Log in

Relevant bibliographies by topics / Komatiite Western Australia Norseman / Journal articles

Journal articles on the topic 'Komatiite Western Australia Norseman'

To see the other types of publications on this topic, follow the link: Komatiite Western Australia Norseman.

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Komatiite Western Australia Norseman.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Hill, R. E. T., S. J. Barnes, M. J. Gole, and S. E. Dowling. "The volcanology of komatiites as deduced from field relationships in the Norseman-Wiluna greenstone belt, Western Australia." Lithos 34, no. 1-3 (January 1995): 159–88. http://dx.doi.org/10.1016/0024-4937(95)90019-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

BERESFORD, S. W., R. A. F. CAS, D. D. LAMBERT, and W. E. STONE. "Vesicles in thick komatiite lava flows, Kambalda, Western Australia." Journal of the Geological Society 157, no. 1 (January 2000): 11–14. http://dx.doi.org/10.1144/jgs.157.1.11.

Full text

APA, Harvard, Vancouver, ISO, and other styles

3

Hill, R. I., and I. H. Campbell. "Age of granite emplacement in the Norseman region of Western Australia." Australian Journal of Earth Sciences 40, no. 6 (December 1993): 559–74. http://dx.doi.org/10.1080/08120099308728104.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Clarke, Jonathan D. A., Yvonne Bone, and Noel P. James. "Cool-water carbonates in an Eocene palaeoestuary, Norseman Formation, Western Australia." Sedimentary Geology 101, no. 3-4 (February 1996): 213–26. http://dx.doi.org/10.1016/0037-0738(95)00066-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

5

Carpenter, RJ, and M. Pole. "Eocene plant fossils from the Lefroy and Cowan paleodrainages, Western Australia." Australian Systematic Botany 8, no. 6 (1995): 1107. http://dx.doi.org/10.1071/sb9951107.

Full text

Abstract:

Forty-two dispersed cuticle taxa are described from late Middle Eocene drill core samples in the Lefroy and Cowan paleodrainages (Kambalda–Norseman region), Western Australia. They are preserved in fluvial-marginal marine sediments of the Pidinga and Werillup Formations. Thirty-four distinct cuticle taxa occur in the richest sample including Cupressaceae, Araucariaceae (Agathis), Podocarpaceae (Dacrycarpus, Acmopyle, Dacrydium), Cunoniaceae, Lauraceae, Myrtaceae, Casuarinaceae (Gymnostoma), Nothofagus subgenus Lophozonia and tribes Embothrieae, Macadamieae and Banksieae of the Proteaceae. The presence of at least 12 taxa of Proteaceae provides further support for palynological evidence of a rich proteaceous component in Eocene Western Australian assemblages.

APA, Harvard, Vancouver, ISO, and other styles

6

Weinberg, R. "Timing of deformation in the Norseman-Wiluna Belt, Yilgarn Craton, Western Australia." Precambrian Research 120, no. 3-4 (February 10, 2003): 219–39. http://dx.doi.org/10.1016/s0301-9268(02)00142-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

McNaughton, N. J., K. M. Frost, and D. I. Groves. "Ground melting and ocellar komatiites: a lead isotopic study at Kambalda, Western Australia." Geological Magazine 125, no. 3 (May 1988): 285–95. http://dx.doi.org/10.1017/s0016756800010220.

Full text

Abstract:

AbstractStratigraphically and geographically restricted ocellar komatiite flows at Kambalda, Western Australia, appear to represent the products of ground melting of sulphidic sediments by komatiites in lava channels that localized the Fe–Ni–Cu sulphide ores. An immiscible sulphide liquid formed and gravitationally separated from the melted sediment (xenomelt), the resultant buoyant silicate liquid being partly or wholly assimilated by the turbulently convecting komatiite magma. Rarely, the xenomelt gravitationally migrated to the top of flows, and overflowed into the less turbulent lava levees where it collected to form a separate layer overlying a komatiitic layer within a single flow. There was selective preservation of the hybrid felsic layer, as an upper ocellar unit within an ocellar komatiite flow, in lava levees flanking lava channels. The ocellar unit is enriched in elements previously concentrated in the sediments, and shows U–Th–Pb isotopic systematics akin to the underlying sediments. Moreover, the partitioning relationships of U and Pb between the immiscible xenomelt and sulphide liquid enhances the range of U/Pb ratios for components of the ocellar unit, thus allowing sufficient spread of modern uranogenic Pb isotopic ratios to form isochrons, albeit imprecise ones. The range and similarity of model Th/U data from these flows (2.8−3.9) and adjacent sulphidic sediments (2.3−4.4; mostly 2.8−3.9) contrasts with the generally invariable Th/U within Kambalda ultrabasic–basic flows (3.6−3.9), and further supports the ground-melting hypothesis.

APA, Harvard, Vancouver, ISO, and other styles

8

Thomson, B. "Petrology and stratigraphy of some texturally well preserved thin komatiites from Kambalda, Western Australia." Geological Magazine 126, no. 3 (May 1989): 249–61. http://dx.doi.org/10.1017/s0016756800022342.

Full text

Abstract:

AbstractArchaean komatiite volcanics at Kambalda, Western Australia have been metamorphosed to upper greenschist–lower amphibolite grade and have experienced intense though heterogeneously developed polyphase deformation. Despite this, preservation of igneous textural features is often good, particularly in areas which underwent only ‘static style’ metamorphism. Thin lavas from the Tripod Hill Member of the Kambalda Komatiite Formation over the western margin of the Hunt nickel shoot display textural elements and facies variations which are virtually identical to those found in fresher thin komatiite sequences in other Archaean greenstone belts. Four principal flow profile (facies) types are defined, comprising nine subtypes. These represent stages in a facies continuum, ranging from ‘mature’ profiles which comprise thick spinifex textured tops and close packed cumulate bases through to massive, jointed ‘immature’ profiles devoid of mesoscopic spinifex texture. The causes of textural diversity within and between profiles are many and complex. However, facies variations can be attributed mainly to the effects of lava velocity at the time of major heat loss, combined with relative lateral position within any flow. The most mature textural (and geochemical) profiles developed in parts of lavas which had become ponded prior to major heat loss, whereas the least evolved profiles developed along the lateral margins (levees) of moving lavas. The study area komatiites occur as alternating stacks of flows of similar type. This stratigraphy records temporal and spatial shifts in the locus of lava ponding over the western margin of the Hunt nickel shoot. Such shifts may have been caused by irregularities in the underlying volcanic topography and/or by synvolcanic faulting and subsidence.

APA, Harvard, Vancouver, ISO, and other styles

9

Recher, Harry F., and William E. Davis Jr. "Response of birds to a wildfire in the Great Western Woodlands, Western Australia." Pacific Conservation Biology 19, no. 4 (2013): 188. http://dx.doi.org/10.1071/pc130188.

Full text

Abstract:

In December 2005, a wildfire burnt a large area of semi-arid eucalypt woodland along ~10 km of the Norseman- Coolgardie Road north of Norseman in the Great Western Woodlands (GWW), Western Australia. Few birds used the burnt area in the first year after the fire and these were mainly ground and shrub foraging insectivores. There was no influx of seed-eaters or open-country species as reported for post-fire habitats elsewhere in southern Australia. The greatest number of individuals and species of birds occurred in the second year post-fire when ground and shrub vegetation was floristically most diverse. Canopy foragers were attracted to the burnt area in the second year by an outbreak of psyllid insects on seedling eucalypts. At the same time, bark dwelling arthropods associated with the standing stems of fire-killed eucalypts attracted bark-foragers. From the third year, small insectivorous ground, shrub, and canopy foragers dominated the avifauna on the burnt area. These foraged on fire-killed shrubs, as well as living vegetation, including the lignotuberous regrowth of eucalypts. Bark foragers were uncommon after the second year. Throughout the study, the burnt area had fewer species and individuals than adjacent unburnt habitats. Compared with unburnt woodlands there were few differences in how species foraged on the burnt plots, but most species foraged lower reflecting the stature of the vegetation in the burnt woodland. Nectar-feeders, fruit-eaters, large insectivores, raptors, and parrots, although common in the unburnt woodland, were absent or rare in the burnt area. This reflected the limited regrowth of vegetation on the burnt area, which lacked the structural and floristic complexity of nearby unburnt woodlands. Ground foragers probably commenced nesting on the burnt area in the first year, with shrub and canopy foragers nesting from the second year. However, after five years, there was no evidence of large insectivores, nectar-feeders, raptors, seed-eaters, or foliage-eaters (i.e., parrots) nesting despite their abundance in adjacent unburnt woodland. Some of the unburnt woodlands monitored in this study were even-aged regeneration estimated to be 30–50 years post-fire or logging. Regardless of origin, these even-aged plots lacked the diverse avifauna associated with mature woodlands and suggest that post-fire recovery of birds and vegetation in these woodlands is likely to take decades and probably more than 100 years. If so, human activities that increase fire frequency in the GWW, including climate change and fuel-reduction burns, will have long-term adverse impacts on regional biodiversity exceeding those associated with wildfires in less arid forests and woodlands where rates of recovery are more rapid.

APA, Harvard, Vancouver, ISO, and other styles

10

Thomson, B. "B1 subdivisions in thin komatiites at Kambalda, Western Australia." Geological Magazine 126, no. 3 (May 1989): 263–70. http://dx.doi.org/10.1017/s0016756800022354.

Full text

Abstract:

AbstractB1 subdivisions are narrow foliated zones of stubby, skeletal olivine blades, situated at the top of the granular olivine cumulates (B2) in ponded komatiite lavas. They developed at a late stage in pond crystallization as a result of compaction-related circulation of intercumulus liquids through and along the top of the cumulates. The total thickness of a B1 and its degree of blade parallelism are related to lateral position within ponded lavas. The deeper, hotter and longer-lived core regions generated a thick B1 with a high degree of blade parallelism (ordered B1), whereas the shallower, peripheral regions produced a narrow B1 with a poor degree of blade parallelism (disordered B1), or failed to develop one at all.

APA, Harvard, Vancouver, ISO, and other styles

11

Weinberg, Roberto F., Louis Moresi, and Peter van der Borgh. "Erratum to “Timing of deformation in the Norseman-Wiluna Belt, Yilgarn Craton, Western Australia”." Precambrian Research 121, no. 3-4 (March 2003): 293. http://dx.doi.org/10.1016/s0301-9268(03)00040-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Beresford, Steve, Ray Cas, Yann Lahaye, and Mary Jane. "Facies architecture of an Archean komatiite-hosted Ni-sulphide ore deposit, Victor, Kambalda, Western Australia: implications for komatiite lava emplacement." Journal of Volcanology and Geothermal Research 118, no. 1-2 (November 2002): 57–75. http://dx.doi.org/10.1016/s0377-0273(02)00250-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Cowden, Alistair. "Emplacement of komatiite lava flows and associated nickel sulfides at Kambalda, Western Australia." Economic Geology 83, no. 2 (April 1, 1988): 436–42. http://dx.doi.org/10.2113/gsecongeo.83.2.436.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Duuring, P., W. Bleeker, and S. W. Beresford. "Structural Modification of the Komatiite-Associated Harmony Nickel Sulfide Deposit, Leinster, Western Australia." Economic Geology 102, no. 2 (March 1, 2007): 277–97. http://dx.doi.org/10.2113/gsecongeo.102.2.277.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

BARNES, S. J., R. E. T. HILL, and M. J. GOLE. "The Perseverance Ultramafic Complex, Western Australia: The Product of a Komatiite Lava River." Journal of Petrology 29, no. 2 (April 1, 1988): 305–31. http://dx.doi.org/10.1093/petrology/29.2.305.

Full text

APA, Harvard, Vancouver, ISO, and other styles

16

Mamuse, Antony, and Pietro Guj. "Rank statistical analysis of nickel sulphide resources of the Norseman-Wiluna Greenstone Belt, Western Australia." Mineralium Deposita 46, no. 3 (February 8, 2011): 305–18. http://dx.doi.org/10.1007/s00126-011-0333-z.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Williams, David A., Ross C. Kerr, C. Michael Lesher, and Stephen J. Barnes. "Analytical/numerical modeling of komatiite lava emplacement and thermal erosion at Perseverance, Western Australia." Journal of Volcanology and Geothermal Research 110, no. 1-2 (September 2001): 27–55. http://dx.doi.org/10.1016/s0377-0273(01)00206-2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Perring, C. S., S. J. Barnes, and R. E. T. Hill. "The physical volcanology of Archaean komatiite sequences from Forrestania, Southern Cross Province, Western Australia." Lithos 34, no. 1-3 (January 1995): 189–207. http://dx.doi.org/10.1016/0024-4937(95)90021-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

19

Ghaderi, Majid, J. Michael Palin, Ian H. Campbell, and Paul J. Sylvester. "Rare earth element systematics in scheelite from hydrothermal gold deposits in the Kalgoorlie-Norseman region, Western Australia." Economic Geology 94, no. 3 (May 1, 1999): 423–37. http://dx.doi.org/10.2113/gsecongeo.94.3.423.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Barley, Mark E., Burkhard N. Eisenlohr, David I. Groves, Caroline S. Perring, and Julian R. Vearncombe. "Late Archean convergent margin tectonics and gold mineralization: A new look at the Norseman-Wiluna Belt, Western Australia." Geology 17, no. 9 (1989): 826. http://dx.doi.org/10.1130/0091-7613(1989)017<0826:lacmta>2.3.co;2.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Perring, C. S., and N. J. McNaughton. "Geological note: Proterozoic remobilization of ore metals within Archaean gold deposits: Lead isotope evidence from Norseman, Western Australia." Australian Journal of Earth Sciences 37, no. 3 (September 1990): 369–72. http://dx.doi.org/10.1080/08120099008727934.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

Gole, M. J. "Metasomatic interaction between disseminated nickel sulphides and reduced metamorphic fluids, Honeymoon Well komatiite complex, Western Australia." Applied Earth Science 117, no. 3 (September 2008): 112–24. http://dx.doi.org/10.1179/174327508x375611.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Staude, Sebastian, Stephen J. Barnes, and Margaux Le Vaillant. "Thermomechanical erosion of ore-hosting embayments beneath komatiite lava channels: Textural evidence from Kambalda, Western Australia." Ore Geology Reviews 90 (November 2017): 446–64. http://dx.doi.org/10.1016/j.oregeorev.2017.05.001.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Witt, W. K., J. T. Knight, and E. J. Mikucki. "A synmetamorphic lateral fluid flow model for gold mineralization in the Archean southern Kalgoorlie and Norseman terranes, Western Australia." Economic Geology 92, no. 4 (July 1, 1997): 407–37. http://dx.doi.org/10.2113/gsecongeo.92.4.407.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Campbell, I. H., and R. I. Hill. "A two-stage model for the formation of the granite-greenstone terrains of the Kalgoorlie-Norseman area, Western Australia." Earth and Planetary Science Letters 90, no. 1 (September 1988): 11–25. http://dx.doi.org/10.1016/0012-821x(88)90107-0.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Perring, Caroline S., David I. Groves, Jonathan N. Shellabear, and Jack A. Hallberg. "The “porphyry-gold” association in the Norseman-Wiluna Belt of Western Australia: implications for models of Archaean gold metallogeny." Precambrian Research 51, no. 1-4 (June 1991): 85–113. http://dx.doi.org/10.1016/0301-9268(91)90095-r.

Full text

APA, Harvard, Vancouver, ISO, and other styles

27

Spray, John G., and Lyle A. Burgess. "Landsat MSS imagery applied to geological investigation of the Norseman area granitoid–greenstone terrain, southeast Yilgarn Block, Western Australia." Geological Magazine 122, no. 6 (November 1985): 587–94. http://dx.doi.org/10.1017/s0016756800032003.

Full text

Abstract:

AbstractInteractively processed Landsat MSS imagery has been used as an aid to studying the regional geology of approximately 10 800 km2 of terrain at the southeast margin of the Archaean Yilgarn Block in Western Australia. The technique proved successful in extending positions of known lithological contacts and lineaments into poorly exposed, inaccessible areas and in revealing new geological features, especially faults, previously unrecognized at ground level. During this investigation the distribution of granitoids and greenstones was more precisely defined, internal greenstone structures highlighted and three main fault trends were identified: (1) NW–NNW and (2) ENE, both within Archaean shield, and (3) NE–NNE within the transition to adjacent Proterozoic mobile belt. In order for the most information to be extracted from Landsat MSS images it is recommended that, whenever possible, image processing should follow ground-based studies as well as precede them, and that field geologist and Landsat specialist should work at the image processing system together.

APA, Harvard, Vancouver, ISO, and other styles

28

Beresford, S., W. E. Stone, R. Cas, Y. Lahaye, and M. Jane. "Volcanological Controls on the Localization of the Komatiite-Hosted Ni-Cu-(PGE) Coronet Deposit, Kambalda, Western Australia." Economic Geology 100, no. 7 (November 1, 2005): 1457–67. http://dx.doi.org/10.2113/gsecongeo.100.7.1457.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Puchtel, I. S., R. W. Nicklas, J. Slagle, M. Horan, R. J. Walker, E. G. Nisbet, and M. Locmelis. "Early global mantle chemical and isotope heterogeneity revealed by the komatiite-basalt record: The Western Australia connection." Geochimica et Cosmochimica Acta 320 (March 2022): 238–78. http://dx.doi.org/10.1016/j.gca.2021.11.030.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Trofimovs, J., R. A. F. Cas, and B. K. Davis. "An Archaean submarine volcanic debris avalanche deposit, Yilgarn Craton, western Australia, with komatiite, basalt and dacite megablocks." Journal of Volcanology and Geothermal Research 138, no. 1-2 (November 2004): 111–26. http://dx.doi.org/10.1016/j.jvolgeores.2004.06.008.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Seat, Z., W. E. Stone, D. B. Mapleson, and B. C. Daddow. "Tenor variation within komatiite-associated nickel sulphide deposits: insights from the Wannaway Deposit, Widgiemooltha Dome, Western Australia." Mineralogy and Petrology 82, no. 3-4 (July 9, 2004): 317–39. http://dx.doi.org/10.1007/s00710-004-0047-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

32

Carpenter, Raymond J., and Lynne A. Milne. "New species of xeromorphic Banksia (Proteaceae) foliage and Banksia-like pollen from the late Eocene of Western Australia." Australian Journal of Botany 68, no. 3 (2020): 165. http://dx.doi.org/10.1071/bt19110.

Full text

Abstract:

Banksia microphylla leaf fossils and Banksieaeidites zanthus pollen are newly described from late Eocene lignite of the Zanthus-11 borehole, drilled east of Norseman in Western Australia. The leaf fossils are the first known in Banksia to show extreme narrowness (<1.5 mm wide) combined with the xeromorphic trait of margins rolled onto the lower surface so that the diffusely placed stomata are exposed to the outside environment only via grooves on each side of a thick, abaxial midrib. Both this Banksia leaf type and another with encrypted stomata evolved before the widespread initiation of severe climatic aridity in the late Neogene, likely in regions of edaphic infertility and periodic water stress. New interpretations of leaf morphology and foliar evolutionary pathways in Banksia are proposed. Banksia microphylla probably belongs to subgenus Spathulatae, where it strongly resembles many species in the large, wholly Western Australian clade that includes most species in section Oncostylis, series Abietinae. Banksieaeidites zanthus is morphologically consistent with Banksia pollen, and its extremely small size also suggests placement in Spathulatae. The new fossils and other evidence from Zanthus-11 indicate the local presence of quite open, sclerophyll vegetation with conifers, which was unlikely to have been frequently burnt.

APA, Harvard, Vancouver, ISO, and other styles

33

Barnes, S. J. "COTECTIC PRECIPITATION OF OLIVINE AND SULFIDE LIQUID FROM KOMATIITE MAGMA AND THE ORIGIN OF KOMATIITE-HOSTED DISSEMINATED NICKEL SULFIDE MINERALIZATION AT MOUNT KEITH AND YAKABINDIE, WESTERN AUSTRALIA." Economic Geology 102, no. 2 (March 1, 2007): 299–304. http://dx.doi.org/10.2113/gsecongeo.102.2.299.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Cowden, A., M. J. Donaldson, Anthony J. Naldrett, and I. H. Campbell. "Platinum-group elements and gold in the komatiite-hosted Fe-Ni-Cu sulfide deposits at Kambalda, Western Australia." Economic Geology 81, no. 5 (August 1, 1986): 1226–35. http://dx.doi.org/10.2113/gsecongeo.81.5.1226.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Lesher, C. M., and I. H. Campbell. "Geochemical and fluid dynamic modeling of compositional variations in Archean komatiite-hosted nickel sulfide ores in Western Australia." Economic Geology 88, no. 4 (July 1, 1993): 804–16. http://dx.doi.org/10.2113/gsecongeo.88.4.804.

Full text

APA, Harvard, Vancouver, ISO, and other styles

36

Duuring, P., S. G. Hagemann, K. F. Cassidy, and C. A. Johnson. "Hydrothermal Alteration, Ore Fluid Characteristics, and Gold Depositional Processes along a Trondhjemite-Komatiite Contact at Tarmoola, Western Australia." Economic Geology 99, no. 3 (May 1, 2004): 423–51. http://dx.doi.org/10.2113/gsecongeo.99.3.423.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Mueller, Andreas G. "Petrogenesis of amphibole – biotite – calcite – plagioclase alteration and laminated gold – silver quartz veins in four Archean shear zones of the Norseman district, Western Australia." Canadian Journal of Earth Sciences 29, no. 3 (March 1, 1992): 388–417. http://dx.doi.org/10.1139/e92-036.

Full text

Abstract:

The Norseman mining district in the Archean Yilgarn Block, Western Australia, has produced 140 t of gold and about 90 t of silver from 11.24 × 106 t of ore. The district is located within a metamorphic terrane of mafic and minor ultramafic greenstones, intruded by granite cupolas and swarms of porphyry dykes. The orebodies consist of laminated quartz veins, controlled by narrow (0.5–5 m) reverse shear zones that, in general, follow the contacts of metapyroxenite or porphyry dykes. Petrological studies of four shear zones, exposed on the Regent shaft 14 level, Ajax shaft 10 level, and in the stope above the North Royal shaft 5 level, show that the host rocks were metamorphosed to hornblende–plagioclase amphibolites and actinolite–chlorite rocks at temperatures of 500–550 °C prior to mineralization.At the localities studied, intense wall-rock replacement and low-grade (0.5 g/t) gold mineralization are confined to ductile or brittle–ductile shear structures. Alteration is similar in both ultramafic and mafic greenstones, and consists of an inner zone of biotite–quartz–calcite–plagioclase rock with minor actinolitic hornblende and quartz–calcite–actinolite veinlets, and an outer zone, locally developed, of chlorite–calcite–quartz rock. At an estimated pressure of 3 kbar (300 MPa), fluid temperatures during wall-rock alteration are constrained by the hydrothermal mineral assemblages to 480 ± 30 °C in two shear zones on the Regent shaft 14 level, and to 450 ± 20 °C in one shear zone in the North Royal shaft 5 level stope. The mole fraction of CO2 of the fluids is estimated at [Formula: see text], and the sulphur fugacity at 10−6 bar (10−1 kPa) (at 450 °C), based on the assemblage pyrrhotite + pyrite ± arsenopyrite. The development of an outer chloritic alteration zone at North Royal is related to the lower fluid temperature at this locality.High-grade (up to 75 g/t Au, 283 g/t Ag) veins formed within three of the shear zones studied at fluid temperatures of 400 °C and less, by the successive accretion of quartz laminae, separated by films of retrograde chlorite and sericite. The assemblage of ore minerals in the veins differs from that in the altered wall rocks, and includes disseminated galena, Pb–Bi–Ag tellurides, and native gold, which coprecipitated with the quartz. The orebodies at Norseman show affinities to Phanerozoic and Archean gold skarn deposits.

APA, Harvard, Vancouver, ISO, and other styles

38

Witt, W. K., and C. P. Swager. "Structural setting and geochemistry of Archaean I-type granites in the Bardoc-Coolgardie area of the Norseman-Wiluna belt, Western Australia." Precambrian Research 44, no. 3-4 (October 1989): 323–51. http://dx.doi.org/10.1016/0301-9268(89)90051-x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Hill, R. i., I. h. Campbell, and W. Compston. "Age and origin of granitic rocks in the kalgoorlie-norseman region of Western Australia: Implications for the origin of archaean crust." Geochimica et Cosmochimica Acta 53, no. 6 (June 1989): 1259–75. http://dx.doi.org/10.1016/0016-7037(89)90061-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Wright, Ian J., and Pauline Y. Ladiges. "Geographic Variation in Eucalyptus diversifolia (Myrtaceae) and the Recognition of New Subspecies E. diversifolia subsp. hesperia and E. diversifolia subsp. megacarpa." Australian Systematic Botany 10, no. 5 (1997): 651. http://dx.doi.org/10.1071/sb96019.

Full text

Abstract:

Patterns of geographic variation in morphological and chemical characters are documented in Eucalyptus diversifolia Bonpl. (soap mallee, white coastal mallee). This species is found in coastal and subcoastal Australia from southern Western Australia to Cape Nelson (western Victoria), with a number of disjunctions in the intervening region. Morphological data from adult plants collected at field localities and seedlings grown under uniform conditions were analysed using univariate and multivariate methods, including oneway ANOVA, multiple comparison tests, non-metric multidimensional scaling (NMDS), nearest neighbour networks, and minimum spanning trees. Seedling material was tested for isozyme polymorphism, and adult leaf flavonoids were analysed using liquid chromatography. Morphological and chemical characters are also documented in E. aff. diversifolia, a closely related but unnamed taxon restricted to ironstone outcrops near Norseman (WA), and putative E. diversifolia- E. baxteri hybrids from Cape Nelson. Congruent patterns in data sets distinguish three groups of E. diversifolia adults and progeny: (1) those to the west of the Nullarbor disjunction; (2) South Australian populations to the east of this disjunction; and (3) those from Cape Nelson. Formal taxonomic recognition of the three forms at subspecific level is established, namely E. diversifolia subsp. diversifolia, E. diversifolia subsp. hesperia, and E. diversifolia subsp. megacarpa. Patterns of geographic affinity between populations are consistent with a hypothesis of genetic exchange between normally disjunct regional populations of E. diversifolia via coastal land-bridges exposed during periodic times of low sea level since the mid Tertiary.

APA, Harvard, Vancouver, ISO, and other styles

41

Le Vaillant, M., S. J. Barnes, M. L. Fiorentini, J. Miller, T. C. McCuaig, and P. Muccilli. "A Hydrothermal Ni-As-PGE Geochemical Halo Around the Miitel Komatiite-Hosted Nickel Sulfide Deposit, Yilgarn Craton, Western Australia." Economic Geology 110, no. 2 (January 23, 2015): 505–30. http://dx.doi.org/10.2113/econgeo.110.2.505.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Moroni, Marilena, Stefano Caruso, Stephen J. Barnes, and Marco L. Fiorentini. "Primary stratigraphic controls on ore mineral assemblages in the Wannaway komatiite-hosted nickel-sulfide deposit, Kambalda camp, Western Australia." Ore Geology Reviews 90 (November 2017): 634–66. http://dx.doi.org/10.1016/j.oregeorev.2017.05.031.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Schandl, Eva S., and Frederick J. Wicks. "Two stages of CO2 metasomatism at the Munro mine, Munro Township, Ontario: evidence from fluid-inclusion, stable-isotope, and mineralogical studies." Canadian Journal of Earth Sciences 28, no. 5 (May 1, 1991): 721–28. http://dx.doi.org/10.1139/e91-062.

Full text

Abstract:

The Munro asbestos mine is hosted by a differentiated ultramafic sill of Archean age. Localized carbonate alteration at the mine has resulted from two separate episodes of CO2 metasomatism, and the fluids were unrelated. The first episode affected only the serpentinized peridotite and occurred at 250 °C. The fluid was a saline brine (up to 24 wt.% NaCl–CaCl2), and had an oxygen isotopic composition of −3‰, and δ13C was equal to −7.8‰. Calcite veins were emplaced into the overlying, fractured pyroxenite at approximately 300–400 °C during the second episode. The salinity of this fluid was only 1–5 equiv. wt.% NaCl, the oxygen isotopic composition was +7.5‰, and δ13C equaled −3 to −5‰. The first episode was probably associated with burial metamorphism (diagenesis) and the second episode with regional metamorphism. The widespread occurrence of two separate stages of CO2 metasomatism in the Abitibi belt and in other well-documented Archean terranes, such as the Norseman–Wiluna greenstone belt in Western Australia, suggests that this may be an important factor in the tectonic evolution and metamorphic history of Archean greensone belts.

APA, Harvard, Vancouver, ISO, and other styles

44

Staude, Sebastian, and Gregor Markl. "Remnant lenses of komatiitic dykes in Kambalda (Western Australia): Occurrences, textural variations, emplacement model, and implications for other komatiite provinces." Lithos 342-343 (October 2019): 206–22. http://dx.doi.org/10.1016/j.lithos.2019.05.027.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Stone, W. E., M. Heydari, and Z. Seat. "Nickel tenor variations between Archaean komatiite-associated nickel sulphide deposits, Kambalda ore field, Western Australia: the metamorphic modification model revisited." Mineralogy and Petrology 82, no. 3-4 (September 10, 2004): 295–316. http://dx.doi.org/10.1007/s00710-004-0045-5.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Voute, F., and N. Thébaud. "Structural, mineralogical and geochemical constraints on the atypical komatiite-hosted Turret deposit in the Agnew–Mt. White district, Western Australia." Mineralium Deposita 50, no. 6 (December 16, 2014): 697–716. http://dx.doi.org/10.1007/s00126-014-0566-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Mamuse, A., A. Porwal, O. Kreuzer, and S. Beresford. "SPATIAL STATISTICAL ANALYSIS OF THE DISTRIBUTION OF KOMATIITE-HOSTED NICKEL SULFIDE DEPOSITS IN THE KALGOORLIE TERRANE, WESTERN AUSTRALIA: CLUSTERED OR NOT?" Economic Geology 105, no. 1 (January 1, 2010): 229–42. http://dx.doi.org/10.2113/gsecongeo.105.1.229.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Trofimovs, J., M. A. Tait, R. A. F. Cas, A. McArthur, and S. W. Beresford. "Can the role of thermal erosion in strongly deformed komatiite‐Ni–Cu–(PGE) deposits be determined? Perseverance, Agnew‐Wiluna Belt, Western Australia." Australian Journal of Earth Sciences 50, no. 2 (April 2003): 199–214. http://dx.doi.org/10.1046/j.1440-0952.2003.00988.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

49

Barnes, Stephen J., Robin E. T. Hill, and Noreen J. Evans. "Komatiites and nickel sulfide ores of the Black Swan area, Yilgarn Craton, Western Australia. 3: Komatiite geochemistry, and implications for ore forming processes." Mineralium Deposita 39, no. 7 (October 29, 2004): 729–51. http://dx.doi.org/10.1007/s00126-004-0439-7.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Le Vaillant, Margaux, Ahmad Saleem, Stephen J. Barnes, Marco L. Fiorentini, John Miller, Steve Beresford, and Caroline Perring. "Hydrothermal remobilisation around a deformed and remobilised komatiite-hosted Ni-Cu-(PGE) deposit, Sarah’s Find, Agnew Wiluna greenstone belt, Yilgarn Craton, Western Australia." Mineralium Deposita 51, no. 3 (September 8, 2015): 369–88. http://dx.doi.org/10.1007/s00126-015-0610-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!