In-situ analysis of diamonds and their inclusions from the Diavik Mine, Northwest Territories, Canada: Mapping diamond growth

Rythoven, Adrian D. Van; Schulze, Daniel J.

doi:10.1016/j.lithos.2009.04.025

Cited by 16 publications

(3 citation statements)

References 30 publications

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“…The geothermal gradient is only slightly cooler than that determined by chromian diopside geothermobarometry of diamond inclusions from the Diavik mine, Slave craton (42 mW/m 2 ; Donnelly et al 2007, Van Rythoven & Schulze 2009). Cooler geotherms were determined, however, for other occurrences of diamond on the Slave craton.…”

Section: Comparison Of Lynx Diamond Inclusions With Other Superior Anmentioning

confidence: 80%

“…The diopside found in Lynx24 is higher in chromium and lower in aluminum than that from Wawa (Stachel et al 2006), but is within the ranges of inclusions in diamond reported from the Siberian and southern African cratons (Sobolev 1977, Tsai et al 1979, 1985, Wilding et al 1991, Viljoen et al 1999). The diopside inclusions in the Lynx suite are richer in chromium (~2.3 wt.% Cr 2 O 3 ) relative to most Slave craton inclusions (0.89-2.3 wt.% Cr 2 O 3 ; Promprated et al 2004, Tappert et al 2005, Donnelly et al 2007, Van Rythoven & Schulze 2009). …”

Section: Comparison Of Lynx Diamond Inclusions With Other Superior Anmentioning

confidence: 98%

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Diamond Crystals and Their Mineral Inclusions From the Lynx Kimberlite Dyke Complex, Central Quebec

Rythoven¹,

McCandless²,

Schulze³

et al. 2011

The Canadian Mineralogist

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Lynx is a 522 Ma kimberlite dyke complex located in the Otish Mountains of central Quebec, Canada. Test sampling of the Lynx kimberlite yielded 6598 macrodiamond samples from 528 t of kimberlite. Single crystals strongly dominate the population, with only 14% of the macrodiamond portion consisting of macles and aggregates. Within the single crystals, 41% are dominated by octahedral surface features, and the remaining ones are partially resorbed tetrahexahedroida. Brown is the most common color among the tetrahexahedroida, with only 22% gray to colorless stones comprising the remainder. In contrast, the octahedra are roughly equal in numbers of brown, gray and colorless stones. A subset of twenty stones was selected in the -11 to +3 DTC (0.256 c to 0.67 c) range of circular sieve sizes on the basis of visible inclusions. These have octahedral primary growth-forms and include three macles and three aggregates of octahedra. Most of the samples are significantly resorbed; they range from octahedra with rounded corners and edges to tetrahexahedroida. Shield laminae, serrate laminae, and hillocks are the most common resorption-related surface features. The stones were cut and polished along single planes to expose mineral inclusions for analysis and to allow imaging of internal structure of the diamond relative to the inclusions. Cathodoluminescence imaging revealed deformation lamellae in most of the polished crystals. Some exhibit deformation lamellae truncated by growth or resorption zones or intersections of different crystallographic planes. Oscillatory patterns of planar growth with complex cores are most common. Inclusions, particularly of olivine, typically occur in core and early growth regions of the diamond crystals. Primary inclusions exposed by polishing are magnesian olivine, chromian diopside, chromian pyropic garnet, magnesian orthopyroxene, omphacite, and sulfide. The chromian diopside inclusions yield equilibration conditions in the range of 58-60 kbar and 1250-1280°C that correspond to conditions slightly below a 42 mW/m 2 surface heat-flow geothermal gradient. The most iron-rich olivine inclusion (mg# = 0.916) occurs with the diopside inclusions, suggesting a relatively fertile lherzolitic component of mantle at 180-190 km depth. The garnet data indicate that within the peridotite parentage, both harzburgitic (three G10, 12.4-13.7 wt.% Cr 2 O 3 , 3.7-4.4 wt.% CaO) and lherzolitic (one G9, 8.9 wt.% Cr 2 O 3 , 5.8 wt.% CaO) parageneses are present.

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Section: Comparison Of Lynx Diamond Inclusions With Other Superior Anmentioning

confidence: 80%

Section: Comparison Of Lynx Diamond Inclusions With Other Superior Anmentioning

confidence: 98%

Diamond Crystals and Their Mineral Inclusions From the Lynx Kimberlite Dyke Complex, Central Quebec

Rythoven¹,

McCandless²,

Schulze³

et al. 2011

The Canadian Mineralogist

View full text Add to dashboard Cite

show abstract

“…), Hervig et al (1986), Hutchison (1997), Jaques et al (1989Jaques et al ( , 1990, Kopylova et al (1997), Korolev et al (2018), Logvinova et al (2015), McDade and Harris (1999), Moore and Gurney (1989), Nimis et al (2020), Otter and Gurney (1989), Phillips et al (2004), Pokhilenko et al (1977Pokhilenko et al ( , 2004, Ponomarenko et al (1980), Rickard et al (1989), Shee et al (1982), Sobolev (1977), Sobolev et al (1976Sobolev et al ( , 1997aSobolev et al ( ,b, 1999Sobolev et al ( , 2009, Stachel and Harris (1997a,b), Stachel et al (1998Stachel et al ( , 2003Stachel et al ( , 2004Stachel et al ( , 2018, Tappert et al (2005Tappert et al ( , 2006, Tsai et al (1979), University of Cape Town (unpubl. reports), Van Rythoven and Schulze (2009), Van Rythoven et al (2011), Viljoen et al (1992), Wang et al (2000), Wilding et al (1994).…”

Section: Touching Vs Non-touchingmentioning

confidence: 98%