Randomized trial analyzes monzogabbros to constrain their formation and tectonic implications in the Gangdese Belt, suggesting significant geological processes.
Key Points
This research aims to constrain the tectonic setting and formation processes of Late Triassic monzogabbros in the Western Gangdese Belt.
Conducted zircon U–Pb dating to determine ages of various monzogabbro samples.
Performed whole-rock geochemistry and Sr–Nd–Hf isotopic analysis to characterize the rocks' chemical and isotopic signatures.
Analyzed amphibole mineralogy to draw comparisons between monzogabbros and other basic rocks in the region.
Determined a formation age of 203.5 ± 2.7 Ma for the monzogabbros, with four age groups identified.
Confirmed geochemical characteristics consistent with continental margin arcs, including LILE enrichment and HFSE depletion.
Established that monzogabbros were derived from a metasomatized mantle wedge influenced by subducted materials.