header
  MetSoc Home            Publications            Contacts  
Search the Meteoritical Bulletin Database
Last update: 14 Oct 2020
Search for: Search type: Search limits: Display: Publication:
Names
Text help
Places
Classes
Years
Contains
Starts with
Exact
Sounds like
NonAntarctic
Falls  Non-NWAs
What's new
  in the last:
Limit to approved meteorite names
Search text:  
Mount Baldr A76001
Basic information Name: Mount Baldr A76001
     This is an OFFICIAL meteorite name.
Abbreviation: MBRA76001
This meteorite may also be called Mount Baldr 76001 (MBR 76001) in publications.

Observed fall: No
Year found: 1976
Country: Antarctica [Collected jointly by ANSMET (US) and NIPR (Japan)]
Mass:help 4.71 kg
Classification
  history:
Antarctic Meteorite Newsletter:  AMN 1(3)  (1978)  H6
Meteoritical Bulletin:  MB 56  (1979)  H6
MB 76  (1994)  H6
NHM Catalogue:  5th Edition  (2000)  H6
NIPR Catalogue:  2000 Edition  (2000)  H4
MetBase:  v. 7.1  (2006)  H6
Recommended:  H6    [explanation]

This is 1 of 6121 approved meteorites (plus 5 unapproved names) classified as H6.   [show all]
Search for other: H chondrites, H chondrites (type 4-7), Ordinary chondrites, and Ordinary chondrites (type 4-7)
Comments: Revised 28 Oct 2019: Corrected mass, per JSC
Writeuphelp
Writeup from MB 56:
Warning: the following text was scanned and may contain character recognition errors. Refer to the original to be sure of accuracy.

DISCOVERY OF THE MOUNT BALDR, ANTARCTICA, STONY METEORITE

Name: MOUNT BALDR

Place of find: West of Mt. Baldr, upper Wright Valley, Victoria Land, Antarctica.

77° 35'2"S., 160° 19'35"E.

Date of find: December 15, 1976.

Class and type: Stone. Olivine-bronzite chondrite (H6).

Number of individual

specimens: 2

Total weight: 17.89 kg

Circumstances of find: Two stones were found by the U.S.-Japan Joint Expedition to Antarctica during the 1976-1977 season, on blue ice. They weighed 13.782 kg and 4.108 kg respectively and were found 700 m apart.

Source: W.A. Cassidy et al., 1977. Antarctica: a deep-freeze storehouse for meteorites. Science 198, 727-731.

Note: The smaller stone was also referred to as Mount Baldr No. 1, Mount Baldr (a), and the larger stone as Mount Baldr No. 2, Mount Baldr (b). These are synonymous, H.W. Weber and L. Schultz, 1978. Meteoritics 13, abstr.

See also: K. Yanai, 1978. First meteorites found in Victoria Land, Antarctica, December 1976 and January 1977. Mem. Nat. Inst. Polar Res., Special Issue No. 8, 51-69, and E. Olsen et al., 1978. Eleven new meteorites from Antarctica, 1976-1977. Meteoritics 13, 209-225.


[From Antarctic Meteorite Newsletter 4(1):]

Sample No.: MBRA76001

Location: Mt. Baldr

Field No.:

Weight (gms): 1096.0 -

Meteorite Type: H6 Chondrite

 

Physical Description:

The stone is covered with a reddish-brown fusion crust (<.5 mm) on two surfaces. Two surfaces are reddish-brown fracture surfaces, and two surfaces are cut. The fusion crust is pitted with numerous tiny holes. Several fractures penetrate the meteorite and iron oxide staining is present along some of these fractures. The matrix material is light gray. Approximate dimensions: 10.7 x 5.6 x 7.4 cm.

 

Petrographic Description:

This meteorite has been described in Olsen, et al., 1978, as Mt. Baldr a.

Data from:
  MB76
  Table 2
  Line 4751:
Mass (g):4108
Class:H6
Weathering grade:B
Fayalite (mol%):18
Ferrosilite (mol%):16
Catalogs:
Search for specimens in the Smithsonian Institution collection (U.S.):   
    Require SI photo
Search for this meteorite in the NIPR database (Japan):   
Search for this meteorite in the NASA/JSC database (U.S.):   
References: Published in Antarctic Meteorite Newsletter 1(3) (1978), JSC, Houston
Published in Meteoritical Bulletin, no. 56, Meteoritics 14, 161-175 (1979)
Published in Meteoritical Bulletin, no. 76, Meteoritics 29, 100-143 (1994)
Find references in NASA ADS:
Find references in Google Scholar:
Photos:
CreditPhotos
Photos from the Encyclopedia of Meteorites:
Mike Bandli   
Geography:

Antarctica
Coordinates:
     Catalogue of Meteorites:   (77° 35'S, 160° 34'E)
     Recommended::   (77° 35' 2"S, 160° 19' 35"E)
Note: the NHM and MetBase coordinates are 5.8 km apart

Statistics:
     This is 1 of 40129 approved meteorites from Antarctica (plus 4494 unapproved names)
Proximity search:
Find nearby meteorites: enter search radius (km):
Synonymshelp: Mount Baldr (From MetBase)

Direct link to this page