2013/08/15 by Rui Gao, Chen Chen, Zhanwu Lu +5 · 73 citations
Earth and Planetary Sciences · #Crust #Fibrous joint #Geological and Geochemical Analysis #Geology #High-pressure geophysics and materials #Paleontology #Reflection (computer programming) #Seismology #Subduction #Tectonics #Terrane #earthquake and tectonic studies
paper · pdf · doi:10.1016/j.tecto.2013.08.006
published in Tectonophysics 606, 160-170 (Elsevier BV)
openalex publication_date 2013/08/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/02
From October 2009 to May 2010, through the support of the SinoProbe project a series of deep seismic reflection profiles were conducted. In order to image deep crustal structure of central Tibet, these profiles extend from the northern Lhasa terrane to the Qiangtang terrane by crossing the Bangong–Nujiang suture (BNS). The Moho depth varies from 75.1 km beneath the northmost Lhasa terrane to 68.9 km beneath southmost Qiangtang terrane. There is a 6.2 km sharp Moho offset across the BNS. Within 25 km to the north of the BNS, the Moho rises smoothly to 62.6 km. Distinct Moho reflector lies at 62.6–67.3 km beneath the Qiangtang terrane. The boundary of the middle and upper crusts and that between the middle and lower crusts interpreted from INDEPTH velocity model correspond to the strong reflection horizons at about18.8 km and 31.3 km depth beneath south Qiangtang terrane, respectively. A north-dipping series of reflection packages in the mid- to lower crust may mark subduction of the Lhasa terrane beneath the Qiantang terrane. The central portion of the reflection profile exhibits an antiformal structure at 14.1 km in the upper crust, which corresponds with the blueschist-bearing metamorphic belt.