ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01266.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01267.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01268.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01269.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

Size distribution in the Barwell, Bruderheim, Gibeon, Johnstown, Sikhote‐Alin and Tenham showers is studied. On the assumption that the distribution follows the Gates‐Gaudin‐Schumann law, which describes artificially crushed material, it is estimated that 80% of the fine material of the Gibeon shower was not collected; for the other showers the figure varies between 52 and 61%.The spacial distribution pattern of the Barwell, Johnstown, Krymka, Kunashak, Leedey, Plainview (1917), and Sikhote‐Alin meteoritic showers is studied. It is established that the patterns show considerable regularity and that the distribution pattern of fragments of any one size is a function of the sorting factor, which is the distance in kilometers between groups of fragments whose mass differs by an order of ma

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01270.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

The Needles fine octahedrite, which weighs 45.3 kg, was found in 1962 in the Turtle Mountains, about 50 km SSW of Needles, California. It contains 10.3% Ni, 77 ppm Ga, 93 ppm Ge and 4.8 ppm Ir, and is a member of chemical group II D. It is rather similar to the Wallapai, Arizona, meteorite, and may possibly be a transported mass from this multiple fall. The compositional evidence slightly favors the interpretation that Needles is a distinct fall.

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01271.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

The Ladder Creek, Horace No. 1, Horace No. 2, and Tribune meteorites were found within a comparatively small area of Greeley County, Kansas, between 1937 and 1958. Microscopic examination and analyses of the principal minerals show that Ladder Creek, Horace No. 2, and Tribune are essentially identical in composition and structure; it seems reasonable to conclude they are fragments of a single meteorite, a hypersthene chondrite. Horace No. 1 is essentially different, being a bronzite chondrite, and is evidently a distinct fall. The name Ladder Creek should be used for specimens previously called Horace No. 2 and Tribune, and the name Horace should be used for specimens previously called Horace No. 1.

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01272.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

In December, 1966, Brookins and Twiss reported the finding of two specimens of an olivine‐bronzite chondrite near Faucett, Missouri. Since that date, six additional specimens have been found. Another probable specimen was found but later lost. This paper describes the circumstances of all nine finds and presents a map of the discovery site

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01273.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01274.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY

摘要:

The curator of any collection of meteorites has an unenviable task in deciding whether, and on what terms, he should supply material for destructive study. Some relevant considerations and the policy adopted by the British Museum are outlined.

ISSN:0026-1114    

DOI:10.1111/j.1945-5100.1969.tb01275.x

出版商:Blackwell Publishing Ltd    

年代:1969

数据来源: WILEY