Radioactive dating cesium pb 210
The age of the sediment from a particular depth in the sediment column can then be inferred.
If modelling and interpretation are requested, the Pb-210 results will normally be modelled to obtain the best fit of the data, where possible.
The three isotopes lead-206, lead-207, and lead-208 represent the ends of three decay chains: the uranium series (or radium series), the actinium series, and the thorium series, respectively; a fourth decay chain, the neptunium series, terminates with the thallium isotope Th, respectively.
However, each of them also occurs, to some extent, as primordial isotopes that were made in supernovae, rather than radiogenically as daughter products.
In the absence of historic geochemical baseline data for the Grants uranium region, environmental changes resulting from uranium mine-mill activities can be determined only by indirect methods.
Roughly 50 years ago, a small group of scientists from Belgium and the USA, trying to better constrain ice sheet accumulation rates, attempted to apply what was then known about environmental lead as a potential geochronometer.We have been providing radioisotope dating services for over 30 years and have dated cores from around the world (See the map below).Our client base is international and includes environmental consulting companies, universities, government research institutes and communities.Because clay-rich sediments retain possible radionuclides and heavy metals derived from mineralization and mined sources, sample sites which contain fine-grained deposits that both predate and postdate mine-mill activity were located in abandoned-channel segments (oxbows) of major streams draining the eastern Grants uranium region. Aerial photographs (and derivative maps) taken between 19 provided the historical and geomorphic documentation of approximate dates of oxbow formation and ages of alluvial fills in the abandoned-channel segments.