Cvrd inco, copper cliff, ontario, canada abstract as in the case of the geological models for ni cupge deposits, a wide variety of geophysical signatures of nicupge deposits can. Our exploration license is producing gold nuggets at 30 cm depth using metal detector. An exploration strategy for iocg mineral systems under. Participants at the 2007 geophysics workshop identified a need to have a clearinghouse for small pieces of software that researcheducators have created for their own classes. Iron oxide coppergold iocg permissive tracts in mauritania. Iron oxide coppergold iocg deposits are consequences of lithospheric to depositscale earth processes, and form where there was a coincidence of oreforming processes in space and time. Dec 02, 2015 seismic reflection surveys in search for iron oxide coppergold iocg deposits 1. All iocg deposits are enclosed within regional scalealteration haloes of intensely iron oxidealkalialtered metasomatized rocks and breccias. Jul, 2018 worldclass magmatic ore systems are often characterised by fluidsmelts that are derived from deep lithosphere, mostly located at the margins of ancient craton 1,2,3,4,5,6. Iron oxide coppergold uagcobi iocg deposits and the uraniumrich ones iocg u are economically and strategically attractive exploration targets for canada.
Geophysical signatures of mineral deposits down hole ip surveys for gold exploration western australia research in to the geophysical characteristic of mineral deposits has been a. The carpentaria conductivity anomaly at the eastern margin of the province is a major electrical conductivity structure of the australian continent. Using the example of the precambrian gawler craton south australia, which hosts the giant olympic dam iocg deposit, we integrate geophysical data seismic tomography and magnetotellurics with geological and geochemical data to develop a new interpretation of the. Therefore, spatial data modelling techniques that require training data, like woe and some neural network systems are not appropriate for developing prospectivity. The reader interested in freeware just free of charge software is referred to the list of freeware geophysics software. The lecture was presented at the university of western australian in october 2014 to first year geology students.
Mineral deposits mineral systems and mineralising events. In gold exploration, what is best geophysical methodology or technique to explore primary gold, and establish quartz veins in mica schist bedrock. Iron oxidecoppergold iocg deposits of australia geology. It is simply the most massive mineral system in the world. The latest knowledge on mineral ore genesis and the exploration of ore deposits global demand for metals has risen considerably over the past decade. Theres a myriad of geophysical techniques to confuse the investor, each with different applications. Zonte confirms fertile highly mineralized iocg system at. In exploration, our inhouse experience includes exploration of natural resources of the following deposit types.
Geophysics refers to the measurement of some property of the earth. This is an indirect method for assessing the likelihood of ore deposits or hydrocarbon accumulations. Page seismic reflection surveys in search for iron oxide coppergold iocg deposits okan evans onojasun department of exploration geophysics, curtin university of technology. From regional exploration to reservoir development and production optimization, geophysics is a critical tool to solve the most complex structural and stratigraphic challengesincluding advanced seismic processing, depth imaging, and 3d, 2d, and prestack seismic interpretation as. Depending on software needs of the project, we have capabilities to use qgis, arcgis, mapinfo, maxwell, oasis montaj, r statistics, quickmag, leapfrog, surpac, powerlog, isis, kingdom suite, gmt and vis5d. Mapping deep electrical conductivity structure in the mount.
Mapping deep electrical conductivity structure in the. The worldwide interest in gold that has characterized mineral exploration in the 1980s has had a profound effect on the focus and style of geophysical prospecting. The case of the iron oxide coppergold deposits in the carajas mineral province, brazilian amazon. Aon is going after iocg deposits mammoth resources that could result in the establishment of the next olympic dam. Geology minerals energy and geophysics science center. These methods though apparently effective lack the lateral and depth resolution needed to image deeper mineral deposits for targeted mining, currently limited at about 3. Iocg deposits are hosted by tectonic environments containing significant to voluminous magmatism and source rocks subaerial basalts, sediments, magmas. Iosr journal of applied geology and geophysics iosrjagg. Geophysical signatures of mineral deposits down hole ip. Iocg iron oxide copper gold ore deposits goes with porphyries as they are also loosely associated with a large felsic intrusions and form at moderate depths, unlike the dominantly tertiary porphyries iocg s tend to be much older and are generally protoizoic in age from 1. The lecture was presented at the university of western australian.
Mapping ore deposits the basic geological methods youtube. Ore deposits have formed at various periods over geological time from at least 3500 million years ago to the present day where mineral deposits are forming as part of natural earth processes both on land and on the seafloor. The crustal geophysical signature of a worldclass magmatic. Permissive tracts for iron oxide coppergold deposits in mauritania. The book is in general very comprehensive, although it lacks any description of ironoxidecoppergold iocg deposits, the first of which olympic dam in south australia was discovered in 1976. Geophysical targeting of feoxide cuau deposits west of. Iocg deposits seem to be located along high to lowangle faults that are splays of major, crustalscale faults. The host rocks for iocg deposits are intensely altered. Using the example of the precambrian gawler craton south australia, which hosts the giant olympic dam iocg deposit, we integrate geophysical data seismic tomography and magnetotellurics with geological and geochemical data to develop a new. Airborne gravity gradiometry has proved useful in the search for coal, base metals in ironoxidecoppergold deposits, porphyries, brokenhill type deposits and volcanogenic massive sulphides. Lithospheric architecture and mantle metasomatism linked. Geology, geophysics, and geochemistry science center. Lithospheric architecture and mantle metasomatism linked to.
Geologists are developing new approaches for studying ore deposits and discovering new sources. Most have since been proven, and guilbert and park have been proven correct in their assumptions. Exploration geophysics is an applied branch of geophysics and economic geology, which uses physical methods, such as seismic, gravitational, magnetic, electrical and electromagnetic at the surface of the earth to measure the physical properties of. The deposit type was first recognised, though not named as iocg, by discovery and study of the supergiant olympic dam coppergolduranium deposit olympic dam mine, and south american examples. Exploration geophysics is the practical application of physical methods such as seismic, gravitational, magnetic, electrical and electromagnetic to measure the physical properties of rocks, and in particular, to detect the measurable physical differences between rocks that contain ore deposits or hydrocarbons and those without. Airborne gravity gradiometry in the search for mineral deposits. The magnetic anomalies of iocg deposits are widely variable. The list is split into broad categories, depending on the intended use of the software and its scope of functions. Teach the earth geophysics geophysics software homemade geophysical software. Ironoxidecoppergold iocg, igneous rare earth element ree, and platinum group element pge ore bodies are some of our most important strategic deposits in providing valuable metals that underpin domestic high technology and military industries. Seismic reflection surveys in search for iron oxide coppergold iocg deposits okan evans onojasun department of exploration geophysics, curtin university of technology abstract. The southeast missouri iron metallogenic province contains a remarkable wealth of historically important fe, cu, au, and rare earth element ree deposits including the pea ridge iron oxideapatiterare earth element ioaree deposit and the boss iron oxidecoppergold iocg deposit. In particular, this usage does not restrict iocg to those deposits containing economic concentrations of copper andor gold cf.
Origin, exploration, and exploitation is a compilation of diverse case studies on new prospects in ore deposit geology including. A case for large scale mineral exploration in hard rock. The distribution of mineral deposits is also determined by the timing of ore forming processes. Potential field geophysical methods are traditionally used for iocg exploration.
Seismic reflection method can delineate very complex geological structures hence it might be very. Geochemistry, geophysics, geology, diamond drilling and database. This is a list of free and opensource software for geophysical data processing and interpretation. Geophysical vectors to iocg mineralisation in the gawler. Having high power exploration on board is a sign that the ground holds a lot of potential. Immediately segy data files were imported to radexpro software, geometry was assigned to the. Iosr journal of applied geology and geophysics iosrjagg eissn. Seismic and nonseismic interpretation, from basin to reservoir scale. Aug 07, 20 australias other iocg deposits, ernest henry and mount elliot, are located some 1900km north in the cloncurry district of northern queensland.
Notice that free and opensource requires that the source code is available. Exploration geophysics is also used to map the subsurface structure of a region, to elucidate the underlying structures, spatial distribution of rock units, and to detect structures such as faults, folds and intrusive rocks. Erik is proficient in geological modeling using maptek vulcan and leapfrog geo software with extensive estimation and geostatistical. Geophysical method to explore primary gold geology. Iron oxidecoppergold iocg deposits in south australia and queensland, australia.
Ore deposits have formed at various periods over geological time from at least 3500 million years ago to the present day where mineral deposits are forming as part of. Pdf geophysical signatures of iocg and sedex style. Review of geophysical technology for nicupge deposits. There are generic models to explain the geophysics of iocgs. Simple being free of charge is not sufficientsee gratis versus libre. Since the discovery of the giant olympic dam deposit in australia, feoxide cuau iocg deposits hitzman et al. Pdf airborne gravity gradiometry in the search for. Airborne geophysics data radiometry and magnetometry is another useful tool for porphyry copper and epithermal gold systems exploration. Namibia and zambia have very few publicly documented iocg deposits or prospects. The mount isa province in northern australia is one of the worlds most strongly endowed regions for base metals and host to major ironoxidecoppergold iocg deposits. Iocg prospectivity modelling in namibia and zambia using. Exploration geophysics wikimili, the free encyclopedia. He has worked onsite extensively with projects from initial field evaluation to.
The talks highlights some of the features of the main ore deposit types that you may come across. At the next mining boom this strategic alliance is a simple equation. This browse provides access to the example applications that have been contributed by. Mar 20, 2019 this article was written by snowdens principal consultant, jeremy peters. His experience spans multiple commodities and deposit types including iron ore, porphyry, iocg, industrial minerals, and epithermal deposits. Many diverse ore systems are classified together as iron oxide coppergold locg deposits based on an empirical definition arising primarily from geochemical features that do not specify tectonic setting, geologic environment, or sources of oreforming fluid, metals, or other ore components. A poor understanding of the mechanisms for the formation of this class of deposits combined with the great variability within deposits of this type has precluded the development of an effective exploration model. Probability plots of assay data for modelled elements. The most well known iocg example is olympic dam in australia, operated by bhp. Seismic reflection surveys in search for iron oxide coppergold iocg deposits 1. Seismic reflection surveys in search for iron oxide copper. An exploration strategy for iocg mineral systems under deep cover. Iocg, iron sulfide coppergold, broken hill type bht, sedex, skarn and intrusion related cumo. The cloncurry district is renowned for ironoxide coppergold iocg mineralization, but includes a wide spectrum of deposit styles, including.
Review of geophysical technology for nicupge deposits king, a. The software is characterized by an intuitive interface and face every single geological problem in 2d. Continental scale geophysics integrated approaches to. Geophysics provides excellent vectors to iocg deposits at the terrane and tenement scale but do not provide vectors within the iron oxide alteration envelope. They have significant polymetallic and nuclear energy resources, both of which are seen as nation builders. Matthew hastings is a geologist with 11 years of experience working in exploration and mineral resource definition for precious metals, base metals, iron ore, and rare earth element deposits worldwide. There are similarities between the australian iocg deposits and those in wernecke in the yukon territory, canada. Mineral exploration project initiation exploration. Here is a how series on ore mineral deposit formation acting as a free online exploration geology courses to help nontechnical people understand ore deposits, how they form, how they are explode for, how they are evaluated and mined and how the metals and minerals are extracted from the ore. Iron oxide copper gold iocg deposits are considered to be metasomatic expressions of large crustalscale alteration events driven by intrusive activity.
These deposits are coeval with silicic and intermediate. Oct 25, 2019 the mount isa province in northern australia is one of the worlds most strongly endowed regions for base metals and host to major ironoxidecoppergold iocg deposits. Exploration geophysics is the practical application of physical methods such as seismic, gravitational, magnetic, electrical and electromagnetic to measure the physical properties of rocks, and in particular, to detect the measurable physical differences between rocks. This article was written by snowdens principal consultant, jeremy peters. Porter geoconsultancy, continued its international study tour series of professional development courses during february 20 by visiting a representative selection of the different styles, and the most important examples, of iron oxide coppergold deposits of the gawlercurnamona craton in south australia and the eastern fold belt of the mount isa inlier in nw queensland. From regional exploration to reservoir development and production optimization, geophysics is a critical tool to solve the most complex structural and stratigraphic challengesincluding advanced seismic processing, depth imaging, and 3d, 2d, and prestack seismic interpretation as well as advanced quantitative interpretation. Worldclass magmatic ore systems are often characterised by fluidsmelts that are derived from deep lithosphere, mostly located at the margins of ancient craton 1,2,3,4,5,6. Nov 24, 2019 exploration geophysics is an applied branch of geophysics and economic geology, which uses physical methods, such as seismic, gravitational, magnetic, electrical and electromagnetic at the surface of the earth to measure the physical properties of the subsurface, along with the anomalies in those pr. Alteration vectoring to iocgu deposits in frontier.
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