The geochemistry and petrogenesis of the Paleoproterozoic Green Mountain arc: A composite(?), bimodal, oceanic, fringing arc

► Geochemical dataset for ∼1780-Ma rocks of the Big Creek Gneiss, SE Wyoming, USA. ► Subduction zone origin for the Green Mountain arc of the northern Yavapai province. ► Crustal melting origin for bimodal magmatism within an arc environment. ► Isotopic support for northward-dipping subduction and possible older arc basement. ► Support for Paleoproterozoic crustal growth in a retreating accretionary orogen.