Please explain how to find this information. I am not at all sure how to determi

Question

Please explain how to find this information. I am not at all sure how to determine which ones are feasible, or how to determine what type of fault I am dealing with.

Problem 1.3 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° 47°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. Lineation (plunge and trend) Feasible? (yes or no) Type of motion indicated (strike-slip, dip-slip, or oblique-slip) Explanation a) 34, due north b) 0, 140 c) 33 N66 W d) 47°, 050° e) 75°, due north

Explanation / Answer

Ans:

a) yes, fissible. As the lineation plunge is lesser than bed dip angle and direction is towards due north so it is fissible.Type of motion is oblique slip.

b) Yes, fissible. As it is towards strike of fault. It is strike slip motion.

c) No, not fissible. As it is opposite direction of fault plane.

d)Yes, fissible. It is towards dip of the fault plane. it is dip slip motion.

e) No, not fissible. As it is larger than dip of the bed. a lineation pluge always lower than fault plane dip angle.

Related Questions

Navigate

• Browse (All)
• Browse P
• Subjects

---