scholarly journals Controls on the expression of igneous intrusions in seismic reflection data

Geosphere ◽  
2015 ◽  
Vol 11 (4) ◽  
pp. 1024-1041 ◽  
Author(s):  
Craig Magee ◽  
Shivani M. Maharaj ◽  
Thilo Wrona ◽  
Christopher A.-L. Jackson
Keyword(s):  
Seismic Reflection ◽  
Seismic Reflection Data ◽  
Reflection Data ◽  
Igneous Intrusions

scholarly journals Impact of igneous intrusion and associated ground deformation on the stratigraphic record

2021 ◽  
Author(s):  
Emilia Dobb ◽  
Craig Magee ◽  
Chris Jackson ◽  
Bailey Lathrop ◽  
Jonas Kopping
Keyword(s):  
Seismic Reflection ◽  
Ground Deformation ◽  
Sedimentary Sequence ◽  
Igneous Intrusion ◽  
Seismic Reflection Data ◽  
Reflection Data ◽  
Igneous Intrusions ◽  
Stratigraphic Record ◽  
Forced Folding ◽  
Geomorphological Analysis

The geomorphology and sediment systems of volcanic areas can be influenced by uplift (forced folding) related to subsurface migration and accumulation of magma. Seismic geomorphological analysis presents a unique tool to study how surface morphology and subsurface magma dynamics relate, given seismic reflection data can image buried landscapes and underlying intrusions in 3D at resolutions of only a few metres-to-decametres. However, differential compaction of the sedimentary sequence above incompressible igneous intrusions during burial modifies palaeosurface morphology. Here we use 3D seismic reflection data from offshore NW Australia to explore how the stratigraphic record of igneous intrusion and associated ground deformation can be unravelled. We focus on a forced fold that formed in the Early Cretaceous to accommodate intrusion of magma, but which was later amplified by burial-related differential compaction of the host sedimentary sequence. We show how: (1) marine channels and clinoforms may be deflected by syn-depositional intrusion-induced forced folds; and (2) differential compaction can locally change clinoform depth post-deposition, potentially leading to erroneous interpretation of shoreline trajectories. Our results demonstrate seismic geomorphological analysis can help us better understand how magma emplacement translates into ground deformation, and how this shapes the landform of volcanic regions.

scholarly journals 3-D seismic images of an extensive igneous sill in the lower crust

Geology ◽  
2019 ◽  
Vol 47 (8) ◽  
pp. 729-733 ◽  
Author(s):  
T. Wrona ◽  
C. Magee ◽  
H. Fossen ◽  
R.L. Gawthorpe ◽  
R.E. Bell ◽  
...  
Keyword(s):  
North Sea ◽  
Lower Crust ◽  
Seismic Reflection ◽  
Three Dimensional ◽  
Seismic Reflection Data ◽  
Reflection Data ◽  
Igneous Intrusions ◽  
Northern North Sea ◽  
Seismic Images ◽  
East West

Abstract When continents rift, magmatism can produce large volumes of melt that migrate upwards from deep below the Earth’s surface. To understand how magmatism impacts rifting, it is critical to understand how much melt is generated and how it transits the crust. Estimating melt volumes and pathways is difficult, however, particularly in the lower crust where the resolution of geophysical techniques is limited. New broadband seismic reflection data allow us to image the three-dimensional (3-D) geometry of magma crystallized in the lower crust (17.5–22 km depth) of the northern North Sea, in an area previously considered a magma-poor rift. The subhorizontal igneous sill is ∼97 km long (north-south), ∼62 km wide (east-west), and 180 ± 40 m thick. We estimate that 472 ± 161 km3 of magma was emplaced within this intrusion, suggesting that the northern North Sea contains a higher volume of igneous intrusions than previously thought. The significant areal extent of the intrusion (∼2700 km2), as well as the presence of intrusive steps, indicate that sills can facilitate widespread lateral magma transport in the lower crust.

The style of transverse faulting in the Dead Sea basin from seismic reflection data: The Amazyahu fault

2006 ◽  
Vol 55 (3) ◽  
pp. 129-139 ◽  
Author(s):  
Avihu Ginzburg ◽  
Moshe Reshef ◽  
Zvi Ben-Avraham ◽  
Uri Schattner
Keyword(s):  
Seismic Reflection ◽  
Dead Sea ◽  
Seismic Reflection Data ◽  
Reflection Data ◽  
Dead Sea Basin ◽  
The Dead

Archive of digital boomer seismic reflection data collected offshore east-central Florida during USGS cruise 00FGS01, July 14-22, 2000

Data Series ◽  
10.3133/ds496 ◽  
2009 ◽  
Author(s):  
Janice A. Subino ◽  
Shawn V. Dadisman ◽  
Dana S. Wiese ◽  
Karynna Calderon ◽  
Daniel C. Phelps
Keyword(s):  
Seismic Reflection ◽  
Seismic Reflection Data ◽  
East Central ◽  
Central Florida ◽  
Reflection Data

Archive of digital CHIRP seismic reflection data collected during USGS cruise 06SCC01 offshore of Isles Dernieres, Louisiana, June 2006

Data Series ◽  
10.3133/ds259 ◽  
2007 ◽  
Author(s):  
Arnell S. Harrison ◽  
Shawn V. Dadisman ◽  
Nick F. Ferina ◽  
Dana S. Wiese ◽  
James G. Flocks
Keyword(s):  
Seismic Reflection ◽  
Seismic Reflection Data ◽  
Reflection Data

Archive of digital boomer and CHIRP seismic reflection data collected during USGS cruise 06FSH03 offshore of Fort Lauderdale, Florida, September 2006

Data Series ◽  
10.3133/ds308 ◽  
2007 ◽  
Author(s):  
Arnell S. Harrison ◽  
Shawn V. Dadisman ◽  
Christopher D. Reich ◽  
Dana S. Wiese ◽  
Jason W. Greenwood ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Seismic Reflection Data ◽  
Fort Lauderdale ◽  
Reflection Data

Archive of Digital Boomer Seismic Reflection Data Collected During USGS Field Activities 93LCA01 and 94LCA01 in Kingsley, Orange, and Lowry Lakes, Northeast Florida, 1993 and 1994

Data Series ◽  
10.3133/ds100 ◽  
2004 ◽  
Author(s):  
Karynna Calderon ◽  
Shawn V. Dadisman ◽  
Jack G. Kindinger ◽  
Jeffrey B. Davis ◽  
James G. Flocks ◽  
...  
Keyword(s):  
Seismic Reflection ◽  
Seismic Reflection Data ◽  
Reflection Data
Sign in / Sign up

Export Citation Format

Share Document