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Journal Article
Published: 01 May 2020
American Mineralogist (2020) 105 (5): 627–651.
... of America 2020 Mineralogical Society of America Classification mineral evolution mineral ecology natural kinds vapor deposition condensation astromineralogy stardust diamond graphite corundum moissanite hibonite amorphous phases “ The science of Mineralogy has made rapid progress...
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Journal Article
Journal: Elements
Published: 01 April 2020
Elements (2020) 16 (2): 105–110.
... under UHP conditions, as confirmed by RS of coesite and diamond, suggests that partial subduction of the leading edge of the continental crust is common in the early stages of orogenesis ( Parkinson et al. 2002 ). Based on peak UHP conditions and uplift paths (e.g., F ig . 1A ), again in part derived...
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Journal Article
Published: 01 April 2020
American Mineralogist (2020) 105 (4): 498–509.
...Erik M. Galimov; Felix V. Kaminsky; Svetlana N. Shilobreeva; Vyacheslav S. Sevastyanov; Sergei A. Voropaev; Galina K. Khachatryan; Richard Wirth; Anja Schreiber; Vladimir V. Saraykin; Gennady A. Karpov; Leonid P. Anikin Abstract Approximately 700 diamond crystals were identified in volcanic (mainly...
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Journal Article
Published: 01 January 2020
American Mineralogist (2020) 105 (1): 22–27.
... diamond carbonate carbon-rich fluids and melts oxygen fugacity metal-silicate partitioning redox freezing and melting Earth in Five Reactions: A Deep Carbon Perspective Although most people know there is carbon in the atmosphere, mainly due to the rising threat of climate change, not all...
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Journal Article
Published: 01 January 2020
American Mineralogist (2020) 105 (1): 141–143.
...Konstantin D. Litasov; Tatyana B. Bekker; Hiroyuki Kagi Recently we have found very strong evidence for the artificial origin of type Ib diamonds crystals (up to 0.7 mm in size) found in the volcanic rocks of Tolbachik volcano and peridotites and chromitites worldwide ( Litasov et al. 2019b...
Journal Article
Published: 01 January 2020
American Mineralogist (2020) 105 (1): 144–145.
.... (2020) disagree with the interpretation we made of polycrystalline diamond aggregates, which were repeatedly found and studied by us in a variety of deposits from Kamchatka, Russia, which include those within lavas of the Avacha volcano ( Kaminsky et al. 2016 ) and from the placer deposits of Koryakia...
Journal Article
Journal: Elements
Published: 01 December 2019
Elements (2019) 15 (6): 375.
... ultimately owe their existence to volatile elements once located at Earth’s surface and subsequently transported to depth. The diamonds that kimberlites sample from beneath the lithosphere provide a wealth of evidence for recycling of oceanic crustal materials and a key role for both carbonated and hydrated...
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Journal Article
Journal: Elements
Published: 01 December 2019
Elements (2019) 15 (6): 381–386.
... with rare diamonds, set in a matrix of essentially magmatic origin. Unambiguous identification of kimberlites requires careful petrographic examination combined with mineral compositional analyses. Melt inclusion studies have shown that kimberlite melts contain higher alkali concentrations than previously...
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Journal Article
Journal: Elements
Published: 01 December 2019
Elements (2019) 15 (6): 377–380.
... in ancient and thick continental lithosphere, forming intrusive sheets and composite pipes, commonly in clusters. Despite their rarity, kimberlites have attracted considerable attention because they entrain not only abundant mantle fragments but also diamonds, which can provide a uniquely rich picture...
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Journal Article
Published: 01 December 2019
American Mineralogist (2019) 104 (12): 1857–1865.
... and diamond. Diamond containing 2100–2600 ppm N and 130–150 ppm B crystallizes in equilibrium with BN within the diamond stability field at 7.8 GPa and 1600 to 1800 °C, while graphite forms at other conditions. The solubility of carbon in the C-saturated metal melt free from nitrogen and sulfur is 6.2 wt% C...
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Journal Article
Journal: Elements
Published: 01 December 2019
Elements (2019) 15 (6): 367.
... that are variously beautiful (think diamond), essential (think living cells), and toxic (think greenhouse gas). Nowhere is this split personality more evident than in the enigmatic igneous clan of kimberlites, the topic for this issue of Elements . No one who has set eyes on a cut diamond, especially the delicate...
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Journal Article
Published: 01 September 2019
European Journal of Mineralogy (2019) 31 (5-6): 857–873.
... to minerals. Corresponding author, e-mail: giancarlo.capitani@unimib.it Carborundum (SiC), alumina and diamond are widely used in mineralogy and petrography for the mechanical thinning of rock samples. Silicon carbide is also a very rare natural phase in ultra-high pressure rocks ( Di Pierro et al...
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Journal Article
Published: 01 September 2019
American Mineralogist (2019) 104 (9): 1356–1359.
.... However, the stabilities of these high-pressure iron oxides remain mostly uninvestigated. In this study, we performed in situ X-ray diffraction (XRD) measurements in a laser-heated diamond-anvil cell (DAC) to determine the phase relations in both Fe 5 O 6 and Fe 4 O 5 bulk compositions to 61 GPa...
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Journal Article
Published: 01 September 2019
American Mineralogist (2019) 104 (9): 1345–1350.
... μm was found as an inclusion in a diamond from the Koffiefontein pipe in South Africa. In addition to the dark green and opaque goldschmidtite, the diamond contained a Cr-rich augite (websteritic paragenesis) and an intergrowth of chromite, Mg-silicate, and unidentified K-Sr-REE-Nb-oxide...
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Journal Article
Published: 01 August 2019
Mineralogical Magazine (2019) 83 (4): 515–522.
...Evgeny Vasilev; Vitaly Petrovsky; Alexander Kozlov; Anton Antonov; Andrey Kudryavtsev; Ksenia Orekhova Abstract We have investigated a diamond crystal that consists of several misorientated subgrains. The main feature of the crystal is the dark areas in the cathodoluminescent core that has ‘estuary...
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Journal Article
Journal: Geology
Published: 01 August 2019
Geology (2019) 47 (8): e476.
Journal Article
Journal: Geology
Published: 01 August 2019
Geology (2019) 47 (8): e475.
Journal Article
Journal: Geology
Published: 01 August 2019
Geology (2019) 47 (8): e477–e478.
Journal Article
Journal: Geology
Published: 22 May 2019
Geology (2019) 47 (8): 715–718.
...Jan Schönig; Hilmar von Eynatten; Guido Meinhold; N. Keno Lünsdorf Abstract Local occurrences of coesite- and diamond-bearing rocks in the central Erzgebirge (northwestern Bohemian Massif, Germany) reveal ultrahigh-pressure (UHP) metamorphic conditions during the Variscan orogeny. Although UHP...
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Journal Article
Published: 07 May 2019
Geological Magazine (2019) 156 (11): 1949–1964.
..., in spite of much progress regarding the meaning and significance of this find, the history of rock that the diamonds were found in is complex and still largely ambiguous. To investigate this, we report U–Pb zircon ages obtained from the exact crushed sample material in which metamorphic diamond was first...
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