The Qinling–Tongbai–Hong’an–Dabie–Sulu Orogen links two cratons, North China and South China, and records the reorganization and transfer of plates from Rodinia to Gondwana and Eurasia. The formation of North Qinling at the southern North China margin (524–378 Ma) by subduction–accretion processes and the collision between North and South China (270–190 Ma) are pivotal for this reorganization. We outline the geological processes that link both events by combining phase equilibria modeling, conventional thermobarometry, U–Pb (zircon, titanite, garnet–staurolite) and 40Ar/39Ar and Rb–Sr (amphibole, micas) geochronology. The North Qinling experienced transpressional reactivation of shear zones, local fluid percolation, and metamorphism up to the lowest amphibolite facies (≲ 550 °C) until 324 Ma; protracted uplift and erosion with slow cooling (1 °C/Myr) led to its peneplanation prior to 260 Ma. The southerly abutting Wuguan Complex underwent two consecutive metamorphic events: while the older was diverse (600–750 °C, 0.5–1.2 GPa), the younger had a regionally homogeneous peak (590 °C, 0.9 GPa) at c. 324 Ma. Subduction and early exhumation of the South China margin occurred at 299–250 Ma in East Qinling. During the exhumation, medium-grade blueschists (500 °C, 1.0–1.3 GPa) were imbricated with low-grade rocks (300 °C, 0.5–1.0 GPa). Subsequent extensional doming with percolation of a low-salinity, hydrous fluid and south-vergent thrusting brought these rocks to near-surface levels by 200 Ma. New and published data indicate that plate convergence governed geologic processes to the south of North China not only before 378 Ma but protractedly or episodically until 190 Ma. This prolonged history is inconsistent with the amalgamation of North China to Gondwana but substantiates paleogeographic reconstructions with North China as a Paleozoic island continent. Carboniferous–Triassic subduction in the Qinling ultimately led to the welding of North China and South China, completing their transfer from Rodinia to Eurasia.

中文翻译：

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秦岭造山带的石炭纪—三叠纪俯冲作用


秦陵 - 通白 - 虹安 - 大别 - 苏禄造山带连接华北和华南两个克拉通，记录了板块从罗迪尼亚到冈瓦纳和欧亚大陆的重组和转移。通过俯冲-吸积过程在华北南部边缘（524-378 马）形成北秦岭，以及华南南北之间的碰撞（270-190 马）是这种重组的关键。我们通过结合相平衡建模、常规温气压法、U-Pb（锆石、钛铁矿、石榴石-十字石）和 40Ar/39Ar 和 Rb-Sr（闪石、云母）地质年代学，概述了将这两个事件联系起来的地质过程。北秦岭经历了剪切带的跨压再激活、局部流体渗流和变质作用，直至最低的角闪岩相 （≲ 550 °C），直到 324 马;缓慢冷却 （1 °C/Myr） 的长期隆起和侵蚀导致它在 260 马 之前形成平原。南向相邻的五关杂岩经历了两次连续的变质事件：较老的为多种多样（600-750 °C，0.5-1.2 GPa），而较年轻的在约324 马处具有区域均匀的峰值（590 °C，0.9 GPa）。华南边缘的俯冲和早期挖掘发生在东秦岭 299–250 马。在挖掘过程中，中等品位的蓝片岩（500 °C，1.0-1.3 GPa）被低品位的岩石（300 °C，0.5-1.0 GPa）浸没。随后的伸展圆顶，低盐度、含水流体和南向逆冲的渗透使这些岩石在 200 马 时达到接近地表的水平。新的和已发表的数据表明，板块辐合不仅在 378 马 之前支配着华北以南的地质过程，而且在 190 马 之前长期或间歇性地支配着。 这一漫长的历史与华北与冈瓦纳的合并不一致，但证实了华北作为古生代岛屿大陆的古地理重建。秦岭的石炭纪-三叠纪俯冲最终导致了华北和华南的焊接，完成了它们从罗迪尼亚到欧亚大陆的转移。