Cross-Hole Seismic Survey For Mineral Exploration In The West Kimberley Area, Western Australia

1987 ◽  
Vol 18 (1-2) ◽  
pp. 80-83 ◽  
Author(s):  
P. Harman ◽  
L. Leung ◽  
M. Downey
Keyword(s):  
Western Australia ◽  
Mineral Exploration ◽  
Seismic Survey ◽  
The West

Seismic solutions utilizing existing in-mine infrastructure for mineral exploration: A case study from Maseve platinum mine, South Africa

2022 ◽  
Vol 41 (1) ◽  
pp. 54-61
Author(s):  
Moyagabo K. Rapetsoa ◽  
Musa S. D. Manzi ◽  
Mpofana Sihoyiya ◽  
Michael Westgate ◽  
Phumlani Kubeka ◽  
...  
Keyword(s):  
South Africa ◽  
Seismic Data ◽  
Mineral Exploration ◽  
Ground Surface ◽  
Seismic Survey ◽  
Noisy Environment ◽  
Borehole Data ◽  
Passive Seismic ◽  
Below Ground

We demonstrate the application of seismic methods using in-mine infrastructure such as exploration tunnels to image platinum deposits and geologic structures using different acquisition configurations. In 2020, seismic experiments were conducted underground at the Maseve platinum mine in the Bushveld Complex of South Africa. These seismic experiments were part of the Advanced Orebody Knowledge project titled “Developing technologies that will be used to obtain information ahead of the mine face.” In these experiments, we recorded active and passive seismic data using surface nodal arrays and an in-mine seismic land streamer. We focus on analyzing only the in-mine active seismic portion of the survey. The tunnel seismic survey consisted of seven 2D profiles in exploration tunnels, located approximately 550 m below ground surface and a few meters above known platinum deposits. A careful data-processing approach was adopted to enhance high-quality reflections and suppress infrastructure-generated noise. Despite challenges presented by the in-mine noisy environment, we successfully imaged the platinum deposits with the aid of borehole data and geologic models. The results open opportunities to adapt surface-based geophysical instruments to address challenging in-mine environments for mineral exploration.

Breeding biology and movements of Australian sea-lions, Neophoca cinerea, off the west coasst of Western Australia

1992 ◽  
Vol 19 (4) ◽  
pp. 405 ◽  
Author(s):  
NJ Gales ◽  
AJ Cheal ◽  
GJ Pobar ◽  
P Williamson
Keyword(s):  
Breeding Season ◽  
Western Australia ◽  
West Coast ◽  
Metropolitan Region ◽  
Breeding Cycle ◽  
Sea Lion ◽  
The West ◽  
Breeding Sites ◽  
Sea Lions ◽  
Neophoca Cinerea

The Australian sea-lion, Neophoca cinerea, has a 17-18-month breeding cycle on islands off the west coast of Western Australia. Buller, North Fisherman and Beagle Is are the main pupping sites, with several very small colonies (n> 3) at the Abrolhos Is. The 4-5-month pupping seasons are synchronised at North Fisherman and Beagle Is, but the sea-lions from Buller I. breed one month later and those from the Abrolhos Is two months earlier. Pup production and pup mortality were highly variable between seasons over which observations were recorded: 129 pups were born at the main breeding sites in early 1988, the mortality in the first five months was 7.1%, whereas 181 pups were born in late 1989 of which 24.3% died. Pups remain in the vicinity of their natal islands for the first 4-5 months of life before leaving, perhaps on foraging trips, with their mothers. Most return to their natal island, although others haulout on islands up to 27 km away. Some male N. cinerea congregate in bachelor colonies on islands adjacent to the Perth metropolitan region during the non-breeding season and migrate up to 280 km north each breeding season. The status of the isolated, west-coast N. cinerea population is unknown. The current high level of human pressure on sea-lion terrestrial habitats and their food resources indicate a need for further monitoring of this species.

A case history of a cost effective 3D seismic survey over the Perth Basin, Western Australia

1989 ◽  
Vol 20 (2) ◽  
pp. 229
Author(s):  
S.C. Stewart ◽  
B.J. Evans
Keyword(s):  
Western Australia ◽  
Three Dimensional ◽  
Cost Effective ◽  
Cost Comparison ◽  
Seismic Survey ◽  
3D Seismic ◽  
Seismic Surveying ◽  
History Of ◽  
The Cost ◽  
Funded Research Project

As part of an industry funded research project into the application of the technique of LOFOLD3D land seismic surveying, a four fold three dimensional seismic survey was performed in the Perth Basin at Moora, Western Australia in July 1987. The volume covered an area of four kilometres by just under two kilometres, producing a total of 23,000 common midpoint traces. The objective was to collect and process the data in such a manner that a three dimensional structural interpretation would result, which would be the same as that resulting from a conventional three dimensional survey. A cost comparison indicates that a commercial LOFOLD3D survey would reduce the cost of performing a land 3D survey to an estimated 20% of the full fold equivalent, and the technique therefore offers potential for substantial savings if it is adopted on a commercial basis.

THE CHELONIA SEISMIC SURVEY: MINIMISING ENVIRONMENTAL IMPACTS ON A NATURE RESERVE

1992 ◽  
Vol 32 (1) ◽  
pp. 429
Author(s):  
P.J. Long ◽  
V.L. Long
Keyword(s):  
Environmental Management ◽  
Environmental Impacts ◽  
Western Australia ◽  
Nature Reserve ◽  
Management Plan ◽  
Seismic Survey ◽  
Seismic Surveys ◽  
Innovative Methods ◽  
Environmental Management Plan ◽  
Bird Mortality

Onshore seismic surveys are traditionally associated with wide straight tracks, required for access by seismic vehicles and denuded of vegetation. The proposal by Lasmo Oil (Australia) Ltd and its co-venturers to perform a seismic survey on the Muiron Islands Nature Reserve was therefore received with some concern by residents of nearby Exmouth in Western Australia. The proponent undertook extensive surveys of the existing environment, however, and produced a strict environmental management plan which featured innovative methods to minimise impacts on both flora and fauna — in particular the extensive Wedge-tailed Shearwater colony on the islands. These methods were executed much as planned and caused negligible destruction of vegetation and no known bird mortality. The results indicate the management plan was highly successful and established a new benchmark for exploration in sensitive areas.This paper outlines the environmental management plan developed for the work and documents the results of the procedures employed. It concludes that such methods could be applied to similar projects elsewhere.

New phallodrilines (Annelida: Clitellata: Tubificidae) from Western Australian groundwater

Zootaxa ◽  
2006 ◽  
Vol 1304 (1) ◽  
pp. 31 ◽  
Author(s):  
ADRIAN M. PINDER ◽  
S. M. EBERHARD ◽  
WILLIAM F. HUMPHREYS
Keyword(s):  
Southern Hemisphere ◽  
Western Australia ◽  
West Coast ◽  
The State ◽  
Karst Aquifers ◽  
The West ◽  
Western Australian

Four species of phallodriline tubificids (Clitellata: Tubificidae) from karst aquifers and caves along the west coast of the state of Western Australia are the first records of this subfamily from nonmarine waters in the southern hemisphere. Aktedrilus parvithecatus (Erséus 1978) and Pectinodrilus ningaloo n. sp. occur in anchialine groundwater of Cape Range, along with other taxa of marine affinity. Aktedrilus leeuwinensis n. sp. and Aktedrilus podeilema n. sp. occur in caves of the Leeuwin-Naturaliste Ridge and Perth Basin respectively and are the first taxa of marine lineage to have been collected from these systems.

3D VSP migration by image point transform

Geophysics ◽  
2010 ◽  
Vol 75 (3) ◽  
pp. S121-S130 ◽  
Author(s):  
Calin Cosma ◽  
Lucian Balu ◽  
Nicoleta Enescu
Keyword(s):  
Mineral Exploration ◽  
Real Data ◽  
Three Dimensions ◽  
Seismic Survey ◽  
Image Point ◽  
Inverse Transform ◽  
Time Distance ◽  
Diffraction Patterns ◽  
Original Time ◽  
Downhole Measurements

The common characteristic of the seismic methods involving downhole measurements is the difficulty of designing surveys able to image the subsurface space evenly. Migration schemes for these layouts are sensitive to reconstruction artifacts. The defining property of the image point (IP) transform is its ability to accumulate amplitudes of curved reflection events appearing in time-distance profiles into approximately discoidal (or spherical in three dimensions) vicinities in the IP domain. Due to the reflected wavefields collapsing into such vicinities in the IP domain, the emphasizing of the reflectors consists of enhancing regions with higher amounts of accumulated amplitude. True-dip filtering can also easily be performed, even for reflectors appearing in the time-distance profiles as curved events due to their dip, source offset or variable velocity field. Reflecting interfaces aredefined as sets of linked piecewise planar-reflector elements rather than as collections of point diffractors. True reflectors fitting this description are enhanced by the IP transform while diffraction patterns, events produced by other wave types, multiples, and noise of any kind, tend to be suppressed. The inverse transform leads to filtered versions of time-distance profiles. An alternative to performing the inverse transform back to the original time-distance representation is computing 2D/3D migrated images directly from the transformed IP space. Although the 3D migration by IP transform is applicable to any seismic survey geometry, we focused on procedures for enhancing prestack migrated images obtained by sparse multioffset, multiazimuth vertical seismic profiling (VSP) surveys as typically performed for mining site characterization and mineral exploration. The real data used were collected within an extensive mining seismic investigation program performed in Canada.

Indefinite Detention Meets Colonial Dispossession

2017 ◽  
Vol 26 (3) ◽  
pp. 333-358 ◽  
Author(s):  
Harry Blagg ◽  
Tamara Tulich ◽  
Zoe Bush
Keyword(s):  
Western Australia ◽  
Justice System ◽  
Prenatal Alcohol Exposure ◽  
Alcohol Exposure ◽  
Indigenous Communities ◽  
The West ◽  
Indefinite Detention ◽  
History Of ◽  
Law And Justice ◽  
Colonial Settlement

Foetal alcohol spectrum disorder (FASD) is a non-diagnostic umbrella term encompassing a spectrum of disorders caused by prenatal alcohol exposure. This article reports on a qualitative research project undertaken in three Indigenous communities in the West Kimberley region of Western Australia, intended to develop diversionary pathways for Indigenous young people with FASD at risk of enmeshment in the justice system. Rates of FASD in some parts of the West Kimberley are comparable to the highest identified internationally. A diagnosis of FASD amplifies the chances of Indigenous youth being caught up in the justice system in Western Australia, including indefinite detention in prison if found unfit to stand trial. A fresh diversionary paradigm is required. Employing a postcolonial perspective, we explore issues surrounding law and justice intervention – and non-intervention – in the lives of Indigenous children and their families. The FASD problem cannot be uncoupled from the history of colonial settlement and the multiple traumas resulting from dispossession, nor can solving the problem be isolated from the broader task of decolonizing relationships between Indigenous people and the settler mainstream. The decolonizing process involves expanding the role of Indigenous owned and place-based processes and services embedded in Indigenous knowledge.

Seismic reflection profiles across the "Mine Series" in the Noranda camp of the Abitibi belt, eastern Canada

1995 ◽  
Vol 32 (2) ◽  
pp. 167-176 ◽  
Author(s):  
Pierre Verpaelst ◽  
A. Shirley Péloquin ◽  
Erick Adam ◽  
Arthur E. Barnes ◽  
John N. Ludden ◽  
...  
Keyword(s):  
High Resolution ◽  
Seismic Reflection ◽  
Mineral Exploration ◽  
Drill Hole ◽  
Seismic Survey ◽  
Volcanic Complex ◽  
Eastern Canada ◽  
Crustal Layer ◽  
High Resolution Data ◽  
Seismic Reflection Profiles

The Abitibi–Grenville Lithoprobe project completed a regional (line 21) and a high-resolution (line 21-1) seismic survey in the Noranda Central Volcanic Complex of the Blake River Group, Abitibi, Quebec. Line 21 provides a regional framework in which the Archean crust is divided into three layers, two of which are discussed here: the uppermost layer, which corresponds to the Blake River Group, is the least reflective, and lies above 4 s (12 km), and the mid-crustal layer, which is composed of a complex pattern of generally east-northeast-dipping reflectors and lies between 4 and 8 s. Within the regional data, the Mine Series of the Central Volcanic Complex is imaged as a semitransparent series of reflectors overlying a highly reflective east-facing structure interpreted as the subvolcanic Flavrian pluton. The high-resolution data (line 21-1) were collected in the vicinity of the Ansil mine. The seismic images in this region can be controlled by surface geology and extensive drill-hole data, and the project was designed to test the applicability of seismic reflection profiling in providing structural and stratigraphic information for use in mineral exploration: shallow-dipping reflectors correlate well with lithological variations or contacts in the volcanic sequence; strong subhorizontal reflectors correspond to diorite and gabbro dykes and sills; several abrupt lateral changes in the reflectivity coincide with known intrusive contacts such as the Lac Dufault pluton.

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