Lab_13_2011 - GG303 Lab 13 11/17/11 1 FAULT SLIP Lab 13...

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GG303 Lab 13 11/17/11 1 Stephen Martel Lab13-1 University of Hawaii FAULT SLIP Lab 13 Problem 1 (32 pts total) In the attached map for problem 1, a dike shows a left-lateral separation of 100m. The mapped surface has been eroded perfectly flat. Consider the four cases below: Case 1 The marker unit is vertical Case 2 The marker unit dips 20° to the east and the fault is a pure dip-slip fault. Case 3 The marker unit dips 20° to the west and the fault is a pure dip-slip fault. Case 4 The marker unit dips 45° to the west and the vertical component of slip in 200 m. You will attempt to find the slip for each case.
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GG303 Lab 13 11/17/11 2 Stephen Martel Lab13-2 University of Hawaii Questions For each of the four cases, evaluate the slip. A What is the sense of slip? Dip-slip (north side up)? Dip-slip (south side up)? Left-lateral strike-slip? Right-lateral strike-slip? Oblique-slip? If the sense of slip can not be determined uniquely, state the possible options. Be as specific as you can. B What are the horizontal, vertical and net components of slip (in meters)? If you can only give a minimum or a maximum figure, give that. If the amount of slip cannot be determined, state that. C What would you expect for the trend and plunge of the slip vector? If the orientation of the slip vector cannot be determined, state that. Question A Question B Question C Case 1 2pts Horizontal_____1 Vertical_______1 Net__________1 Slip vector trend:_______________ 1 Slip vector plunge:______________ 1 Case 2 2pts Horizontal_____1 Vertical_______1 Net__________1 Slip vector trend:_______________ 1 Slip vector plunge:______________ 1 Case 3 2pts Horizontal_____1 Vertical_______1 Net__________1 Slip vector trend:______________ 1 Slip vector plunge:______________ 1 Case 4 2pts Horizontal_____1 Vertical______1 Net__________1 Slip vector trend:______________ 1 Slip vector plunge:______________ 1 It might help to draw a cross section along the plane of the fault for each case. For example, for case 1 the cross section would look like so: 100 m Marker on north side of fault Marker on south side of fault W E
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GG303 Lab 13 11/17/11 3 Stephen Martel Lab13-3 University of Hawaii Problem 2 (32 pts total) Review the example below before attempting problem 2. In the example map and cross section below, two intersecting dikes of equal age are offset. They can be used together to find the slip across the fault. The dikes on each side of the fault can be considered to intersect in a line. The line on the north side of the fault intersects the fault to give one piercing point (P N ), and the line on the south side of the fault intersects the fault to give another piercing point (P S ). The vector connecting the two piercing points gives the slip. The slip vector can be found both graphically and algebraically. NOTE:
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This note was uploaded on 12/05/2011 for the course GEOLOGY 300 taught by Professor Stephenmartel during the Fall '11 term at University of Hawaii, Manoa.

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Lab_13_2011 - GG303 Lab 13 11/17/11 1 FAULT SLIP Lab 13...

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