| Some of the characteristic minerals found in kimberlite are perovskite, magnetite, and spinel. |
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| In the first case diamonds are extracted from the diamantiferous chimneys of the ancient volcanoes, made up of kimberlite, or blue rock. |
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| Unlike kimberlite deposits, which are deep underground, they are quite easy to mine, using artisanal or semi-industrial methods. |
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| More work will be required to determine whether any of the more recent diamondiferous kimberlite discoveries will constitute viable orebodies. |
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| Panda is one of five diamondiferous kimberlite pipes currently scheduled for production at the Ekati diamond mining complex. |
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| The Victor kimberlite is one of 18 pipes discovered on the property, 16 of which are diamondiferous. |
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| Last year program yielded kimberlite indicator minerals as such as kosmochlor diopside, fosterite olivine and G11 pyrope garnet. |
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| The alluvial terraces are exhausted and the future lies in the underlying kimberlite rock. |
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| Omphacite-bearing eclogite nodules are associated with peridotites in the kimberlite pipes of South Africa. |
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| Deposits of kimberlite, the ore in which diamonds are found, have been discovered in five sub-regions of Quebec. |
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| Northern Alberta is host to recently discovered shallow gas reservoirs and kimberlite, the host rock for diamonds. |
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| Are these compounds used in the processing of the kimberlite and if so are they present in the waste streams from the processing operations? |
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| Ashton subsequently reported drilling in the Caribou mountains, but encountered an ironstone unit rather than kimberlite. |
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| Up to 25 000 tonnes of kimberlite will be recovered from the shaft and drifts and will be processed on site to produce this diamond parcel. |
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| The contrast of the magnetic response of a kimberlite pipe with the surrounding rock is dependent of the remanent magnetic field of the pipe. |
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| Till geochemistry reflects the incorporation of kimberlite but the signature can only be traced 6 m down-ice, i.e. it is very local. |
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| This work has been conducted because of the lack of published information on glacial dispersal of kimberlite. |
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| The kimberlite is a multi-phase intrusion which consists of volcaniclastic and hypabyssal kimberlite. |
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| Once the lake water is removed from the segregated area, open pit mining to access the kimberlite ore body will commence. |
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| Detailed till sampling was also undertaken in the Drybones Bay area in view of the presence of the diamondiferous Drybones kimberlite. |
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| Flow sheet design was based on laboratory tests and metallurgical data recorded during the processing of the Renard kimberlite bulk samples. |
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| The A4 property is the best example of a till geochemical signature reflecting kimberlite dispersal. |
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| Diamond is obtained from volcanic pipes composed of kimberlite or lamproite, rocks that are found only in cratons, very old stable areas of the Earth's crust. |
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| Ongoing exploration by BHP, the operator of the project, continues to uncover diamondiferous kimberlite pipes on the property. |
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| Lamproite is also a mantle-derived ultramafic rock that differs from kimberlite in bulk chemistry, being richer in silicon and poorer in aluminum and iron. |
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| Some of the characteristic minerals found in kimberlite are olivine, pyrope garnet, enstatite, diopside, ilmenite, phlogopite, perovskite, magnetite, and spinel. |
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| Till overlying the south end of the pipe is dark green and contains abundant kimberlite clasts and indicator minerals. |
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| The relative abundance of pyrope, Cr-diopside, Mg-ilmenite and chromite varies between the four kimberlite pipes. |
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| The geology of the Victor kimberlite is complex, comprising both crater facies and hypabyssal facies kimberlite. |
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| At depth, some kimberlite breccias grade into root zones of dikes made of unfragmented rock. |
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| The Triple B kimberlite consists of several different phases: hypabyssal kimberlite, dark green fragmental volcaniclastic kimberlite, and its highly altered light green equivalent. |
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| Photo: Polished slab of fresh hypabyssal Peddie kimberlite. |
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| The diamond processing plant has been designed by AMEC with a name plate capacity of 5,000 tonnes of kimberlite per day, or 1.8 million tonnes annually. |
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| Five major kimberlite facies types can be distinguished and it has been shown that many of the 'individual' kimberlites consist of multiple 'stacked' kimberlites emplaced during up to six discrete eruptive episodes. |
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| Knowledge has been gained on the depositional settings in which the kimberlites were emplaced and on the role these sedimentary processes played in reworking the eruptive kimberlite facies and influencing diamond grade. |
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| As the exploration continued through the years, an extremely high concentration of diamond indicators were detected in 1989 in the Lac de Gras area, suggesting the location of a diamondiferous kimberlite pipe. |
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| Very high concentrations of diamond indicator minerals were found in the Lac de Gras area, which suggested the location of a diamondiferous kimberlite pipe. |
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| In Quebec, the Ashton Mining Corporation of Canada and SOQUEM Inc. joint venture reported the discovery of two diamondiferous kimberlite pipes in northcentral Quebec. |
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| With over 69 diamondiferous kimberlite bodies identified, the Fort-à-la-Corne field forms one of the largest diamondiferous clusters in the world. |
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| Of the eight diamondiferous kimberlites found to date on the Gahcho Kué property, the larger 5034, Hearne, and Tuzo kimberlite bodies are currently considered to be potentially economically viable. |
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| Commercial labs will benefit from research into appropriate till size fractions and kimberlite pathfinder elements in till, soil, water and vegetation. |
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| The subcropping surface of the pipe consists of kimberlite breccia and is approximately 250 m by 400 m. The upper 10 m of the pipe has been weathered to a friable and soft, bluish-green clay. |
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| The research team measured the amount of water in mantle xenoliths that had been naturally exhumed from the base of South Africa's Kaapvaal craton during a kimberlite eruption. |
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| Initial core logging of the hole suggests several different phases of kimberlite were intersected including a complex resedimented upper unit and a garnet-rich xenolithic unit further down-hole. |
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| Three of the chromites have mineral chemistries suggesting origin from a diamondiferous kimberlite. |
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| Kimberlite, being relatively soft, was differentially eroded by preglacial weathering and glaciers such that kimberlite pipes subcrop 20 to 50 m below the surrounding bedrock. |
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| Photo: Olivine from the Peddie kimberlite cut and faceted as peridot. |
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| Cr-pyrope, eclogitic garnet, Cr-diopside, Mg-ilmenite, Cr-spinel, and olivine are the most commonly used kimberlite indicator minerals, although in rare cases, diamond is abundant enough to be its own indicator. |
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| Kelyphite reaction rims are present on some pyrope grains transported up to 35 km from source pipes: the presence of kelyphite does not necessarily imply proximity to a kimberlite source. |
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| In the Kirkland Lake and Lake Timiskaming kimberlite field of northeastern Ontario, eskers contain pyrope and kimberlite boulders several km down-ice from kimberlites. |
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| No pyrope garnets were found in Hotish-3, meaning that in such a case, pyropes cannot be used for kimberlite tracing, so other KIM have to be used. |
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| In addition, a TGI 2 project between the Geological Survey of Canada and Saskatchewan focused on studying the complex kimberlite deposits in the province, influencing the region's diamond exploration programs. |
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| There is a very large and somewhat unique kimberlite deposit in that area. |
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| Production of a 1:250,000 scale surficial geology map and a 3D model of shallow gas reservoirs, aggregates and stratigraphic setting of kimberlite dispersal trains. |
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| Detailed geologic studies on selected kimberlite bodies, aided by geophysical techniques, will determine their internal structure, emplacement, postemplacement histories, and controls on diamond grade. |
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| Integration of new and compiled geoscience data in a GIS-format to generate Resource Potential Maps for kimberlite, aggregate, and shallow gas reservoir deposits. |
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| Previously reported partial and preliminary results indicated highly anomalous samples were obtained in the vicinity of known kimberlite pipes. |
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| Fifteen core holes have been completed at the Brauna 3 pipe, totaling 1,768 metres of core, of which 1,083 metres are kimberlite. |
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| In 1991, a prospector panning out stream sediments in Wawa came across kimberlite type grains. |
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| A number of the major diamond mines located around the world are hosted by Type II kimberlite. |
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| This high count is a telltale sign of the presence of kimberlite or ultramafic lamprophyres. |
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| Sudbury Contact reactivated diamond exploration on its properties in the New Liskeard area and is currently conducting a hulk-sampling program on its 92-2 kimberlite pipe. |
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| This program will also evaluate the remainder of the claim block for potential sources of anomalous kimberlite indicator minerals present locally. |
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| These all consist of surface soil samples, taken both from known kimberlite bearing areas and as follow-up testing of several areas based on aeromagnetic results. |
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| The partners announced in late April evidence of a third kimberlite about eight kilometres north of De Beers Canada's proposed Victor diamond mine project near Attawapiskat. |
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| Lamprophyres are of the same geological formation as Kimberlite and Lamproites. |
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| Kimberlite and to a lesser extent lamprophyres host the majority of the worlds known diamond deposits. |
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| The new results are significant in that they show that the Riihivaara Kimberlite sampled a portion of the Earth's mantle that has a high potential to be diamondiferous. |
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