KAT Exploration Inc (KATX)

[ShortonCash]

[b

]Shallow: Ore- hematite, magnetite, copper sulfide minerals (principally chalcopyrite, possibly bornite and chalcocite),
apatite, pyrite, monazite, bastnaesite, florencite, xenotime, uraninite, brannerite, and pitchblende.

Seems the shallow rocks we as the should be according to the usgs......

Olympic Dam-type deposits


Quote:
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whereas the subgroup that contains significant amounts of copper-sulfide minerals
and uranium are termed Olympic Dam-type deposits (Model 29b).

pubs.usgs.gov/of/1995/ofr-95-0831/CHAP22.pdf

Magnetite deposition and sodium-rich alteration zones predominate in the deeper (hotter) parts of these systems, whereas hematite, copper-sulfide minerals, and potassium-rich alteration are more prevalent in their shallower parts (fig. 1).
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Examples include the giant Olympic Dam uranium-copper-gold-silver-bearing deposit (Australia), the giant Bayan
Obo rare earth element-niobium deposit (China), numerous iron deposits in the Kiruna district

Magnetite-rich systems can be readily recognized by aeromagnetic or ground magnetic surveys although surrounding country rocks that contain significant amounts of magnetite may complicate interpretation (for example, Kiruna area). Magnetite-dominated deposits in Missouri, for example, are associated with high-amplitude positive magnetic anomalies (Kisvarsanyi, 1981). Hematite-rich systems may have little magnetic expression. However, because both magnetite and hematite enriched rocks are much more dense than host rocks, they may be detectable by gravity surveys. Large deposits may be located on major lineaments that can be detected on satellite imagery. The unexposed Olympic Dam deposit, for example, was partly discovered because of its association with coincident positive gravity and magnetic anomalies

Alteration zones associated with many deposits have been recrystallized during metamorphism so that they are not readily identifiable by geophysical methods.

Host rocks
Host rocks vary widely and may include virtually any rock type; however, most host rocks are felsic volcanic or
plutonic rocks.
Surrounding geologic terrane
Most deposits are in moderate to high grade metamorphosed felsic volcanic or plutonic rocks

Nature of ore Most ore consists of either magnetite, hematite, or mixtures thereof. Less commonly, ore, including that at Olympic Dam and Bayan Obo, is rich in combinations of copper sulfide minerals, uranium, and rare earth elements. Ore may be either stratiform or discordant. Magnetite-rich deposits are more commonly concordant, whereas hematite-rich deposits are commonly discordant. Magnetite-rich ore is generally equigranular. Where copper sulfide minerals are present, chalcopyrite is dominant. At Olympic Dam, however, large amounts of chalcocite and bornite are present in addition to chalcopyrite. Pyrite, in veins and disseminated in ore, is generally present in minor amounts

Deposit trace element geochemistry
In addition to copper, uranium, and the rare earth elements, which may be important ore constituents, deposits may
also contain anomalous concentrations of Ba, P, F, Cl, Mn, B, K, and Na. Some deposits also have elevated Au,
Ag, Co, Ni, Te, As, Mo, and Nb abundances.
Ore and gangue mineralogy and zonation
Minerals listed in general decreasing order of abundance (potentially acid-generating minerals underlined).
Deep: Ore- magnetite, apatite, minor chalcopyrite, and pyrite. Wall rock- albite, actinolite, and chlorite.
Shallow: Ore- hematite, magnetite, copper sulfide minerals (principally chalcopyrite, possibly bornite and chalcocite),
apatite, pyrite, monazite, bastnaesite, florencite, xenotime, uraninite, brannerite, and pitchblende. Wall rock-
potassium feldspar, sericite, chlorite, actinolite, barite, carbonate, epidote, and biotite.
Mineral characteristics
Sulfide minerals are present in some magnetite-rich deposits, but are more common in hematite-bearing ore. Sulfide
minerals are usually a minor component of most deposits and are predominantly copper or iron sulfide minerals.

Drilling tested two separate target areas: a deep coincident gravity and magnetics anomaly in drill hole RR10-01 and Rare Earth Element (REE) plus gold potential within altered peralkaline felsic volcanic rocks in RR10-02.

Hole RR10-02 intersected variably altered and mineralized peralkaline felsic volcanic rocks throughout the upper 245 meters of the 344 meter long hole. Initial ICP analytical results indicated elevated lanthanum and cerium through several sections; these, along with other selected sections of the drill hole were sent for a complete suite of rare earth and associated elements. Results have been received for the upper section of the drill hole from 30 to 40.1m. The analyses indicate a 7.5m interval from 30.0 to 37.5m having elevated rare earth elements and zircon, returning a weighted average of 0.164% TREO (including yttrium) consisting of 0.113% LREO and 0.051% HREO (including yttrium). The results also returned 0.268% zirconium dioxide, 0.039% Nb2O5 (niobium oxide) and 0.022% rubidium. A table showing all analyses will be posted to our website in the near future. Additional samples are being analyzed for the rare earth and associated elements from other deeper sections of the hole and will be reported when received.

Hole RR10-01, approximately 500 meters south of RR10-02, was drilled to a depth of 719.3 meters to test a coincident gravity and magnetics anomaly. The hole intersected mafic volcanic rocks, conglomerates and mafic intrusive rocks that contain indications of sub-economic copper mineralization throughout most of the drill hole (including native copper and chalcopyrite). The conglomerate unit is also strongly hematite altered, which could explain the gravity anomaly. The upper part of the magnetics geophysical anomaly is coincident with a thick magnetic mafic dyke.

Ken Stead, President/CEO, states: "We are very encouraged by the presence of rare earth element rich rocks at Rusty Ridge and are eagerly awaiting the next batch of assays to find out just how consistent REE are at depth and if the grades improve. While there is much work yet to be carried out to determine the significance of this discovery, we feel we are in the very early stages of a most interesting project."

The property will be re-examined in light of potential for additional rare earth element mineralization. Further testing of the main Rusty Ridge zone as well as other targets including strong IP (Induced Polarization) anomalies, some of which are coincident with gravity anomalies, will be considered


Ken Stead, President/CEO, states: "We are very encouraged by the presence of rare earth element rich rocks at Rusty Ridge and are eagerly awaiting the next batch of assays to find out just how consistent REE are at depth and if the grades improve.