Abstract Knowing the original size of Greater India is a fundamental parameter to quantify the amount of continental lithosphere that was subducted to help form the Tibetan Plateau and to constrain the tectonic evolution of the India-Asia collision. Here, we report paleomagnetic data from Upper Cretaceous rocks of the western Tethyan Himalaya that are consistent with a model that Greater India extended ∼2700 km farther north from its present northern margin at the longitude of 79.6°E before collision with Asia. Our result further suggests that the Indian plate, together with Greater India, acted as a single entity since at least the Early Cretaceous. The pre-collision geometry of Greater India's leading margin helped shape the India-Asia plate boundary. The proposed configuration produced right lateral shear east of the indenter, thereby accounting for the clockwise vertical axis block rotations observed there.

中文翻译：

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白垩纪晚期大印度的扩张

摘要 了解大印度的原始大小是量化大陆岩石圈俯冲量以帮助形成青藏高原和限制印亚碰撞构造演化的基本参数。在这里，我们报告了来自西特提斯喜马拉雅山上白垩纪岩石的古地磁数据，这些数据与大印度在与亚洲碰撞之前在东经 79.6°E 向北延伸约 2700 公里的模型一致。我们的结果进一步表明，至少从早白垩世开始，印度板块与大印度一起作为一个整体。大印度领先边缘的碰撞前几何形状有助于塑造印度-亚洲板块边界。建议的配置在压头东侧产生右侧剪切，