Chinese East Tianshan is a key area for understanding the Paleozoic accretion of the southern Central Asian Orogenic Belt. A first accretion-collision stage, before the Visean, developed the Eo-Tianshan range, which e...Chinese East Tianshan is a key area for understanding the Paleozoic accretion of the southern Central Asian Orogenic Belt. A first accretion-collision stage, before the Visean, developed the Eo-Tianshan range, which exhibits north-verging structures. The geodynamic evolution included： i） Ordovician-Early Devonian southward subduction of a Central Tianshan ocean beneath a Central Tianshan arc; ii） Devonian oceanic closure and collision between Central Tianshan arc and Iqli-North Tianshan block, along the Central Tianshan Suture Zone; iii） Late Devonian-earliest Carboniferous closure of a South Tianshan back-arc basin, and subsequent Central Tianshan-Tarim active margin colli- sion along the South Tianshan Suture Zone. A second stage involved： i） Late Devonian-Carboniferous south- ward subduction of North Tianshan ocean beneath the Eo-Tianshan active margin （Yili-North Tianshan arc）;展开更多
文摘Chinese East Tianshan is a key area for understanding the Paleozoic accretion of the southern Central Asian Orogenic Belt. A first accretion-collision stage, before the Visean, developed the Eo-Tianshan range, which exhibits north-verging structures. The geodynamic evolution included： i） Ordovician-Early Devonian southward subduction of a Central Tianshan ocean beneath a Central Tianshan arc; ii） Devonian oceanic closure and collision between Central Tianshan arc and Iqli-North Tianshan block, along the Central Tianshan Suture Zone; iii） Late Devonian-earliest Carboniferous closure of a South Tianshan back-arc basin, and subsequent Central Tianshan-Tarim active margin colli- sion along the South Tianshan Suture Zone. A second stage involved： i） Late Devonian-Carboniferous south- ward subduction of North Tianshan ocean beneath the Eo-Tianshan active margin （Yili-North Tianshan arc）;
