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Title: Summary of Age-Dating Analysis in the Fenner Basin, Eastern Mojave Desert, California

Abstract

Stable isotopes of oxygen (oxygen-18) and hydrogen (deuterium) in water were measured to determine recharge sources for Fenner Basin groundwater. The deuterium and oxygen-18 signatures (reported as {delta}D and {delta}{sup 18}O values) ranged from -11.9 to -9.3 per mil. The more negative values originate from high elevation recharge in the New York Mountains and were also observed in the northern and eastern parts of the groundwater basin. less negative values were observed in the Providence Mountains along the western part of the basin. Groundwater collected in the Fenner Gap (i.e. Project Area) had signatures between -10.6 and -10.9 per mil, suggesting a mixture of recharge from both northern, western, and probably local recharge areas in the basin. The annual contribution of groundwater recharge to Fenner Gap from the Clipper, Marble, and Old Woman mountains is still inconclusive due to lack of isotopic data. Isotopic signatures of mean annual precipitation collected by Friendman and others (1992) at Mitchell Caverns, as well as recently recharged groundwater in the Providence and New York mountains, are similar to the isotopic values in Fenner Gap groundwater. This indicates that this groundwater has a Holocene age (less than 10,000 years old), since groundwater recharged during themore » Pleistocene had isotopic signatures significantly more negative than today due to past global cooling.« less

Authors:
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (US)
Sponsoring Org.:
USDOE Office of Defense Programs (DP) (US)
OSTI Identifier:
793966
Report Number(s):
UCRL-ID-139564
TRN: US200302%%688
DOE Contract Number:  
W-7405-Eng-48
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: 1 Jun 2000
Country of Publication:
United States
Language:
English
Subject:
08 HYDROGEN; 54 ENVIRONMENTAL SCIENCES; CALIFORNIA; DEUTERIUM; GROUNDWATER RECHARGE; HYDROGEN; MIXTURES; MOUNTAINS; NEW YORK; OXYGEN; OXYGEN 18; PRECIPITATION; STABLE ISOTOPES; WATER

Citation Formats

Davisson, M L. Summary of Age-Dating Analysis in the Fenner Basin, Eastern Mojave Desert, California. United States: N. p., 2000. Web. doi:10.2172/793966.
Davisson, M L. Summary of Age-Dating Analysis in the Fenner Basin, Eastern Mojave Desert, California. United States. doi:10.2172/793966.
Davisson, M L. Thu . "Summary of Age-Dating Analysis in the Fenner Basin, Eastern Mojave Desert, California". United States. doi:10.2172/793966. https://www.osti.gov/servlets/purl/793966.
@article{osti_793966,
title = {Summary of Age-Dating Analysis in the Fenner Basin, Eastern Mojave Desert, California},
author = {Davisson, M L},
abstractNote = {Stable isotopes of oxygen (oxygen-18) and hydrogen (deuterium) in water were measured to determine recharge sources for Fenner Basin groundwater. The deuterium and oxygen-18 signatures (reported as {delta}D and {delta}{sup 18}O values) ranged from -11.9 to -9.3 per mil. The more negative values originate from high elevation recharge in the New York Mountains and were also observed in the northern and eastern parts of the groundwater basin. less negative values were observed in the Providence Mountains along the western part of the basin. Groundwater collected in the Fenner Gap (i.e. Project Area) had signatures between -10.6 and -10.9 per mil, suggesting a mixture of recharge from both northern, western, and probably local recharge areas in the basin. The annual contribution of groundwater recharge to Fenner Gap from the Clipper, Marble, and Old Woman mountains is still inconclusive due to lack of isotopic data. Isotopic signatures of mean annual precipitation collected by Friendman and others (1992) at Mitchell Caverns, as well as recently recharged groundwater in the Providence and New York mountains, are similar to the isotopic values in Fenner Gap groundwater. This indicates that this groundwater has a Holocene age (less than 10,000 years old), since groundwater recharged during the Pleistocene had isotopic signatures significantly more negative than today due to past global cooling.},
doi = {10.2172/793966},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {6}
}

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