* Astronomy

Members Login
Post Info TOPIC: Mayo Belwa meteorite


L

Posts: 131433
Date:
RE: Mayo Belwa meteorite
Permalink  
 


A fireball was seen by herdsmen and sounds were heard over an area extending to 25 km from the impact site. The stone was sent to the Geological Survey of Nigeria and smelt strongly of sulphur when first received.
Read more



__________________


L

Posts: 131433
Date:
Permalink  
 

Title: METAL AND SCHREIBERSITE IN MAYO BELWA, AN ENSTATITE ACHONDRITE
Authors: A.L. Graham

The Mayo Belwa meteorite (an aubrite) contains discrete metal grains ranging in size from less than 1 m to 300 m across, and schreibersites up to 25 m across. Intergrowths of metal and schreibersite also occur. These phases are distributed heterogeneously throughout the meteorite and are present both in the fine-grained matrix and within silicate crystals. The concentrations of the elements Ni, Fe, Si, Co, P, were determined in grains larger than 4 m across. Most metal grains have 1-8% Ni, the total range being 0.8-23.5% Ni. The 1-8% Ni metal may be sub-divided into two compositional groups, one relatively compact, having 1-3.8% Ni, 0.1-0.3% Si; the second having a much greater range in both Ni and Si (~4-12%, 0.1-1.2% respectively).

Read more



__________________


L

Posts: 131433
Date:
Permalink  
 

The Mayo Belwa (Aubrite) meteorite fell in Adamawa, Nigeria, on the 3rd August, 1974.
A total mass of 4.85 kg was recovered.

8 58'N, 12 5'E



__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard