Carlin-style gold deposits, Youjiang Basin, China: tectono-thermal and structural analogues of the Carlin-type gold deposits, Nevada, USA

摘要: The Triassic gold deposits of the Youjiang Basin, southern China, have been variously correlated to Carlin-style and orogenic or classified as a new intermediate deposit type. However, in terms multi-scale mineral system approach, they show remarkable similarities Tertiary Carlin-type Nevada distinct contrasts deposits. Both groups formed continent-scale post-orogenic extension event on fragmented continental crust underlain by metasomatized lithosphere. form roughly orthogonal trends that subparallel near-orthogonal margins crustal block, with controlled gentle anticlines, monoclines half-horsts extensional faults, not tight, “locked-up” shear zones. mineralogy ore geochemistry two are similar, differences consistent slightly deeper higher temperature formation older Chinese deposits, commensurate erosional levels. should be Carlin-type, rather than Carlin-like other terminologies, their lower endowment probably related more distal thermal fluid source