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Pantar meteorite, Pantar, Lanao, Central Mindanao, Mindanao, Philippines

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Latitude & Longitude (WGS84): 8° 4' North , 124° 17' East
Latitude & Longitude (decimal): 8.06666666667, 124.283333333
Other regions containing this locality:Asia

Ordinary chondrite, polymict brecciated (H5, br; S4; W0)
Fell, 16 June 1938; 2.23 kg

Accompanied by a dust cloud, the Pantar bolide led to the recovery of approximately 16 stones including one which was recovered from a rice paddy at a depth of ~1 m. In addition, there were numerous reports of very small particles falling on roofs in the moments following the main events. Fe-Ni grains are quite evident in hand specimens with some dark grey regions distinctly darker and more friable than other lighter grey regions. Chondrules are quite small (usually less than 1 mm in diameter) and small veins are also present. Compositionally, bulk iron contents (26.47 wt%Fe) and olivine (Fa18) are characteristic of the H-chondrite geochemical group. Mineralogically the meteorite consists primarily of olivine and orthopyroxene with minor plagioclase, troilite, and Fe-Ni metal. Accessory chromite, and other very minor opaques, including free copper, are found.

A relatively short cosmic ray exposure age of ~3.1 Ma has been recorded. The H (relatively high in total iron) chondrites are the second largest group of ordinary chondrites and represent ~40% of classified witnessed falls. The H5 petrologic type is the largest subgroup and account for ~50 % of the total. The main Pantar mass has been kept at the Center for Meteorite Studies in Tempe, Arizona [part of the Nininger legacy].

Mineral List

8 valid minerals.

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Nininger, H. H. (1938) Contributions of the Society for Research on Meteorites: The Pantar, Lanao, Philippine Islands, meteorite: Popular Astronomy, 46: 578-580.
Fredriksson, K. & Keil, K. (1963) The light-dark structure in the Pantar and Kapoeta stone meteorites: Geochimica et Cosmochimica Acta 27(7): 717-739. (July 1963).
Snetsinger, K.G. & Keil, K. (1969) Ilmenite in ordinary chondrites. Amer. Mineral. 54 (5/6):780-786. (May-June1969).
Mason, B. (1963) Olivine in ordinary chondrites. Geochimica et Cosmochimica Acta 27(9): 1011-1023. (Sept 1963).
Ramdohr, P. (1973). The Opaque Minerals in Stony Meteorites. Elsevier Publishing Company: Amsterdam; London: New York. 245 pages.
Graf, T. & Marti, K. (1995) Collisional History of H Chondrites: Journal of Geophysical Research 100 (E10): 247-263. (Oct 1995).
Grady, M.M (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Grady, M.M., Pratesi, G. & Moggi-Cecchi, V. (2015) Atlas of Meteorites. Cambridge University Press: Cambridge, United Kingdom. 373 pages.

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