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Kamargaon | |||||||||||||||||||||||||||||||||||||||
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Basic information | Name: Kamargaon This is an OFFICIAL meteorite name. Abbreviation: There is no official abbreviation for this meteorite. Observed fall: Yes, confirmed fall Year fell: 2015 Country: India Mass: ![]() | ||||||||||||||||||||||||||||||||||||||
Classification history: |
This is 1 of 12401 approved meteorites (plus 8 unapproved names) classified as L6. [show all] Search for other: L chondrites, L chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7) | ||||||||||||||||||||||||||||||||||||||
Comments: |
Approved 31 Mar 2016 Revised 8 Nov 2016: Correct name from Komar Gaon to Kamargaon | ||||||||||||||||||||||||||||||||||||||
Writeup![]() |
Writeup from MB 105:
Kamargaon 26°37’56.9884"N, 93°46’11.5115"E Assam, India Confirmed fall: 13 Nov 2015 Classification: Ordinary chondrite (L6) History: On November 13, 2015, at 12:00 pm local time, a meteorite fell near the town of Kamargaon in the Golaghat district of Assam, India. The villagers saw the meteorite falling from the clear sky on a bright sunny day followed by 30 to 40 s of sonic booms. A 12.095 kg mass impacted in a freshly plowed field forming a 45 cm diameter by 90 cm deep hole. The superintendent of police for the Golaghat district subsequently procured the meteorite. The fall was reported in the November 14 issue of the local newspaper, Dainik Janambhumi. Details of the fall are described by Goswami et al. (2016). The meteorite was broken into four pieces and three pieces distributed as follows: 2.668 kg to the Department of Applied Geology, DibrU, ~ 2kg to the Department of Physics, Assam University, and 2.15 kg to the Jorhat Science Center and Planetarium. Goswami, T.K., Ray, D., Sarmah, R.K., Goswami, U., Bhattacharyya, P., Majumdar, D., Bezbaruah, D. and Borgohain, P. (2016) Komargaon, Assam (India) witnessed a new meteorite fall. Planex, 6 (1), 10-11. Physical characteristics: (T.K. Goswami, DibrU) Single fusion-crusted blocky stone showing a few broad regmaglypts. Sawn surface is light greyish white with even distribution of small metal and sulfide grains and a few recognizable chondrules, one to 8 mm. Stone crisscrossed by a few shock veins. The hammered stone broke along one of the shock veins, which shows a well-developed slickenside surface. Fusion crust to 1 mm thick. Petrography: (L. Garvie, ASU) A polished microprobe section shows dominantly coarse-grained recrystallized minerals, with few recognizable chondrules. Plagioclase, anhedral, abundant to 250 μm. Sparse chromite grains to 350 μm are anhedral with rounded outlines and heavily fractured. Troilite grains to 400 μm, single crystal and lacking shock lamellae. Metal grains to 0.5 mm, range from polycrystalline kamacite, to composite grains composed of polycrystalline kamacite, dark etched plessite and high Ni-metal. Kamacite lacks Neumann bands. Fine-grained melt pockets are present but rare. Scattered Ca-Cl and Ca-Mg-Na phosphates to 0.5 mm found. Geochemistry: (L. Garvie, ASU) Olivine Fa25.1±0.4, Fe/Mn=48.4±3.2 wt%, n=16. Low Ca pyroxene Fs21.2±0.2Wo1.4±0.2, Fe/Mn=30.0±1.8 wt%, n=8. High Ca pyroxene Fs8.4±0.3Wo44.5±0.4, n=3. Feldspar An9.4±0.4Or6.7±0.2, n=8. Classification: Ordinary chondrite, L6, S3, W0 Specimens: 23.4 g and one polished mount at ASU. | ||||||||||||||||||||||||||||||||||||||
Data from: MB105 Table 0 Line 0: |
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Institutions and collections |
ASU: Center for Meteorite Studies, Arizona State University, Tempe, Arizona 85287-1404, United States; Website (institutional address; updated 14 Jan 2012) DibrU: Dibrugarh University Dibrugarh-786004 Assam, India (institutional address; updated 31 Mar 2016) |
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Catalogs: |
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References: | Published in Meteoritical Bulletin, no. 105, MAPS 52, 2411, September 2017. http://onlinelibrary.wiley.com/doi/10.1111/maps.12944/full
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Geography:![]() |
Statistics: This is 1 of 4 approved meteorites from Assam, India This is 1 of 144 approved meteorites from India (plus 10 unapproved names) (plus 2 impact craters) | ||||||||||||||||||||||||||||||||||||||
Proximity search: | |||||||||||||||||||||||||||||||||||||||
Synonyms![]() |
Komar Gaon (Error made in initial announcement) |