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Jepara
Basic information Name: Jepara
     This is an OFFICIAL meteorite name.
Abbreviation: There is no official abbreviation for this meteorite.
Observed fall: No
Year found: 2008
Country: Indonesia
Mass:help 499.5 kg
Classification
  history:
Meteoritical Bulletin:  MB 100  (2012)  Pallasite, PMG 
Recommended:  Pallasite, PMG    [explanation]

This is 1 of 43 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 19 Jul 2011
Writeuphelp
Writeup from MB 100:

Jepara        6°36’S, 110°44’E

Java, Indonesia

Found: May 2008

Classification: Pallasite (Main group)

History: Anonymous finders recovered the meteorite specimen in 2008 during excavation activities in muddy ground.

Physical characteristics: The original mass of the meteorite boulder was 499.5 kg. It is spherically shaped with the shortest and longest diameter of 70 cm and 85 cm, respectively. The crust is weathered and rusty.

Petrography: The interior shows a homogeneous distribution of coarse-grained rounded olivine grains (6 to 12 mm). The groundmass is composed of secondary magnetite, nickel sulfide and sulfate (nickel hexahydrite), and primary schreibersite. Modal abundances are olivine (64 vol%), magnetite (23 vol%), nickel sulfide and sulfate (8 vol%), and schreibersite (5 vol%).

Geochemistry: Olivines are homogeneous in composition (Fa12-13). Sulfide is composed of NiS and may represent a replacement product of troilite, while magnetite (Fe3O4) is a weathering product of primary FeNi phases. Schreibersite has the composition (Fe1.85Ni1.15)P. Replicate analyses of oxygen isotopes were made on acid-washed samples by laser fluorination at UGött (A. Pack): δ17O (SMOW) 1.862, 1.367, 1.380; δ18O (SMOW) 3.820, 3.011, 3.160; and Δ17O -0.130 -0.200, -0.280 (all per mil).

Classification: Main group pallasite, extensively weathered, fresh olivine

Specimens: Type specimens of 230 g and 20 g with surface areas of 190 cm2 and 20 cm2, respectively, and one thin section are on deposit at UJena. An anonymous owner holds the main mass.

Data from:
  MB100
  Table 1
  Line 514:
State/Prov/County:Java
Date:May 2008
Latitude:6°36'S
Longitude:110°44'E
Mass (g):499500
Pieces:1
Class:Pallasite, PMG
Weathering grade:W4
Fayalite (mol%):12-13
Classifier:Falko Langenhorst, UBayr
Type spec mass (g):250
Type spec location:UJena
Main mass:anonymous
Finder:anon
Comments:Submitted by Falko Langenhorst
Plots: O isotopes:  
Institutions
   and collections
UJena: Friedrich Schiller University of Jena, Institute of Geosciences, Burgweg 11, 07749 Jena, Germany (institutional address; updated 19 Jul 2011)
UBayr: Bayerisches Geoinstitut, University of Bayreuth, D-95440 Bayreuth, Germany (institutional address; updated 11 Oct 2019)
Catalogs:
References: Published in Meteoritical Bulletin, no. 100, MAPS 49, E1-E101 (2014)
Find references in NASA ADS:
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Photos:
CreditPhotos
Photos uploaded by members of the Encyclopedia of Meteorites.
    (Caution, these are of unknown reliability)
abibou   
Alan Mazur   
Chris Spratt   
Christophe PICQ   
David L. Ribeca   
Franco Vignato   
Gerald Armstrong   
Jean-Michel Masson   
John Tanner   
Jörg-Florian Jensch   
KD Meteorites   
Krzysztof Nowak   
Liam02   
METEORITICON      
Michael S. Scherman      
Mirko Graul         
Piotr gural100   
Rene Schmit         
Robert Zdancewicz   
Woreczko Jan & Wadi   
Zsolt Kereszty      
Geography:

Indonesia
Coordinates:
     Recommended::   (6° 36'S, 110° 44'E)

Statistics:
     This is 1 of 4 approved meteorites from Jawa Tengah, Indonesia (plus 1 unapproved name)
     This is 1 of 19 approved meteorites from Indonesia (plus 1 unapproved name)
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