ACE : Age Calculation Engine

3He Template The 3He Template File shows the minimum information required by ACE to import ³He samples, and lists a single sample (SI47) for example purposes. Using Excel or Openoffice you can add rows to this file using units given here. Additional sample attributes (for example erosion, or tectonic uplift rate) can also be added for each sample as additional columns.  Optional sample attributes are listed here, to use them you must add the variable name in the header exactly as listed. When ready to import into ACE, save as a Windows CSV file.

ACE Calibration Data. For easy access the calibration dataset which is used by default for 3He is given here:

3He Calibration Set

The dataset is from several different sources:

• Ackert et al., 2003, ‘Long-term cosmogenic ³He production rates from ⁴⁰Ar/³⁹Ar and K–Ar dated Patagonian lava flows at 47°S’, Earth and Planetary Science Letters (link).  Olivine samples only, does not include Clinopyroxene samples from Cerro Volcan.
• Dunai and Wijbrans, 2000, ‘Long-term cosmogenic ³He production rates (152 ka-1.35 Ma) from ⁴⁰Ar/³⁹Ar dated basalt flows at 29° N latitude’, Earth and Planetary Science Letters (link)
  
• Cerling and Craig, 1994, ‘Cosmogenic production rates of ³He from 39 to 46 °N latitude, western USA and France’, Geochimica et Cosmochimica Acta (link).
• Kurz et al, 1990, ‘Cosmic ray exposure dating with in situ produced cosmogenic ³He: Results from young Hawaiian lava flows’, Earth and Planetary Science Letters (link).
• Licciardi et al., 2006, ‘Cosmogenic ³He production rates from Holocene lava flows in Iceland’, Earth and Planetary Science Letters (link).
• Licciardi et al., 1999, ‘Calibration of cosmogenic ³He production rates from Holocene lava flows in Oregon, USA, and effects of the Earth’s magnetic field’, Earth and Planetary Science Letters (link).

Some notes about this calibration database:

• To show authorship of each sample we have used the ‘landform group‘ variable. To find which sample comes from which author, sort by landform group.
• For older (Cerling and Craig, 1994, Licciardi et al., 1999) records we have updated the published independent ages with new ages using CALIB Version 5. In order to preserve the record of the original cited age we have included them in the ‘published age’ section.

Blard et al., 2006, ‘Cosmogenic ³He production rates revisited from evidences of grain size dependent release of matrix-sited helium’, Earth and Planetary Science Letters (link).

• 3He Blard 2006

Note that samples with size < 0.14 mm are not included in this set. This data can also be used as an alternate calibration database for ³He, however the ages for the included Ainapo flow samples are not intended to calibrate absolute production rates.

Cerling et al., 1994, See ‘Multiple Nuclide Data’ Section

Foeken et al., 2009, ‘Cosmogenic 3He exposure dating of the Quaternary basalts from Fogo, Cape Verdes: Implications for rift zone and magmatic reorganisation’, Quaternary Geochronology (link).

• 3He Foeken 2009

If you would like to see your (or other, published) data listed here please email us.