Cosmogenic chlorine-36 production in K-feldspar

Evans, John; Stone, John O.; Fifield, L.K.; Cresswell, Richard

doi:10.1016/s0168-583x(96)00714-8

Cited by 62 publications

(79 citation statements)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Details on sample locations and significance can be found in Table 1 of Phillips (2016). These can be supplemented by a number of cosmogenic surface-exposure dating studies (Nishiizumi et al, 1989;Phillips et al, 1990;Phillips et al, 1996;Evans et al, 1997;James et al, 2002;Phillips et al, 2009;Dühnforth et al, 2010;Rood et al, 2011). Results from some of these studies were critically examined by Phillips et al (2016b).…”

Section: Methodsmentioning

confidence: 99%

Glacial chronology of the Sierra Nevada, California, from the Last Glacial Maximum to the Holocene

Phillips

2017

CIG

View full text Add to dashboard Cite

show abstract

Section: Methodsmentioning

confidence: 99%

Glacial chronology of the Sierra Nevada, California, from the Last Glacial Maximum to the Holocene

Phillips

2017

CIG

View full text Add to dashboard Cite

show abstract

“…Boulder ages also were calculated using 36 Cl production values from Stone et al (1996) and Evans et al (1997) and from Phillips et al (1996bPhillips et al ( , 2001 and Evans et al (1998). Use of the 36 Cl production values of Phillips et al (1996b and Evans et al (1998), and the 10 Be production value obtained by averaging the values of Klein and Gosse (2002) and Kubik and Ivy-Ochs (2004) resulted in comparable 10 Be and 36 Cl ages on individual boulders (Table 2, column 4).…”

Section: Article In Pressmentioning

confidence: 99%

“…In addition, spallation production constants for 36 Cl from Ca and K (48.8 and 170 atoms/g/yr) derived by Stone et al (1996) and Evans et al (1997) were applied to calculation of the 36 Cl ages of three boulders from north-central Colorado. All ages were calculated using a bulk density of 2.7 g/cm 3 and a neutron attenuation coefficient of 170 g cm À2 .…”

Section: Article In Pressmentioning

confidence: 99%

See 1 more Smart Citation

New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado

Benson

Madole

Landis

et al. 2005

Quaternary Science Reviews

View full text Add to dashboard Cite

New cosmogenic surface-exposure ages of moraine-crest boulders from southwestern Colorado are compared with published surface-exposure ages of boulders from moraine complexes in north-central Colorado and in west-central (Fremont Lake basin) Wyoming.10 Be data sets from the three areas were scaled to a single 10 Be production rate of 5.4 at/g/yr at sea level and high latitude (SLHL), which represents the average 10 Be production rate for two high-altitude, mid-latitude sites in the western United States (US) and Austria. Multiple nuclide ages on single boulders indicate that this 10 Be production rate yields ages comparable to those calculated with a commonly used 36 Cl production scheme. The average age and age range of moraine-crest boulders on terminal moraines at the southwestern Colorado and Wyoming sites are similar, indicating a retreat from their positions $16.8 36 Cl ka (Cosmogenic ages in this paper are labeled 10 Be or 36 Cl ka or just ka when both 10 Be or 36 Cl ages are being discussed; radiocarbon ages are labeled 14 C ka, calibrated radiocarbon are labeled cal ka, and calendar ages are labeled calendar ka. Errors (71s) associated with ages are shown in tables. Radiocarbon ages were calibrated using the data of Hughen et al. (Science 303 (2004) 202). This suggests a near-synchronous retreat of Pinedale glaciers across a 470-km latitudinal range in the Middle and Southern Rocky Mountains. Hypothetical corrections for snow shielding and rock-surface erosion shifts the time of retreat to between 17.2 and 17.5 10 Be ka at Pinedale, Wyoming, and between 16.3 and 17.3 36 Cl ka at Hogback Mountain, Colorado.

show abstract

“…Muon production in CHLOE is based on the work of Evans et al (1998). In CHLOE the calculation of low-energy neutron absorption, the Phillips et al ( , 2001, Stone et al (1996) and Evans et al (1997). Erosion rates refer to those rates necessary to increase the apparent of age of sample to 140 kyr quantification of the flux distribution, and its dependence on chemical composition is based on work discussed in Phillips et al (2001).…”

Section: Samples Formentioning

confidence: 99%

The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines

Benson

Madole

Phillips

et al. 2004

Quaternary Science Reviews

View full text Add to dashboard Cite

Peter, "The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines" (2004 36 Cl ages of Pinedale boulder surfaces by an average of B12%. Most ages for pre-Pinedale (Bull Lake) boulders fall within marine-isotope stage (MIS) 5, a time when continental and Sierran ice accumulations were small or nonexistent. Under the assumption that these boulders were deposited on moraines that formed before the end of MIS 6 (B140 kyr BP), calculations indicated that rock-surface erosion rates would have had to range from 5.9 to 10.7 mm kyr À1 to produce the observed 36 Cl values. When compared to rates that have been documented for the past 20 kyr, these erosion rates are extremely high. Snow shielding accounts for 0-48% of the additional years needed to shift pre-Pinedale dates to MIS 6. This suggests that some combination of snow shielding, sediment shielding, or 36 Cl leakage has greatly decreased the apparent ages of most pre-Pinedale boulders. Inability to account for the effects of these processes seriously hinders the use of cosmogenic ages of pre-Pinedale boulders as estimators of the timing of alpine glaciation. Published by Elsevier Ltd.

show abstract

Cosmogenic chlorine-36 production in K-feldspar

Cited by 62 publications

References 13 publications

Glacial chronology of the Sierra Nevada, California, from the Last Glacial Maximum to the Holocene

Glacial chronology of the Sierra Nevada, California, from the Last Glacial Maximum to the Holocene

New data for Late Pleistocene Pinedale alpine glaciation from southwestern Colorado

The probable importance of snow and sediment shielding on cosmogenic ages of north-central Colorado Pinedale and pre-Pinedale moraines

Contact Info

Product

Resources

About