“中央造山带”早古生代缝合带及构造分区概述

Early Paleozoic suture zones and tectonic divisions in the “Central China Orogen”

“中央造山带”是夹持于中国塔里木、华北和扬子克拉通之间的近东西向延展的(局部为北东向和北西向)显生宙造山系统。该造山带中包括了库地-喀拉塔什、红柳沟-肃北-北祁连、南阿尔金-滩间山、昆中、朱阳关-夏馆和商州-丹凤6条早古生代缝合带。被缝合带所围限的前寒武纪地质构造单元包括中阿尔金-祁连-全吉地块、柴达木地块、北秦岭地块和东、西昆仑2个变质地体。南秦岭原为扬子克拉通的北部边缘,但卷入了显生宙造山带,成为中央造山带的一部分。对上述6条早古生代缝合带和6个前寒武纪地质构造单元的特点进行了概略总结,并阐述了各地质构造单元中的构造地层系统和热-构造事件的年代格架。

The ＂Central China Orogen＂ is a nearly E-W-trending （locally NE- and NW-trending） Phanerozoic orogenic system sandwiched between the Tarim and North China cratons and Yangtze craton. The orogen contains six Early Paleozoic suture zones, i.e.： the Kiida-Karatax, Hongliugou-Subei-North Qilian, South Altyn Tagh-Tanjianshan, Central Kunlun, Zhuyangguan-Xiaguan and Shangzhou-Danfeng suture zones. The Precambrian tectonic units bounded by the above suture zones include the Central Altyn Tagh-Qilian-Quanji massif, Qaidam massif and North Qinling massif and East and West Kunlun metamorphic terranes. The South Qinling Range was a northern margin of the Yangtze craton but was involved in the Central China Orogen during the Phanerozoic. The characteristics of the above-mentioned six suture zones and six Precambrian tectonic units are summarized, and the tectonostratigraphic system and chronological framework of major thermo-tectonic events in these tectonic units are described.