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Journal Article
Journal: Geology
Published: 27 May 2022
Geology (2022) 50 (9): 1038–1042.
...L. Pasqualetto; F. Nestola; D.E. Jacob; M.G. Pamato; B. Oliveira; S. Perritt; I. Chinn; P. Nimis; S. Milani; J.W. Harris Abstract Diamonds are witnesses of processes that have operated in Earth's mantle over more than 3 b.y. Essential to our understanding of these processes is the determination...
FIGURES
Journal Article
Journal: Geology
Published: 27 May 2022
Geology (2022) 50 (9): 996–1000.
...Sofia Lorenzon; Davide Novella; Paolo Nimis; Steven D. Jacobsen; Emilie Thomassot; Martha G. Pamato; Loredana Prosperi; Alessandra Lorenzetti; Matteo Alvaro; Frank Brenker; Franco Salvadego; Fabrizio Nestola Abstract Natural diamonds and their inclusions provide unique glimpses of mantle processes...
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Journal Article
Published: 01 March 2022
American Mineralogist (2022) 107 (3): 377–384.
... for decades. For this purpose, the characterization of carbon phases can provide further information on diamond and graphite formation in ureilites, shedding light on the origin and history of this meteorite group. In this work, we present X-ray diffraction and micro-Raman spectroscopy analyses performed...
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Journal Article
Published: 01 March 2022
American Mineralogist (2022) 107 (3): 405–412.
... and is similar to that determined for natural Al-bearing jeffbenite, Mg 3 Al 2 Si 3 O 12 , reported from inclusions in superdeep diamonds. The structure is a tetragonal orthosilicate in space group I 42 d with a = 6.6449(4) Å, c = 18.4823(14) Å, and is structurally more closely related to zircon than to garnet...
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Journal Article
Published: 22 February 2022
The Canadian Mineralogist (2022) 60 (1): 67–90.
...Adrian D. van Rythoven; Daniel J. Schulze; Richard A. Stern; Mei Yan Lai ABSTRACT Forty-one samples of diamond from the Jurassic 95-2 kimberlite pipe in the Lake Timiskaming Kimberlite Cluster, Superior Craton, Canada, were imaged using cathodoluminescence and analyzed by secondary ion mass...
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Journal Article
Published: 01 December 2021
American Mineralogist (2021) 106 (12): 2028–2030.
... with diamonds, dumps, and fumaroles: crowningshieldite, goldschmidtite, breyite, cardite, grimmite, hrabákite, freitalite, dioskouriite, dobrovolskyite, ferroefremovite, and vasilseverginite. Crowningshieldite crystallizes in space group P 6 3 /mmc with a = 3.44(1) Å, c = 5.36(1) Å, and has...
Journal Article
Journal: Elements
Published: 01 October 2021
Elements (2021) 17 (5): 321–326.
...Suzette Timmerman; Anna V. Spivak; Adrian P. Jones Carbonatitic high-density fluids and carbonate mineral inclusions in lithospheric and sub-lithospheric diamonds reveal comparable compositions to crustal carbonatites and, thus, support the presence of carbon-atitic melts to depths of at least...
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Journal Article
Journal: Elements
Published: 01 August 2021
Elements (2021) 17 (4): 292–293.
... of diamonds in ureilites was revived by Miyahara et al. (2015) and Nabiei et al. (2018) , who studied diamonds in ureilitic clast MS-170 from the Almahata Sitta (AhS) polymict ureilite and claimed that the clast was a unique sample from a low-shock level in which primary features were preserved. Miyahara...
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Journal Article
Published: 01 July 2021
American Mineralogist (2021) 106 (7): 1053–1063.
... as reduced as SiC or Fe-Si alloys are unstable in an FeO-bearing, hot, convecting mantle. Based on our results, we advise against questioning existing models of ophiolite genesis because of accessory diamonds and ultra-reduced phases of doubtful origin. Starting materials for the redox experiments were 65...
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Journal Article
Published: 01 May 2021
American Mineralogist (2021) 106 (5): 669–671.
...Fabrizio Nestola Figure 1. An example of a host-inclusion system. In this specific case, the transparent host is a natural diamond from Udachnaya (Siberia, Russia), whereas the black inclusion is a magnesiochromite spinel [~(Mg,Fe)(Cr,Al) 2 O 4 ]. Magnesiochromite, in turn, has in contact...
FIGURES
Journal Article
Published: 01 May 2021
Russ. Geol. Geophys. (2021) 62 (5): 547–556.
... from different localities in the Kokchetav subduction–collision zone and from the diamondiferous and diamond-free metasedimentary rocks and granite gneisses of the Kumdy-Kol metamorphic diamond deposit ( Shatsky et al., 1999 ). These data indicated that 147 Sm/ 144 Nd variations in the diamond-free...
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Journal Article
Published: 01 May 2021
Russ. Geol. Geophys. (2021) 62 (5): 525–546.
.... On this basis, the CBB can be interpreted as a fragment of a late Mesoarchean ophiolite, the beginning of subduction of which gave rise to growth of the continental crust of the BP ( Slabunov et al., 2019 ). eclogite Archean Paleoproterozoic subduction collision tectonic collage orogeny diamond...
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Journal Article
Published: 01 February 2021
American Mineralogist (2021) 106 (2): 165–173.
...Anton Shatskiy; Anton V. Arefiev; Ivan V. Podborodnikov; Konstantin D. Litasov Abstract To clarify the effect of water on carbonate-silicate liquid immiscibility in the diamond stability field, we performed experiments in the system KAlSi 3 O 8 -CaMgSi 2 O 6 -NaAlSi 2 O 6 -CaMg(CO 3 ) 2 under...
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Journal Article
Published: 01 February 2021
American Mineralogist (2021) 106 (2): 301–308.
... ( I ) ( hkl )]: 1.992 (100) (102), 1.718 (55) (110), 2.978 (53) (100), 2.608 (35) (101), and 1.304 (17) (202). Crowningshieldite was found as part of a multiphase inclusion in a gem-quality, colorless, type IIa (containing less than ~5 ppm N) diamond from the Letseng mine, Lesotho. The inclusion...
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