Abstract
Whilst geophysical exploration and petrological analyses imply that the Early Cretaceous North China Craton (NCC) destruction may have impacted the Taihang Shan in the central NCC, associated evidence indicative of contemporary upper-crustal extension is lacking. We herein investigate the formation mechanism and timing of the allochthons that consist of Mesoproterozoic to Mesozoic sedimentary rocks within the Paleoproterozoic Fuping complex in the middle Taihang Shan, based on field investigation and zircon U-Pb analysis. Our results indicate that the western boundary of the selected allochthon features wide collapsed breccias filled with synchronous Early Cretaceous (∼134 Ma) pyroclastics. These allochthons likely formed under extension along with the basement doming of the Fuping complex in response to crustal stretching in Early Cretaceous. Our results provide explicit evidence of upper-crustal extension in the Taihang Shan associated with the Early Cretaceous NCC destruction.
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