The lithium depletion boundary (LDB) technique is a method proposed for dating
open cluster
An open cluster is a type of star cluster made of up to a few thousand stars that were formed from the same giant molecular cloud and have roughly the same age. More than 1,100 open clusters have been discovered within the Milky Way galaxy, an ...
s based on a determination of the
lithium
Lithium (from el, λίθος, lithos, lit=stone) is a chemical element with the symbol Li and atomic number 3. It is a soft, silvery-white alkali metal. Under standard conditions, it is the least dense metal and the least dense solid ...
abundances of a cluster's stars whose masses are at about the
hydrogen burning mass limit.
[Darling, David. 2004. ''The Universal Book of Astronomy''.]
References
Open clusters
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