half-graben structure 中文意思是什麼
half-graben structure
解釋
半地塹構造-
According to the analysis of the structure deformation variant direction the structure superposition during late period, and the tectonic stress field and deformation variant field, the cover extended nearly sn direction in early stage ( d - c ), maybe changed the direction in pernian ( especial the late permian ), and developed some new half - graben along sn direction except the succession activity at great fault zone. the direction of compression deformation variant, however, was nearly sn direction in indo - chinese epoch, ne - sw direction in early yanshan movement epoch, nne - ssw direction in late yanshan movement epoch, and transformed from ew to sn direction in himalayan movement epoch
根據不同構造層中變形方向及後期構造疊加的分析，對本區的構造應力場及變形場進行了探討，本區蓋層早期階段（ d - c ）為近南北向的伸展拉張，二疊紀（特別是晚二疊世）的伸展方向可能發生了改變，除在各斷裂帶繼承性活動外，沿南北方向又新生了一些半地塹。而在擠壓變形時，印支期主要為近南北向擠壓，燕山早期為nw - se向擠壓，燕山晚期為nne - ssw向擠壓，而喜山運動可能經歷了從ew向向sn向方向擠壓的轉變。
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