Full-Text Search:
Home|Journal Papers|About CNKI|User Service|FAQ|Contact Us|中文
《Acta Petrologica Sinica》 1995-02
Add to Favorite Get Latest Update

Nature of Main Tectono-Lithostratigraphic Units of the Qinling Orogen: Implications for the Tectonic Evolution

Zhang Guowei1;Zhang Zongqing2 and Dong Yunpeng1(1.Department of Geology,Northwest University,Xi'an,710069;2.Institute of Geology CAGS,Beijing,100037)  
The basic facts of the Qinling orogen are that it is composed of three distinct tectonostratigraphic units, which possess different crustal compositions and textures, and evolved in differing tectonic regimes in three stages. The lower unit presents two kinds of orogenic basements. The middle unit presents a Late Proterozoic--Middle Triassic succession, which consists of depositional sequences developed at both active and passive continental margins, subduction-related ophiolites and collisional granites. All these demonstrate a plate tectonic regime in this stage. In addition, widespread basement uplift also implies the subcrustal underplating and vertical accretion. The upper unit is made up of both intruded granites and sediments deposited in foreland, hinterland, and postorogenic rifted basins. Intensive magmatism and crustal deformation indicate strong postorogenic intracontinental orogenesis during the Mesozoic and Cenozoic eras.The fundamental composition and evolution of the Qinling were built up by different orogenensis under different mechanisms throughout its history.
【Fund】: 国家自然科学基金
【CateGory Index】: P542
Download(CAJ format) Download(PDF format)
CAJViewer7.0 supports all the CNKI file formats; AdobeReader only supports the PDF format.
©2006 Tsinghua Tongfang Knowledge Network Technology Co., Ltd.(Beijing)(TTKN) All rights reserved