Mcdougall, IanMaboko, Makenya A. H.Symonds, PhilipMcCulloch, Malcolm T.Williams, I. S.Kudrass, H. R.2016-05-122016-05-121994McDougall, I., Maboko, M.A.H., Symonds, P.A., McCulloch, M.T., Williams, I.S. and Kudrass, H.R., 1994. Dampier Ridge, Tasman Sea, as a stranded continental fragment∗. Australian Journal of Earth Sciences, 41(5), pp.395-406.http://hdl.handle.net/20.500.11810/2000Full text can be accessed http://www.tandfonline.com/doi/abs/10.1080/08120099408728150Dredging of the Dampier Ridge recovered small fragments of granite, gabbro and sandstone. Dating of the igneous samples by the U-Pb, K-Ar and Rb-Sr methods yielded precise ages mainly in the range 250 to 270 Ma, mid-Permian. An imprecise Sm-Nd mineral age of approximately 310 Ma might reflect slightly earlier emplacement of the gabbro. A granitic fragment has a composition approximating that a manimum melt. Taken together with the Late Palaeozoic emplacement ages and other geochemical and geophysical data, the evidence strongly supports the conclusion that the Dampier Ridge is a continental fragment, formerly part of eastern Australia, with its present location a consequence of continential rifting and opening of the Tasman Basin by sea-floor spreading.enDampier RidgeGeochemistryGeochronologyIsotopic datingMagmatismTasman BasinJournal Article10.1080/08120099408728150