INVERSION TECTONICS Wessex basin.

Slides:

Advertisements

Similar presentations

Structural Analysis Lecture 10 SLIDE 1

Advertisements

FAULTS AND FAULTING Dr. Masdouq Al-Taj

Geology of Idaho The Northern Rockies. Northern Rockies Basin & Range Middle Rockies The 3 mountainous regions of Idaho.

4. Formation and Deformation of the Continental Crust

Northern Resources Development Margot McMechan Earth Sciences Sector Northern Resources Development Transverse Structure and Tectonic.

Normal or Reverse? Looking at the two types of vertical displacement in dip-slip faults using the hanging wall method.

GEOLOGIC STRUCTURES “Architecture of bedrock” Structural Geology- –shapes, –arrangement, –interrelationships of bedrock –units & forces that cause them.

Geologic Maps Geology 100 Geology for Environmental Scientists.

Geologic Structures Structural Geology – study of deformation of rocks and the forces that cause deformation.

Active Folding within the L.A. Basin with a focus on: Argus et al. (2005), Interseismic strain accumulation and anthropogenic motion in metropolitan Los.

The Role of Preexisting Basement Structures During Continental Collision: Insights from Analog “Sandbox” Modeling By Caroline Fernandez, Kathryn Boardman,

Preexisting faults and faults that should not exist: Effects of mechanical anisotropy on different scales? Jonas Kley 1 Alexander Malz 2 1 Geoscience Center.

II. Basic Techniques in Structural Geology Field measurements and mapping Terminology on faults and folds Stereographic projections From maps to cross-sections.

Sevier- and Laramide-Style Tectonics in the Northern Rocky Mountains John S. Oldow Geological Sciences University of Idaho Moscow, Idaho.

The Structural and Geodynamic Evolution of the Black Sea Basin Stuart Egan & David Meredith The Structural and Geodynamic Evolution of the Black Sea Basin.

Regional geology and tectonic history of Wyoming Geological Field Techniques Course.

Normal faults -rifted continental margins -form in extension -typical for continental and oceanic lithosphere -jargon (horsts, grabens, listric, detachment)

Announcements 1.Reminder, this Saturday field trip. Meeting place/time: GS loading dock at 7:45 am. Bring hiking gear, lunches, water. 2.Extra credit:

Announcements: Final Exam Monday, Dec. 16, 11-1 this room.

Announcements Field trip this Saturday to Cottonwood Canyon area 7:30 AM at loading dock. We will map some really cool stuff! Please review map symbols.

Discrepencies Different researchers use different cut-off points for what we term low-angle faults. We will go with the text definition of dips

Types of Metamorphism Regional metamorphism

Integrated 2-D and 3-D Structural, Thermal, Rheological and Isostatic Modelling of Lithosphere Deformation: Application to Deep Intra- Continental Basins.

Mountain Building Using a sandbox to Model mountain building and Faults Using a sandbox to Model mountain building and Faults.

EARS 5131 STUCTURE AND HYDROCARBON PROSPECTIVITY OF BASIN.

Faults and Folds Reference: Tarbuck and Lutgens Pages

Harry Williams, Geomorphology1 Diastrophism - Folded, Faulted and Tilted Strata. Introduction Three types of deformation result from subjecting rock to.

Folds Rocks are often bent into a series of wave-like undulations called folds Characteristics of folds Folds result from compressional stresses which.

1 THRUST FAULTS: ASSOCIATED STRUCTURES AND IMPLICATIONS IN HYDROCARBONS TRAPS James Moore Alex Nyombi Christian Hidalgo Adekunle Odutola STRUCTURE AND.

Reading Displacement chapter, in library (not available online). Read plus Concept map due Wednesday. Davis and Reynolds “ Structural.

Crustal Deformation Structural Geology

Faults, Folds, and Landscapes

Tectonic deformation and geologic structures. Mountain building Anatomy of a convergent mountain belt Valley & ridge Blue ridge.

What are these?. What is this part of the cell called?

GEO-4840 TECTONICS-S05 PART 1: LECTURES [ Wed (16) ] 19/1 - 09/3 PART 2: STUDENT PROJECTS [ Presentations ] 13/4 PART 3: FIELD TEACHING [ Corsica.

Mountain Building - Orogenesis. Archimedes’ principle Fig –The mass of the water displaced by the block of material equals the mass of the whole.

Other Tectonic Rifts: the Woodlark-D'Entrecasteaux Rift, Papua New Guinea Geoffrey Abers, Boston University Thanks to: A. Ferris (BU), S. Baldwin (Syracuse),

Testing models – Structural restoration. Ben Peach’s field notebook: 1880s. Line-length balancing Area balancing.

What is a “tectonic analog”?  (1) Mmax implies large L, W.  Most SCRs are best examined with regional geologic and tectonic maps (1:2,500,000 – 1:10,000,000.

GLG310 Structural Geology. 24 February 2016GLG310 Structural Geology Description of faults NormalThrust/reverseStrike-slip Horizontal stretch >11 in.

TIMANIAN OROGENY AND LATE NEOPROTEROZOIC SUBDUCTION V. PEASE, STOCKHOLM UNIVERSITY.

structural geology & mountain building

Velocity and Attenuation in the Eastern Bay Area and the Delta Donna Eberhart-Phillips UC Davis USGS Delta workshop 10 Sept 2015.

II. Methods in Morphotectonics 1- Identification of Active Faults 2 Determination of slip-rate on strike-slip faults 3- Determination of fold growth and.

Forces In Mountain Building

Chapter 7 Dynamic Earth Eric H Christiansen

Folds, Faults & Geologic Maps

Lecture 1: Introduction

Folds and Faults.

Images courtesy of Google Earth (top), and USGS (bottom).

Forces In Mountain Building

Mountain Building “Tectonic Forces at Work”

Haneen Ghafoor 5th hour Tectonic Plates Haneen Ghafoor 5th hour

Deforming the Earth’s Crust: Faulting

Fold Thrust Belts.

LA Basin Story Tectonics Geology Faults Velocity Structure Seismicity

Finding fault(s) How to evaluate whether a fault is present in the subsurface or an area of poor exposure.

Deforming the Earth’s Crust: Faulting

Harry Williams, Geomorphology

11.2 – Types of Mountains.

Basin evolution and destruction in an Early Proterozoic continental margin: the Rinkian fold–thrust belt of central West Greenland by John Grocott, and.

Seismic expression relay ramps in the Taranaki Basin, New Zealand

Geologic Maps Lecture 38.

The Structural and Geodynamic Evolution of the Black Sea Basin

MOUNTAIN BUILDING AND EVOLUTION OF CONTINENTS

Geometry and key elements of the Central Andaman Basin and East Andaman Basin. Geometry and key elements of the Central Andaman Basin and East Andaman.

Geological Society, London, Memoirs

Schematic cross-section from the eastern Alcock Rise across the East Andaman Basin, SE offshore Myanmar. Schematic cross-section from the eastern Alcock.

Presentation transcript:

INVERSION TECTONICS Wessex basin

“regional” null-points footwall short-cuts buttressing Inversion in mountain belts

“Regional” …the continuous level/orientation of a horizon through the region (away from the fault structure)

“Regional” for green horizon

For ideal contractional structures… all parts of the structure move to ABOVE their regional….. For ideal extensional structures…… all parts move to BELOW their regional.

Net contraction Null point Net extension

Footwall short-cut

Beware vertical exag

Inversion or fault-bend fold?

Why structural style matters for regional orogenic studies

Inheritance in the Apennines? Inversion in the Adriatic Argnani & Gamberi 1997

Ultra-reactivation model. Basement-involved, low displacements Eastern part of CROP-03 Ultra-reactivation model. Basement-involved, low displacements (8.5 km vs 22 km) Butler et al. 2004

Basement involved – but not simply fault reactivation (like Vercors) Scisciani et al. 2002 (J. Struct Geol)

pre-existing normal fault Thrust nucleates on pre-existing normal fault Richard Morgan Deep water Nigeria

More information? Geological Society (London) Spec Publs: Inversion Tectonics (44) Basin Inversion (88)