R. P. Ackert, B. S. Singer, H. Guillou, M. R. Kaplan, and M. D. Kurz, Long-term 616 cosmogenic 3 He production rates from 40 Ar/ 39 Ar and K-Ar dated Patagonian 617 lava flows at 47°S, Earth and Planetary Science Letters, vol.210, pp.119-136, 2003.

W. H. Amidon, D. H. Rood, and K. A. Farley, Cosmogenic 3 He and 21 Ne 619 production rates calibrated against 10 Be in minerals from the Coso volcanic 620 field, Earth and Planetary Science Letters, vol.280, pp.194-204, 2009.

W. H. Amidon and K. A. Farley, Cosmogenic 3 He production rates in apatite, 622 zircon and pyroxene inferred from Bonneville flood erosional surfaces, 2011.

, Quaternary Geochronology, vol.6, pp.10-21

S. W. Anderson and J. H. Fink, Crease structures: indicators of emplacement 625 rates and surface stress regimes of lava flows, Bulletin, vol.626, issue.5, pp.615-625, 1992.

S. W. Anderson, D. H. Krinsley, and J. H. Fink, Criteria for recognition of 628 constructional silicic lava flow surfaces, Earth Surface Processes and Landforms, vol.629, issue.6, pp.531-541, 1994.

J. Andrews, The isotopic composition of radiogenic helium and its use to 631 study groundwater movement in confined aquifers, Chemical Geology, vol.49, p.351, 1985.

J. Andrews and R. Kay, The U contents and 234 U/ 238 U activity ratios of 634 dissolved uranium in groundwaters from some Triassic sandstones in England, 1983.

, Chemical Geology, vol.41, pp.101-117

G. Balco, J. O. Stone, N. A. Lifton, and T. J. Dunai, A complete and easily 637 accessible means of calculating surface exposure ages or erosion rates from 638 10 Be and 26 Al measurements, Quaternary Geochronology, vol.3, pp.174-195, 2008.

P. Blard and K. Farley, The influence of radiogenic 4 He on cosmogenic 3 He 640 determinations in volcanic olivine and pyroxene, Earth and Planetary Science 641 Letters, vol.276, pp.20-29, 2008.

P. Blard, J. Lavé, F. Sylvestre, C. Placzek, C. Claude et al., , p.643

B. Tibari, Cosmogenic 3 He production rate in the high tropical Andes 644 (3800 m, 20°S): implications for the local last glacial maximum, Planetary Science Letters, vol.377, pp.260-275, 2013.

P. Blard, R. Braucher, J. Lavé, and D. Bourlès, Cosmogenic 10 Be production 647 rate calibrated against 3 He in the high Tropical Andes, 2013.

, Earth and Planetary Science Letters, vol.382, pp.140-149

P. H. Blard, D. Bourlès, J. Lavé, and R. Pik, Applications of ancient cosmic-ray 650 exposures: Theory, techniques and limitations, Quaternary Geochronology, vol.1, pp.59-651, 2006.

P. H. Blard, N. Puchol, and K. A. Farley, Constraints on the loss of matrix-sited 653 helium during vacuum crushing of mafic phenocrysts, Geochimica et, p.654, 2008.

, Cosmochimica Acta, vol.72, pp.3788-3803

B. Borchers, S. Marrero, G. Balco, M. Caffee, B. Goehring et al., Geological calibration of spallation 657 production rates in the CRONUS-Earth Project, Quaternary Geochronology, vol.31, pp.188-198, 2016.

T. E. Cerling and H. Craig, Cosmogenic 3 He production rates from 39°N to 46°N 660 latitude, western USA and France, Geochimica et cosmochimica Acta, vol.58, pp.249-661, 1994.

H. Craig and R. J. Poreda, Cosmogenic 3 He in terrestrial rocks: The summit 663 lavas of Maui, Proceedings of the National Academy of Sciences, vol.83, pp.1970-1974, 1986.

D. Desilets and M. Zreda, Spatial and temporal distribution of secondary 665 cosmic-ray nucleon intensities and applications to in situ cosmogenic dating. 666 Earth and Planetary, Science Letters, vol.206, pp.21-42, 2003.

D. Desilets, M. Zreda, and T. Prabu, Extended scaling factors for in situ 668 cosmogenic nuclides: New measurements at low latitude. Earth and Planetary 669, Science Letters, vol.246, pp.265-276, 2006.

D. Silva and S. , Altiplano-Puna volcanic complex of the central Andes, Geology, vol.671, pp.1102-1106, 1989.

T. J. Dunai, Influence of secular variation of the geomagnetic field on 673 production rates of in situ produced cosmogenic nuclides. Earth and Planetary 674, Science Letters, vol.193, pp.197-212, 2001.

T. J. Dunai, F. M. Stuart, R. Pik, P. Burnard, and E. Gayer, Production of 3 He in 676 crustal rocks by cosmogenic thermal neutrons, Earth and Planetary Science 677 Letters, vol.258, pp.228-236, 2007.

T. J. Dunai, Cosmogenic nuclides: principles, concepts and applications in 679 the earth surface sciences, 2010.

T. J. Dunai and J. R. Wijbrans, Long-term cosmogenic 3 He production rates (152 681 ka-1.35 Ma) from 40 Ar/ 39 Ar dated basalt flows at 29°N latitude. Earth and 682, Planetary Science Letters, vol.176, pp.147-156, 2000.

T. J. Dunai, F. M. Stuart, R. Pik, P. Burnard, and E. Gayer, Production of 3 He in 684 crustal rocks by cosmogenic thermal neutrons, Earth and Planetary Science 685 Letters, vol.258, pp.228-236, 2007.

T. J. Dunai and N. A. Lifton, The nuts and bolts of cosmogenic nuclide 687 production, Elements, vol.10, pp.347-350, 2014.

J. Dunne, D. Elmore, and P. Muzikar, Scaling factors for the rates of production 689 of cosmogenic nuclides for geometric shielding and attenuation at depth on 690 sloped surfaces, Geomorphology, vol.27, pp.3-11, 1999.

L. A. Evenstar, A. J. Hartley, F. M. Stuart, A. E. Mather, C. M. Rice et al., , 2009.

, Multiphase development of the Atacama Planation Surface recorded by 693 cosmogenic 3 He exposure ages: Implications for uplift and Cenozoic climate 694 change in western South America, Geology, vol.37, pp.27-30

K. Farley, B. Kohn, and B. Pillans, The effects of secular disequilibrium on, 2002.

, He systematics and dating of Quaternary volcanic zircon and apatite, Earth 697 and Planetary Science Letters, vol.201, pp.117-125

C. R. Fenton, D. F. Mark, D. N. Barfod, S. Niedermann, M. M. Goethals et al., 40 Ar/ 39 Ar dating of the SP and Bar Ten lava flows AZ, USA: Laying the 700 foundation for the SPICE cosmogenic nuclide production-rate calibration 701 project, Quaternary Geochronology, vol.699, pp.158-172, 2013.

C. R. Fenton and S. Niedermann, Surface exposure dating of young basalts (1-703 200 ka) in the San Francisco volcanic field (Arizona, USA) using cosmogenic 3 He 704 and 21 Ne, Quaternary Geochronology, vol.19, pp.87-105, 2014.

J. P. Foeken, F. M. Stuart, and D. F. Mark, Long-term low latitude cosmogenic 706 3 He production rate determined from a 126 ka basalt from Fogo, Cape Verdes. 707 Earth and Planetary Science Letters 359-360, pp.14-25, 2012.

P. W. Francis, M. J. Roobol, G. P. Walker, P. R. Cobbold, and M. Coward, The 709, 1974.

, San Pedro and San Pablo volcanoes of northern Chile and their hot avalanche 710 deposits, Geol Rundsch, vol.63, pp.357-388

J. Giese, D. Seward, F. M. Stuart, E. Wüthrich, E. Gnos et al., , p.712

G. Schreurs, Electrodynamic Disaggregation: Does it Affect Apatite 713 Fission-Track and (U-Th)/He Analyses? Geostandards and Geoanalytical 714, Research, vol.34, pp.39-48, 2010.

B. M. Goehring, M. D. Kurz, G. Balco, J. M. Schaefer, J. Licciardi et al., A 716 reevaluation of in situ cosmogenic 3 He production rates, Quaternary 717 Geochronology, vol.5, pp.410-418, 2010.

D. Hilton, K. Hammerschmidt, S. Teufel, and H. Friedrichsen, Helium isotope 719 characteristics of Andean geothermal fluids and lavas. Earth and Planetary 720, Science Letters, vol.120, pp.265-282, 1993.

J. M. Hora, B. S. Singer, and G. Wörner, Volcano evolution and eruptive flux on 722 the thick crust of the Andean Central Volcanic Zone: 40 Ar/ 39 Ar constraints from 723 Volcán Parinacota, Chile. Geol. Soc. Am. Bull, vol.119, pp.343-362, 2007.

J. Houston and A. J. Hartley, The central Andean west-slope rainshadow and 725 its potential contribution to the origin of hyper-aridity in the Atacama Desert, International Journal of Climatology, vol.726, issue.12, pp.1453-1464, 2003.

A. A. Koppers, ArArCALC-software for 40 Ar/39 Ar age calculations, 2002.

, Computers & Geosciences, vol.28, pp.605-619

K. Kuiper, A. Deino, F. Hilgen, W. Krijgsman, P. Renne et al., 730 Synchronizing rock clocks of Earth history, Science, vol.320, pp.500-504, 2008.

M. D. Kurz, In situ production of terrestrial cosmogenic helium and some 732 applications to geochronology, Geochimica et Cosmochimica Acta, vol.50, pp.2855-733, 1986.

M. D. Kurz, D. Colodner, T. W. Trull, R. B. Moore, and K. O'brien, Cosmic ray 735 exposure dating with in situ produced cosmogenic 3 He: results from young 736 Hawaiian lava flows, Earth and Planetary Science Letters, vol.97, pp.177-189, 1990.

C. Laj, C. Kissel, and J. Beer, High Resolution Global Paleointensity Stack Since 738 75 kyr (GLOPIS-75) Calibrated to Absolute Values. Timescales of the 739 Paleomagnetic Field, pp.255-265, 2004.

D. Lal, Cosmic ray labelling of erosion surfaces: in situ nuclide production 741 rates and erosion models, Earth and Planetary Science Letters, vol.104, pp.424-439, 1991.

J. Lee, K. Marti, J. P. Severinghaus, K. Kawamura, H. Yoo et al., A redetermination of the isotopic abundances of atmospheric Ar, vol.743, 2006.

, Geochimica et Cosmochimica Acta, vol.70, pp.4507-4512

J. Licciardi, M. Kurz, P. Clark, and E. Brook, Calibration of cosmogenic 3 He 746 production rates from Holocene lava flows in Oregon, USA, and effects of the 747 Earth's magnetic field, Earth and Planetary Science Letters, vol.172, pp.261-271, 1999.

J. Licciardi, M. Kurz, and J. Curtice, Cosmogenic 3 He production rates from 749 Holocene lava flows in Iceland, Earth and Planetary Science Letters, vol.246, pp.251-750, 2006.

N. A. Lifton, J. W. Bieber, J. M. Clem, M. L. Duldig, P. Evenson et al., Addressing solar modulation and long-term uncertainties in scaling 753 secondary cosmic rays for in situ cosmogenic nuclide applications, Planetary Science Letters, vol.752, pp.140-161, 2005.

N. Lifton, T. Sato, and T. J. Dunai, Scaling in situ cosmogenic nuclide production 756 rates using analytical approximations to atmospheric cosmic-ray fluxes, Planetary Science Letters, vol.757, pp.149-160, 2014.

N. Lifton, Implications of two Holocene time-dependent geomagnetic 759 models for cosmogenic nuclide production rate scaling. Earth and Planetary 760, Science Letters, vol.433, pp.257-268, 2016.

K. Ludwig, User manual for Isoplot 3.0, Berkeley Geochronology Center 762 Special Publication, vol.4, 2003.

J. Masarik and R. Reedy, Monte Carlo simulation of in-situ-produced 764 cosmogenic nuclides, Radiocarbon, vol.38, pp.163-164, 1996.

L. C. Martin, P. H. Blard, J. Lavé, R. Braucher, M. Lupker et al., situ cosmogenic 10 Be production rate 767 in the High Tropical Andes, vol.30, pp.54-68, 2015.

J. Matsuda, T. Matsumoto, K. Sumino, K. Nagao, J. Yamamoto et al., , p.769

I. Kaneoka, N. Takahata, and Y. Sano, The 3 He/ 4 He ratio of the new internal 770 He standard of Japan (HESJ), Geochemical Journal, vol.36, pp.191-195, 2002.

R. Muscheler, J. Beer, P. W. Kubik, and H. Synal, Geomagnetic field intensity 772 during the last 60,000 years based on 10 Be and 36 Cl from the Summit ice cores 773 and 14 C, Quaternary Science Reviews, vol.24, pp.1849-1860, 2005.

S. Nomade, P. Renne, N. Vogel, A. Deino, W. Sharp et al., Alder Creek sanidine (ACs-2): a Quaternary 40 Ar/ 39 Ar dating standard 778 tied to the Cobb Mountain geomagnetic event, Chemical Geology, vol.218, pp.315-338, 1976.

S. Nomade, A. Gauthier, H. Guillou, and J. Pastre, 40 Ar/ 39 Ar temporal 780 framework for the Alleret maar lacustrine sequence, Quaternary Geochronology, vol.5, pp.20-782, 2010.

L. J. O'callaghan and P. W. Francis, , p.784, 1986.

. San-pedro-volcano, E. I. Provincia, N. Loa, and . Chile, Journal of the Geological 785 Society, vol.143, pp.275-286

F. M. Phillips, D. C. Argento, D. L. Bourlès, M. W. Caffee, T. J. Dunai et al., , p.787

J. C. Gosse, A. M. Hudson, A. T. Jull, and M. Kelly, Where now? Reflections on 788 future directions for cosmogenic nuclide research from the CRONUS Projects, 2016.

, Quaternary Geochronology, vol.31, pp.155-159

P. R. Renne, G. Balco, K. R. Ludwig, R. Mundil, K. ;. Min et al., Joint determination of 40 K decay constants 792 and 40 Ar * /40 K for the Fish Canyon sanidine standard, and improved accuracy 793 for 40 Ar/39 Ar geochronology, Geochimica et, p.794, 2010.

, Cosmochimica Acta, vol.75, pp.5097-5100

P. Scarsi, Fractional extraction of helium by crushing of olivine and 796 clinopyroxene phenocrysts: effects on the 3 He/ 4 He measured ratio. Geochimica 797 et, Cosmochimica Acta, vol.64, pp.3751-3762, 2000.

J. M. Schäfer, S. Ivy-ochs, R. Wieler, I. Leya, H. Baur et al., Cosmogenic noble gas studies in the oldest landscape on earth: surface 800 exposure ages of the Dry Valleys, Antarctica. Earth and Planetary Science Letters, vol.799, pp.215-226, 1999.

, Reported errors (1?) integrate ca. 3% uncertainty on 3 Het measurements and 10% and 31% uncertainties on nucleogenic and magmatic contribution estimates, respectively. f Local cosmogenic 3 He production rates estimated from 3 Hec concentrations scaled to the surface, an open-sky topography and 21.934°S-68.510°W and 3390 m a.s.l. and the age of the lava based on the 40 Ar/ 39 Ar dating. Bracketed values correspond to external errors (1?) and include the ca