Usgs groundwater age dating
After oxidation to HTO, it takes part in the natural water cycle.Before the full potential of natural tritium as a tracer for water movement in natural systems could be explored its distribution was masked by addition of large amounts of so-called ‘bomb tritium’ produced during the surface tests of nuclear weapons.These problems can be overcome by using tritium in combination with its decay product He age formally calculated from equation (1) is an apparent age.Wyoming-Montana Water Science Center3162 Bozeman Ave Helena, MT 59601(406) 457-5900OR521 Progress Circle Cheyenne, WY 82007(307) 778-2931¬e=Generated by gsanswers feedback form." title="Contact the Wyoming-Montana Water Science Center." target="_blank" accesskey="c" The Wyoming-Montana Water Science Center (WSC) is one of over 40 Water Science Centers in the U. The Water Science Center main offices are located in Helena and Cheyenne.These tests which were mainly performed in the early 1960s, led to an increase of tritium in precipitation over the continents of the northern hemisphere from roughly 5 TU to levels of the order of 1000 TU.One TU (Tritium Unit) means a tritium to hydrogen ratio of 10.
During precipitation events this tritiated water enters groundwater and can be used as a dating tool for recharge.
For more information, see the USGS Technical Announcement.
Tritium is produced naturally in the upper atmosphere by interaction of nitrogen, and, to a lesser extent, oxygen with cosmic rays.
Information concerning USGS products and services can be obtained from: The Oklahoma WSC home page provides direct access to current and historical USGS streamflow data, a bibliography of Oklahoma Water Science Center reports, and much more about USGS operations in the state of Oklahoma.
Basic hydrologic data collection, processing, analysis, dissemination, and archiving are major parts of the Oklahoma Water Science Center program.