scholarly journals Fault interactions and reactivation within a normal-fault network at Milne Point, Alaska

AAPG Bulletin ◽  
2014 ◽  
Vol 98 (10) ◽  
pp. 2081-2107 ◽  
Author(s):  
Casey W. Nixon ◽  
David J. Sanderson ◽  
Stephen J. Dee ◽  
Jonathan M. Bull ◽  
Robert J. Humphreys ◽  
...  
Keyword(s):  
Normal Fault ◽  
Fault Interactions ◽  
Fault Network

Caracteres structuraux et dynamiques d'un bassin en transtension; la plate-forme tunisienne a l'Ypresien terminal

2000 ◽  
Vol 171 (5) ◽  
pp. 559-568 ◽  
Author(s):  
Claude Gourmelen ◽  
Adel Rigane ◽  
Paul Broquet ◽  
Rene Truillet ◽  
Mohamed Ouramdane Aite
Keyword(s):  
Normal Fault ◽  
Strike Slip ◽  
Tectonic Event ◽  
Field Orientation ◽  
Kinematic Study ◽  
Dynamic Stress Field ◽  
Deformation Features ◽  
Nummulitic Limestone ◽  
Fault Network ◽  
Late Ypresian

Abstract In Tunisia, Ypresian carbonate deposits occur on a platform preserving vestige of an inherited fault network. The fault network delineates blocks of different sizes accounting for the platform morphology and in turn for variation in thickness of the Ypresian sequence. The nummulitic limestone carapace of the Ypresian sequence is fractured by faults and joints of various orientations which are systematically sealed by marly beds of early Lutetian age. This indicates that the fault network was reactivated during late Ypresian. Geometric and kinematic study indicates that this strike slip late reactivation is accomodated by normal fault. These structures originated in soft sediment undergoing diagenesis. Depending on bed competency, both ductile and brittle deformation features were recognized in the fault. This superficial tectonic event represents, a recent reactivation of ancient fractures cartographically located on the boundaries of late Ypresian megablocks. Kinematic study of the deformation within and along the boundaries of one of these blocks, (Ousseltia block), indicates a late Ypresian, early Lutetian strike-slip distensive faulting dynamic. Stress-field orientation indicates a rapid re-orientation in time from a predominantly NW-SE extensional tectonic to a NE-SW extensional event. Stratigraphic dating of that tectonical crisis coincides with a turbulent period of relative motions between Europe and Africa.

Structural Complexity and Mechanics of a shallow crustal Seismogenic Source (Vado di Corno Fault Zone, Italy)

2020 ◽  
Author(s):  
Michele Fondriest ◽  
Fabrizio Balsamo ◽  
Andrea Bistacchi ◽  
Luca Clemenzi ◽  
Matteo Demurtas ◽  
...  
Keyword(s):  
Internal Structure ◽  
Fault Zone ◽  
Normal Fault ◽  
Spatial Arrangement ◽  
Early Pleistocene ◽  
Central Apennines ◽  
Network Modelling ◽  
Seismogenic Source ◽  
Thrust Zone ◽  
Fault Network

<p>The mechanics and seismogenic behaviour of fault zones are strongly influenced by their internal structure, intended as three-dimensional geometry and topology of the fault/fracture network and distribution of the fault zone rocks with related physical properties.  In this perspective, the internal structure of the extensional seismically active Vado di Corno Fault Zone (Central Apennines, Italy) was quantified by combining high-resolution structural mapping with modern techniques of 3D fault network modelling over ∼2 km along fault strike. The fault zone is hosted in carbonate host rocks, was exhumed from ∼2 km depth, accommodated a normal slip of ∼1.5-2 km since Early-Pleistocene and cuts through the Pliocene Omo Morto Thrust Zone that was partially reactivated in extension.</p><p>The exceptional exposure of the Vado di Corno Fault Zone footwall block allowed us to reconstruct with extreme detail the geometry of the older Omo Morto Thrust Zone and quantify the spatial arrangement of master and subsidiary faults, and fault zone rocks within the Vado di Corno Fault Zone. The combined analysis of the structural map and of a realistic 3D fault network model with kinematic, topological and slip tendency analyses, pointed out the crucial role of the older Omo Morto Thrust Zone geometry (i.e. the occurrence and position of lateral ramps) in controlling the along-strike segmentation and slip distribution of the active Vado di Corno normal fault zone. These findings were tested with a boundary element mechanical model that highlights the effect of inherited compressional features on the Vado di Corno Fault Zone internal structure and returns distributions and particularly partitioning of slip comparable with those measured in the field.</p><p>Lastly, we discuss the exhumed Vado di Corno Fault Zone as an analogue for the shallow structure of many seismic sources in the Central Apennines. The mechanical interaction of the inherited Omo Morto Thrust Zone and the extensional Vado di Corno Fault Zone generated along-strike and down-dip geometrical asperities. Similar settings could play first-order control on the complex spatio-temporal evolution and rupture heterogeneity of earthquakes in the region (e.g. 2009 Mw 6.1 L’Aquila earthquake).</p>

Normal fault interactions, paleoearthquakes and growth in an active rift

2010 ◽  
Vol 32 (8) ◽  
pp. 1101-1113 ◽  
Author(s):  
A. Nicol ◽  
J.J. Walsh ◽  
P. Villamor ◽  
H. Seebeck ◽  
K.R. Berryman
Keyword(s):  
Normal Fault ◽  
Fault Interactions

Millennial to million year normal-fault interactions in the forearc of a subduction margin, Crete, Greece

2018 ◽  
Vol 113 ◽  
pp. 225-241 ◽  
Author(s):  
Violeta Veliz ◽  
Vasiliki Mouslopoulou ◽  
Andrew Nicol ◽  
Charalampos Fassoulas ◽  
John Begg ◽  
...  
Keyword(s):  
Normal Fault ◽  
Fault Interactions

THE EVOLUTION OF SUBSIDIARY FRACTURE NETWORKS IN SEGMENTED NORMAL FAULT SYSTEMS

2016 ◽  
Author(s):  
Samuel O. Simoneau ◽  
◽  
Benjamin Surpless ◽  
Hannah Mathy
Keyword(s):  
Normal Fault ◽  
Fracture Networks ◽  
Fault Systems

HIGH RESOLUTION CARBONATE RECORDS OF FLUID-FAULT-INTERACTIONS AT THE GREEN RIVER CO2 NATURAL ANALOGUE

2016 ◽  
Author(s):  
Peter M. Scott ◽  
◽  
Alex Maskell ◽  
Alex Maskell ◽  
Aleksey Sadekov ◽  
...  
Keyword(s):  
High Resolution ◽  
Natural Analogue ◽  
Green River ◽  
Fault Interactions
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