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在北秦岭北西—北西西向显生宙造山带核部鉴别出与其斜交的北西向古构造带,可能为被改造了的北北西向新元古代造山带的残迹。强烈的区域变形(959～889Ma)和变质特别是高压变质(996～750Ma)以及S→I→A型花岗岩演化(959～725Ma)揭示,该造山带可能经历了同碰撞、晚碰撞到碰撞后伸展的碰撞造山旋回。由此推测,在该区新元古代时期可能发生了陆块的汇聚与裂解;当时造山带的原始方位及两侧汇聚陆块的边界可能是北北西向,汇聚方向可能是北东东向。
The NW-trending paleo-tectonic belts identified from the North-North-West-Westward direction of the Phanerozoic orogenic belt may be the remnants of the Neoproterozoic orogeny reconstructed. Strong regional deformation (959-889Ma) and metamorphism, especially high-pressure metamorphism (996-750Ma), and S → I → A type granite evolution (959-725Ma) reveal that the orogenic belt may have experienced the same collisions, late collisions to collisions Stretching collision orogeny cycle. It can be inferred that the convergence and fragmentation of the land blocks may take place during the Neoproterozoic period in this area. At that time, the original orientation of the orogenic belt and the boundaries of converging landlocks on both sides may be north-northwest and west, and the convergence direction may be north-east-east.