Those are good ballparks numbers to look for when they release the remaining assay results.
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Haematite occurs mainly in the center of the deposit and regional represents >95% of the rock
Mineral associations in the orebody The main minerals in the orebody, which more or less hosted the economically interesting elements like Cu, U, Au, Ag and REE are chalcopyrite (CuFeS2), bornite (Cu5FeS4), chalcocite (Cu2S), pitchblende (UO2/UO3), coffinite (U(SiO4)1- x(OH)4x), brannerite (U(Ti,Fe)2O6), bastnaesite ((Ce,La)(CO3)(F). Minor gold and silver are bound to copper sulphides
Haematite occurs mainly in the center of the deposit and regional represents >95% of the rock whereas magnetite make up 20% of the rock in strongly altered breccia zones. Reeve et al. (1990) documented that haematite generally displays ‘pre-existing minerals, including primary granitic comp onents, dykes and secondary hydrothermal or vein minerals’. But it can also ‘precipitated from solution in veins and vugs’ (Reynolds 2001). Especially haematite is closely connected with copper mineralisation at all scales. (Reynolds 2001) Apart from the magnetite and haematite alteration
The extensive sub-economic mineralisation in the magnetite zone intersected by CSD-1 is very encouraging for the adjacent less magnetic but dense gravity target to be the mineralised haematite zone of a large IOCGU system.http://www.geo.tu-freiberg.de/oberseminar/os03_04/Jana_Enghardt.pdf
Oreskes and Einaudi (1992) suggested that two fluids were responsible for ore genesis at Olympic Dam. The origin of the magnetite-rich ore was deep-seated or magmatic fluid. Later a second fluid of near surface provenance overprinted this primary magnetite with haematite alteration and in additional led to ore mineralisation.Association II is haematite, sericite, chalcopyrite, bornite, pitchblende, barite, fluorite, and chlorite. The greatest amount of chlorite and sericite exist in association I an II, and the hydrothermal quartz in association II is regionally defined and unusually in combination with sulphides. The third association is composed of ‘porous, vuggy, or massive haematite, granular quartz, and vein barite, with localized zones of silification ± quartz veining’ (Haynes et al. 1995). The quartz veining is in general brecciated. Association III mainly belongs to the later stage of mineralis ation and seldom contains fluorite
it impisortant to know that massive ore is seldom in the ODBC that means the mineralisation basically appears within the matrix of the breccias. Copper ore minerals are found as ‘disseminated grains, veinlets and fragments within the breccia zones’ (Reynolds 2001). Gold, silver and uranium always occur with sulphides, for example the uranium mineral pitchblende (uraninite) mainly appears as ‘fine-grained disseminations within haematitic breccias, intergrown with sulphides and haematite’ (Reynolds 2001). Silver mostly is present ‘in solid solution with the sulphide minerals’ (Reynolds 2001) and gold appears as strongly bound particles within and in connection with copper sulphide grains. The rare earth elements mainly La and Ce are found all over the breccia zones and especially in the central haematite quartz core its content is commonly higher.
WE GOOD MAYBE I dont read anything that has been reported that says the results are bad.... waiting for the rest of the results now that I know what good is. OD took nine holes to find the "good" stuff. The REE Values can be low throughout and still be indicative of OD deposits....
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