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Basic information Name: Mahadeva
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: Yes, confirmed fall
Year fell: 2019
Country: India
Mass:help 15 kg
Meteoritical Bulletin:  MB 109  (2020)  H5
Recommended:  H5    [explanation]

This is 1 of 11567 approved meteorites (plus 23 unapproved names) classified as H5.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Approved 31 May 2020
Writeup from MB 109:

Mahadeva        26°28’56.28’’N, 86°35’53.17’’E

Bihar, India

Confirmed fall: 2019 Jul 22

Classification: Ordinary chondrite (H5)

History: A single stone weighing ~15 kg fell at 14:30 IST, July 22, 2019, in a water-laden paddy field near Mahadeva village, ~6 km east of the Laukahi Police station, Madhubani district, Bihar state, India. Farmers witnessed a fireball-like object and heard a loud sound, with emanations of smoke from the site after the fall. The meteorite was recovered by the farmers from a 1.5 m deep impact pit.

Physical characteristics: The fusion crust is relatively smooth, dull brown, with regmaglypts (simple to compound). Flow lines are absent. A few broken surfaces of the sample expose the interior, with abundant grains of metal/sulfide set in a grayish white silicate matrix.

Petrography: EPMA and SEM were used to examine a polished thick section. Most chondrules are in the 250-600 μm size range, and are barred, porphyritic, and cryptocrystalline varieties. Modal abundances are 40% olivine, 35% low-Ca pyroxene, 7% feldspar (makelynite/ plagioclase glass), 4% high-Ca pyroxene, 8% metal, 4% troilite, 2% accessories like chromite and merrillite. The matrix is coarsely crystalline, and chondrule-matrix integration is common. Feldspars (<70 μm) are common in matrix, some occurring as an interstitial phase within chondrules.

Geochemistry: The olivine composition of chondrule and matrix are almost indistinguishable (Fa17-21, mean Fa19.3, and Fa19-23, mean Fa20.4, respectively). The feldspar in matrix is fairly uniform in composition of Ab80.3±1.9An17.1±2.4Or2.6±0.8. Low-Ca pyroxene and high-Ca pyroxene composition ranges are Fs17.6-19.3Wo1.6-3.2 and Fs6.8Wo46.6, respectively. Bulk chemical composition SiO2 (33.9%), FeO (35.7%), Al2O3(2.35%), CaO (1.76%), MgO (22.4%), Na2O (0.97%) and K2O (0.10%).

Classification: H5

Specimens: 100 g at PRL. Main Mass at Bihar Museum, Patna.

Data from:
  Table 0
  Line 0:
Origin or pseudonym:Mahdeva
Date:2019 Jul 22
Mass (g):~15000
Shock stage:S2
Weathering grade:W0
Fayalite (mol%):19.3
Ferrosilite (mol%):17.6-19.3
Wollastonite (mol%):1.6-3.2
Classifier:D. K. Panda, A. D. Shukla
Type spec mass (g):100
Type spec location:PRL
Main mass:Bihar Science Museum, Patna
Finder:Rajkumar Prasad, Bihari Yadav and Rajkumar Khatwe, Mahadeva vilage
Comments:Submitted by A.D. Shukla
   and collections
PRL: Physical Research Laboratory, Navrangpura, Ahmedabad, 380 009, India; Website (institutional address; updated 6 Dec 2017)
References: Published in Meteoritical Bulletin, no. 109, in preparation (2020)
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     Recommended::   (26° 28' 56"N, 86° 35' 53"E)

     This is 1 of 11 approved meteorites from Bihar, India
     This is 1 of 146 approved meteorites from India (plus 10 unapproved names) (plus 2 impact craters)
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