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Sunday, January 16, 2011 8:11:18 PM
The OLYMPIC DAM Cu-U-Au-Ag-REE deposit, Australia 9 http://www.geo.tu-freiberg.de/oberseminar/os07_08/Thomas%20Hahn.pdf
I have read all of the post since the Christmas gift posting and wonder how many posters know anything about what Olympic Dam results were suppose to look like.... The core is suppose to be barren..... the REE are suppose to spread out on the top. From what I have read a gift was given and few brother to check the language it was give in .....IMO. There is a reason the added more claim...... the field is HUGE. IMO
OD "Ore zones and mineralization patterns
Although the ore zones account for only a small part of the whole volume of the
breccia complex Cu, U, Ag and Au minerals are widespread within the deposit
(Fig.5.). There are background levels of around 0.5 wt. % copper, 0.2 kg/t uranium
oxide, 1 g/t silver and 0.5 g/t gold. The highest grade of copper and uranium mineralization
is associated with more hematite altered rocks even though the hematitequartz
core is barren of copper and uranium minerals"
http://www.minerals.net/mineral/sulfides/chalcopy/chalcopy.htm
Chalcopyrite is the chief ore of copper.
"Peacock Ore" which is sold to many amateur mineral collectors and thought to be Bornite usually is Chalcopyrite that is treated with acid to produce a greater tarnish.
http://ih.advfn.com/p.php?pid=nmona&cb=1267833742&article=40509419&symbol=NO%5EKATX
RR The host rocks for most of the mineral occurrences and the unit overlying the most intense portion of the magnetic anomaly is a brecciated, hematitic felsic volcanic rock, locally with veins of purple fluorite and disseminated pyrite
RR 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[/color], which could explain the gravity anomaly. The upper part of the magnetics geophysical anomaly is coincident with a thick magnetic mafic dyke
OD where a long and repeated process of brecciation and magnetite-
hematite alteration took place. Hence the deposit is located within a huge complex
of irregularly shaped and variably mineralised breccia bodies which is knownas the Olympic Dam Breccia Complex
http://www.geo.tu-freiberg.de/oberseminar/os07_08/Thomas%20Hahn.pdf
OD Furthermore a variable REE mineralization of mostly cerium and lanthanum is disseminated across the deposit.
OD Contrary to this Johnson & McCulloch (1995) proposed a fluid influenced by mafic to ultramafic, mantle derived magma. However, it is relatively ensured that
the ore mineralization was connected with this late hematite alteration
Veins, veinlets and vein fragments are very common within the breccia complex.
They are mono- or polymineralic and consist of mineral assemblages which also
dominate the alteration and mineralization associations of the breccias. Those are
sericite, barite, siderite, chlorite, fluorite, sulfides, quartz or pitchblende. A
second, late stage array of veins contains a laminated barite-siderite-flouritesulfide
mineralization and extends into the sedimentary cover.
The ODBC was also intruded by several ultramafic, mafic and felsic dykes with
irregular wispy or tentacular shapes (Reynolds, 2000). At the top of the deposit
they are less than 1 meter thick but thicker and more abundant at the depth
OD Economic ore minerals
Principal copper-bearing minerals are chalcopyrite, bornite and chalcocite, which
precipitated co-genetically. There also is a small amount of native copper and other
copper-bearing minerals
OD Over and above that, the importance of the Olympic Dam deposit with regard to of deposit. Furthermore, it describes a genetic model which can be applied for many deposits all over the world.
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