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kimberlite and lamproite host rocks for diamond

  • RECONNAISSANCE SAMPLING FOR DIAMOND

    of eastern Canada and is host to numerous occurrences of diamond-bearing kimberlite and other associated rocks (e g lamproite) that have arisen from deep within the lithosphere (vanRythovern et al 2011) Recent exploration in the Supe-rior Craton has led to

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  • DIAMONDS KIMBERLITES AND LAMPROITES

    Keywords: diamond kimberlite lamproite gems industrial minerals Contents 1 Introduction 2 Kimberlites and Lamproites 3 Distribution of Diamond Deposits and World Production 4 The Origin of Diamond 5 Factors of Diamond Potential 6 Exploration and

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  • DIAMONDS KIMBERLITES AND LAMPROITES

    Keywords: diamond kimberlite lamproite gems industrial minerals Contents 1 Introduction 2 Kimberlites and Lamproites 3 Distribution of Diamond Deposits and World Production 4 The Origin of Diamond 5 Factors of Diamond Potential 6 Exploration and

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  • Diamonds—Evidence of Explosive Geological Processes

    Diamond deposits are termed primary when found in the host rocks that have brought them from deep in the earth's interior to the surface The two host rock types in which significant quantities of diamond occur are called kimberlite (named after the best-known and earliest-mined diamond deposits at Kimberley in South Africa) and lamproite

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  • Guide for Drift Prospecting for Diamonds

    The second chapter discusses the host materials for diamond Kimberlite and lamproite are the most econom-ically important host rocks for diamond and are considered to be "primary" hosts Alluvial or placer diamond deposits are considered "secondary" hosts

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  • Kimberlites and Lamproites: Primary Sources of Diamond

    many rocks belonging to different pe- trological clans are petrographically similar Identification of a rock as kimberlite or lamproite does not guarantee that that it will contain economic amounts of diamond There are two reasons for this observation Firstly it

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  • Department for Energy and Mining

    Both kimberlite and lamproite belong to a broader category of igneous rocks called lamprophyres It must be noted that not all kimberlite and lamproite bodies contain diamonds Diamonds are also found in placer deposits some distance from the eroded kimberlitic source rocks

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  • Prospector's Guide to Diamonds

    Kimberlite is just one of several rock types found at the earth's surface that sometimes contains diamonds More than 40 kimberlites were initially mapped in the Colorado-Wyoming State Line district (1) this was followed by mapping of a small kimberlite blow in the Sheep Rock district (2) a major dike-blow complex in the Iron Mountain district (3) and the mapping of a major lamproite

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  • How We Find Diamond Sources: Kimberlite and Lamproite

    We have already described how diamonds are brought to the surface of the Earth in kimberlite and lamproite pipes and that these volcanic events occur within continental cratons where the conditions exist to help diamonds maintain stability on their journey to the

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  • Kimberlites: Earth's Diamond Delivery System

    2019/5/15Subsequently geoscientists obtained pressure and temperature constraints for diamond formation (from diamond host rocks and their mineral inclusions) bolstering the high-pressure origin for natural diamonds (e g Bundy et al 1961 Mitchell and Crocket

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  • Diamonds in the Rough

    The classification of diamond crystals based on peridotitic (P-type) and eclogitic (E-type) host source rocks is also reflected in the carbon isotopic composition of the diamond Carbon has isotopic characteristics that can guide us in determining the source of the carbon and as such provide some insight into how the diamond and its source rock formed

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  • Kimberlites and lamproites: Criteria for similarity and

    2011/1/16Precisely these types of kimberlites host diamond deposits including economic grade objects in EEP The lamproite sources were localized only in the enriched mantle (EMI and EMII) At the same time these rocks share some similarities primarily with respect to their genesis and classification

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  • Diamonds in Colorado! The Stateline Kimberlite District

    Diamonds in Colorado! The State Line Kimberlite District Colorado Wyoming USA While small compared to the great diamond-bearing kimberlite pipes of the African continent or more recent discoveries in northern Canada Colorado is nonetheless endowed with a relatively substantial kimberlite district many of which contain diamonds

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  • Lamproite

    2011/4/4Almost all is derived from kimberlite or its weathered remnants but Australian production is from the Argyle mine at which the host rock is lamproite Kimberlites are olivine- and volatile-rich potassic ultrabasic rocks of variable geological age that typically form near-vertical carrot-shaped "pipes" intruded into Archean cratons

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  • How We Find Diamond Sources: Kimberlite and Lamproite

    2016/8/3Diamond industrialist Ehud Arye Laniado is a man passionate about diamonds From his early 20s in Africa and later in Belgium honing his expertise in forecasting the value of polished diamonds by examining rough diamonds by hand till today four decades later

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  • How We Find Diamond Sources: Kimberlite and

    Diamond industrialist Ehud Arye Laniado is a man passionate about diamonds From his early 20s in Africa and later in Belgium honing his expertise in forecasting the value of polished diamonds by examining rough diamonds by hand till today four decades later

    Get Price
  • CHAPTER EXPLORATION FOR DIAMOND BEARING ROCKS

    III 1 Diamond-Host rocks: Diamonds are found in different environments and in a variety of rock types ranging from Archaean to Quaternary These include igneous rocks like kimberlites lamproites orangites (Mitchell 1986) and sedimentary rocks

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  • Diamonds—Evidence of Explosive Geological Processes

    Diamond deposits are termed primary when found in the host rocks that have brought them from deep in the earth's interior to the surface The two host rock types in which significant quantities of diamond occur are called kimberlite (named after the best-known and earliest-mined diamond deposits at Kimberley in South Africa) and lamproite

    Get Price
  • Department for Energy and Mining

    Both kimberlite and lamproite belong to a broader category of igneous rocks called lamprophyres It must be noted that not all kimberlite and lamproite bodies contain diamonds Diamonds are also found in placer deposits some distance from the eroded kimberlitic source rocks

    Get Price
  • Kimberlite Deposits and Geology Formation of Diamonds

    The geology of Diamonds consist of crystalline carbon although a significant proportion of diamonds are derived from placid deposits i e hosted in sediments placid's are secondary deposits and all diamonds were at one time or another hosted by kimberlite igneous rocks The name Kimberlite comes from the town of Kimberley which grew up around the prolific diamond mines in northern South

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  • GemHunter's Guide to Diamonds and Their Mineralogy

    A blog about how to find diamond deposits where to find rough diamonds and finally how to identify rough diamonds and their host rocks (i e kimberlite lamproite and lamprophyre) Some rare diamonds are worth many times that of any other gemstone and gold

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  • Prospecting for Diamond Deposits

    Because very high grade diamond ores have been detected in some of these unconventional commercial host rocks are anticipated to be found in the future (Erlich and Hausel 2002) Presently diamond exploration programs are designed to search for conventional host rocks (i e kimberlite and lamproite) or for placers presumably derived from these

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  • Prospecting for Diamond Deposits

    Because very high grade diamond ores have been detected in some of these unconventional commercial host rocks are anticipated to be found in the future (Erlich and Hausel 2002) Presently diamond exploration programs are designed to search for conventional host rocks (i e kimberlite and lamproite) or for placers presumably derived from these

    Get Price
  • How We Find Diamond Sources: Kimberlite and Lamproite

    We have already described how diamonds are brought to the surface of the Earth in kimberlite and lamproite pipes and that these volcanic events occur within continental cratons where the conditions exist to help diamonds maintain stability on their journey to the

    Get Price
  • Diamonds kimberlites lamproites and related rocks in

    Diamond Kimberlite Lamproite and Related Rock Localites 6 South Carolina 16 Great Lakes Region 21 2 other sections not shown Common terms and phrases Arkansas Unnamed Blank breccia Brookins California Cannon and Mudrey carat diamond carats

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  • Catalogue of world wide diamond and kimberlite

    TY - JOUR T1 - Catalogue of world wide diamond and kimberlite occurrences T2 - a selective and annotative approach AU - Janse A J A (Bram) AU - Sheahan Patricia A PY - 1995 Y1 - 1995 N2 - Kimberlites occur on every continent and the total number of

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  • Prospector's Guide to Diamonds

    When diamond exploration programs are initiated priority is given to areas of favorability for finding ?traditional? diamondiferous host rocks For example the traditional lodes are associated with kimberlite and lamproite These are restricted to cratonic regions that

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