| 2175 |
Creator |
1c5c32b11b5ad1bd9c846a77784abc38 |
| 2175 |
Creator |
ext-25a5968f67a750c4ae1a416cde09e2c9 |
| 2175 |
Creator |
ext-4f99b87b4b3716df8da33df03d151a18 |
| 2175 |
Creator |
ext-8a6629be756baacc7732e98a4ce85b5b |
| 2175 |
Creator |
ext-ef9a8962210a97c4f6b2fe5d224cdef6 |
| 2175 |
Creator |
ext-f58fef05df1b15389c4dd8fb2c08c58e |
| 2175 |
Date |
2004-09 |
| 2175 |
Is Part Of |
p00244937 |
| 2175 |
Is Part Of |
repository |
| 2175 |
abstract |
Multiple inclusions of minerals in diamonds from the Snap Lake/King Lake kimberlites
of the southeastern Slave craton in Canada have been analyzed for trace elements to
elucidate the petrogenetic history of these inclusions, and of their host diamonds.
As observed worldwide, the harzburgitic-garnet diamond inclusions (DIs) possess sinusoidal
REE patterns that indicate an early depletion event, followed by metasomatism by LREE-enriched,
HREE-depleted fluids. Furthermore, these fluids appear to
contain appreciable concentrations of LILE and HFSE, based on the increasing abundances
of these elements in the olivine inclusion that occurs at the outer portion of a diamond
compared to that near the core. The compositions of these fluids are probably a mixture
of hydrous-silicic melt, carbonatitic melt, and brine, similar to the compositions
of micro-inclusions in diamonds reported by Navon et al. (2003). Comparison between
the compositions of majoritic and normal harzburgitic garnets shows that the
former are more depleted in terms of major/minor elements (higher Cr#) but significantly
more enriched in the REE (up tof10). This characteristic may indicate the higher susceptibility
for metasomatic enrichment of previously more depleted garnets. Garnets of eclogitic
paragenesis show strong LREE-depleted patterns, whereas the coexisting omphacite inclusion
has relatively flat light and middle-REE but depleted HREE. Whole-rock reconstruction
from coexisting garnet and omphacite inclusions indicates that
the protolith of these inclusions was probably the extrusive section of an oceanic
crust, subducted beneath the Slave craton. |
| 2175 |
authorList |
authors |
| 2175 |
issue |
1-4 |
| 2175 |
status |
peerReviewed |
| 2175 |
volume |
77 |
| 2175 |
type |
AcademicArticle |
| 2175 |
type |
Article |
| 2175 |
label |
Promprated, Prinya; Taylor, Lawrence A.; Anand, Mahesh ; Floss, Christine; Sobolev,
Nikolai P. and Pokhilenko, Nikolai V. (2004). Multiple-mineral inclusions in diamonds
from the Snap Lake/King Lake kimberlite dike, Slave craton, Canada: a trace-element
perspective. Lithos, 77(1-4) pp. 69–81. |
| 2175 |
label |
Promprated, Prinya; Taylor, Lawrence A.; Anand, Mahesh ; Floss, Christine; Sobolev,
Nikolai P. and Pokhilenko, Nikolai V. (2004). Multiple-mineral inclusions in diamonds
from the Snap Lake/King Lake kimberlite dike, Slave craton, Canada: a trace-element
perspective. Lithos, 77(1-4) pp. 69–81. |
| 2175 |
Title |
Multiple-mineral inclusions in diamonds from the Snap Lake/King Lake kimberlite dike,
Slave craton, Canada: a trace-element perspective |
| 2175 |
in dataset |
oro |