摘要:

AbstractAn interesting fragment of the Toluca, Mexico, sideritic shower (ECN = +997,194) is described. It is interesting from the viewpoint of the concentration of minor meteoritic constituents in abundance and from the viewpoint of structure. The principal constituent is kamacite, but the fragment contains macroscopically visible schreibersite, graphite, troilite, daubréelite, and lawrencite. One (1) figure and 4 tables are given

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00157.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

摘要:

AbstractA Perseid spectrum, obtained in 1949, is compared with 5 other Perseid spectra. Density measures for this spectrum indicate a marked increase in strength, during bursts, of the H and K lines of CaII relative to the strong neutral Fe and Mg line at 3830 A. The available data indicate tentatively that: (1) Perseid spectra resemble one another more than do type‐Yspectra as a whole; (2) the meteorites producing Perseid meteors are less diverse in composition than are aerolites in genera

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00158.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00159.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00160.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

摘要:

AbstractIn this paper are given details concerning a chondritic meteorite found in 1933 near the La Lande post office in De Baca County, New Mexico. Macroscopic and microscopic mineralogical examinations and chemical analyses are given. The meteorite is composed chiefly of olivine and enstatite (variety, hypersthene), lesser amounts of a dispersed metallic phase, and small percentages of enstatite‐clinoenstatite intergrowths and secondary hematite. On the basis of this investigation, the La Lande meteorite is classified as a hypersthene‐olivine chondrite (Chy). Evidence is presented to indicate that the La Lande aerolite may not be a distinct fall, but may be simply a member of the widely scattered Melrose, Curry County, New Mexico, shower. Three (3) figures and 2 tables are gi

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00161.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

摘要:

AbstractSix (6) dual observations of meteors, made with the naked eye and with a telescope or binoculars, are discussed. It is found that one (1) was a “point” meteor. Two (2) were “line” meteors seen with the telescope or binoculars before being noticed with the naked eye and at below‐the‐naked‐eye magnitude. Three (3) were “line” meteors, for which the binocular and the naked‐eye observers recorded essentially the s

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00162.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

摘要:

AbstractA method for permanently marking the exact location of each meteorite discovered, and a plan for the construction and erection of a convenient type of permanent marker, similar to those in use by the United States Coast and Geodetic Survey, are described.

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00163.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00164.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

摘要:

AbstractThis paper presents certain historical facts relating to the discovery of meteorites in the neighborhood of the Odessa, Texas, Meteorite Crater; a discussion of the distribution and other characteristics of the meteoritic materials so far recovered by surface and subsurface search at that crater; a detailed mineralogical and metallographic study of the metallic phase of the meteorite; and chemical and radiochemical analyses of the sideritic material. The results of the investigation, insofar as they relate to the unaltered nickel‐iron, are consonant with the classification of Odessa as a coarse octahedrite (Og). Two (2) figures and 2 tables are give

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00165.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY

摘要:

AbstractThe history of the recovery of the masses that comprize the Glorieta Mountain, New Mexico, siderite is reviewed. The present paper is based on a detailed mineralogical, metallographical, and chemical investigation of the remarkable cane‐shaped specimen from the Department of Geology of the University of New Mexico. The meteoritic constituents present are kamacite, taenite, plessite, schreibersite, and lawrencite. The meteorite is classified as a medium octahedrite (Om

ISSN:0096-2805    

DOI:10.1111/j.1945-5100.1951.tb00166.x

出版商:Blackwell Publishing Ltd    

年代:1951

数据来源: WILEY