Compositional segregation and solid solution in the lead-dominant alunite-type minerals from Broken Hill, N.S.W.

1996 ◽  
Vol 60 (402) ◽  
pp. 779-785 ◽  
Author(s):  
K. J. Rattray ◽  
M. R. Taylor ◽  
D. J. M. Bevan ◽  
A. Pring
Keyword(s):  
Solid Solution ◽  
Strong Coupling ◽  
New South ◽  
Oscillatory Zoning ◽  
Broken Hill ◽  
Ore Body ◽  
South Wales ◽  
Cell Data ◽  
Unit Cell Data ◽  
Compositional Segregation

AbstractA study of the composition and unit cell data of a suite of lead-rich minerals of the alunite-jarosite group from the oxidized zone of the ore body at Broken Hill, New South Wales, Australia, has revealed almost complete XO4 (X = As, P, S) solid solution in these minerals at this deposit. The species in the group noted are hidalgoite, hinsdalite, beudantite, segnitite and plumbogummite. These minerals at Broken Hill exhibit a number of growth textures, including oscillatory zoning, colloform banding and replacements. Zoning in these minerals is due to the segregation of Al- and Fe-rich members, and compositions indicate a strong coupling of Fe3+ with and Al with

Metamorphic pyroxenes from the Broken Hill district, New South Wales

1962 ◽  
Vol 33 (259) ◽  
pp. 320-338 ◽  
Author(s):  
R. A. Binns
Keyword(s):  
Solid Solution ◽  
Ferrous Iron ◽  
New South ◽  
Regional Metamorphism ◽  
New South Wales ◽  
Metamorphic Grade ◽  
Detectable Change ◽  
Broken Hill ◽  
South Wales ◽  
Hill District

SummaryThe Archean rocks of the Barrier Ranges, New South Wales, show zones of progressive regional metamorphism of which the highest is characterized by orthopyroxene-bearing basic granulites. Within this zone, further increase in metamorphic grade results in a detectable change in distribution of ferrous iron and magnesium between coexisting orthopyroxene and clinopyroxene, the latter becoming relatively richer in iron. Mutual solid solution between the two pyroxene phases also appears to increase. The value of coexisting pyroxenes as indicators of metamorphic grade is thus established. There are some points of disagreement between the Broken Hill results and previously advanced theories of cation distribution in pyroxenes.

Hoganite and paceite, two new acetate minerals from the Potosi mine, Broken Hill, Australia

2002 ◽  
Vol 66 (3) ◽  
pp. 459-464 ◽  
Author(s):  
D. E. Hibbs ◽  
U. Kolitsch ◽  
P. Leverett ◽  
J. L. Sharpe ◽  
P. A. Williams
Keyword(s):  
New South ◽  
New South Wales ◽  
Synthetic Compound ◽  
X Ray ◽  
Broken Hill ◽  
South Wales ◽  
Bluish Green ◽  
Mohs Hardness ◽  
Cell Data ◽  
Simplified Formula

AbstractHoganite, copper(II) acetate monohydrate, and paceite (pronounced ‘pace-ite’), calcium(II) copper(II) tetraacetate hexahydrate, occur as isolated crystals embedded in ferruginous gossan from the Potosi Pit, Broken Hill, New South Wales, Australia. They are associated with goethite, hematite, quartz, linarite, malachite, azurite, cerussite and cuprian smithsonite. Hoganite is bluish green with a pale blue streak and a Mohs hardness of 1½; it possesses perfect {001} and distinct {110} cleavages and has a conchoidal fracture. Chemical analysis of hoganite gave (wt.%) C 23.85; H 3.95; Cu 31.6; Fe 0.4; O (by difference) 40.2, yielding an empirical formula of C4H7.89O5.07Cu1.00Fe0.01. The simplified formula is C4H8O5Cu or Cu(CH3COO)2.H2O, the mineral being identical to the synthetic compound of the same formula. Single-crystal X-ray data for hoganite are: monoclinic, space group C2/c, a = 13.162(3), b = 8.555(2), c = 13.850(3)Å, β = 117.08(3)°, Z = 8. The density, calculated from single-crystal data, is 1.910 g cm−3. The strongest lines in the X-ray powder pattern are [dobs (Iobs) (hkl)] 6.921 (100) (011); 3.532 (28) (202); 6.176 (14) (200); 3.592 (11) (1̄22); 5.382 (10) (2̄11); 2.278 (10) (204); 5.872 (9) (002). Hoganite (orientation presently unknown) is biaxial positive with α = 1.533(2), β = 1.541(3), γ = 1.554(2), 2V(meas.) = 85(5)°, 2V(calc.) = 76.8°, dispersion is r < v, medium (white light); it is strongly pleochroic with X = blue, Y = pale bluish, Z = pale bluish green and absorption X > Y > Z. The mineral is named after Graham P. Hogan of Broken Hill, New South Wales, Australia, a miner and well-known collector of Broken Hill minerals.Paceite is dark blue with a pale blue streak and a Mohs hardness of 1½; it possesses perfect {100} and {110} cleavages and has an uneven fracture. Chemical analysis of paceite gave (wt.%) C 21.25; H 5.3; Ca 9.0; Cu 14.1; O (by difference) 50.35, yielding an empirical formula of C8H23.77O14.23Ca1.02-Cu1.00. The simplified formula is C8H24O14CaCu or CaCu(CH3COO)4.6H2O, the mineral being identical to the synthetic compound of the same formula. Unit-cell data (refined from X-ray powder diffraction data) for paceite are: tetragonal, space group I4/m, a = 11.155(4), c = 16.236(17)Å, Z = 4. The density, calculated from refined cell data, is 1.472 g cm−3. The strongest lines in the X-ray powder pattern are [dobs (Iobs) (hkl)] 7.896 (100) (110); 3.530 (20) (310); 5.586 (15) (200); 8.132 (8) (002); 9.297 (6) (101); 2.497 (4) (420); 3.042 (3) (321). Paceite is uniaxial positive with ω = 1.439(2) and ɛ = 1.482(3) (white light); pleochroism is bluish with a greenish tint (O), pale bluish with a greyish tint (E), and absorption O ⩾ E. The mineral is named after Frank L. Pace of Broken Hill, New South Wales, Australia, an ex-miner and well-known collector of Broken Hill minerals.

Marshite–miersile solid solution and iodargyrite from Broken Hill, New South Wales, Australia

1998 ◽  
Vol 62 (04) ◽  
pp. 471-475 ◽  
Author(s):  
P. W. Millsteed
Keyword(s):  
Solid Solution ◽  
Limit Of Detection ◽  
New South ◽  
Cell Parameters ◽  
Cu Content ◽  
Broken Hill ◽  
South Wales ◽  
Complete Solid Solution ◽  
Vegard’S Law ◽  
End Members

Abstract Microprobe analysis of marshite and miersite from Broken Hill, Australia, demonstrate extensive solid solution between the end-members CuI and AgI, indicating the possibility of a complete solid-solution series. Unit-cell parameters increase from 6.054 Å for marshite to 6.504 Å for miersite, closely following Vegard's Law. The Cu content of iodargyrite is generally below the limit of detection, but one zoned crystal contained 0.28 wt.% Cu. Crystallization of either miersite or iodargyrite at Broken Hill appears to be dependent upon the local availability and ratio of copper, silver and iodine ions.

scholarly journals Broken Hill, New South Wales

Nature ◽  
1924 ◽  
Vol 113 (2845) ◽  
pp. 697-698
Keyword(s):  
New South ◽  
New South Wales ◽  
Broken Hill ◽  
South Wales

Myrmekite and muscovite developed by retrograde metamorphism at Broken Hill, New South Wales

1972 ◽  
Vol 38 (297) ◽  
pp. 570-578 ◽  
Author(s):  
Evan R. Phillips ◽  
D. M. Ransom ◽  
R. H. Vernon
Keyword(s):  
Late Stage ◽  
New South ◽  
New South Wales ◽  
Retrograde Metamorphism ◽  
Broken Hill ◽  
South Wales ◽  
Proportionality Relationship

SummaryRetrograde metamorphism of gneisses and pegmatites leads in part to the destruction of feldspar and its replacement by late-stage lobate myrmekite and muscovite. Reactions promoted by retrogression suggest a range in volume of quartz production that may supplement that developed by exsolution and lead to deviations from the strict proportionality relationship suggested by previous workers. There is no need, however, to propose that quartz in myrmekite originates by constriction of pre-existing quartz within exsolved albite.

Lead and Nd isotopic evidence for a crustal Pb source of the giant Broken Hill Pb–Zn–Ag deposit, New South Wales, Australia

2015 ◽  
Vol 65 ◽  
pp. 228-244
Author(s):  
Massimo Raveggi ◽  
David Giles ◽  
John Foden ◽  
Sebastien Meffre ◽  
Ian Nicholls ◽  
...  
Keyword(s):  
New South ◽  
New South Wales ◽  
Isotopic Evidence ◽  
Broken Hill ◽  
South Wales
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