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Northwest Africa 8614 meteorite (NWA 8614), Northwest Africa Meteoritesi
Regional Level Types
Northwest Africa 8614 meteorite (NWA 8614)Meteorite Fall Location
Northwest Africa MeteoritesMeteorite Fall Location

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Meteorite Class:
Meteoritical Society Class:


Northwest Africa 8614 is classified as a winonaite on the basis of oxygen isotope ratios, mineralogy, and highly reduced chemistry. Unlike other winonaites, it contains numerous and readily apparent chondrules, with over a dozen chondrules apparent in two small thin sections. The large number of chondrules sets apart this meteorite from other winonaites.

Owing to the abundance of chondrules, NWA 8614 may be one of the least heated winonaites and therefore may provide clues to the chondritic protolith of the winonaite parent body. Overall textures are similar to those found in type 6 chondrites that escaped significant melting.

Despite similar geothermometer temperatures for various mineral pairs, NWA 8614 apparently did not attain Fe-Mg equilibrium between olivine and pyroxene. Like other winonaites, NWA 8614 has olivine compositions that are too magnesian for equilibrium relative to low-Ca pyroxene. Among winonaites as a whole, there is no evidence for a curved trend between Fa and Fs compositions as would be expected for FeO-reduction during metamorphism [Benedix, et al 1998], nor for mineral compositions that correlate with geothermometry temperatures. This argues against a single metamorphic FeO reduction trend from a common chondritic precursor. Instead, protoliths for different winonaites may have varied slightly in composition.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


7 valid minerals.

Meteorite/Rock Types Recorded

Note: this is a very new system on mindat.org and data is currently VERY limited. Please bear with us while we work towards adding this information!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

'Albite-Anorthite Series'
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
Chromite
Formula: Fe2+Cr3+2O4
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
Daubréelite
Formula: Fe2+Cr3+2S4
Reference: Farley, K.R., Ruzicka, A.M., and Armstrong, K. (2015) NWA 8614: The least heated Winonaite? 46th Lunar and Planetary Science Conference, PDF 1821.
Diopside
Formula: CaMgSi2O6
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
'Fayalite-Forsterite Series'
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
Iron
Formula: Fe
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
'Orthopyroxene Subgroup'
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
Schreibersite
Formula: (Fe,Ni)3P
Reference: Farley, K.R., Ruzicka, A.M., and Armstrong, K. (2015) NWA 8614: The least heated Winonaite? 46th Lunar and Planetary Science Conference, PDF 1821.
Taenite
Formula: (Fe,Ni)
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory
Troilite
Formula: FeS
Reference: https://doczz.net/doc/6809765/april-2015---cascadia-meteorite-laboratory

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Iron1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Schreibersite1.BD.05(Fe,Ni)3P
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
Daubréelite2.DA.05Fe2+Cr3+2S4
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Group 9 - Silicates
Diopside9.DA.15CaMgSi2O6
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
'Orthopyroxene Subgroup'-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Schreibersite1.1.21.2(Fe,Ni)3P
Taenite1.1.11.2(Fe,Ni)
Group 2 - SULFIDES
AmXp, with m:p = 1:1
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 3:4
Daubréelite2.10.1.11Fe2+Cr3+2S4
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Unclassified Minerals, Mixtures, etc.
'Albite-Anorthite Series'-
'Fayalite-Forsterite Series'-
Iron-Fe
'Orthopyroxene Subgroup'-

List of minerals for each chemical element

OOxygen
O DiopsideCaMgSi2O6
O ChromiteFe2+Cr23+O4
MgMagnesium
Mg DiopsideCaMgSi2O6
SiSilicon
Si DiopsideCaMgSi2O6
PPhosphorus
P Schreibersite(Fe,Ni)3P
SSulfur
S TroiliteFeS
S DaubréeliteFe2+Cr23+S4
CaCalcium
Ca DiopsideCaMgSi2O6
CrChromium
Cr ChromiteFe2+Cr23+O4
Cr DaubréeliteFe2+Cr23+S4
FeIron
Fe Taenite(Fe,Ni)
Fe Iron (var: Kamacite)(Fe,Ni)
Fe TroiliteFeS
Fe ChromiteFe2+Cr23+O4
Fe IronFe
Fe DaubréeliteFe2+Cr23+S4
Fe Schreibersite(Fe,Ni)3P
NiNickel
Ni Taenite(Fe,Ni)
Ni Iron (var: Kamacite)(Fe,Ni)
Ni Schreibersite(Fe,Ni)3P

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Farley, K.R., Ruzicka, A.M., and Armstrong, K. (2015) NWA 8614: The least heated Winonaite? 46th Lunar and Planetary Science Conference, PDF 1821.

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