{sup 40}Ar/{sup 39}Ar laser fusion and K-Ar ages from Lathrop Wells, Nevada, and Cima, California: The age of the latest volcanic activity in the Yucca Mountain area

Conference · Wed May 01 04:00:00 EDT 1991

OSTI ID:138103

Turrin, B D ^[1]; Champion, D E ^[1]

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1. Geological Survey, Menlo Park, CA (USA)

K-Ar and {sup 40}Ar/{sup 39}Ar ages from the Lathrop Wells volcanic center, Nevada, and from the Cima volcanic field, California, indicate that the recently reported 20-ka age estimate for the Lathrop Wells volcanic center is incorrect. Instead, an age of 119 {plus_minus} 11 to 141 {plus_minus} 10 ka is indicated for the Lathrop Wells volcanic center. This age corrected is concordant with the ages determined by two independent isotopic geochronometric techniques and with the stratigraphy of surficial deposits in the Yucca Mountain region. In addition, paleomagnetic data and radiometric age data indicate only two volcanic events at the Lathrop Wells volcanic center that are probably closely linked in time, not as many as five as recently reported. 32 refs., 2 figs., 2 tabs.

• Research Organization: Geological Survey, Menlo Park, CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (USA)
• DOE Contract Number: AI08-78ET44802
• OSTI ID: 138103
• Report Number(s): CONF-910435--73; ON: DE91011940
• Country of Publication: United States
• Language: English

Related Subjects

05 NUCLEAR FUELS
40 CHEMISTRY
58 GEOSCIENCES
AGE ESTIMATION
ARGON 39
ARGON 40
HIGH-LEVEL RADIOACTIVE WASTES
PALEOMAGNETISM
RADIOECOLOGICAL CONCENTRATION
SITE CHARACTERIZATION
UNDERGROUND DISPOSAL
VOLCANIC REGIONS
VOLCANISM
YUCCA MOUNTAIN
Yucca Mountain Project