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Tequisquiapan
Basic information Name: Tequisquiapan
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2012
Country: Mexico
Mass:help 2.32 kg
Classification
  history:
Meteoritical Bulletin:  MB 103  (2014)  Iron, IAB complex
Recommended:  Iron, IAB complex    [explanation]

This is 1 of 68 approved meteorites (plus 1 unapproved name) classified as Iron, IAB complex.   [show all]
Search for other: IAB complex irons, Iron meteorites, and Metal-rich meteorites
Comments: Approved 25 Feb 2014
Writeuphelp
Writeup from MB 103:

Tequisquiapan        20°30’N, 99°58’W

Queretaro de Arteaga, Mexico

Found: 2012

Classification: IAB complex

History: In spring 2012, Roberto Gonzalez tripped over a small dense rock. He collected the sample and gave the material to a geography teacher, Elvia Muñiz. In February 2013, she donated the meteorite to CU.

Physical characteristics: This meteorite is a single mass of 2311.9 g, with a prismatic shape (9.3 × 7.4 × 7.85 cm). The surface of the meteorite shows minor oxidation, and poorly developed regmaglypts.

Petrography: (K. Cervantes and E. Gomez, CU) This meteorite is a medium octahedrite; kamacite has an average bandwidth of 0.77±0.15 mm. Plessite fields and taenite occupy 33% of the area of the section, while phosphides occupy less than 0.5%. The most common accessory mineral is schreibersite, with habits ranging from rhabdites to irregular shapes. Carbides present; weak Neumann bands.

Geochemistry: (E. Hernández-Álvarez and O. Morton-Bermea, Instituto de Geofísica-CU) ICP-MS. Composition of 0.4 g of shavings and small fragments: Ni 64619; Ge 105.7; Ga 44.42; Ir 1.43; Mo 121.37; Rh 0.68; Pd 3.69; Sn 11.55; Co 3897; Cr 138.8; Pt 1.2; In 0.099; Re 0.088 (all ppm).

Classification: Iron, medium octahedrite. Based on Ge/Ga=2.6, the meteorite is IAB complex; see Wasson and Kallemeyn (2002). Low weathering.

Specimens: Main mass of 2311.9 g including a polished section (3.8 g) are held by CU.

Bibliography:
  • Wasson J.T. and Kallemeyn, G.W. (2002) The IAB iron-meteorite complex: A group, five subgroups, numerous grouplets, closely related, mainly formed by crystal segregation in rapidly cooling melts. Geochim. Cosmochim. Acta 66 2445-2473 (link)
Data from:
  MB103
  Table 0
  Line 0:
State/Prov/County:Queretaro de Arteaga
Origin or pseudonym:Found near the mine at this locality.
Date:2012
Latitude:20°30'N
Longitude:99°58'W
Mass (g):2316.1
Pieces:1
Class:Iron, IAB complex
Shock stage:low
Weathering grade:low
Classifier:K. Cervantes, CU; G. Cordero-Tercero, Instituto de Geofísica-CU; E. Gómez CU; A. Segura, Instituto de Ciencias Nucleares-CU
Type spec mass (g):2311.9
Type spec location:CU
Main mass:CU
Finder:Roberto González Martínez y Elvia Muñiz Cortés
Comments:The meteorite contains schreibersite and carbides.; submitted by Karina Cervantes, CU
Institutions
   and collections
CU: Instituto de Geología (UNAM), Ciudad Universitaria, Apartado Postal 70-296, 04510 México, D.F., Mexico (institutional address; updated 28 Oct 2011)
Catalogs:
References: Published in Meteoritical Bulletin, no. 103, MAPS 52, 1014, May 2017, http://onlinelibrary.wiley.com/doi/10.1111/maps.12888/full
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Geography:

Mexico
Coordinates:
     Recommended::   (20° 30'N, 99° 58'W)

Statistics:
     This is the only approved meteorite from Queretaro de Arteaga, Mexico
     This is 1 of 111 approved meteorites from Mexico (plus 4 unapproved names) (plus 1 impact crater)
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