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Journal articles on the topic 'Geology, Structural New South Wales'

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Published: 10 December 2022
Last updated: 29 January 2023

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1

Wilkins, Colin, and Mike Quayle. "Structural Control of High-Grade Gold Shoots at the Reward Mine, Hill End, New South Wales, Australia." Economic Geology 116, no. 4 (June 1, 2021): 909–35. http://dx.doi.org/10.5382/econgeo.4807.

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Abstract The Reward mine at Hill End hosts structurally controlled orogenic gold mineralization in moderately S plunging, high-grade gold shoots located at the intersection between a late, steeply W dipping reverse fault zone and E-dipping, bedding-parallel, laminated quartz veins (the Paxton’s vein system). The mineralized bedding-parallel veins are contained within the middle Silurian to Middle Devonian age, turbidite-dominated Hill End trough forming part of the Lachlan orogen in New South Wales. The Hill End trough was deformed in the Middle Devonian (Tabberabberan orogeny), forming tight, N-S–trending, macroscopic D2 folds (Hill End anticline) with S2 slaty cleavage and associated bedding-parallel veins. Structural analysis indicates that the D2 flexural-slip folding mechanism formed bedding-parallel movement zones that contained flexural-slip duplexes, bedding-parallel veins, and saddle reefs in the fold hinges. Bedding-parallel veins are concentrated in weak, narrow shale beds between competent sandstones with dip angles up to 70° indicating that the flexural slip along bedding occurred on unfavorably oriented planes until fold lockup. Gold was precipitated during folding, with fluid-flow concentrated along bedding, as fold limbs rotated, and hosted by bedding-parallel veins and associated structures. However, the gold is sporadically developed, often with subeconomic grades, and is associated with quartz, muscovite, chlorite, carbonates, pyrrhotite, and pyrite. East-west shortening of the Hill End trough resumed during the Late Devonian to early Carboniferous (Kanimblan orogeny), producing a series of steeply W dipping reverse faults that crosscut the eastern limb of the Hill End anticline. Where W-dipping reverse faults intersected major E-dipping bedding-parallel veins, gold (now associated with galena and sphalerite) was precipitated in a network of brittle fractures contained within the veins, forming moderately S plunging, high-grade gold shoots. Only where major bedding-parallel veins were intersected, displaced, and fractured by late W-dipping reverse faults is there a potential for localization of high-grade gold shoots (>10 g/t). A revised structural history for the Hill End area not only explains the location of gold shoots in the Reward mine but allows previous geochemical, dating, and isotope studies to be better understood, with the discordant W-dipping reverse faults likely acting as feeder structures introducing gold-bearing fluids sourced within deeply buried Ordovician volcanic units below the Hill End trough. A comparison is made between gold mineralization, structural style, and timing at Hill End in the eastern Lachlan orogen with the gold deposits of Victoria, in the western Lachlan orogen. Structural styles are similar where gold mineralization is formed during folding and reverse faulting during periods of regional east-west shortening. However, at Hill End, flexural-slip folding-related weakly mineralized bedding-parallel veins are reactivated to a lesser degree once folds lock up (cf. the Bendigo zone deposits in Victoria) due to the earlier effects of fold-related flattening and boudinage. The second stage of gold mineralization was formed by an array of crosscutting, steeply W dipping reverse faults fracturing preexisting bedding-parallel veins that developed high-grade gold shoots. Deformation and gold mineralization in the western Lachlan orogen started in the Late Ordovician to middle Silurian Benambran orogeny and continued with more deposits forming in the Bindian (Early Devonian) and Tabberabberan (late Early-Middle Devonian) orogenies. This differs from the Hill End trough in the eastern Lachlan orogen, where deformation and mineralization started in the Tabberabberan orogeny and culminated with the formation of high-grade gold shoots at Hill End during renewed compression in the early Carboniferous Kanimblan orogeny.
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2

McPhie, J. "Evolution of a non-resurgent cauldron: the Late Permian Coombadjha Volcanic Complex, northeastern New South Wales, Australia." Geological Magazine 123, no. 3 (May 1986): 257–77. http://dx.doi.org/10.1017/s0016756800034749.

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AbstractThe Coombadjha Volcanic Complex is the remnant of a Late Permian cauldron. It is part of an extensive sequence of silicic calc-alkaline volcanics that covers the southeastern portion of the New England Orogen in NSW. The Complex is elliptical, measuring 15 × 24 km, and is outlined by a ring pluton and an arcuate fault. Bedding in the volcanic units of the Complex defines a structural basin, with steep inward dips at the monoclinal rim and gentle to horizontal orientations near the centre. An older group of outflow ignimbrites, lavas, breccias and volcaniclastic rocks at least 1500 m thick, is conformably overlain by more than 500 m of texturally homogeneous, crystal-rich, dacitic ignimbrite. Ignimbrites of the older group are the products of several discrete eruptions from separate vents, all of which were situated outside the Coombadjha area. Silicic lava domes with volcaniclastic aprons, and a tuff ring, mark the positions of local vents active on a small scale during intervals between the emplacement of the outflow ignimbrites. No significant subsidence occurred, nor did a caldera exist at this stage. Cauldron subsidence occurred in response to the large magnitude eruption that produced the crystal-rich ignimbrite. The central cauldron block was lowered at least 2000 m by downwarping and fault displacement, and remained largely intact. There is no evidence for resurgent doming of the cauldron after subsidence, although igneous activity continued with intrusion of an adamellite ring pluton along much of the cauldron margin. The crystal-rich ignimbrite and the ring pluton are similar in composition and may have been successive products of a common magma source that sustained this simple, single cauldron cycle.
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3

Indraratna, B., I. Gasson, and R. N. Chowdhury. "Utilization of compacted coal tailings as a structural fill." Canadian Geotechnical Journal 31, no. 5 (October 1, 1994): 614–23. http://dx.doi.org/10.1139/t94-074.

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Detailed laboratory investigations were conducted on coal tailings produced at Westcliff Colliery, New South Wales, Australia. Geotechnical tests were conducted to determine the particle-size distribution, mineralogy, compaction characteristics, compressive strength (California bearing ratio), shear resistance, and collapse potential. The tests show that compacted tailings have good potential as effective fill for embankments, tailings dams, mine access roads, and pavements. Large-scale utilization of these tailings for rehabilitation of subsidence-affected areas and mine backfill is particularly encouraging. It is demonstrated that this waste material can be efficiently compacted to produce acceptable engineering properties over a wide range of water contents. Although the behaviour of one specific type of tailings cannot be generalized to the diverse composition of other coal tailings, the results of this study assist in the interpretation of geotechnical data associated with nonconventional fill. The use of geotextiles in the stabilization of tailings is presented. The effect of moisture content and the number of geotextile layers on the shear strength parameters is investigated, and the influence of geotextiles on the failure modes of triaxial specimens is also discussed. Key words : California bearing ratio, coal tailings, compaction, geotextiles, structural fill, triaxial testing.
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4

Greenhalgh, S. A., M. Suprajitno, and D. W. King. "Shallow seismic reflection investigations of coal in the Sydney Basin." GEOPHYSICS 51, no. 7 (July 1986): 1426–37. http://dx.doi.org/10.1190/1.1442191.

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Surface reflection profiling with the Mini‐SOSIE technique successfully mapped shallow coal seam structure in the western Sydney Basin, New South Wales. Several minor faults and zones of fracturing were detected. In regions of thick Triassic sandstone cover, data quality was poor and unsuitable for geologic interpretation. Synthetic seismograms based on nearby borehole and petrophysical control show excellent agreement with the Mini‐SOSIE sections and illustrate the deleterious filtering effects of coal seams and sequences. To establish a phenomenological basis for seismic wave propagation in shallow coal measures, two vertical seismic profiles (VSPs) which used small explosive charges were recorded with high spatial and temporal sampling. Numerous multiple reflections were observed in the downgoing wave display. The isolated upgoing waves were migrated to yield blurred images of the main coal seams. The subsurface velocity function, also deduced from the VSP, shows broad correlation with the geologic log. The VSP seismograms are not simple because of the combined effects of wave absorption, scattering, and interference. Such problems impede recovery of fine structural detail from seismic data in the shallow environment, particularly when a surface energy source is used.
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5

Khalifa, M. Kh, and K. J. Mills. "SEISMIC STRATIGRAPHIC ANALYSIS AND STRUCTURAL DEVELOPMENT OF AN INTERPRETED UPPER CAMBRIAN TO MIDDLE ORDOVICIAN SEQUENCE IN THE NW BLANTYRE SUB-BASIN, DARLING BASIN (WESTERN NEW SOUTH WALES, AUSTRALIA)." Journal of Petroleum Geology 37, no. 2 (March 25, 2014): 163–81. http://dx.doi.org/10.1111/jpg.12576.

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6

Burrel, Laura, Antonio Teixell, David Gómez-Gras, and Xavier Coll. "Basement-involved thrusting, salt migration and intramontane conglomerates: a case from the Southern Pyrenees." BSGF - Earth Sciences Bulletin 192 (2021): 24. http://dx.doi.org/10.1051/bsgf/2021013.

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The northern margin of the Organyà basin (Southern Pyrenees) has a complex structure in which syn-rift Lower Cretaceous carbonates flank a wide Keuper evaporite province, featuring the leading edges of the basement-involved thrust sheets of the Pyrenean antiformal stack. Recent studies show that Keuper diapirs and salt walls grew during the Cretaceous extensional episode, conditioning the development of differentiated depocenters and minibasins. The role of salt tectonics during the Pyrenean orogeny has not been addressed in previous structural studies, but present-day cross-sections indicate a Keuper evaporite-bearing vertical thickness of up to 3000 m in the Senterada-Gerri de la Sal area. We infer that salt migration was a determinant mechanism in triggering a gentle northward tilting of the Organyà basin during the Eocene-Oligocene, recorded in the La Pobla de Segur and Gurp syn-tectonic conglomerates in a large north-directed onlap, opposite to the main sedimentary influx direction. Contemporaneously, we interpret that salt migration, promoted by conglomerate differential loading, enabled the sinking and rotation of the unrooted Nogueres thrust units (têtes plongeantes). We use new and published structural data for the Lower Cretaceous margin of the Organyà basin, combined with structural and clast provenance data from the Cenozoic alluvial fan conglomerates of La Pobla and Gurp, to understand the Lutetian to late Oligocene evolution of the northern margin of the Central South-Pyrenean Unit. The tectono-sedimentary evolution of this area and the salt evacuation patterns are closely related to the exhumation history of the stacked Paleozoic thrust sheets of the Pyrenean hinterland to the north. In this study, we correlate the movements over a mobile substratum and the paleogeographic changes of conglomeratic basins at the toe of an exhuming orogenic interior.
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7

Branagan, D. F., and H. Pedram. "The Lapstone structural complex, New South Wales." Australian Journal of Earth Sciences 37, no. 1 (March 1990): 23–36. http://dx.doi.org/10.1080/08120099008727902.

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8

Bryant, E. A., and R. W. Young. "Bedrock-Sculpturing by Tsunami, South Coast New South Wales, Australia." Journal of Geology 104, no. 5 (September 1996): 565–82. http://dx.doi.org/10.1086/629852.

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9

Carr, Paul, Malcolm Southwood, and Jeff Chen. "Fluorapatite from Broken Hill, New South Wales, Australia." Rocks & Minerals 97, no. 1 (December 20, 2021): 16–27. http://dx.doi.org/10.1080/00357529.2022.1989948.

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10

WILSON, D., J. R. DAVIES, M. SMITH, and R. A. WATERS. "Structural controls on Upper Palaeozoic sedimentation in south-east Wales." Journal of the Geological Society 145, no. 6 (November 1988): 901–14. http://dx.doi.org/10.1144/gsjgs.145.6.0901.

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11

McIntyre, J. I. "Northwestern New South Wales regional magnetics and gravity." Exploration Geophysics 22, no. 2 (June 1991): 261–64. http://dx.doi.org/10.1071/eg991261.

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12

Greenhalgh, S. A., and D. W. Emerson. "Elastic Properties of Coal Measure Rocks New South Wales." Exploration Geophysics 17, no. 3 (September 1986): 157–63. http://dx.doi.org/10.1071/eg986157.

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13

Birch, William D. "Broken Hill New South Wales, Australia: Its Contribution to Mineralogy." Rocks & Minerals 82, no. 1 (January 2007): 40–49. http://dx.doi.org/10.3200/rmin.82.1.40-49.

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14

Smith, John V. "Textures recording transient porosity in synkinematic quartz veins, South Coast, New South Wales, Australia." Journal of Structural Geology 27, no. 2 (February 2005): 357–70. http://dx.doi.org/10.1016/j.jsg.2004.09.003.

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15

Stubley, M. P. "Structural analysis of the Mystery Bay area, New South Wales." Australian Journal of Earth Sciences 36, no. 4 (December 1989): 479–93. http://dx.doi.org/10.1080/08120098908729505.

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16

Spencer, Ross, and Robert J. Musgrave. "Isostatic and Decompensative Correction of Gravity Data From New South Wales." Exploration Geophysics 37, no. 3 (September 2006): 210–14. http://dx.doi.org/10.1071/eg06210.

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17

Thomas, Barry A., and Christopher J. Cleal. "A new early Westphalian D flora from Aberdulais Falls, South Wales." Proceedings of the Geologists' Association 112, no. 4 (January 2001): 373–77. http://dx.doi.org/10.1016/s0016-7878(01)80016-x.

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18

Rickards, R. B., and A. J. Wright. "Graptolites of the Barnby Hills Shale (Silurian, Ludlow), New South Wales, Australia." Proceedings of the Yorkshire Geological Society 51, no. 3 (May 1997): 209–27. http://dx.doi.org/10.1144/pygs.51.3.209.

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19

Howells, Cindy, and Thomas Kammer. "A new crinoid from the Mississippian (Early Carboniferous) of South Pembrokeshire, Wales." Geological Journal 49, no. 2 (May 21, 2013): 207–12. http://dx.doi.org/10.1002/gj.2514.

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20

Rickards, Barrie, Lawrence Sherwin, and Penelope Williamson. "Gisbornian (Caradoc) graptolites from New South Wales, Australia: systematics, biostratigraphy and evolution." Geological Journal 36, no. 1 (January 2001): 59–86. http://dx.doi.org/10.1002/gj.876.

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21

Graham, Lan T., and Ross E. Pogson. "The Albert Chapman Mineral Collection: Australian Museum, Sydney, New South Wales, Australia." Rocks & Minerals 82, no. 1 (January 2007): 29–39. http://dx.doi.org/10.3200/rmin.82.1.29-39.

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22

Le Gleuher, M. "Olivine wathering in basalts near Cooma, New-South-Wales, Australia." Chemical Geology 84, no. 1-4 (July 1990): 96–97. http://dx.doi.org/10.1016/0009-2541(90)90174-6.

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23

Hendrickx, Marc. "Fibrous Tremolite in Central New South Wales, Australia." Environmental and Engineering Geoscience 26, no. 1 (February 20, 2020): 73–77. http://dx.doi.org/10.2113/eeg-2273.

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ABSTRACT Tremolite schists in Ordovician meta-volcanic units in central New South Wales (NSW) consist of fine fibrous tremolite-actinolite. They host tremolite asbestos occurrences, and small quantities of asbestos were mined from narrow vein deposits in central NSW during the last century. When pulverized, the tremolite schist releases mineral fragments that fall into the classification range for countable mineral fibers and may be classed as asbestos despite not having an asbestiform habit. The ambiguity in classification of this type of natural material raises significant health and safety, legal, and environmental issues that require clarification. While the health effects of amphibole asbestos fibers are well known, the consequences of exposure to non-asbestiform, fibrous varieties is not well studied. This group of elongated mineral particles deserves more attention due to their widespread occurrence in metamorphic rocks in Australia. Toxicological studies are needed to assess the health risks associated with disturbance of these minerals during mining, civil construction, forestry, and farming practices.
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24

Maxwell, Ken. "Preservation of Historic Bridges in New South Wales, Australia." Structural Engineering International 13, no. 2 (May 2003): 133–36. http://dx.doi.org/10.2749/101686603777964829.

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25

Bowyer, J. K. "Basin changes in Jervis Bay, New South Wales: 1894–1988." Marine Geology 105, no. 1-4 (March 1992): 211–24. http://dx.doi.org/10.1016/0025-3227(92)90189-o.

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26

Leslie, Christopher, Leonie Jones, Éva Papp, Kevin Wake-Dyster, Tara J. Deen, and Karsten Gohl. "High-resolution seismic imagery of palaeochannels near West Wyalong, New South Wales." Exploration Geophysics 31, no. 1-2 (March 2000): 383–88. http://dx.doi.org/10.1071/eg00383.

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27

Hart, Barbara F., and Janet Chaseling. "Optimizing Landfill Ground Water Analytes-New South Wales, Australia." Groundwater Monitoring & Remediation 23, no. 2 (May 2003): 111–18. http://dx.doi.org/10.1111/j.1745-6592.2003.tb00677.x.

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28

Parr, Joanna M., Brian P. J. Stevens, Graham R. Carr, and Rodney W. Page. "Subseafloor origin for Broken Hill Pb-Zn-Ag mineralization, New South Wales, Australia." Geology 32, no. 7 (2004): 589. http://dx.doi.org/10.1130/g20358.1.

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29

Fortey, Richard A. "A new deep-water Upper Ordovician (Caradocian) trilobite fauna from south-west Wales." Geological Journal 41, no. 2 (2006): 243–53. http://dx.doi.org/10.1002/gj.1042.

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30

Rheinberger, Mark, and Ernst Holland. "Australian Fossil & Mineral Museum: Home of the Somerville CollectionBathurst, New South Wales." Rocks & Minerals 83, no. 6 (November 2008): 528–33. http://dx.doi.org/10.3200/rmin.83.6.528-533.

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31

Sherwin, L., and B. Rickards. "Rogercooperia, a new genus of Ordovician glossograptid graptolite from southern Scotland and New South Wales, Australia." Scottish Journal of Geology 36, no. 2 (November 2000): 159–64. http://dx.doi.org/10.1144/sjg36020159.

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32

Fergusson, C. L., A. Bray, and P. Hatherly. "Cenozoic Development of the Lapstone Structural Complex, Sydney Basin, New South Wales." Australian Journal of Earth Sciences 58, no. 1 (February 2011): 49–59. http://dx.doi.org/10.1080/08120099.2011.534505.

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33

Hopkins, David, Darrin Bell, Rafael Benites, James Burr, Craig Hamilton, and Rudolph Kotze. "The Pisco (Peru) earthquake of 15 August 2007." Bulletin of the New Zealand Society for Earthquake Engineering 41, no. 3 (September 30, 2008): 109–92. http://dx.doi.org/10.5459/bnzsee.41.3.109-192.

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The Mw 8.0 Pisco earthquake struck at 6.40pm local time with an epicentre offshore about 150 km south of Lima. At least 519 people were killed, and over 1,300 injured. Over 38,000 homes were destroyed and more than 100,000 were made homeless. 14 hospitals were destroyed and many other facilities damaged. The city of Pisco was worst affected with serious damage to the majority of adobe buildings. Other cities and towns nearby suffered similar damage to a lesser extent, depending on the distance from the epicentre. The capital Lima was not seriously affected, although there was some minor damage to buildings. Strong ground motions were felt for over two minutes. In this subduction earthquake a tsunami was generated and affected tens of kilometres of coast. The New Zealand Society for Earthquake Engineering Society (NZSEE) sent a 6-person reconnaissance team to Peru. The team spent three days in Lima meeting with key authorities and four days in the field observing some of the earthquake-affected area. This report describes the team’s observations and comments on the implications for earthquake engineering practice. Highlights of the event in the eyes of the team were: The long duration of the event – over 2 minutes of strong shaking The unique geotechnical context – no rainfall and sandy soils Significant liquefaction damage to roads and buildings Poor performance of adobe construction Generally good performance of reinforced concrete brick infill – but there were major collapses. Good performance of some unreinforced masonry buildings Widespread use of shear walls in major buildings in Lima Engineered structures generally performed well Damage to parts of Pan American Highway due to liquefaction Minimal damage to a major steel mill, designed to international standards Collapse and/or overload of telecom systems for up to four hours following the event, isolating Pisco and Ica Water and waste water systems and storage were seriously affected in Pisco, and significantly in Ica Port St Martin, serving Pisco, was seriously damaged but functional Coordination of overseas / international aid needs careful consideration as part of response planning. Management of response resources is critical. There were significant tsunami effects which were variable in height up to 10 metres. Relatively minor damage to architectural finishes and building services can render hospitals non-functional. Survival of industrial facilities was important in reducing social impact by saving jobs. The best of Peruvian earthquake engineering is international standard. The development of earthquake-resistant standards in schools over the last three decades has paid dividends with modern designs performing well.
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34

Gray, Nigel, Alex Mandyczewsky, and Richard Hine. "Geology of the zoned gold skarn system at Junction Reefs, New South Wales." Economic Geology 90, no. 6 (October 1, 1995): 1533–52. http://dx.doi.org/10.2113/gsecongeo.90.6.1533.

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35

Rickard, M. J., K. G. McQueen, and P. Hayden. "Structural controls on the Cowarra gold deposit near Bredbo, southeastern New South Wales." Australian Journal of Earth Sciences 43, no. 2 (April 1996): 201–15. http://dx.doi.org/10.1080/08120099608728248.

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36

Faiz, M. M., and A. C. Hutton. "COAL SEAM GAS IN THE SOUTHERN SYDNEY BASIN, NEW SOUTH WALES." APPEA Journal 37, no. 1 (1997): 415. http://dx.doi.org/10.1071/aj96025.

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The coal seam gas content of the Late Permian Illawarra Coal Measures ranges from Methane that occurs within the basin was mainly derived as a by-product of coalification. Most of the CO2 was derived from intermittent magmatic activity between the Triassic and the Tertiary. This gas has subsequently migrated, mainly in solution, towards structural highs and accumulated in anticlines and near sealed faults.The total desorbable gas content of the coal seams is mainly related to depth, gas composition and geological structure. At depths
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37

Young, Robert, and Ian McDougall. "Long-Term Landscape Evolution: Early Miocene and Modern Rivers in Southern New South Wales, Australia." Journal of Geology 101, no. 1 (January 1993): 35–49. http://dx.doi.org/10.1086/648195.

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38

Moore, John C., and Rex Glencross-Grant. "Characterising native hardwood timber bridges in New South Wales, Australia." Proceedings of the Institution of Civil Engineers - Construction Materials 171, no. 6 (December 2018): 246–56. http://dx.doi.org/10.1680/jcoma.17.00014.

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39

Mayer, W. "The quest for limestone in colonial New South Wales, 1788–1825." Geological Society, London, Special Publications 287, no. 1 (2007): 325–42. http://dx.doi.org/10.1144/sp287.25.

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40

Nimbs, Matt J., and Stephen D. A. Smith. "An illustrated inventory of the sea slugs of New South Wales, Australia (Gastropoda: Heterobranchia)." Proceedings of the Royal Society of Victoria 128, no. 2 (2016): 44. http://dx.doi.org/10.1071/rs16011.

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Although the Indo-Pacific is the global centre of diversity for the heterobranch sea slugs, their distribution remains, in many places, largely unknown. On the Australian east coast, their diversity decreases from approximately 1000 species in the northern Great Barrier Reef to fewer than 400 in Bass Strait. While occurrence records for some of the more populated sections of the coast are well known, data are patchy for more remote areas. Many species have very short lifecycles, so they can respond rapidly to changes in environmental conditions. The New South Wales coast is a recognised climate change hot-spot and southward shifts in distribution have already been documented for several species. However, thorough documentation of present distributions is an essential prerequisite for identifying further range extensions. While distribution data are available in the public realm, much is also held privately as photographic collections, diaries and logs. This paper consolidates the current occurrence data from both private and public sources as part of a broader study of sea slug distribution in south-eastern Australia and provides an inventory by region. A total of 382 species, 155 genera and 54 families is reported from the mainland coast of New South Wales.
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41

Webster, S. S., and K. Tenison Woods. "Field Trials of Non-Seismic Geophysical Techniques for Petroleum Exploration in New South Wales." Exploration Geophysics 19, no. 1-2 (March 1988): 193–98. http://dx.doi.org/10.1071/eg988193.

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42

Robson, D. F., and R. Spencer. "The New South Wales Government’S Discovery 2000 – Geophysical Surveys and Their Effect on Exploration." Exploration Geophysics 28, no. 1-2 (March 1997): 296–98. http://dx.doi.org/10.1071/eg997296.

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43

Degeling, P. R., L. B. Gilligan, E. Scheibner, and D. W. Suppel. "Metallogeny and tectonic development of the Tasman Fold Belt System in New South Wales." Ore Geology Reviews 1, no. 2-4 (November 1986): 259–313. http://dx.doi.org/10.1016/0169-1368(86)90011-9.

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44

Ishak, A. K., and A. C. Dunlop. "Drainage sampling for uranium in the Torrington district, New South Wales, Australia." Journal of Geochemical Exploration 24, no. 1 (September 1985): 103–19. http://dx.doi.org/10.1016/0375-6742(85)90006-8.

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45

Nutley, David M., Cosmos Coroneos, and James Wheeler. "Potential submerged Aboriginal archaeological sites in South West Arm, Port Hacking, New South Wales, Australia." Geological Society, London, Special Publications 411, no. 1 (September 11, 2014): 265–85. http://dx.doi.org/10.1144/sp411.3.

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46

Dellow, G., M. Yetton, C. Massey, G. Archibald, D. J. A. Barrell, D. Bell, Z. Bruce, et al. "Landslides caused by the 22 February 2011 Christchurch earthquake and management of landslide risk in the immediate aftermath." Bulletin of the New Zealand Society for Earthquake Engineering 44, no. 4 (December 31, 2011): 227–38. http://dx.doi.org/10.5459/bnzsee.44.4.227-238.

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At 12.51 pm (NZST) on 22 February 2011 a shallow, magnitude MW 6.2 earthquake with an epicentre located just south of Christchurch, New Zealand, caused widespread devastation including building collapse, liquefaction and landslides. Throughout the Port Hills of Banks Peninsula on the southern fringes of Christchurch landslide and ground damage caused by the earthquake included rock-fall (both cliff collapse and boulder roll), incipient loess landslides, and retaining wall and fill failures. Four deaths from rock-fall occurred during the mainshock and one during an aftershock later in the afternoon of the 22nd. Hundreds of houses were damaged by rock-falls and landslide-induced ground cracking. Four distinct landslide or ground failure types have been recognised. Firstly, rocks fell from lava outcrops on the Port Hills and rolled and bounced over hundreds of metres damaging houses located on lower slopes and on valley floors. Secondly, over-steepened present-day and former sea-cliffs collapsed catastrophically. Houses were damaged by tension cracks on the slopes above the cliff faces and by debris inundation at the toe of the slopes. Thirdly, incipient movement of landslides in loess, ranging from a few millimetres up to 0.35 metres, occurred at several locations. Again houses were damaged by extension fissuring at the head of these features and compressional movement at the toe. The fourth mode of failure observed was retaining wall and fill failures, including shaking-induced settlement and fill displacement. These failures commonly affected both houses and roads. In the days and weeks immediately following the earthquake a major concern was how to manage the risks from another large aftershock or a long return period rainstorm, in the areas worst affected by landslides, should one occur. Each of the four identified landslide types required a different risk management strategy. The rock-fall and boulder roll hazard was managed by identifying buildings at risk and enforcing mandatory evacuation. In the days immediately following the earthquake this process was based on expert opinion. In the weeks after the earthquake this process was rapidly enhanced with empirical data to confirm the risk. The rock-falls associated with cliff collapse were managed by evacuating properties damaged by extensional ground cracking at the top of the cliffs, adjacent properties, and properties damaged by debris inundation at the toe of the cliffs. The incipient landslide hazard was managed by rapidly deploying movement monitoring technologies to determine if these features were still moving and to monitor their response to on-going aftershock activity. The fill and retaining wall failures were managed by encouraging public reporting of areas of concern for rapid assessment by a geotechnical professional. The success of the landslide risk management strategy was demonstrated by the magnitude MW 6.0 earthquake of 13 June when rock-falls and boulder roll damaged evacuated buildings and ground cracking and debris inundation further damaged evacuated areas. Some incipient landslides reactivated, producing similar movement patterns to the 22 February 2011 earthquake. Several retaining walls identified as dangerous and cordoned off also collapsed. No lives were lost and no serious injuries were reported from landslides in the 13 June 2011 earthquake.
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47

STEVENS, B., R. BARNES, R. BROWN, W. STROUD, and I. WILLIS. "The Willyama Supergroup in the Broken Hill and Euriowie Blocks, New South Wales." Precambrian Research 40-41 (October 1988): 297–327. http://dx.doi.org/10.1016/0301-9268(88)90073-3.

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48

Cope, J. C. W., and A. W. A. Rushton. "Cambrian and early Tremadoc rocks of the Llangynog Inlier, Dyfed, South Wales." Geological Magazine 129, no. 5 (September 1992): 543–52. http://dx.doi.org/10.1017/s0016756800021701.

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AbstractUntil recently no Cambrian rocks were known in the Llangynog area. Detailed mapping has now revealed a succession of ?Lower and Upper Cambrian rocks overlain by Tremadoc rocks. The Allt y Shed Sandstones (new) rest unconformably on the Precambrian, but have yielded no diagnostic fossils and are tentatively assigned to the Comley Series. Succeeding with faulted or unconformable contact is an Upper Cambrian Merioneth Series succession which includes in ascending order: conglomerates, sandstones and siltstones with olenid trilobites and resembling the Treffgarne Bridge Beds of the Haverfordwest area; micaceous shales and siltstones referred to the Ffestiniog Flags Formation; and black mudstones with calcareous concretions and a rich olenid fauna referred to the Dolgellau Formation. Succeeding the latter with possible disconformity is a succession belonging to the lower part of the Tremadoc Series and earlier than any rocks of that series hitherto recorded from the area.
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PHILLIPS, EMRYS. "Progressive deformation of the South Stack and New Harbour Groups, Holy Island, western Anglesey, North Wales." Journal of the Geological Society 148, no. 6 (November 1991): 1091–100. http://dx.doi.org/10.1144/gsjgs.148.6.1091.

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50

Munday, Tim J., Nerida S. Reilly, Mark Glover, Kenneth C. Lawrie, Tenille Scott, Colin J. Chartres, and W. R. (Ray) Evans. "Petrophysical characterisation of parna using ground and downhole geophysics at Marinna, central New South Wales." Exploration Geophysics 31, no. 1-2 (March 2000): 260–66. http://dx.doi.org/10.1071/eg00260.

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