Centre for Earth, Ocean and Atomospheric Sciences

GSA Bulletin

GSA Bulletin

The impact of a tear in the subducted Indian plate on the Miocene geology of the Himalayan-Tibetan orogen

AbstractThe Yadong-Gulu Rift, cutting across the Gangdese belt and Himalayan terranes, is currently associated with a thermal anomaly in the mantle and crustal melting at 15–20 km depth. The rift follows the trace of a tear in the underthrusted Indian …

By Wang R, Weinberg RF, Zhu D, et al., 4 years ago
GSA Bulletin

The timeline of prolonged accretionary processes in eastern Central Asian Orogenic Belt: Insights from episodic Paleozoic intrusions in central Inner Mongolia, North China

AbstractUpdating magmatic profile in crucial constituent terranes across the Central Asian Orogenic Belt presents a key to chronicling the timeline of prolonged accretionary processes and termination of the Paleo-Asian Ocean in the northern China–south…

By Yuan L, Zhang X, Yang Z., 4 years ago
GSA Bulletin

Origin of syn-collisional granitoids in the Gangdese orogen: Reworking of the juvenile arc crust and the ancient continental crust

AbstractGranitoids at convergent plate boundaries can be produced either by partial melting of crustal rocks (either continental or oceanic) or by fractional crystallization of mantle-derived mafic magmas. Whereas granitoid formation through partial me…

By Tang Y, Chen L, Zhao Z, et al., 4 years ago
GSA Bulletin

Thermotectonic events recorded by U-Pb geochronology and Zr-in-rutile thermometry of Ti oxides in basement rocks along the P2 fault, eastern Athabasca Basin, Saskatchewan, Canada

AbstractBasement rocks below the Athabasca Basin, Saskatchewan, have been intensely altered through paleoweathering and multiple hydrothermal events, including the formation of world-class unconformity-type uranium deposits. Here, we demonstrate the ut…

By Adlakha EE, Hattori KK., 4 years ago
GSA Bulletin

Faulty foundations: Early breakup of the southern Utah Cordilleran foreland basin

AbstractAnomalous features of Upper Cretaceous strata in southern Utah challenge existing tectonic and depositional models of the Cordilleran foreland basin. Extreme thickness variations, net to gross changes, and facies distributions of nonmarine to m…

By Enriquez St. Pierre GA, Johnson CL., 5 years ago
GSA Bulletin

Pure sediment-derived granites in a subduction zone

AbstractThe Earth is unique in the Solar System due to significant volumes of granite in the lithosphere. However, the origins of granites are still highly debated, especially sediment-derived granites, which are often treated as a geochemical end-memb…

By Xu J, Xia X, Wang Q, et al., 5 years ago

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