announcements cottonwood exercise and homework are due on thursday the project for those who missed...
TRANSCRIPT
![Page 1: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/1.jpg)
Announcements
Cottonwood exercise and homework are due on Thursday
The project for those who missed the field trip is now available online- deadline for that is Tuesday March 25, in class (no extensions!,
zero credit after deadline)
![Page 2: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/2.jpg)
![Page 3: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/3.jpg)
Cottonwood trip- a few thoughts
![Page 4: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/4.jpg)
Changes in dips? How can you explain them?
![Page 5: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/5.jpg)
Definitely a fault; what kind?
![Page 6: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/6.jpg)
![Page 7: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/7.jpg)
Need to think about cross- section
![Page 8: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/8.jpg)
Strike-slip fault systems(D&R: 357-371)
1. Tectonic settings and significance
2. Geometries
3. Active strike-slip faults-
4. mineralization + petroleum
![Page 9: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/9.jpg)
At the scale of plate tectonics, transform (strike-slip) plate boundaries are subordinate to convergent and divergent plate margins- but they play a critical role
![Page 10: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/10.jpg)
oceanic (ridge-ridge) transform faults, revisited
![Page 11: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/11.jpg)
Continental strike-slip faults- the San Andreas
![Page 12: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/12.jpg)
![Page 13: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/13.jpg)
![Page 14: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/14.jpg)
How deep should earthquakes be within an active strike-slip fault?
Down to the brittle-ductile transition
![Page 15: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/15.jpg)
The Alpine fault in New Zealand transfers slip
between two subduction zones (trench-trench
transform)
![Page 16: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/16.jpg)
The North Anatolian fault-rupture near Izmitlast September.
![Page 17: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/17.jpg)
Major active continental strike-slip faults in Asia
![Page 18: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/18.jpg)
tectonic extrusion or escape hypothesis
![Page 19: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/19.jpg)
Strike-slip faults can transfer slip between different thrust or extensional systems
![Page 20: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/20.jpg)
Strain can be partitioned into different styles of fault systems-
![Page 21: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/21.jpg)
Strain partitioning in oblique convergent margin settings
![Page 22: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/22.jpg)
Fault traces are rarely straight- they can curve, branch, or be arranged en echelon.
This leads to a wide variety of strike-slip related deformation
![Page 23: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/23.jpg)
Transtension in releasing bends may lead to development of sag ponds and pull-apart basins
![Page 24: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/24.jpg)
Restraining bends and transpressional deformation- folds and thrusts
![Page 25: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/25.jpg)
The San Andreas bend near Los Angeles:thrusting related to strike-slip faulting
![Page 26: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/26.jpg)
Many strike-slip fault systems are characterized by faults that converge downward and form flower structures
compressional setting: "positive" or "palm tree" flower structure
extensional setting: "negative" or "tulip" flower structure
![Page 27: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/27.jpg)
Some flower structures look like duplexes turned on their side- strike-slip duplexes
![Page 28: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/28.jpg)
![Page 29: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/29.jpg)
Riedel shears- especially common in strike-slip fault systems
R: synthetic Riedel shearR': antithetic Riedel shearP: synthetic shear, subordinate to R and R' or absent
![Page 30: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/30.jpg)
summary ofstrike-slip-relateddeformation
![Page 31: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/31.jpg)
What is important about strike-slip faults and why do we care?
1. Many active strike-slip faults are associated with high slip rates, major earthquakes, and lithospheric plate boundaries
2. Oil and mineral exploration.
![Page 32: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/32.jpg)
![Page 33: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/33.jpg)
![Page 34: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/34.jpg)
Significance of strike-slip fault systems for oil
![Page 35: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/35.jpg)
Many Archean and Phanerozoic mineral deposits (especially gold) are associated with zones of strike-slip deformation
![Page 36: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/36.jpg)
![Page 37: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/37.jpg)
![Page 38: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/38.jpg)
![Page 39: Announcements Cottonwood exercise and homework are due on Thursday The project for those who missed the field trip is now available online- deadline for](https://reader037.vdocuments.mx/reader037/viewer/2022103022/56649cb75503460f9497cc36/html5/thumbnails/39.jpg)
Important terminology/conceptsridge-ridge and trench-trench transform faults
concept of continental extrusion or escape
strike-slip faults as transfer faults
strain partitioning
oblique convergence
releasing vs. restraining bend
transpression vs. transtension
sag ponds and pull-apart basins
flower structures
strike-slip duplexes
right-stepping vs. left-stepping fault arrays
folds in strike-slip zones
Riedel shears