1.褶皱等倾斜线图的编制 1.1褶皱等倾斜线图的编制

Review: 1.What is the orientation relationship between maximum shear stresses and principal stresses? 2. What are trajectories of principal stresses?

(A)General triaxial stress ellipsoid in perspective view. (B)Views normal to each of the principal planes of the ellipsoid. (After W.D. Means,1976)

OBSERVATION OF TECTONIC SAMPLES Observe tectonic samples in the STRUCTURAL SCOPE. Discuss what you observed with your group members. Select one representative of the group to exchange ideas with other groups in the class

INTRODUCTION TO STEREOGRAPHIC PROJECTIONS Basic principles Basic procedures Exercise in class

hinge lines axis A axial plane axial surface B (imaginary) Axis axial plane and axial surface

hangingwall ramp A- Ramps and flats hangingwall B-Hangingwall ramp and footwall footwall ramp footwall ramp B C-? thrust sequence New thrusts develop in the footwall

hangingwall ramp A- Ramps and flats hangingwall B-Hangingwall ramp and footwall footwall ramp footwall ramp B C-? thrust sequence New thrusts develop in the footwall

1矿物样品的采集和分选 一、样品的采集 野外采集样品应注意其目的性、典型性、代表性及系统性

1矿物的光学性质 矿物的光学性质: 矿物对可见光的反射、折射、 吸收等所表现出来的各种性质