Abstract

Mineral systems are often formed by the processes of fluid flux. Fluids may be sourced from igneous or epithermal events and can be focussed into permeable zones resulting from fracturing of brittle rock. Competent ductile formations and other impervious layers then act as aquatards and depositional sites. Chemical reactions between fluids and host rocks deposit altered mineral assemblages. All of these mineralising processes can leave an expression in the density, sonic velocity or strength of rocks and can hence be detected by the seismic reflection method. Regional scale 2D traverses (100s kilometres) can define major crustal boundaries associated with metalliferous provinces, and also image large faults extending to the mantle which tap into deep, fertile fluids. At the camp scale (10s kilometres) seismic can image anticlines, unconformities and major faults controlling deposition, and can also detect buried intrusions. 2D and 3D seismic surveys at the deposit scale (< 10km) can accurately define the geometry of ore surfaces or key marker reflectors. Offsets and truncations of the ore due to faults and intrusions are also detectable. Large bodies of sulphide ore constitute excellent seismic targets and may be expressed as bright spots along prospective seismic horizons. Interpretation of hard rock seismic is often difficult because of rapidly varying geology, complex faulting and highly variable intrusive geometries. Borehole control with physical property logs is necessary for accurate conversion from time to depth and to constrain interpretations. Vertical seismic profiling is also useful for creating high resolution images around boreholes and analysing the reflectivity of intersected formations.
Google map showing geographic bounding box with values North bound -9.0 East bound 168.0 West bound 96.0 South bound -44.0
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Product Type/Sub Type

dataset - External Publication - Abstract

Constraints

license
Creative Commons Attribution 3.0 Australia Licence

IP Owner

Commonwealth of Australia (Geoscience Australia)

Author(s)

Date (publication)

2012

Product Type

dataset

Topic Category

geoscientificInformation

Keywords

External Publication
Abstract
seismics
Earth Sciences

Resource Language

English

Resource Character Set

utf8

Resource Security Classification

unclassified

Geographic Extent

North bound
-9.0
East bound
168.0
West bound
96.0
South bound
-44.0

Lineage

Unknown

Digital Transfer Options

onLine

DISTRIBUTION Format

pdf

Distributor

Role
distributor
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address

Metadata File Identifier

b8cfa7f7-9ac8-198f-e044-00144fdd4fa6

Metadata Standard Name

ANZLIC Metadata Profile: An Australian/New Zealand Profile of AS/NZS ISO 19115:2005, Geographic information - Metadata

Metadata Standard Version

1.1

Metadata Date Stamp

2012-02-13

METADATA SECURITY CLASSIFICATION

unclassified

Metadata Contact

Role
pointOfContact
Organisation Name
Geoscience Australia
City
Canberra
Administrative Area
ACT
Postal Code
2601
Country
Australia
Email Address
Downloads
For information on acquiring this product,
please contact Geoscience Australia Client Services via:

fax:
+61 2 6249 9960; or
phone:
1800 800 173 (within Australia);
 
+61 2 6249 9966 (outside Australia).