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Hambleton
Basic information Name: Hambleton
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2005
Country: United Kingdom
Mass:help 17.6 kg
Classification
  history:
Meteoritical Bulletin:  MB 91  (2007)  Pallasite-Main gr
Recommended:  Pallasite, PMG    [explanation]

This is 1 of 42 approved meteorites (plus 1 unapproved name) classified as Pallasite, PMG.   [show all]
Search for other: Main group pallasites, Metal-rich meteorites, and Pallasites
Comments: Approved 25 Sep 2006
Revised 26 May 2009: Revised pallasite classifications
Writeuphelp
Writeup from MB 91:

Hambleton                                           54°1425′′N, 1°1156′′W

Hambleton, North Yorkshire, England, United Kingdom

Find: August 2005

Pallasite (main group)

History: A mass was found beside a forest track by R. and I. Elliott while they were hunting for meteorites, ~2 km south of Hambleton, North Yorkshire, England.

Physical characteristics: One 17.6 kg piece was found. It has a highly weathered exterior with centimeter-size patches of blue weathering products. No fusion crust is present.

Petrography and mineral compositions: (D. Johnson and M. M. Grady, OU; R. Hutchison and C. Kirk, NHM) The meteorite is brittle and easily fragments. It contains ~60 vol% olivine (Fo88.3), ~25 vol% metal, and ~15 vol% sulfide (all irregularly distributed). Olivine ranges in size from ~10 mm in fractured, rounded grains that form mosaics in olivine-rich regions, to angular fragments <0.1 mm set in metal or sulfide where these opaques are dominant. The olivine mosaics have metal and/or sulfide veins along grain boundaries or filling fractures. Metal is largely kamacite, commonly as plessitic intergrowths with taenite, which also forms thin rims with Ni <60 wt%. Sulfides are abnormally abundant for a pallasite and some regions (<5 cm across) are composed almost exclusively of troilite, enclosing minor fragmented olivines. Within olivine and metal, sulfides occur as veins, commonly with Ni-poor centers and Ni-rich rims. Chromite and schreibersite are accessory phases. The outer 1 cm of the mass is terrestrially weathered, with veins of Fe-oxides and patches of a blue phosphate mineral.

Geochemistry: Oxygen isotopic: (I. A. Franchi, PSSRI, OU) δ17O = +1.383, δ18O = +3.029, Δ17O = −0.187 (all ‰).

Classification: Pallasite (main group).

Type specimen: A 1 kg type specimen, 3 slices, and 1 thin section are on deposit at OU. R. Elliott of Fernlea holds the main mass.

Plots: O isotopes:  
Institutions
   and collections
NHM: Department of Mineralogy, The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom; Website (institutional address; updated 9 Dec 2011)
OU: Planetary and Space Sciences Department of Physical Sciences The Open University Walton Hall Milton Keynes MK7 6AA United Kingdom, United Kingdom (institutional address; updated 8 Dec 2011)
Fernlea: Rob Elliott, Fernlea Meteorites, Milton of Balgonie, Fife. KY7 6PY, Scotland, United Kingdom; Website (private address)
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
References: Published in Meteoritical Bulletin, no. 91, MAPS 42, 413-466 (2007)
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Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Don Edwards   
Fernlea Meteorites         
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
Alan Mazur   
David Hardy   
Kieron Heard   
Zsolt Kereszty   
Geography:

United Kingdom
Coordinates:
     Recommended::   (54° 14' 25"N, 1° 11' 56"W)

Statistics:
     This is 1 of 14 approved meteorites from England, United Kingdom (plus 13 unapproved names)
     This is 1 of 22 approved meteorites from United Kingdom (plus 23 unapproved names)
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