Bencubbin-like Carbonaceous Chondrite [CBa; S2; W0]
Disaggregated stones with conspicuous metal and silicate nodules

In the early evening of April 3, 1984 the meteorite fell in a corn field near the village of Bogga Dingare after a bright fireball was seen with an explosion. Local people hammered the meteorite into many pieces, and most of the material was dispersed. The original mass may have been ~100 kg, but only 12 kg is accounted for. Various pieces have passed thru many hands with inconsistent amounts of weathering. Gujba is the only known CBa fall, but its nature was not known until the CB group had been formally defined using Bencubbin as a prototype. Members of the CBa subgroup are distinguished by their chondrule-like silicates, abundant metal, and virtual lack of refractory inclusions.

The CB group is somewhat of an outlier among Carbonaceous Chondrites, but its chemical affinities to other Carbonaceous and, most especially, its oxygen isotope peculiarities, place it clearly within the larger grouping’s defined boundaries.

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Standard Detailed Gallery Strunz Chemical Elements

Mineral List

11 valid minerals.

Meteorite/Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

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Alphabetical List Tree Diagram

ⓘ CBa chondrite meteorite

Detailed Mineral List:

ⓘ Augite

Formula: (Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆

Reference: Weisberg, M. K.; Boesenberg, J. S.; Ebel, D. S. (2002). Gujba and Origin of the Bencubbin-like (CB) Chondrites. 33rd Annual Lunar and Planetary Science Conference, March 11-15, 2002, Houston, Texas, abstract no.1551. (March 2002).

ⓘ Augite var. Fassaite

Formula: (Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]

ⓘ Coesite

Formula: SiO₂

Reference: Weisberg, M.K. & Kimura, M. (2010). Petrology and Raman spectroscopy of high pressure phases in the Gujba CB chondrite and the shock history of the CB parent body. Meteoritics & Planetary Science Volume 45, Issue 5, pages 873–884. (May 2010); Weisberg, M. K.; Kimura, M.; Suzuki, A.; Ohtani, E.; Sugiura, N. (2006). 37th Annual Lunar and Planetary Science Conference, March 13-17, 2006, League City, Texas, abstract no.1788. (March 2006).

ⓘ Diamond

Formula: C

Reference: Garvie, L. A. J.; Németh, P.; Buseck, P. R. (2011). Diamond, Bucky-Diamond, Graphite-Diamond, Al-Silicate, and Stishovite in the Gujba CB Chondrite. 74th Annual Meeting of the Meteoritical Society, held August 8-12, 2011 in London, UK. Published in Meteoritics and Planetary Science Supplement, id. #5227.

ⓘ 'Fayalite-Forsterite Series'

Reference: Grossman, J. N. & Zipfel, J. (2001). The Meteoritical Bulletin, No. 85, 2001 September. Meteoritics & Planetary Science vol.36, #9 (Supplement), pp. A293-A322. (Sept 2001).

ⓘ Graphite

Formula: C

ⓘ Iron

Formula: Fe

Reference: Rubin, A.E.; Kallemeyn, G.W.; Wasson, J.T.; Clayton, R.N.; Mayeda, T.K.; Grady, M.M. and Verchovsky, A.B. (2001). Gujba: A new Bencubbin-like meteorite fall from Nigeria. In: 32nd Lunar and Planetary Science Conference, 12-16 March 2001, Houston, Texas, USA.

ⓘ Iron var. Kamacite

Formula: (Fe,Ni)

ⓘ Majorite

Formula: Mg₃(MgSi)(SiO₄)₃

ⓘ 'Melilite Group'

Formula: Ca₂M(XSiO₇)

ⓘ 'Pyroxene Group'

Formula: ADSi₂O₆

Reference: Grossman, J. N. & Zipfel, J. (2001). The Meteoritical Bulletin, No. 85, 2001 September. Meteoritics & Planetary Science vol.36, #9 (Supplement), pp. A293-A322. (Sept 2001).

ⓘ Quartz

Formula: SiO₂

Reference: Weisberg, M. K.; Kimura, M.; Suzuki, A.; Ohtani, E.; Sugiura, N. (2006). 37th Annual Lunar and Planetary Science Conference, March 13-17, 2006, League City, Texas, abstract no.1788. (March 2006).

ⓘ Spinel

Formula: MgAl₂O₄

ⓘ Stishovite

Formula: SiO₂

ⓘ Troilite

Formula: FeS

Reference: Grossman, J. N. & Zipfel, J. (2001). The Meteoritical Bulletin, No. 85, 2001 September. Meteoritics & Planetary Science vol.36, #9 (Supplement), pp. A293-A322. (Sept 2001).

ⓘ Wadsleyite

Formula: Mg₄O(Si₂O₇)

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Diamond	1.CB.10a	C
ⓘ	Graphite	1.CB.05a	C
ⓘ	Iron	1.AE.05	Fe
ⓘ	var. Kamacite	1.AE.05	(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
ⓘ	Troilite	2.CC.10	FeS
Group 4 - Oxides and Hydroxides
ⓘ	Coesite	4.DA.35	SiO₂
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Spinel	4.BB.05	MgAl₂O₄
ⓘ	Stishovite	4.DA.40	SiO₂
Group 9 - Silicates
ⓘ	Augite	9.DA.15	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
ⓘ	var. Fassaite	9.DA.15	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
ⓘ	Majorite	9.AD.25	Mg₃(MgSi)(SiO₄)₃
ⓘ	Wadsleyite	9.BE.02	Mg₄O(Si₂O₇)
Unclassified Minerals, Rocks, etc.
ⓘ	'Fayalite-Forsterite Series'	-
ⓘ	'Melilite Group'	-	Ca₂M(XSiO₇)
ⓘ	'Pyroxene Group'	-	ADSi₂O₆

List of minerals for each chemical element

C	Carbon
C	ⓘ Diamond	C
C	ⓘ Graphite	C
O	Oxygen
O	ⓘ Pyroxene Group	ADSi₂O₆
O	ⓘ Coesite	SiO₂
O	ⓘ Majorite	Mg₃(MgSi)(SiO₄)₃
O	ⓘ Spinel	MgAl₂O₄
O	ⓘ Wadsleyite	Mg₄O(Si₂O₇)
O	ⓘ Melilite Group	Ca₂M(XSiO₇)
O	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
O	ⓘ Quartz	SiO₂
O	ⓘ Stishovite	SiO₂
O	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Na	Sodium
Na	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
Mg	Magnesium
Mg	ⓘ Majorite	Mg₃(MgSi)(SiO₄)₃
Mg	ⓘ Spinel	MgAl₂O₄
Mg	ⓘ Wadsleyite	Mg₄O(Si₂O₇)
Mg	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
Mg	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Al	Aluminium
Al	ⓘ Spinel	MgAl₂O₄
Al	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
Si	Silicon
Si	ⓘ Pyroxene Group	ADSi₂O₆
Si	ⓘ Coesite	SiO₂
Si	ⓘ Majorite	Mg₃(MgSi)(SiO₄)₃
Si	ⓘ Wadsleyite	Mg₄O(Si₂O₇)
Si	ⓘ Melilite Group	Ca₂M(XSiO₇)
Si	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
Si	ⓘ Quartz	SiO₂
Si	ⓘ Stishovite	SiO₂
Si	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
S	Sulfur
S	ⓘ Troilite	FeS
Ca	Calcium
Ca	ⓘ Melilite Group	Ca₂M(XSiO₇)
Ca	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
Ca	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ti	Titanium
Ti	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
Fe	Iron
Fe	ⓘ Troilite	FeS
Fe	ⓘ Iron var. Kamacite	(Fe,Ni)
Fe	ⓘ Augite var. Fassaite	(Ca,Na)(Mg,Fe²⁺,Al,Fe³⁺,Ti)[(Si,Al)₂O₆]
Fe	ⓘ Iron	Fe
Fe	ⓘ Augite	(Ca_xMg_yFe_z)(Mg_y1Fe_z1)Si₂O₆
Ni	Nickel
Ni	ⓘ Iron var. Kamacite	(Fe,Ni)

References

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Year (asc) Year (desc) Author (A-Z) Author (Z-A)

Grossman, J. N. & Zipfel, J. (2001). The Meteoritical Bulletin, No. 85, 2001 September. Meteoritics & Planetary Science:36(9) (supplement): A293-A322. (September, 2001).

Rubin, A.E., Kallemeyn, G.W., Wasson, J.T., Clayton, R.N., Mayeda, T.K., Grady, M.M. and Verchovsky, A.B. (2001). Gujba: A new Bencubbin-like meteorite fall from Nigeria. In: 32nd Lunar and Planetary Science Conference, 12-16 March 2001, Houston, Texas, USA.

Weisberg, M.K. & Kimura, M. (2010). Petrology and Raman spectroscopy of high pressure phases in the Gujba CB chondrite and the shock history of the CB parent body. Meteoritics & Planetary Science: 45(5): 873–884. (May 2010).

External Links

http://www.lpi.usra.edu/meteor/metbull.php (Meteoritical Society’s “Meteoritical Society Database”)

Other Regions, Features and Areas containing this locality

African PlateTectonic Plate

Benue Trough basinBasin

West AfricaUN Subregion

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Gujba meteorite, Bogga Dingare, Yobe, NigeriaiRegional Level TypesGujba meteoriteMeteorite Fall Location Bogga Dingare- not defined - YobeState NigeriaCountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

References

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External Links

Other Regions, Features and Areas containing this locality

Gujba meteorite, Bogga Dingare, Yobe, Nigeria i
Regional Level Types
Gujba meteorite Meteorite Fall Location
Bogga Dingare - not defined -
Yobe State
Nigeria Country