Full-Text Search:
Home|About CNKI|User Service|中文
Add to Favorite Get Latest Update


XU Zhengyu1, LI Dacheng1, LU Wenzhong1, LIN Ge2 and LIU Chiyang3 (1. Hangzhou Institute of Petroleum Geology, PetroChina Company Limited, Hangz hou 310023, China; 2. Guangzhou Institute of Geochemistry, Chinese Academy of Sc iences, Guangzhou 510640, China; 3. Department of Geology, Northwest University, Xi’an 710069, China)  
Derailed structural analyses and interpretations indicate that Yud on g area has undergone three development stages from weak orogeny and stable crato nic basin during Late Proterozoic-Paleozoic, strong orogeny and peripheral fore land basin during Mesozoic to post-orogenic and residual basin during Cenozoic, and the modern structural pattern and mode are actually resulted from compound, association and superposition of multiple stages of tectonic deformations. As a whole, the study area can be divided into three structural layers. The regional tectonic morphology is in a thin-skin structural pattern of advance propagatio n-type thrust nappe, and the local tectonics occurs in seven variant patterns. Here in the lower structural layer occur duplex structures and fault-bend folds , in the middle structural layer occur fault-bend folds and fault-propagation folds, while in the upper structural layer mainly occur surge folds, fault-prop agation folds and pop-up structures. Formation of these structures involves thr ee stages from Late Yanshanian, Early Himalayan and Late Himalayan. Generally, t he west-thrusting and NE-trending thrust structure system was formed earliest, the SE-thrusting and NEE-trending thrust fold system was formed secondly, and the east-thrusting and NNE-SN-trending thrust fold system was formed last. T he structure in the north of the study area was formed earlier than that the mid dle and south. The NWW-EW-trending nappe fold system in the north end actually disturbed and constrained the northward extension of the NE-NEE-trending thru st nappe system in the middle-north, while the transform (regulation) zone as d eveloped in the middle has obvious accommodation effect.
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©CNKI All Rights Reserved