Problems Related to Interplanetary Matter (1961) / Chapter Skim
Currently Skimming:
DIAMONDS IN METEORITES
DIAMONDS IN METEORITES
Pages 77-81
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 77... ...
Parent objects of lunar size, however, are hard to reconcile with evidence discussed in two papers by members of our group (Goles, Fish and Anders, 1960; Fish, Goles and Anders, 1960) and with the model of meteoritic synthesis developed in the latter paper.
|
From page 78... ...
Stability fields for diamond, graphite and cohenite in the presence of excess iron. Metastable phases are indicated by brackets.
|
From page 79... ...
Microscopic examination of diamond-bearing Canyon Diablo specimens reveals that, in contrast to the diamond-free type, the kamacite (a-phase) is poly crystalline, the Neumann lines have been annealed out, and there are borders of martensite (metastable iron-carbon alloy, formed only by very rapid cooling of carbon-rich ^-phase)
|
From page 80... ...
For the ureilites, on the other hand, it may easily be established that they arrived at the Earth's surface with relatively low terminal velocities, so that this explanation would not apply. Nevertheless, at least once in their preterrestrial history the ureilites must have been involved in a violent collison (upon the occasion of the break-up of their parent body)
|
From page 81... ...
the value obtained for the crater depth could be uncertain by a factor of one hundred and therefore of little use. REFERENCES Bovenkerk, H
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.