scholarly journals Distinct crustal structure of the North American Midcontinent Rift from P wave receiver functions

2016 ◽  
Vol 121 (11) ◽  
pp. 8136-8153 ◽  
Author(s):  
Hao Zhang ◽  
Suzan Lee ◽  
Emily Wolin ◽  
Trevor A. Bollmann ◽  
Justin Revenaugh ◽  
...  
Keyword(s):  
Crustal Structure ◽  
North American ◽  
Receiver Functions ◽  
P Wave ◽  
Midcontinent Rift ◽  
The North

DISTINCT CRUSTAL STRUCTURE OF THE NORTH AMERICAN MID-CONTINENT RIFT FROM P WAVE RECEIVER FUNCTIONS 

2016 ◽  
Author(s):  
Suzan van der Lee ◽  
◽  
Hao Zhang ◽  
Emily Wolin ◽  
Trevor Bollmann ◽  
...  
Keyword(s):  
Crustal Structure ◽  
North American ◽  
Receiver Functions ◽  
P Wave ◽  
The North

scholarly journals Seismic Imaging of the North American Midcontinent Rift Using S ‐to‐ P Receiver Functions

2018 ◽  
Vol 123 (9) ◽  
pp. 7791-7805 ◽  
Author(s):  
Ben Chichester ◽  
Catherine Rychert ◽  
Nicholas Harmon ◽  
Suzan Lee ◽  
Andrew Frederiksen ◽  
...  
Keyword(s):  
North American ◽  
Seismic Imaging ◽  
Receiver Functions ◽  
Midcontinent Rift ◽  
The North

Geophysical investigations and crustal structure of the North American Midcontinent Rift system

1992 ◽  
Vol 213 (1-2) ◽  
pp. 17-32 ◽  
Author(s):  
William J. Hinze ◽  
David J. Allen ◽  
Adam J. Fox ◽  
Don Sunwood ◽  
Timothy Woelk ◽  
...  
Keyword(s):  
Crustal Structure ◽  
North American ◽  
Rift System ◽  
Midcontinent Rift ◽  
The North ◽  
Midcontinent Rift System ◽  
Geophysical Investigations

Geophysical investigations and crustal structure of the North American Midcontinent Rift system

1992 ◽  
pp. 17-32 ◽  
Author(s):  
William J. Hinze ◽  
David J. Allen ◽  
Adam J. Fox ◽  
Don Sunwood ◽  
Timothy Woelk ◽  
...  
Keyword(s):  
Crustal Structure ◽  
North American ◽  
Rift System ◽  
Midcontinent Rift ◽  
The North ◽  
Midcontinent Rift System ◽  
Geophysical Investigations

The North American Midcontinent Rift beneath Lake Superior from Glimpce seismic reflection profiling

Tectonics ◽  
1989 ◽  
Vol 8 (2) ◽  
pp. 305-332 ◽  
Author(s):  
W. F. Cannon ◽  
Alan G. Green ◽  
D. R. Hutchinson ◽  
Myung Lee ◽  
Bernd Milkereit ◽  
...  
Keyword(s):  
North American ◽  
Seismic Reflection ◽  
Lake Superior ◽  
Midcontinent Rift ◽  
The North ◽  
Seismic Reflection Profiling

scholarly journals Crustal structure beneath Tierra del Fuego, Argentina, inferred from seismic P-wave receiver functions and ambient noise autocorrelations

2019 ◽  
Vol 751 ◽  
pp. 41-53 ◽  
Author(s):  
Carolina Buffoni ◽  
Martin Schimmel ◽  
Nora Cristina Sabbione ◽  
María Laura Rosa ◽  
Gerardo Connon
Keyword(s):  
Crustal Structure ◽  
Ambient Noise ◽  
Receiver Functions ◽  
Tierra Del Fuego ◽  
P Wave

scholarly journals Southern Chile crustal structure from teleseismic receiver functions: Responses to ridge subduction and terrane assembly of Patagonia

Geosphere ◽  
2019 ◽  
Vol 16 (1) ◽  
pp. 378-391 ◽  
Author(s):  
E.E. Rodriguez ◽  
R.M. Russo
Keyword(s):  
Crustal Structure ◽  
Triple Junction ◽  
Oceanic Lithosphere ◽  
Receiver Functions ◽  
Moho Depth ◽  
The South ◽  
Ridge Subduction ◽  
The North ◽  
Tectonic Processes ◽  
Chile Triple Junction

Abstract Continental crustal structure is the product of those processes that operate typically during a long tectonic history. For the Patagonia composite terrane, these tectonic processes include its early Paleozoic accretion to the South America portion of Gondwana, Triassic rifting of Gondwana, and overriding of Pacific Basin oceanic lithosphere since the Mesozoic. To assess the crustal structure and glean insight into how these tectonic processes affected Patagonia, we combined data from two temporary seismic networks situated inboard of the Chile triple junction, with a combined total of 80 broadband seismic stations. Events suitable for analysis yielded 995 teleseismic receiver functions. We estimated crustal thicknesses using two methods, the H-k stacking method and common conversion point stacking. Crustal thicknesses vary between 30 and 55 km. The South American Moho lies at 28–35 km depth in forearc regions that have experienced ridge subduction, in contrast to crustal thicknesses ranging from 34 to 55 km beneath regions north of the Chile triple junction. Inboard, the prevailing Moho depth of ∼35 km shallows to ∼30 km along an E-W trend between 46.5°S and 47°S; we relate this structure to Paleozoic thrust emplacement of the Proterozoic Deseado Massif terrane above the thicker crust of the North Patagonian/Somún Cura terrane along a major south-dipping fault.

Geochronology of the North American Midcontinent rift in western Lake Superior and implications for its geodynamic evolution

1997 ◽  
Vol 34 (4) ◽  
pp. 476-488 ◽  
Author(s):  
D. W. Davis ◽  
J. C. Green
Keyword(s):  
North American ◽  
Lake Superior ◽  
Flood Basalt ◽  
North American Plate ◽  
Rift System ◽  
Midcontinent Rift ◽  
Subsidence Rate ◽  
The North ◽  
Western Lake ◽  
Midcontinent Rift System

Volcanism in the Midcontinent rift system lasted between 1108 and 1086 Ma. Rates of flood-basalt eruption and subsidence in the western Lake Superior region appear to have been greatest at the beginning of recorded activity (estimated 5 km/Ma subsidence rate at 1108 Ma) and rapidly waned over a period of 1–3 Ma during a magnetically reversed period. The age of the paleomagnetic polarity reversal is now constrained to be between 1105 ± 2 and 1102 ± 2 Ma. A resurgence of intense volcanism began at 1100 ± 2 Ma in the North Shore Volcanic Group and lasted until 1097 ± 2 Ma. This group contains a ca. 7 Ma time gap between magnetically reversed and normal volcanic sequences. A similar disconformity appears to exist in the upper part of the Powder Mill Group. The average subsidence rate during this period was approximately 3.7 km/Ma. Latitude variations measured from paleomagnetism on dated sequences indicate that the North American plate was drifting at a minimum rate of 22 cm/year during the early history of the Midcontinent rift. An abrupt slowdown to approximately 8 cm/year occurred at ca. 1095 Ma. These data support a mantle-plume origin for Midcontinent rift volcanism, with the plume head attached to and drifting with the continental lithosphere. Resurgence of flood-basalt magmatism at 1100 Ma may have been caused by extension of the superheated lithosphere following continental collision within the Grenville Orogen to the east.

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