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Golden Mile Dolerite

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Journal Article
Published: 01 May 2007
Geochemistry: Exploration, Environment, Analysis (2007) 7 (2): 109–127.
...Tansy O'Connor-Parsons; Clifford R. Stanley Abstract The Fimiston Superpit, Kalgoorlie, Western Australia, is the largest gold mine in Australia. The main host to mineralization, the differentiated Golden Mile dolerite (GMD) sill, has undergone several episodes of deformation, metamorphism...
FIGURES | View All (25)
Journal Article
Published: 01 June 1987
The Canadian Mineralogist (1987) 25 (2): 265–273.
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Geology maps of the Golden Mile dolerite. A) Plan view geology map showing the location of the diamond drill hole examined in this study (JUGD011), diamond drill holes from O’Connors-Parsons and Stanley (2007), major structural features, and the location of cross section A-A’. B) Cross section of A-A’ highlighting the two limbs of the Golden Mile dolerite, including the Western and Eastern lode systems, modified after Gauthier et al. (2004) and www.portergeo.com.au. GPF = Golden Pike fault. C) Reconstructed long section after O’Connor-Parsons and Stanley (2007) linking the internal subdivisions of Travis et al. (1971) with the lithological divisions of this study. Note that units 1–3 are grouped, the lower sill contact was not intersected by these drill holes, and ultramafic corresponds only with units 2 and 3 of Travis et al. (1971).
Published: 01 December 2021
Fig. 3. Geology maps of the Golden Mile dolerite. A) Plan view geology map showing the location of the diamond drill hole examined in this study (JUGD011), diamond drill holes from O’Connors-Parsons and Stanley (2007) , major structural features, and the location of cross section A-A’. B) Cross
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Golden Mile dolerite stratigraphy and various lithographic and chemographic parameters that define sharp unit contacts (arrows) or provide general indicators of stratigraphic level. Gradational unit contacts are represented by ‘G’ symbols. Based on these parameters, the original ten units of the Golden Mile dolerite stratigraphy (Travis et al. 1971) have been reclassified into seven distinct units bounded by sharp contacts. (PX, pyroxene; MT, magnetite; ILM, ilmenite; fg, fine-grained; cg, coarse-grained; vcg, very coarse-grained).
Published: 01 May 2007
Fig. 24 Golden Mile dolerite stratigraphy and various lithographic and chemographic parameters that define sharp unit contacts (arrows) or provide general indicators of stratigraphic level. Gradational unit contacts are represented by ‘G’ symbols. Based on these parameters, the original ten units
Journal Article
Journal: Economic Geology
Published: 01 July 1986
Economic Geology (1986) 81 (4): 779–808.
... Goldfields Province of the Yilgarn Block, within a narrow corridor (rift zone) that contains several large gold deposits. Regional metamorphism has produced upper greenschist facies assemblages but has retained original rock textures. At Kalgoorlie, the most important gold host is the Golden Mile Dolerite...
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Schematic cross-sections of the historical units of the Golden Mile dolerite intersected in diamond drill-cores JUGD009 and CTGD008. Units 1 and 10 are not presented; horizontal white intervals in Unit 7 represent cross-cutting mafic pegmatite dykes.
Published: 01 May 2007
Fig. 7 Schematic cross-sections of the historical units of the Golden Mile dolerite intersected in diamond drill-cores JUGD009 and CTGD008. Units 1 and 10 are not presented; horizontal white intervals in Unit 7 represent cross-cutting mafic pegmatite dykes.
Series: Special Publications of the Society of Economic Geologists
Published: 01 January 2020
DOI: 10.5382/SP.23.12
EISBN: 9781629496429
... system. The host stratigraphic sequence, dated at ca. 2710 to 2660 Ma, comprises lower ultramafic and mafic lava flow rocks, and upper felsic to intermediate volcaniclastic, epiclastic, and lava flow rocks intruded by highly differentiated dolerite sills such as the ca. 2685 Ma Golden Mile Dolerite...
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Journal Article
Journal: Economic Geology
Published: 01 August 2015
Economic Geology (2015) 110 (5): 1157–1191.
... Charlotte mine itself. The primary host unit for both mineralization styles is the Golden Mile Dolerite, one of several dolerite intrusions in the mafic-ultramafic volcanic succession of the Kalgoorlie terrane. Along with the large amount of mafic metavolcanics, consistent with typical greenstone belt...
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Representative photographs of the variety of lithofacies observed in the differentiated mafic sills of this study. A) Equigranular dolerite (Golden Mile dolerite, JUGDD011 300 m). B) Thin-section photograph (plane-polarized light) of dolerite showing the interlocking crystals of clinopyroene (now replaced mostly by actinolite) and plagioclase (Condensor dolerite, CD16056 360.1 m). C) Marginal aphyric basalt at upper contact with hosted mudstone (Golden Mile dolerite, JUGDD011 1,178.2 m). D) Quartz dolerite (Golden Mile dolerite, JUGDD011 950 m). E) Thin-section photograph of granophyric texture of quartz dolerite (Golden Mile dolerite, JUGDD011 741.3 m). F) Thin-section photo (plane-polarized light) of finely crystalline basalt near the intrusion center (Golden Mile dolerite 742.6 m). G) Pyroxenite with minor interstitial plagioclase (Condensor dolerite, CD16056 477 m). H) Thin-section photograph (plane-polarized light) of pyroxenite highlighting the abundance of clinopyroxene crystals (now replaced mostly by hornblende) (Golden Mile dolerite, JUGDD011 234 m). I) Plagioclase megacrysts in dolerite (Bombora sill, BRDD0071 339.5). J) Massive peridotite (Bounty Igneous Complex, SEIS-05 1,049-1,048 m). K) Thin-section photograph (cross-polarized light) of peridotite showing olivine crystals poikilitically enclosed by clinopyroxene (Bounty Igneous Complex, SEI-06 241 m). L) Granophyric vein in internal basalt (Golden Mile dolerite, JUGDD011 803 m). Abbreviations: Cpx = clinopyroxene, Fsp = feldspar, Mag = magnetite, Ol = olivine, Pl = plagioclase, Qz = quartz, Srp = serpentine, Tlc = talc.
Published: 01 December 2021
Fig. 7. Representative photographs of the variety of lithofacies observed in the differentiated mafic sills of this study. A) Equigranular dolerite (Golden Mile dolerite, JUGDD011 300 m). B) Thin-section photograph (plane-polarized light) of dolerite showing the interlocking crystals
Journal Article
Journal: Economic Geology
Published: 01 November 1987
Economic Geology (1987) 82 (7): 1661–1678.
... to an anastomosing system of narrow high strain zones (ductile shear zones) and to related tension fractures in the intervening unstrained rock. Virtually all ductile shear zone lode structures occur in the Golden Mile Dolerite because it was essentially mechanically isotropic prior to deformation. It is proposed...
Journal Article
Journal: Economic Geology
Published: 01 January 2010
Economic Geology (2010) 105 (1): 187–227.
.... This giant ore system formed after ca. 2.69 Ga basic magmatism, intrusion of the Golden Mile Dolerite sill at 2680 ± 9 Ma, and intrusion of calc-alkaline feldspar-quartz porphyry dikes at 2670 ± 5 Ma. Gold mineralization was broadly coeval with lamprophyre dike intrusion at 2642 ± 6 Ma and overlapped...
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Field relationships and mineralogy for dikes GmPo 47951 and GmPo 49226. (A) Dike GmPo 47951 hosted by the Golden Mile Dolerite (GMD). The contact between the dike and the dolerite is ENE-striking, subvertical, and transected by the NW-striking, subvertical S2 foliation. (B) Mineralogy of GmPo 47951 shown in a false-colored, scanning electron microscopy-backscattered electron (SEM-BSE) image. (C) View looking to the northwest in the Golden Mile Super Pit illustrating dike GmPo 49226. (D) Mineralogy of GmPo 49226 shown in a false-colored, SEM-BSE image. (E) Close-up view in the Golden Mile Super Pit illustrating dike GmPo 49226 hosted in the Golden Mile Dolerite. The dike comprises a bifurcated set of NNW-striking, steeply WSW-dipping dikes. Abbreviations: Ab/Alb = albite, Ank = ankerite, Ap = apatite, Chl = chlorite, Py = pyrite, Qtz = quartz, Ser = sericite, Ttn = titanite.
Published: 01 June 2022
Fig. 6. Field relationships and mineralogy for dikes GmPo 47951 and GmPo 49226. (A) Dike GmPo 47951 hosted by the Golden Mile Dolerite (GMD). The contact between the dike and the dolerite is ENE-striking, subvertical, and transected by the NW-striking, subvertical S2 foliation. (B) Mineralogy
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Published: 01 March 2004
F ig . 7. Primitive mantle normalized trace element plots of Golden Mile Dolerite. The dolerite from the Golden Mile deposit (a) exhibits stronger alkali enrichment than the dolerite from subeconomic mineralization in drill holes DDH SE-10 and DDH SE-12 (b).
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Cross section of the eastern part of the Golden Mile showing the location of the four sampling traverses modeled in this study (see also Phillips, 1986). The Golden Mile fault forms the eastern margin of the Black Flag beds, which are intruded by porphyritic dikes. Units 1 to 9 make up the Golden Mile Dolerite sill. Unit 1 is a chilled margin, units 2 and 3 are cumulates, and units 4, 5, and 6 are plagioclase-bearing dolerite. Unit 7 is intermediate between the plagioclase-bearing dolerite of unit 6 and unit 8, a coarse-grained, quartz-rich granophyre. Unit 9 is a mineralogically and texturally variable plagioclase-phyric dolerite.
Published: 01 June 2006
up the Golden Mile Dolerite sill. Unit 1 is a chilled margin, units 2 and 3 are cumulates, and units 4, 5, and 6 are plagioclase-bearing dolerite. Unit 7 is intermediate between the plagioclase-bearing dolerite of unit 6 and unit 8, a coarse-grained, quartz-rich granophyre. Unit 9
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Published: 01 March 2004
F ig . 9. Histogram of ((Cs + Rb)/Th) N ratios for samples of the Golden Mile Dolerite from the Golden Mile and drill holes DDH SE-10 and DDH SE-12. Samples proximal to the giant Golden Mile deposit (a) have higher ((Cs + Rb)/Th) N than those associated with the subeconomic gold mineralization
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Fimiston ore samples. a. Sample from the Trafalgar area of the Super Pit (Fig 2a), displaying the three primary stages of the Fimiston event (Clout, 1989): stage 1 is represented by banded calcite/ankerite replacing fragments of the Golden Mile Dolerite (GMD, dark green-black), while stage 2 is present as rims of pyrite ± tourmaline in the altered GMD fragments. The matrix to this breccias sample is quartz (stage 3), which is in part chalcedonic. Sample is 17 cm long, 8 cm wide. b. Polished slab of typical siliceous Fimiston lode containing disseminations of pyrite and tourmaline in highly altered Golden Mile Dolerite. Thin, brecciated carbonate veins are also present. c. Polished mount of OSNACA (Ore Samples Normalized to Average Crustal Abundance) sample 700264, which, while not cut from the rock in (b), was sampled from one very much like it. The rock has abundant pyrite, both as disseminated individual crystals and stringers of fine-grained pyrite. Dots on the various pyrite crystals in the photo are laser analysis craters (for Pb isotopes). Field of view is 2.5 cm. d. Sample 700192, from the OSNACA suite. This rock is a brecciated and silicified piece of Golden Mile dolerite. Fine-grained disseminated pyrite is present throughout, as is brecciated carbonate. Sample width is 5 cm. e. SEM image of a typical Fimiston-stage pyrite crystal, showing fine-scale growth zonation highlighted by changes in chemistry (here related to As content—thin, bright zones in image indicate high [>10,000 ppm] As) and abundant inclusions, in this case tennantite, but in others, native gold and/or gold tellurides are present. Abbreviations: bx carb = brecciated carbonate, py = pyrite, qtz = quartz, tnt = tennantite, tur = tourmaline.
Published: 01 August 2015
Fig. 10 Fimiston ore samples. a. Sample from the Trafalgar area of the Super Pit ( Fig 2a ), displaying the three primary stages of the Fimiston event ( Clout, 1989 ): stage 1 is represented by banded calcite/ankerite replacing fragments of the Golden Mile Dolerite (GMD, dark green-black), while
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(a). Fimiston Western lodes (west of the Golden Mile fault) cut across and are displaced by D2 thrusts. (b). Steep Fimiston Eastern lodes (solid lines east of the Golden Mile fault), abutting against the moderately west dipping Oroya shoot (thick single-dashed line), which is sited at the contact between the Golden Mile Dolerite and the Paringa Basalt. Both the Fimiston lode and the Oroya shoot are cut by steep D3 faults (double-dashed lines). Figures redrawn from Bateman et al. (2001).
Published: 01 November 2005
at the contact between the Golden Mile Dolerite and the Paringa Basalt. Both the Fimiston lode and the Oroya shoot are cut by steep D 3 faults (double-dashed lines). Figures redrawn from Bateman et al. (2001) .
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Secondary ionization mass spectrometry sulfur isotope geochemistry of sulfides. (A) Pyrite sulfur isotope data from the Fimiston, Oroya, and Mt. Charlotte mineralization types as well as synsedimentary pyrite from the Kapai Slate (Godefroy-Rodriquez et al., 2020). Sulfur isotope data from sulfides in the Golden Mile fault zone are shown as the yellow dots. (B) Sulfur isotope data for different sulfide species and structural generations in the Golden Mile fault zone. See text for discussion. Host rocks: DCB = Devon Consols Basalt, GMD = Golden Mile Dolerite, HLS = Hannans Lake Serpentinite, KS = Kapai Slate, LBF = Lower Black Flag, OS = Oroya Shale, PB = Paringa Basalt, QFP = Quartz-Feldspar Porphyry
Published: 01 September 2021
from sulfides in the Golden Mile fault zone are shown as the yellow dots. (B) Sulfur isotope data for different sulfide species and structural generations in the Golden Mile fault zone. See text for discussion. Host rocks: DCB = Devon Consols Basalt, GMD = Golden Mile Dolerite, HLS = Hannans Lake
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Published: 01 January 2000
F ig . 3. Plan of the 29 level, Charlotte Deeps orebody, Mount Charlotte, showing the largest faults of each set, breccia veins, and the boundary between units 8 and 9 of the Golden Mile Dolerite. Thin lines show the underground development as of mid-1993 and outline the orebody.
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Schematic diagram illustrating prospectivity enhancement of mafic sills. Note that the numbers correspond with numbers in text. A) Diagram of the lithosphere indicating: (1) Fe enrichment at the mantle source, (2) enrichment by fractionation within the crust, and (3) enrichment in the shallow crust. B) Detailed diagram of the upper crustal environment highlighting traps where enrichment may occur (green = basaltic lavas, gray = mudstone-siltstone, colorless = differentiated dolerite outline, red = quartz dolerite and granophyric veins, purple = peridotite and pyroxenite). The sill on the right half of the diagram is modeled after Jurassic sills of East Greenland (Eide et al., 2017). BIC = Bounty Igneous Complex, GMD = Golden Mile dolerite.
Published: 01 December 2021
on the right half of the diagram is modeled after Jurassic sills of East Greenland ( Eide et al., 2017 ). BIC = Bounty Igneous Complex, GMD = Golden Mile dolerite.