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Area C mine, Mining Area C (Northern Flank; Packsaddle), Weeli Wolli Creek Area, East Pilbara Shire, Western Australia, Australiai
Regional Level Types
Area C mineMine
Mining Area C (Northern Flank; Packsaddle)- not defined -
Weeli Wolli Creek AreaArea
East Pilbara ShireShire
Western AustraliaState
AustraliaCountry

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Key
Latitude & Longitude (WGS84):
22° 54' 55'' South , 118° 58' 0'' East
Latitude & Longitude (decimal):
Locality type:
Köppen climate type:
Owned/operated by:
BHP (85%), Itochu Minerals (8%)
Other/historical names associated with this locality:
MAC, Area C


Mining Area C (MAC) is an iron ore mine owned and operated by BHP Billiton under the Mt Goldsworthy Joint Venture (85% BHP Billiton, 7% Mitsui Iron Ore Corporation, 8% ITOCHU Minerals and Energy of Australia).

Packsaddle, North Flank and South Flank may also be used to refer to Mining Area C, but these names refer to more specific subdivisions within mine site. The site currently encompasses a series of pits along the North Flank and Packsaddle and ranges. Mining began in 2003 in C-Deposit (of North Flank).

The ranges strike east-west, and are the result of the outcrop of the Marra Mamba and Brockman Banded Iron Formation (BIF) units of the Hamersly Basin. North Flank is the Marra Mamba outcrop on the northern limb of the Weeli Wolli anticline, and South Flank is the southern limb of Marra Mamba. Packsaddle is the Brockman unit, stratigraphically above Marra Mamba and located north of North Flank. The Brockman BIF of the southern limb forms Mount Robinson.

Mineralisation is martite-goethite-ocherous goethite enrichment of the Marra Mamba (North and South Flank ranges) and Brockman (Packsaddle range) BIFs.

Much of the Pilbara region has a variable ferricrete/meteoric influenced overprinting zone known as 'Hardcap'. In places the hardcap is quite vuggy, and it is within these vugs that well developed minerals may grow. The best of the samples found to date lie along the hardcapped paleo-surface of the tertiary detrital/bedrock boundary. Some nice specimens have also been collected from within the hardcapped/cemented tertiary detritals.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


7 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Dolomite
Formula: CaMg(CO3)2
Habit: {1011} rhombs
Reference: J M Bennett Collection
Goethite
Formula: α-Fe3+O(OH)
Reference: J M Bennett Collection
'Halloysite'
Formula: Al2(Si2O5)(OH)4
Reference: J M Bennett Collection
Halotrichite
Formula: FeAl2(SO4)4 · 22H2O
Reference: Jason Bennett Collection
Hematite
Formula: Fe2O3
Reference: J M Bennett Collection
Hematite var: Martite
Formula: Fe2O3
Reference: J M Bennett Collection
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: J M Bennett Collection
Opal
Formula: SiO2 · nH2O
Reference: J M Bennett Collection
Opal var: Opal-AN
Formula: SiO2 · nH2O
Reference: J M Bennett Collection
Pyrolusite
Formula: Mn4+O2
Habit: Commonly found as a fine black powder, mammilary or botryoidal crusts, occasionally with sub-millimeter acicular druses perpendicular to these surfaces. Rarely as larger needle splays up to 1cm, or as platy crystals up to 5mm.
Colour: black, silver
Fluorescence: None
Description: Visually identified based on Mn content in whole rock assays, appearance, and black streak.
Reference: J M Bennett Collection
Quartz
Formula: SiO2
Reference: J M Bennett Collection
'Riebeckite Root Name'
Formula: ◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
Habit: Asbestiform
Colour: Blue
Reference: J M Bennett Collection
'Riebeckite Root Name var: Crocidolite'
Formula: ◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
Habit: Asbestiform
Colour: Blue
Reference: J M Bennett Collection
'Tiger's Eye'
Reference: J M Bennett Collection
'Tiger's Eye var: Falcon's Eye'
Reference: J M Bennett Collection
'Turgite'
Reference: J M Bennett Collection

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
var: Martite4.CB.05Fe2O3
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Dolomite5.AB.10CaMg(CO3)2
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Halotrichite7.CB.85FeAl2(SO4)4 · 22H2O
Group 9 - Silicates
'Halloysite'9.ED.10Al2(Si2O5)(OH)4
Unclassified Minerals, Rocks, etc.
'Limonite'-(Fe,O,OH,H2O)
'Riebeckite Root Name'-◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'var: Crocidolite'-◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'Tiger's Eye'-
'var: Falcon's Eye'-
'Turgite'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Pyrolusite4.4.1.4Mn4+O2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AB2(XO4)4·H2O
Halotrichite29.7.3.2FeAl2(SO4)4 · 22H2O
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
'Halloysite'71.1.1.4Al2(Si2O5)(OH)4
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Unclassified Minerals, Mixtures, etc.
Hematite
var: Martite
-Fe2O3
'Limonite'-(Fe,O,OH,H2O)
Opal
var: Opal-AN
-SiO2 · nH2O
'Riebeckite Root Name'-◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'var: Crocidolite'-◻[Na2][Z2+3Fe3+2]Si8O22(OH,F,Cl)2
'Tiger's Eye'-
'var: Falcon's Eye'-
'Turgite'-

List of minerals for each chemical element

HHydrogen
H Riebeckite Root Name (var: Crocidolite)◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
H Riebeckite Root Name◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
H Goethiteα-Fe3+O(OH)
H Limonite(Fe,O,OH,H2O)
H HalloysiteAl2(Si2O5)(OH)4
H Opal (var: Opal-AN)SiO2 · nH2O
H HalotrichiteFeAl2(SO4)4 · 22H2O
H OpalSiO2 · nH2O
CCarbon
C DolomiteCaMg(CO3)2
OOxygen
O PyrolusiteMn4+O2
O Riebeckite Root Name (var: Crocidolite)◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
O Riebeckite Root Name◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
O QuartzSiO2
O Goethiteα-Fe3+O(OH)
O Limonite(Fe,O,OH,H2O)
O DolomiteCaMg(CO3)2
O Hematite (var: Martite)Fe2O3
O HalloysiteAl2(Si2O5)(OH)4
O Opal (var: Opal-AN)SiO2 · nH2O
O HalotrichiteFeAl2(SO4)4 · 22H2O
O HematiteFe2O3
O OpalSiO2 · nH2O
FFluorine
F Riebeckite Root Name (var: Crocidolite)◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
F Riebeckite Root Name◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
NaSodium
Na Riebeckite Root Name (var: Crocidolite)◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Na Riebeckite Root Name◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
MgMagnesium
Mg DolomiteCaMg(CO3)2
AlAluminium
Al HalloysiteAl2(Si2O5)(OH)4
Al HalotrichiteFeAl2(SO4)4 · 22H2O
SiSilicon
Si Riebeckite Root Name (var: Crocidolite)◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Si Riebeckite Root Name◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Si QuartzSiO2
Si HalloysiteAl2(Si2O5)(OH)4
Si Opal (var: Opal-AN)SiO2 · nH2O
Si OpalSiO2 · nH2O
SSulfur
S HalotrichiteFeAl2(SO4)4 · 22H2O
ClChlorine
Cl Riebeckite Root Name (var: Crocidolite)◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Cl Riebeckite Root Name◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
CaCalcium
Ca DolomiteCaMg(CO3)2
MnManganese
Mn PyrolusiteMn4+O2
FeIron
Fe Riebeckite Root Name (var: Crocidolite)◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Fe Riebeckite Root Name◻[Na2][Z32+Fe23+]Si8O22(OH,F,Cl)2
Fe Goethiteα-Fe3+O(OH)
Fe Limonite(Fe,O,OH,H2O)
Fe Hematite (var: Martite)Fe2O3
Fe HalotrichiteFeAl2(SO4)4 · 22H2O
Fe HematiteFe2O3

External Links

http://www.bhpbilliton.com/home/investors/reports/Documents/2013/BHPBillitonAnnualReport2013_Interactive.pdf - BHP Billiton Annual Report 2013

http://dbforms.ga.gov.au/pls/www/geodx.strat_units.sch_full?wher=stratno=2602 - Stratigraphic Information for the Brockman Iron Formation on the Australian Stratigraphic Names Database

http://dbforms.ga.gov.au/pls/www/geodx.strat_units.sch_full?wher=stratno=11353 - Stratigraphic Information for the Marra Mamba Iron Formation on the Australian Stratigraphic Names Database

Other Regions, Features and Areas containing this locality

Australia
Australian PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
 
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