Lewis Cliff 86018 meteorite, Lewis Cliff, Buckley Island quadrangle, Transantarctic Mountains, Eastern Antarctica, Antarcticai
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Latitude & Longitude (WGS84):
84° 16' 36'' South , 161° 38' 57'' East
Latitude & Longitude (decimal):
Locality type:
Meteorite Class:
Meteoritical Society Class:
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Other/historical names associated with this locality:
LEW 86018
Ordinary Chondrite, unequilibrated (L3.1; S2; W4)
Find,1986; 502 g
A weathered meteoritic stone (10 x 6 x 6 cm) which still retained ~60% of its fusion crust readily revealed its clastic chondritic texture in spite of a rather weathered interior. Numerous inclusions (one 5 mm in length) are also present. In thin sections distinct chondrules (diameters up to 3 mm), chondrule fragments and irregular aggregates are set in a dark fine-grained matrix. Granular and porphyritic chondrules (PO,POP) are prominent. Average composition of olivine (Fa15) is indicative of the L chondrite group. Distinct chondrules and marked variability of olivine (Fa0.7-32) and pyroxene (Fs2-9) reflect the primitive L3.1 petrologic type designation. Small amounts of troilite and Fe-Ni metal surround some chondrules. Undulose extinction in olivine indicative of moderate shock (level S2). Weathering (grade W4) is seen in iron oxide veinlets and in the rust-colored matrix. Evaporite deposits are found just under the fusion crust.
While the overall LEW 86018 meteorite is roughly characterized in the above paragraph, much of the interest in this very primitive meteorite is in diverse and sometimes tiny inclusions with minerals and isotopic signatures which appear to predate most of the other components. We mention here only a few which have been reported — (1) the diversity of pyroxenes (enstatite [sensu strictu], pigeonite, Ca-poor clinopyroxene), (2) the presence of both Forsterite-rich and Fayalitic olivines, (3) and several Na-rich phases. More diversity is presumably waiting to be discovered or, perhaps, is simply not reported here.
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsMineral List
10 valid minerals.
Meteorite/Rock Types Recorded
Note: data is currently VERY limited. Please bear with us while we work towards adding this information!
Select Rock List Type
Alphabetical List Tree DiagramDetailed Mineral List:
| ⓘ Albite Formula: Na(AlSi3O8) Reference: Mishra, R.K. al. (2015) Na, K-Rich Rim Around a Chondrule in Unequilibrated Ordinary Chondrite LEW 86018 (L3.1): Lunar and Planetary Science Conference XLVI: 2994.pdf. (March 2015). |
| ⓘ Enstatite Formula: Mg2Si2O6 Habit: Enstatite, sensu strictu, (Wo~1En91-98) in very small amounts in clast LEW-1. Reference: Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999). |
| ⓘ Fayalite Formula: Fe2+2SiO4 Reference: Hartmetz, C.P., Dehart, J.M. & Hasan, F.A. (1990) LEW86018: A Rare L3.1 Unequilibrated Ordinary Chondrite (Abstract). Lunar and Planetary Science Conference XXI: 461-462. (March 1990). |
| ⓘ 'Fayalite-Forsterite Series' Reference: Meteorite Working Group (1987) Antarctic Meteorite Newsletter 10(2): Johnson Space Center, Houston. (Aug 1987).; Hartmetz, C.P., Dehart, J.M. & Hasan, F.A. (1990) LEW86018: A Rare L3.1 Unequilibrated Ordinary Chondrite (Abstract). Lunar and Planetary Science Conference XXI: 461-462. (March 1990).; Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999).; Nettles, J.W., Lofgren, G.E. & McSween Jr, H.Y. (2002) Recycled "Chondroids'' in LEW86018: A Petrographic Study of Chondrule Precursors. Lunar and Planetary Science Conference XXX: 1751-1752 (abs. no. 1752). (March 2002).; Menzies, O.N., Bland, P. A., Berry, F.J. & Cressey, G. (2005) Mössbauer spectroscopy and X-ray diffraction study of ordinary chondrites: Quantification of modal mineralogy and implications for redox conditions during metamorphism. Meteoritics & Planetary Science 40 (7): 1023-1042. (July 2005).; Mishra, R.K. al. (2015) Na, K-Rich Rim Around a Chondrule in Unequilibrated Ordinary Chondrite LEW 86018 (L3.1): Lunar and Planetary Science Conference XLVI: 2994.pdf. (March 2015).; Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages. |
| ⓘ Forsterite Formula: Mg2SiO4 Description: Forsterite, sensu strictu, with Fe contents as low as Fa 0.88. Reference: Meteorite Working Group (1987) Antarctic Meteorite Newsletter 10(2): Johnson Space Center, Houston. (Aug 1987).; Hartmetz, C.P., Dehart, J.M. & Hasan, F.A. (1990) LEW86018: A Rare L3.1 Unequilibrated Ordinary Chondrite (Abstract). Lunar and Planetary Science Conference XXI: 461-462. (March 1990).; Nettles, J.W., Lofgren, G.E. & McSween Jr, H.Y. (2002) Recycled "Chondroids'' in LEW86018: A Petrographic Study of Chondrule Precursors. Lunar and Planetary Science Conference XXX: 1751-1752 (abs. no. 1752). (March 2002). |
| ⓘ 'Glass' Reference: Mishra, R.K. al. (2015) Na, K-Rich Rim Around a Chondrule in Unequilibrated Ordinary Chondrite LEW 86018 (L3.1): Lunar and Planetary Science Conference XLVI: 2994.pdf. (March 2015). |
| ⓘ Ilmenite Formula: Fe2+TiO3 Reference: Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999). |
| ⓘ 'Limonite' Reference: Meteorite Working Group (1987) Antarctic Meteorite Newsletter 10(2): Johnson Space Center, Houston. (Aug 1987).; Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages. |
| ⓘ 'Meteoritic Iron' Reference: Menzies, O.N., Bland, P. A., Berry, F.J. & Cressey, G. (2005) Mössbauer spectroscopy and X-ray diffraction study of ordinary chondrites: Quantification of modal mineralogy and implications for redox conditions during metamorphism. Meteoritics & Planetary Science 40 (7): 1023-1042. (July 2005).; Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages. |
| ⓘ Nepheline Formula: Na3K(Al4Si4O16) Reference: Mishra, R.K. al. (2015) Na, K-Rich Rim Around a Chondrule in Unequilibrated Ordinary Chondrite LEW 86018 (L3.1): Lunar and Planetary Science Conference XLVI: 2994.pdf. (March 2015). |
| ⓘ 'Orthopyroxene Subgroup' Reference: Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999). |
| ⓘ Pigeonite Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6 Reference: Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999). |
| ⓘ 'Plagioclase' Formula: (Na,Ca)[(Si,Al)AlSi2]O8 Description: Plagioclase (An16) in lithic clast LEW-1. Reference: Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999). |
| ⓘ 'Pyroxene Group' Formula: ADSi2O6 Reference: Meteorite Working Group (1987) Antarctic Meteorite Newsletter 10(2): Johnson Space Center, Houston. (Aug 1987).; Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages. |
| ⓘ Sodalite Formula: Na4(Si3Al3)O12Cl Reference: Mishra, R.K. al. (2015) Na, K-Rich Rim Around a Chondrule in Unequilibrated Ordinary Chondrite LEW 86018 (L3.1): Lunar and Planetary Science Conference XLVI: 2994.pdf. (March 2015). |
| ⓘ Tridymite Formula: SiO2 Description: Tridymite in lithic clast Bo-1. Reference: Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999). |
| ⓘ Troilite Formula: FeS Description: Troilite 16 vol% in Menzies et al., 2005. Reference: Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999).; Menzies, O.N., Bland, P. A., Berry, F.J. & Cressey, G. (2005) Mössbauer spectroscopy and X-ray diffraction study of ordinary chondrites: Quantification of modal mineralogy and implications for redox conditions during metamorphism. Meteoritics & Planetary Science 40 (7): 1023-1042. (July 2005).; Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages. |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Troilite | 2.CC.10 | FeS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Ilmenite | 4.CB.05 | Fe2+TiO3 |
| ⓘ | Tridymite | 4.DA.10 | SiO2 |
| Group 9 - Silicates | |||
| ⓘ | Albite | 9.FA.35 | Na(AlSi3O8) |
| ⓘ | Enstatite | 9.DA.05 | Mg2Si2O6 |
| ⓘ | Fayalite | 9.AC.05 | Fe2+2SiO4 |
| ⓘ | Forsterite | 9.AC.05 | Mg2SiO4 |
| ⓘ | Nepheline | 9.FA.05 | Na3K(Al4Si4O16) |
| ⓘ | Pigeonite | 9.DA.10 | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| ⓘ | Sodalite | 9.FB.10 | Na4(Si3Al3)O12Cl |
| Unclassified Minerals, Rocks, etc. | |||
| ⓘ | 'Fayalite-Forsterite Series' | - | |
| ⓘ | 'Glass' | - | |
| ⓘ | 'Limonite' | - | |
| ⓘ | 'Meteoritic Iron' | - | |
| ⓘ | 'Orthopyroxene Subgroup' | - | |
| ⓘ | 'Plagioclase' | - | (Na,Ca)[(Si,Al)AlSi2]O8 |
| ⓘ | 'Pyroxene Group' | - | ADSi2O6 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Forsterite | Mg2SiO4 |
| O | ⓘ Pyroxene Group | ADSi2O6 |
| O | ⓘ Fayalite | Fe22+SiO4 |
| O | ⓘ Enstatite | Mg2Si2O6 |
| O | ⓘ Ilmenite | Fe2+TiO3 |
| O | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| O | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| O | ⓘ Tridymite | SiO2 |
| O | ⓘ Albite | Na(AlSi3O8) |
| O | ⓘ Nepheline | Na3K(Al4Si4O16) |
| O | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| Na | Sodium | |
| Na | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Na | ⓘ Albite | Na(AlSi3O8) |
| Na | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Na | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| Mg | Magnesium | |
| Mg | ⓘ Forsterite | Mg2SiO4 |
| Mg | ⓘ Enstatite | Mg2Si2O6 |
| Mg | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Al | Aluminium | |
| Al | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Al | ⓘ Albite | Na(AlSi3O8) |
| Al | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Al | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| Si | Silicon | |
| Si | ⓘ Forsterite | Mg2SiO4 |
| Si | ⓘ Pyroxene Group | ADSi2O6 |
| Si | ⓘ Fayalite | Fe22+SiO4 |
| Si | ⓘ Enstatite | Mg2Si2O6 |
| Si | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Si | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Si | ⓘ Tridymite | SiO2 |
| Si | ⓘ Albite | Na(AlSi3O8) |
| Si | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Si | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| S | Sulfur | |
| S | ⓘ Troilite | FeS |
| Cl | Chlorine | |
| Cl | ⓘ Sodalite | Na4(Si3Al3)O12Cl |
| K | Potassium | |
| K | ⓘ Nepheline | Na3K(Al4Si4O16) |
| Ca | Calcium | |
| Ca | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Ca | ⓘ Plagioclase | (Na,Ca)[(Si,Al)AlSi2]O8 |
| Ti | Titanium | |
| Ti | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | Iron | |
| Fe | ⓘ Fayalite | Fe22+SiO4 |
| Fe | ⓘ Ilmenite | Fe2+TiO3 |
| Fe | ⓘ Pigeonite | (CaxMgyFez)(Mgy1Fez1)Si2O6 |
| Fe | ⓘ Troilite | FeS |
References
Sort by
Year (asc) Year (desc) Author (A-Z) Author (Z-A)Meteorite Working Group (1987) Antarctic Meteorite Newsletter 10(2): Johnson Space Center, Houston. (Aug 1987).
Hartmetz, C.P., Dehart, J.M. & Hasan, F.A. (1990) LEW86018: A Rare L3.1 Unequilibrated Ordinary Chondrite (Abstract). Lunar and Planetary Science Conference XXI: 461-462. (March 1990).
Kiyota, K., Sugiura, N. & Hashizume, K. (1993) Isotopically Anomalous Nitrogen in Unequilibrated Ordinary Chondrites: Meteoritics 28 (3): page 381. (July 1993).
Grossman, J.N. (1994). The Meteoritical Bulletin, No. 76: Meteoritics 29(1): 100-143. (Jan 1994).
Ruzicka, A., Jerde, E.A., Snyder, G.A. & Taylor, L.A. (1999) A Large, Igneous-textured Inclusion Containing Co-Existing Enstatite and Ferroan Olivine in the LEW 86018 (L3.1) Chondrite (abstract): Lunar and Planetary Science Conference XXX: 1501-1502. (March 1999).
Nettles, J.W., Lofgren, G.E. & McSween Jr, H.Y. (2002) Recycled "Chondroids'' in LEW86018: A Petrographic Study of Chondrule Precursors. Lunar and Planetary Science Conference XXX: 1751-1752 (abs. no. 1752). (March 2002).
Menzies, O.N., Bland, P. A., Berry, F.J. & Cressey, G. (2005) Mössbauer spectroscopy and X-ray diffraction study of ordinary chondrites: Quantification of modal mineralogy and implications for redox conditions during metamorphism. Meteoritics & Planetary Science 40 (7): 1023-1042. (July 2005).
Mishra, R.K. et. al. (2015) Na, K-Rich Rim Around a Chondrule in Unequilibrated Ordinary Chondrite LEW 86018 (L3.1): Lunar and Planetary Science Conference XLVI: 2994.pdf. (March 2015).
Grady, M. M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.
External Links
http://www.lpi.usra.edu/meteor/metbull.php - MeteoriticalBulletinDatabase
http://www.lpi.usra.edu/meteor/metbull.php?code=12958 -LEW 86018@MetBullDatabase
http://www.lpi.usra.edu/meetings/LPSC99/pdf/1502.pdf -LEW 86018 Clast LEW-1
http://www.hou.usra.edu/meetings/lpsc2015/pdf/2994.pdf -Na-rich Chondrule rim@LEW 86018
http://www.lpi.usra.edu/meteor/metbull.php?code=12958 -LEW 86018@MetBullDatabase
http://www.lpi.usra.edu/meetings/LPSC99/pdf/1502.pdf -LEW 86018 Clast LEW-1
http://www.hou.usra.edu/meetings/lpsc2015/pdf/2994.pdf -Na-rich Chondrule rim@LEW 86018
Other Regions, Features and Areas containing this locality
Antarctic MeteoritesGroup of Meteorite Fall Locations
Antarctic PlateTectonic Plate
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