Re: Диагноз - воинственное невежество. Курс лечения - чтение спецлитературы.


Автор сообщения: Егермейстер
Дата и время сообщения: 23 July 2006 at 07:52:27:

В ответ на сообщение: Диагноз - воинственное невежество. Курс лечения - чтение спецлитературы.

Например,
http://www.scielo.br/scielo.php?pid=S0001-37652002000200008&script=sci_arttext
The USGS P-207 muscovite was used extensively as a standard in K-Ar geochronology (Dalrymple and Lanphere 1969, p. 114-115) but has not been used in 40Ar/39Ar geochronology. The incremental heating analysis of five grains of P-207 yield slightly disturbed spectra, none of which produces a well-defined plateau ages (Fig. 25a-f). Since instrumentation noise was no longer a factor during these analyses, the disturbed spectra may suggest that the grains may have undergone partial argon losses after precipitation or have domains susceptible to recoil losses (Fig. 25c), indicating that P-207 may not be a suitable standard for 40Ar/39Ar geochronology.


2378. И снова Помпеи, и снова Ar/Ar - Alexei 13:52 21.07.06 (387)
К списку тем на странице