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microdiamond

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Journal Article
Published: 25 November 2020
Mineralogical Magazine (2020) 84 (6): 949–958.
... and Zheng, 2004 ); such zoning patterns have also been observed in this study ( Fig. 3e ). In contrast, some zircon cores from the diamondiferous Kokchetav rocks described by Katayama et al. ( 2001 ) and Shimizu and Ogasawara ( 2014 ) contain microdiamonds, indicating formation of these cores under UHP...
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Journal Article
Published: 01 April 2020
American Mineralogist (2020) 105 (4): 498–509.
...–0.7 mm in size (i.e., they may be called microdiamonds) and are colorless to yellow-green in color ( Fig. 4 ). They are accompanied, in samples, with single grains of moissanite, milky-white corundum, various spinellides, sulfides, Cu-Sn alloys, and native iron, aluminum, and copper...
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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
Published: 07 May 2019
Geological Magazine (2019) 156 (11): 1949–1964.
...Katarzyna Walczak; Simon Cuthbert; Ellen Kooijman; Jarosław Majka; Matthijs A. Smit Abstract The first find of microdiamond in the Nordøyane ultra-high-pressure (UHP) domain of the Western Gneiss Region (WGR) of the Scandinavian Caledonides reshaped tectonic models for the region. Nevertheless...
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Journal Article
Published: 01 May 2019
Russ. Geol. Geophys. (2019) 60 (5): 463–472.
..., Gibson Lake Area, Northwest Territories . Int. Geol. Rev. 37 , 212 – 229 . Moe , K. , Yang , J. , Johnson , P. , Xu , X. , Wang , W. , 2017 . Spectroscopic analysis of microdiamonds in ophiolitic chromitite and peridotite . Lithosphere 10 ( 1 ), 133 – 141...
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Journal Article
Published: 01 June 2018
American Mineralogist (2018) 103 (6): 1002–1005.
... and microdiamond have been found. In ZSZ serpentinites, the new UHP assemblage predates the previously recognized HP-UHP paragenesis, which was recently dated at 65 Ma. This finding opens up a new interpretation for the petrologically and structurally well-constrained HP/UHP records, especially because all other...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 27 July 2017
Lithosphere (2018) 10 (1): 156–169.
...Xiangzhen Xu; Pierre Cartigny; Jingsui Yang; Yildirim Dilek; Fahui Xiong; Guolin Guo Abstract We report new δ 13 C data and N content and aggregation state values for microdiamonds recovered from peridotites and chromitites of the Luobusa ophiolite (Tibet) and chromitites of the Ray-Iz ophiolite...
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Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 20 March 2017
Lithosphere (2018) 10 (1): 133–141.
...Kyaw Soe Moe; Jing-Sui Yang; Paul Johnson; Xiangzhen Xu; Wuyi Wang Abstract Microdiamonds ∼200 µm in size, occurring in ophiolitic chromitites and peridotites, have been reported in recent years. Owing to their unusual geological formation, there are several debates about their origin. We studied...
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Journal Article
Published: 01 July 2016
American Mineralogist (2016) 101 (7): 1696–1699.
... 300 nA beam current and 200 ms dwell times. To avoid confusion, the abbreviation “P” is used only for phosphorous; pressure is written out in full except for the abbreviations “HP” and “UHP”. One example is from UHP microdiamond-bearing quartzofeldspathic lenses of “saidenbachite” in the gneiss...
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Journal Article
Published: 01 February 2016
American Mineralogist (2016) 101 (2): 355–361.
... in ultrahigh-pressure quartzofeldspathic gneisses of the Kumdy-Kol area of the Kokchetav Massif, northern Kazakhstan. Maruyamaite contains inclusions of microdiamonds, and probably crystallized near the peak pressure conditions of UHP metamorphism in the stability field of diamond. Crystals occur as anhedral...
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Journal Article
Journal: Geology
Published: 01 December 2014
Geology (2014) 42 (12): 1107–1110.
... are known from several occurrences worldwide. We report on the discovery of microdiamond in kyanite-garnet gneiss from allochthonous metasediments of the Seve Nappe Complex in the Scandinavian Caledonides. Our discovery calls for general reconsideration of existing exhumation models of deeply subducted...
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Journal Article
Published: 01 August 2014
American Mineralogist (2014) 99 (8-9): 1798–1801.
... that kumdykolite contains 2 wt% CaO, probably indicating significant miscibility with the Ca-end-member svyatoslavite. Similar to the case of microdiamond inclusions, the kumdykolite-bearing multiphase inclusion is located in the Ca- and Mg-rich central part of the garnet and thus must have been trapped at P >...
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Journal Article
Journal: Geology
Published: 01 July 2014
Geology (2014) 42 (7): e340.
Journal Article
Published: 01 December 2013
European Journal of Mineralogy (2013) 25 (6): 919–933.
...Maria Dolores Ruiz Cruz; Carlos Sanz De Galdeano Abstract Microdiamond inclusions in garnet have been identified in pre-Triassic schists of unknown age from the Torrox unit in the Alpujárride complex, Internal Zone of the Betic Cordillera, Spain. Prior to this, ultrahigh-pressure (UH P ) phases...
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Journal Article
Journal: Elements
Published: 01 August 2013
Elements (2013) 9 (4): 261–266.
... microdiamond majorite exsolution microstructures polymorphism The spectacular discoveries of coesite and diamond in rocks of the continental crust ( Chopin 1984 ; Smith 1984 ; Sobolev and Shatsky 1990 ) firmly established the concept that these rocks had been subducted to mantle depths, thus...
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Journal Article
Journal: Elements
Published: 01 August 2013
Elements (2013) 9 (4): 248–250.
Journal Article
Journal: Lithosphere
Publisher: GSW
Published: 01 August 2012
Lithosphere (2012) 4 (4): 269–285.
... micas, an SiO 2 phase, and microdiamond (e.g., Stöckhert et al., 2001 ). These polyphase inclusions were interpreted as former melt or C-H–bearing fluid trapped at UHP ( Hwang et al., 2001 ; Stöckhert et al., 2001 , 2009 ; Massonne, 2003 ; Hwang et al., 2006 ). Further hints at a magmatic origin...
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Journal Article
Published: 01 June 2011
The Canadian Mineralogist (2011) 49 (3): 673–690.
... of the Kokchetav diamond crystals. Within the entire volume of the Kumdy-Kol and the Barchi-Kol rocks, diamond grains are less than 1 mm in size, and most of them are less than 0.5 mm in size (microdiamond). In contrast, diamond formation within the stability fields that comply with the crustal– mantle hypothesis...
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