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| Development models of growth fold |
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GUO Wei xing1,2, QI Jia fu1,2, LI Ming gang1, LI Yan you1
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(1.School of Resource and Information Technology in China University of Petroleum, Beijing 102249, China;2.State Key Laboratory of Petroleum Resource and Prospecting in China University of Petroleum, Beijing 102249, China)
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| Abstract: |
| Based on the kinematics characteristics of fold forming, the relationship between sedimentation and uplift of three kinds of models including hinge migration, limb rotation and hinge migration with limb rotation was discussed. According to three kinds of development models of fold, a method was proposed to calculate fold uplift rate and folding process using the thickness of growth strata. The results show that the limb dip angle of fold developed by hinge migration keeps constant, and the fold has the same uplift rate in its crest and limb. And parallel growth strata are formed. The limb length of fold developed by limb rotation keeps constant, and the fold has the different uplift rate in its crest and limb, and the uplift rate changes linearly along the limb. Wedge like geometry growth strata are formed. The limb length and limb dip angle of fold developed by hinge migration with limb rotation change in development. The lower parallel growth strata has the character of hinge migration, while the upper wedge like growth strata has the character of limb rotation. |
| Key words: tectonic uplift rate sedimentation rate hinge migration model limb rotation model hinge migration with limb rotation model |
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