KAT Exploration Inc (KATX)

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The Olympic Dam Cu-U-Au-Ag-REE deposit

http://www.geo.tu-freiberg.de/oberseminar/os03_04/Jana_Enghardt.pdf


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


http://www.southernuranium.com.au/_dbase_upl/060607_drill_olympic_dam_district.pdf

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....