请用识别号来引用或链接此条目:
http://www.igeodata.org/handle/20.500.11758/281
点击复制成果名称: | Crustal structures revealed from a deep seismic reflection profile across the Solonker suture zone of the Central Asian Orogenic Belt, northern China: An integrated interpretation |
作者: | Shihong Zhang Rui Gao Haiyan Li Hesheng Hou Huaichun Wu Qiusheng Li Ke Yang Chao Li Wenhui Li Jishen Zhang Tianshui Yang G.R. Keller Mian Liu |
主题关键词: | Seismic reflection Crustal structure Tectonics Central Asian Orogenic Belt Solonker suture zone |
首次发表日期: | 2014-12 |
摘要: | TheSolonkersuturezoneisoneofthemostimportanttectonicboundariesinthesoutheasternpartoftheCentral AsianOrogenicBelt(CAOB).An~630 km-longreflectionseismicprofileacrossthissuturewasrecentlycompleted by the Chinese SinoProbe Project. The processed seismic data show clear crustal structures and provide new constraints on the tectonic and crustal evolution models. The Moho is delineated as a relatively flat boundary be- tween a strongly reflective lower crust and a transparent mantle at a depth of ~40–45 km (~14.5 s two-way travel time), which is in agreement with the refraction data recorded along the same profile. In a broad view, the profile images an orogen that appears bivergent with, and approximately centered on, the Solonker suture zone. The southern portion of this profile is dominated by a crustal-scale, cratonward propagating fold-and- thrust system that formed during the late Permian and Triassic through collision and subsequent convergence in a post-collisional stage. The major thrust faults are truncated by Mesozoic granitoid plutons in the upper crustandbytheMohoatthebaseofthecrust.ThisgeometrysuggeststhattheMohowasformedafterthethrust- ing event. The northern portion of the profile, although partially obliterated by post-collisional magmatic bodies, shows major south-dipping folding and thrusting. Bands of layered reflectors immediately overlying the Moho are interpreted as basaltic sills derived from the mantle. Episodic mafic underplating may have occurred in this region, giving rise to post-collisional magmatic events and renewal of the Moho. A few mantle reflectors are also visible. The overall geometry of these mantle reflectors supports the tectonic models that the southern orogen (Manchurides) experienced south-directed subduction and the northern orogen (Altaids) underwent north-directed subduction prior to collision along the Solonker suture zone. |
引用地址: | http://www.igeodata.org/handle/20.500.11758/281 |
所属集合: | 科技成果 |
文件中的条目:
条目 | 描述 | 大小 | 格式 | |
---|---|---|---|---|
Crustal structures revealed from a deep seismic reflection profile across.pdf | 5.39 MB | Adobe PDF |
![]() 下载/打开 |
在科技平台中所有的数据项都受到原著作权保护。
由于有些作者找不到原文手稿,所以从有关数据库上下载其作品以替之,如有疑义,请联系管理员。