Calibration of cosmogenic 36Cl production rates from Ca and K spallation in lava flows from Mt. Etna (38°N, Italy) and Payun Matru (36°S, Argentina)

Schimmelpfennig, Irene; Benedetti, Lucilla; Garreta, Vincent; Pik, Raphaël; Blard, Pierre‐Henri; Burnard, Pete; Bourlès, Didier; Finkel, Robert C.; Ammon, K.; Dunai, Tibor J.

doi:10.1016/j.gca.2011.02.013

Cited by 101 publications

(77 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…5). This behaviour is in agreement with model calculations Schimmelpfennig et al, 2009) and measurements (Liu et al, 1994) that predict that the thermal neutron flux in granite increases with depth, reaching a maximum at between ~20-25 cm and declining at depths > 30 cm (Fig. 5).…”

Section: Depth Profilessupporting

confidence: 91%

“…The initial increase in the thermal neutron flux is due to the decreasing fraction of neutrons lost to the atmosphere with depth below the surface/atmosphere interface . That the results of model calculations (Phillips and Plummer, 1996;Schimmelpfennig et al, 2009) do not accurately agree with our experimental results is probably, at least partially, due to the finite dimensions of the experimental pile used (see discussion above, Section 3.1. ), whereas the concepts of the model calculations (Phillips and Plummer, 1996;Schimmelpfennig et al, 2009) implicitly assume an infinite surface.…”

Section: Depth Profilesmentioning

confidence: 53%

“…That the results of model calculations (Phillips and Plummer, 1996;Schimmelpfennig et al, 2009) do not accurately agree with our experimental results is probably, at least partially, due to the finite dimensions of the experimental pile used (see discussion above, Section 3.1. ), whereas the concepts of the model calculations (Phillips and Plummer, 1996;Schimmelpfennig et al, 2009) implicitly assume an infinite surface. For the purpose of this study it should suffice to note that the subsurface thermal neutron flux qualitatively behaves as predicted.…”

Section: Depth Profilesmentioning

confidence: 53%

See 2 more Smart Citations

The effects of a hydrogen-rich ground cover on cosmogenic thermal neutrons: Implications for exposure dating

Dunai

Binnie

Hein

et al. 2014

Quaternary Geochronology

View full text Add to dashboard Cite

The effects of a hydrogen-rich ground cover on cosmogenic thermal neutrons Publisher Rights Statement:This is the author's version of a work that was accepted for publication. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Quaternary Geochronology (2013) General rightsCopyright for the publications made accessible via the Edinburgh Research Explorer is retained by the author(s) and / or other copyright owners and it is a condition of accessing these publications that users recognise and abide by the legal requirements associated with these rights. Take down policyThe University of Edinburgh has made every reasonable effort to ensure that Edinburgh Research Explorer content complies with UK legislation. If you believe that the public display of this file breaches copyright please contact openaccess@ed.ac.uk providing details, and we will remove access to the work immediately and investigate your claim.

show abstract

Section: Depth Profilessupporting

confidence: 91%

Section: Depth Profilesmentioning

confidence: 53%

Section: Depth Profilesmentioning

confidence: 53%

See 1 more Smart Citation

The effects of a hydrogen-rich ground cover on cosmogenic thermal neutrons: Implications for exposure dating

Dunai

Binnie

Hein

et al. 2014

Quaternary Geochronology

View full text Add to dashboard Cite

show abstract

“…(Dunai, 2010). If the production rate of these new isotopes within the rock is known (Schimmelpfennig et al, 2011;Marrero, 2012), and when the concentration of cosmogenic isotopes are measured, then it is possible to determine how long these rocks have been exposed at the surface. The main landforms that this method can be applied to are moraines, alluvial fans, river terraces, fault planes and volcanic surfaces.…”

Section: Method: Cosmogenic Surface Exposure Datingmentioning

confidence: 99%

Late Pleistocene Glaciations and Paleoclimate of Turkey

Sarıkaya¹,

Çiner²

2015

Bulletin of the Mineral Research and Exploration

View full text Add to dashboard Cite

Glaciers respond quickly to climatic changes and thus they are considered to be very accurate indicators of changes in atmospheric conditions. Similarly, the extent of past glaciers gives valuable insights into paleoclimatic changes. For this purpose, we reviewed the paleo-glaciated mountains where cosmogenic surface exposure dating was applied in Turkey. We also evaluated the paleoclimatic results obtained from these studies to provide a regional overview. Twenty-seven mountains in Turkey are high enough to support Quaternary valley glaciers or ice caps. The timing of glaciations was reported mainly by cosmogenic dating of moraines. We re-evaluated the dated sites and recalculated some of the published cosmogenic ages using the up-to-date production rates. The oldest geochronological records reported from the region belong to the glaciations before the globally defined Last Glacial Maximum (LGM). These glaciers developed probably during the beginning of the last glaciation (MIS 4; 71 ka ago) and stopped advancing at the end of the MIS 3 (at 29-35 ka ago). Later, glaciers expanded and reached to their most extensive locations during MIS 2 (after 29 ka ago). They reached maximum extents between 21.5 ka ago and 18.5 ka ago. This local-LGM was synchronous with the global-LGM. After the LGM, the glaciers started to retreat to less extensive positions and deposited their moraines 16 ka ago during the Late Glacial. The Younger Dryas (~12 ka ago) advances were also reported from a limited number of mountains. Rare Early Holocene glaciations were dated to 8.5 ka in the interior regions. Late Holocene (1-4 ka ago) and Little Ice Age (between 1300-1850 AD) advances were also observed. We reconstructed the paleoclimate using glacier modeling together with paleoclimate proxy data from several regions. The results show that LGM climate was 8-11°C colder than today and moisture levels were 1.5 to 2 times in SW Turkey, somewhat similar to modern values in central parts and 30 % drier in the NE. The Late Glacial was colder by 4.5-6.4°C based on up to 50 % wetter conditions. The Early Holocene was 2.1-4.9°C colder and up to twice as wet as today, while the Late Holocene was 2.4-3°C colder and its precipitation amounts approached to similar conditions as today.

show abstract

“…The glacial chronologies of central Mexico presented here, for instance, are based on production rates of 36 Cl recently published by Marrero et al (2016). However, if other production rates are used (e.g., spallation from Ca as in Schimmelpfennig et al, 2011; spallation from K as in Schimmelpfennig et al, 2014), ages get older by 1-3 ka for samples within the LGM-early Holocene range. In addition, typical uncertainties for 36 Cl exposure ages range between 1 and 2 ka.…”

Section: Comparison With Other Glacial and Paleoclimate Recordsmentioning

confidence: 99%

The deglaciation of the mountains of Mexico and Central America

Vázquez-Selem

Lachniet

2017

CIG

View full text Add to dashboard Cite

ABSTRACT. The last deglaciation is an interval of marked changes in the climate system. The records of glaciation of tropical mountains offer unique opportunities to assess the timing of changes and the sensitivity of tropical climates to global and regional atmospheric phenomena. Here we summarize the existing knowledge on the glacial history of the highest mountains of the Trans Mexican Volcanic Belt (19.5°N) and Central America (Cuchumatanes in Guatemala, 15.5°N; Cerro Chirripó in Costa Rica, 9.5°N)

show abstract

Calibration of cosmogenic 36Cl production rates from Ca and K spallation in lava flows from Mt. Etna (38°N, Italy) and Payun Matru (36°S, Argentina)

Cited by 101 publications

References 53 publications

The effects of a hydrogen-rich ground cover on cosmogenic thermal neutrons: Implications for exposure dating

The effects of a hydrogen-rich ground cover on cosmogenic thermal neutrons: Implications for exposure dating

Late Pleistocene Glaciations and Paleoclimate of Turkey

The deglaciation of the mountains of Mexico and Central America

Contact Info

Product

Resources

About