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kimberlite deposits

The fabulously rich diamond deposits at Ekati and Baffin Bay in Canada occur in kimberlites hosted by a thick Archean craton North American craton separated

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Prospectors Guide to Diamonds  Kimberlite
Prospectors Guide to Diamonds Kimberlite

Cross section of ColoradoWyoming kimberlite Kimberlites found to date are primarily diatreme facies with lesser hypabyssal facies Many were initially found based on blue ground exposures vegetation anomalies KIMs mantle nodues an d depressions Others were found by geophysics which led to the discovery of another group of kimberlite in the State Line district that were found with IMPUT

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Kimberlite Pipes What They Are and How Theyre Formed
Kimberlite Pipes What They Are and How Theyre Formed

Kimberlite pipes The role of carbon In the latter case the carbon “ could have literally been carbon that was part of carbonate sediments or animals plants shells whatever that was carried down into the upper mantle of the Earth by the plate tectonics mechanism called subduction” he says

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Kimberlite  Wikipedia
Kimberlite Wikipedia

Kimberlite occurs in the Earths crust in vertical structures known as kimberlite pipes as well as igneous dykes Kimberlite also occurs as horizontal sills Kimberlite pipes are the most important source of mined diamonds today The consensus on kimberlites is that they are formed deep within the mantle Formation occurs at depths between 150 and 450 kilometres potentially from anomalously enriched exotic

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In Search of Diamonds An Introduction to Kimberlite
In Search of Diamonds An Introduction to Kimberlite

Oct 17 2019 · Stage 3 Evaluation The kimberlite sample is sent for a microdiamond analysis diamonds smaller than 05mm in at least two dimensions to determine if it is diamondiferous through a process known as caustic fusion The caustic fusion process is used for processing small samples 500kg of kimberlite material

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Geology Dictionary  Kerogen Kimberlite Kilobar
Geology Dictionary Kerogen Kimberlite Kilobar

Kimberlite A variety of peridotite that is found in volcanic pipes which are thought to be intrusions from the upper mantle Many diamond deposits are found in kimberlite pipes

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Carbon and Kimberlite  HowStuffWorks
Carbon and Kimberlite HowStuffWorks

Kimberlite is a bluish rock that diamond miners look for when seeking out new diamond deposits The surface area of diamondbearing kimberlite pipes ranges from 2 to 146 hectares 5 to 361 acres Diamonds may also be found in river beds which are called alluvial diamond sites These are diamonds that originate in kimberlite pipes but get moved by geological activity

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Kimberlitehosted diamond deposits of southern Africa
Kimberlitehosted diamond deposits of southern Africa

The formation of kimberlitehosted diamond deposits is a longlived and complex series of processes that first involved the growth of diamonds in the mantle and later their removal and transport to the earths surface by kimberlite magmas

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Brazilian Kimberlite Clay  Aquidauana Brazilian Cerrado
Brazilian Kimberlite Clay Aquidauana Brazilian Cerrado

The Brazilian Kimberlite Clay is a company which owns several clay deposits They are considered the most powerful natural active for skin rejuvenation and cosmetic purposes In addition we work on developing partnerships with companies that bring health and wellbeing to the Earth’s population

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Diamond Deposits FAQs  Koidu Limited
Diamond Deposits FAQs Koidu Limited

Diamond deposits are termed primary when diamonds are found in the host igneous or volcanic rocks The host rock types in which significant quantities of diamond can occur include kimberlite and more rarely orangeite and lamproite igneous rocks with similar characteristics to kimberlite Primary diamond deposits occur as intrusions dykes

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US Diamond Mines  Diamond Mining in the United States
US Diamond Mines Diamond Mining in the United States

Wyoming Diamond Deposits California Cherokee Diamond Mine Map A portion of the Geologic Map of Oroville and Table Mountain Chico and Marysville Quadrangles Butte County California produced by the United States Geological Survey The location of the Cherokee Mine is shown in the northeastern corner of the quadrangle

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Major Diamond and Colored Gemstone Deposits Found in
Major Diamond and Colored Gemstone Deposits Found in

Nov 22 2008 · In addition the many known diamondiferous kimberlites lamprophyres in recent years four significant iolite water sapphire deposits were found as well as deposits of ruby sapphire opal kyanite gems jade chromian diopside Cape Emerald pyrope garnet Cape Ruby almandine garnet spessartine garnet peridot gemquality apatite jasper agate onyx and other gems – all found since

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Kimberlitehosted diamond deposits of southern Africa A
Kimberlitehosted diamond deposits of southern Africa A

The formation of kimberlitehosted diamond deposits is a longlived and complex series of processes that first involved the growth of diamonds in the mantle and later their removal and transport to the earths surface by kimberlite magmas Dating of inclusions in diamonds showed that diamond growth occurred several times over geological time

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Kimberlite Pipe Models Significance for Exploration
Kimberlite Pipe Models Significance for Exploration

The lower part of the kimberlite pipe model is derived from the Kimberley area of South Africa where about 1400 1600 m of erosion was interpreted to have occurred Dawson 1971 Hawthorne 1975 ie only the lower portions of the kimberlite pipes where preserved for economic beneficiation and study

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kimberlites  Michigan State University
kimberlites Michigan State University

Considering the combination of the small size of the kimberlite pipes and the fact that nearly all of the Lake Superior region is covered with glacial deposits it is not surprising that the potential source of the diamonds remained unknown for many years

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Kimberlites The only volcanic deposits that we know are
Kimberlites The only volcanic deposits that we know are

Volcanoes Kimberlites The only volcanic deposits that we know are from the deep mantle of Earth A rock that is the source of most of the world’s diamond deposits is

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Kimberlite Oilfield Research│Woodlands TX
Kimberlite Oilfield Research│Woodlands TX

Kimberlite pipes are the most important source of mined diamonds today The diamond laden deposits occurring at Kimberly South Africa were the first recognized discovery and became the source of the name The K shape inside of Kimberlite’s diamond shaped logo represents mine shafts tunneled through dense rock to access a rare and valuable

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Kimberlitehosted diamond deposits of southern Africa A
Kimberlitehosted diamond deposits of southern Africa A

Mine A kimberlite deposit that has seen sustained mining for a continuous period of at least 2 years Deposits meeting this criterion are shown in Fig 1 Large and small mines This is a difficult concept to quantify as it does not necessarily represent diamond grade diamond quality or the size or value of the mineral resource or reserve

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Brazilian Kimberlite Clay  Aquidauana Brazilian Cerrado
Brazilian Kimberlite Clay Aquidauana Brazilian Cerrado

The Brazilian Kimberlite Clay is a company which owns several clay deposits They are considered the most powerful natural active for skin rejuvenation and cosmetic purposes In addition we work on developing partnerships with companies that bring health and wellbeing to the Earth’s population

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kimberlites  Michigan State University
kimberlites Michigan State University

Because these and the several other diamonds discovered in the Lake Superior region have come from glacial deposits there has been much speculation on the source of the diamonds Diamonds are very rare and originate in distinctive rocks known as kimberlites Kimberlites originate deep within the earth’s mantle and are brought to the surface in violent gascharged eruptions

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HANDBOOK ON KIMBERLITE EXPLORATION AND MINING
HANDBOOK ON KIMBERLITE EXPLORATION AND MINING

Diamond deposits can be classified as primary kimberlites and lamproites and secondary alluvial and marine In 1995 their relative production contributions in South Africa were primary kimberlite 863 million carats 89 of total alluvial 960000 carats 10 and marine 90000 carats 1

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Diamond Deposits FAQs  Koidu Limited
Diamond Deposits FAQs Koidu Limited

Diamond deposits are termed primary when diamonds are found in the host igneous or volcanic rocks The host rock types in which significant quantities of diamond can occur include kimberlite and more rarely orangeite and lamproite igneous rocks with similar characteristics to kimberlite

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The potential for diamondbearing kimberlite in northern
The potential for diamondbearing kimberlite in northern

Between 1876 and 1913 diamonds were found in at least seven localities in southern and central Wisconsin All were found in Pleistocene glacial deposits or Holocene river gravel The bedrock kimberlite source for the diamonds is unknown but has been presumed to be in northern Canada the only area north of Wisconsin previously known to contain kimberlites

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Kimberlites in Alaska  AMDS Adventure Forum
Kimberlites in Alaska AMDS Adventure Forum

Sep 09 2012 · Geophysics is used to find KimberliteLamporite targets Unfortunately most of the targets are only GOLD deposits AMDS Adventure Forum AMDS Prospecting Forum Kimberlites in Alaska Results 1 to 2 of 2 Threaded Mode Threaded View 09092012 0558 PM 1 geowizard Guest Kimberlites in Alaska Geophysics is used to find Kimberlite

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Kimberlites The only volcanic deposits we know to have
Kimberlites The only volcanic deposits we know to have

Sep 26 2019 · They are the only volcanic deposits we know to have come from Earths deep mantle and they provide a fascinating glimpse into our planets formation Kimberlite eruptions have never been

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Recent Advances in Understanding the Geology of Diamonds
Recent Advances in Understanding the Geology of Diamonds

The richness of the alluvial deposits of the Vaal and Orange Rivers of South Africa eventually led to the discovery of kimberlite and the famous workings around Kimberley establishing kimberlite as the primary volcanic host of diamonds

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Kimberlite diamond deposits  Request PDF
Kimberlite diamond deposits Request PDF

Kimberlite diamond deposits Understanding the range of transport styles recorded by kimberlite deposits is key to describing the type and style of eruptions Building a clear picture of the

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Kimberlite  rock  Britannica
Kimberlite rock Britannica

Kimberlite a darkcoloured heavy often altered and brecciated fragmented intrusive igneous rock that contains diamonds in its rock matrix It has a porphyritic texture with large often rounded crystals phenocrysts surrounded by a finegrained matrix groundmass It is a mica peridotite

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