研究人员利用实验标定的地压计计算了华北克拉通镁铁质岩浆的平衡压力，这直接限制了克拉通下岩石圈-软流圈边界深度随时间的演变。结果表明，早白垩世克拉通东部岩石圈厚度由约200 km减小到约35 km。这种强烈的破坏发生在大约10m.y.的短时间间隔内，至少在局部是这样。在这种破坏之后，随着上涌的软流圈冷却并形成年轻岩石圈，岩石圈逐渐变厚并稳定下来。
研究人员认为，这种灾难性的岩石圈减薄是由岩石圈整体拆沉造成的。由于这种厚地幔根部的灾难性损失，华北克拉通东部可能经历了快速的地壳反弹和地表隆升，在已被破坏区130 - 120 Ma之间形成的不整合面记录了这一点。
据了解，大陆的核心，表现为克拉通，是地球岩石圈中寿命最长的部分。然而，一些地区的古克拉通可能通过尚未完全理解的机制被基本破坏。
附：英文原文
Title: Catastrophic craton destruction via wholesale lithosphere delamination
Author: Hao Chen, Ming Tang, Shuguang Song
Issue&Volume: 2023-03-15
Abstract: The nuclei of continents, manifested as cratons, are the most long-lived parts of Earth’s lithosphere. However, ancient cratons in some areas can be substantially destroyed through mechanisms that are not fully understood. We used experimentally calibrated geobarometers to calculate the equilibrium pressures of mafic magmas in the North China craton, which directly constrain the evolving depth of the lithosphere-asthenosphere boundary beneath the craton through time. We show that the lithospheric thickness of the eastern part of the craton decreased from ~200 km to ~35 km in the Early Cretaceous. This intense destruction took place within a short time interval of ~10 m.y., at least locally. Following this destruction, the lithosphere gradually rethickened and stabilized as the upwelling asthenosphere cooled and formed a juvenile lithosphere. We suggest that this catastrophic lithosphere thinning resulted from wholesale lithosphere delamination. As a consequence of this catastrophic loss of thick mantle roots, the eastern part of the North China craton may have undergone rapid crustal rebound and surface uplift, as recorded by the regional unconformities formed between 130 and 120 Ma in the destructed area.
DOI: 10.1130/G50803.1
Geology：《地质学》，创刊于1973年。隶属于美国地质学会，最新IF：6.324
官方网址：https://pubs.geoscienceworld.org/geology
投稿链接：https://geology.msubmit.net/cgi-bin/main.plex