Determination of Silurian-Devonian Arc-Basin Pattern in Western Junggar and Its Regional Tectonic Significance
Yang Wei
Wang Guocan
Zong Ruiwen
Xiao Long
Li Li
Yang Gang
Abstract：Paleozoic substance formations are widespread in Karamay-Emin area of western Junggar in Xinjiang,recording evo-lution information of Paleo-Asian Ocean.During Paleozoic,and especially the Late Paleozoic,this region has experienced a complex ocean-land transition process.Thus,a series of ophiolitic mélanges with nearly east-west and northeastern trends,and subduction-accretionary complexes of the ancient continental margin have been developed,resulting in the complicated rock for-mation system in the study area.To better probe into the ancient geographical attributes and structural framework between Si-lurian and Devonian in western Junggar,we define the tectonic paleogeographic properties of Silurian and Devonian in Karamay-Emin area and discuss arc-basin tectonic framework from Silurian to Devonian in western Junggar based on geological survey and relevant data in this study.The authors suggest that Paleo-Asian Ocean in the Karamay-Emin area began intense subduc-ting in Silurian and widely subduction-collage stage with archipelago arc-basin system in Devonian.Paleo-Asian Ocean along the Karamay-Emin area started its residual oceanic basin evolutionary stage after Devonian.
Keywords：western JunggarSilurianDevonianarc-basin patterntectonic paleogeographytectonic evolution
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：14( 448-460,503 )