野外測量與紀錄張中白

• 1. 時間• 2. 地點• 3. 座標• 4. 一般性描述• 5. 露頭描述• 6. 測量• 7. 露頭描繪• 8. 路線及構造簡圖• 9. 分析與解釋• 10. 其他

Brittle deformation

JointTension gashStyloiteFault etc..

Reconstruction of regional stress

Structural geology

Structure

Ductile deformation

FoldFoliationLineation etc.. Fault

Fault surfaces displaying the direction of slip lineation

Stereographic projection of a fault slip data set

Lower hemisphere project

Fault plane

Slickensidelineation

pitch

Fault plane

pitch

Measurement includes[LL_NNN_NNL_NNN ( or NNL)]

• 2 Letters (index 1 and 2) defining the structure

• a strike ( 3 numbers from 0 ~ 360)

• a dip (2 numbers + a letter) and

• if necessary, a new blank followed by the geometry of the Lineation : azimuth ( 3 number)*3, or pitch / rank (2 number + 1 letter)

  First letter Second letter

For striated fault

C = clear I = reverse fault

P = possible N = normal fault

S = supposed S = left-lateral strike-slip fault

  D = right-lateral strike-slip fault

For beddingN = normal B = bedding

I = reversed  

2 numbers show the dipping angle from 0~90 ， 1 letter show the dipping direction N, S, E or W

Method of right dihedrons

obtaining the orientationof principal stress axesfrom statistic method

S’/S = f (inclination)

STEREOGRAPHIC NET

S’/S = const.

Wuff net Schmidt net

Wuff net (equiangular)

OPM isosceles triangle

ON/OP = tan (p/4-i/2)

ON = R tan (p/4-i/2)

Schmidt net (equal-area)

ON = OX, OX = (2)1/2 OH

OH/OP = sin (p/4-i/2)

ON = (2)1/2 R sin (p/4-i/2)

(Chang C. P., Unpubl.)

露頭的描繪

台中 - 中橫公路