Fault surfaces sometimes contain overprinted slip lineations (fault striae). Suc

Question

Fault surfaces sometimes contain overprinted slip lineations (fault striae). Such slip lineations can be used to determine the orientation of slip on a fault, and. therefore, whether the motion on the fault was strike-slip. dip-slip, or oblique slip. A geology student who was just learning to use a Brunton compass recorded the orientations of five slip lineations on one fault surface. The strike and dip of the fault surface is 320 degree, 47 degree NE. The student's five recorded lineation orientations are recorded in the table below. Determine which lineation orientations are feasible and which ones must represent a mistake on the part of the student because the given orientation does not lie within the fault plane. Give a brief explanation for each of your five answers. For the valid lineation orientations, indicate which type of fault motion is indicated.

Explanation / Answer

answer- the dip and strike of fault surface is 320 ,47 NE

and for the following lineation -

1- 34 due to north- feaseable -the amount of lineation in the dip direction of the fault- dip slip fault

2- 0 , 140 - not feaseable- lineation of fault is not in according to the dip direction of the fault - strike slip fault

3 33, N 66W- not feaseable- dip of fault is in north east direction so lineation can not be in NW direction, in the streonet it will goes in other quadrant - oblique slip fault

4- 47, 050- feaseable- dip slip fault

5- 75 due south - feaseable - dip slip fault

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