The Granites-Tanami Orogen (GTO) is a lower-greenschist to amphibolite facies succession of >1840 Ma backarc basalts and volcaniclastic-sedimentary rocks that was metamorphosed (~1850–1840 Ma), and later intruded by granites and granodiorites (~1825–1791 Ma) during assembly of the Kimberley Craton, proto-Northern Australia Craton, and the Arunta Region.

The data presented here show geochronological, sedimentological, petrographic, and geochemical evidence for the existence of a volcanic arc (‘Tanami Arc’) in the GTO at ~1912 Ma. Furthermore, the combination of volcanic structures, including fiamme and hyaloclastites, and a mafic HFSE geochemical signature of the pyroclastic and volcaniclastic-sedimentary turbidite successions suggests a syndepositional volcanic front within an oceanic arc-backarc system during deposition of the Dead Bullock Formation (and equivalents). Geochemical vectors applied to existing stratigraphic interpretations indicate a trend towards more felsic composition with younging, providing an alternative proxy for relative stratigraphy and a tool for exploration and correlation across the GTO. The localisation of the volcanic arc within the N-NNE dipping arc-continent collision zone has important implications for the debated Palaeoproterozoic amalgamation of the North Australia Craton.

Granites-Tanami Orogen (GTO) 是由>1840 Ma 弧后玄武岩和火山碎屑-沉积岩变质（~1850-1840 Ma），后来被花岗岩和花岗闪长岩（~1825 1791 Ma) 在金伯利克拉通、原北澳大利亚克拉通和阿伦塔地区组装期间。

此处提供的数据显示了大约 1912 Ma 时 GTO 中存在火山弧（“Tanami Arc”）的年代学、沉积学、岩相学和地球化学证据。此外，火山结构的组合，包括火焰和透明碎屑岩，以及火山碎屑和火山碎屑-沉积浊积岩系列的基性 HFSE 地球化学特征表明，在 Dead Bullock 组（和等效物）沉积期间，大洋弧-弧后系统内存在同沉积火山前沿）。应用于现有地层解释的地球化学矢量表明，随着年轻化，长英质成分呈更多趋势，为相对地层学提供了替代替代品，并为整个 GTO 的勘探和相关性提供了工具。