, key geological structure identified include the Barlow fault and two diffraction sets imaged within the fault zone that represent potential targets for future exploration. The south seismic reflection section shows rather a complicated geometry of two fault systems. The Guercheville fault observed as a subhorizontal reflector connects to a steeply dipping reflector. The Doda fault dips subvertical in the shallow crust but as a steeply dipping reflection set at depth. Nearby gold showings suggest that these faults may help channel and concentrate mineralizing fluids.

scholarly journals Seismic imaging across fault systems in the Abitibi greenstone belt – an analysis of pre- and post-stack migration approaches in the Chibougamau area, Quebec, Canada

Solid Earth ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 1143-1164
Author(s):  
Saeid Cheraghi ◽  
Alireza Malehmir ◽  
Mostafa Naghizadeh ◽  
David Snyder ◽  
Lucie Mathieu ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Seismic Imaging ◽  
Massive Sulfide ◽  
The South ◽  
Element Analysis ◽  
Fault Systems ◽  
The North ◽  
Relative Contribution ◽  
Abitibi Subprovince ◽  
Seismic Reflection Profiles

Abstract. Two high-resolution seismic reflection profiles acquired north and south of Chibougamau, located in the northeast of the Abitibi subprovince of Canada, help understand historic volcanically hosted massive sulfide (VMS) deposits and hydrothermal Cu–Au mineralization found there. Major faults crossed by the profiles include the Barlow fault in the north and the Doda fault and the Guercheville fault in the south, all targets of this study that seeks to determine spatial relationships with a known metal endowment in the area. Common-offset DMO corrections and common-offset pre-stack time migrations (PSTMs) were considered. Irregularities of the trace midpoint distribution resulting from the crooked geometry of both profiles and their relative contribution to the DMO and PSTM methods and seismic illumination were assessed in the context of the complex subsurface architecture of the area. To scrutinize this contribution, seismic images were generated for offset ranges of 0–9 km using increments of 3 km. Migration of out-of-plane reflections used cross-dip element analysis to accurately estimate the fault dip. The seismic imaging shows the thickening of the upper-crustal rocks near the fault zones along both profiles. In the northern seismic reflection section, the key geological structures identified include the Barlow fault and two diffraction sets imaged within the fault zone that represent potential targets for future exploration. The south seismic reflection section shows rather a complicated geometry of two fault systems. The Guercheville fault observed as a subhorizontal reflector connects to a steeply dipping reflector. The Doda fault dips subvertical in the shallow crust but as a steeply dipping reflection set at depth. Nearby gold showings suggest that these faults may help channel and concentrate mineralizing fluids.

The Stability of Fault Systems in the South Shore of the St. Lawrence Lowlands of Quebec: Implications for Shale Gas Development

2011 ◽  
Author(s):  
John Brodylo ◽  
Jean-Yves Desire Chatellier ◽  
Guillaume Matton ◽  
Michel Rheault
Keyword(s):  
Shale Gas ◽  
The South ◽  
Fault Systems ◽  
South Shore ◽  
The Stability

Presidential Republicanism in the South, 1960

1962 ◽  
Vol 24 (2) ◽  
pp. 303-322 ◽  
Author(s):  
Bernard Cosman
Keyword(s):  
The South

Long-term Cyclic Variations of Prominences, Green and Red Coronae over Solar Cycles

2000 ◽  
Vol 179 ◽  
pp. 201-204
Author(s):  
Vojtech Rušin ◽  
Milan Minarovjech ◽  
Milan Rybanský
Keyword(s):  
Emission Lines ◽  
High Latitudes ◽  
Green Line ◽  
Solar Cycles ◽  
The South ◽  
Coronal Emission ◽  
Local Maxima ◽  
The North ◽  
Cyclic Variations

AbstractLong-term cyclic variations in the distribution of prominences and intensities of green (530.3 nm) and red (637.4 nm) coronal emission lines over solar cycles 18–23 are presented. Polar prominence branches will reach the poles at different epochs in cycle 23: the north branch at the beginning in 2002 and the south branch a year later (2003), respectively. The local maxima of intensities in the green line show both poleward- and equatorward-migrating branches. The poleward branches will reach the poles around cycle maxima like prominences, while the equatorward branches show a duration of 18 years and will end in cycle minima (2007). The red corona shows mostly equatorward branches. The possibility that these branches begin to develop at high latitudes in the preceding cycles cannot be excluded.

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