J.-X, Huang(1,2), G.C. Begg(1,2*), W.L. Griffin(2) and S.Y. O’Reilly(2) (1) Minerals Targeting International, West Perth, WA 6005, Australia (2) ARC Centre of Excellence for Core to Crust Fluid Systems (CCFS) and GEMOC, Macquarie University, NSW, Australia Direct age information on the lithospheric mantle is limited due to difficulty accessing representative samples worldwide and the lack of a suitable dating method. However, the age is a critical element to understanding the formation and evolution of the lithospheric mantle, which further affects our concepts of crustal formation and modification. Grappling with this issue is essential to understand the evolution of continents and their interaction with global geodynamic processes. The Re-Os isotopic system has been proven to be effective in dating mantle peridotites. Combined with detailed petrography and geochemical data, the Os model ages can be interpreted to represent the timing of main melting events, mantle metasomatism or an invalid age because of the mixture of isotopic signals from different events. We have compiled a comprehensive global Re-Os isotopic database of mantle samples together with other available information to show the valid age information, especially the melt-depletion age, on the formation of lithospheric mantle. The data include the in-situ analyses of sulfides/alloys by LA-MC-ICPMS, and the solution analyses of mineral separates and whole rocks measured by MC-ICPMS. We reprocessed the data using consistent parameters of different geological reservoirs to calculate both TRD and TMA ages. Based on 187Re/188Os we evaluate the validity of each model age from in-situ analyses. It is rated as: very good, <0.07; good, 0.07-0.12; moderate, 0.12-0.26; poor, >0.26. Both in-situ and solution data are judged to have acceptable validity if: (i) 4.0> TMA >=2.8, and TRD >=2.5, (ii) 2.8> TMA >=2.5, TRD >=1.6, (iii) 2.5> TMA >=1.6, TRD >=1.0, (iv) 1.6> TMA >=1.0, TRD >=0.541. TRD provides the minimum age estimate. TMA is presented in this abstract as the majority of the samples do have a certain amount of Re. TMA between 4.0-2.5 Ga with very good to good (in-situ) and/or acceptable (solution) validlity are observed in areas of known Archean lithosphere as well as many areas with post-Archean upper crust, most of which have previously been assumed to represent post-Archean lithospheric growth. These latter include: a location 700km northwest of the Slave Craton, southern USA (Arkansas), central Mexico, SE Spain, Cape Verde islands offshore of western Africa, southern Ethiopia, southern Patagonia, Svalbard (Arctic shelf), Central Asian Orogenic Belt (southern Siberia, Mongolia and NE China), Tibet, SE China, Penghu Islands (Taiwan Strait), southeastern Australia (Mt Gambier), and South Island of New Zealand. These findings indicate that Archean lithospheric mantle is far more widespread than generally considered, and that the upper crust cannot be assumed to be representative of the entire lithosphere. Contrary to models implicitly equating juvenile addition to the crust with an increasing global ratio of continental to oceanic lithosphere with time, these results suggest that tectonothermal reworking of Archean lithosphere is a major factor in the evolution of continents, and that net continental growth cannot be assumed.