Oligocene-Miocene age of aridity in the Atacama Desert revealed by exposure dating of erosion-sensitive landforms

Geology

Volumn 33, Issue 4, 2005, Pages 321-324

  Dunai, Tibor J ^a   González López, Gabriel A ^b   Juez Larré, Joaquim ^a  

^a VU UNIVERSITY AMSTERDAM   (Netherlands)

^b UNIVERSIDAD CATÓLICA DEL NORTE   (Chile)

Author keywords

Andes; Atacama Desert; Climate change; Desertification; Erosion; Exposure age

Indexed keywords

ARIDITY; MIOCENE; OLIGOCENE; SEDIMENT SURFACE;

ARID REGIONS; EARTH (PLANET); EROSION; LANDFORMS; NEON; SEDIMENTS; SURFACE PROPERTIES;

GEOLOGY;

ARIDITY; CLIMATE CHANGE; DESERTIFICATION; MIOCENE; OLIGOCENE; PALEOENVIRONMENT;

ATACAMA DESERT; CHILE; SOUTH AMERICA; WESTERN HEMISPHERE; WORLD;

EID: 17144396711     PISSN: 00917613     EISSN: None     Source Type: Journal    
DOI: 10.1130/G21184.1     Document Type: Article

References (19)

1. Allmendinger, R.W., Gonzalez, G., Yu, J., Hoke, G., and Isacks, B., 2005, Trench-parallel shortening in the northern Chilean forearc: Tectonic and climatic implications: Geological Society of America Bulletin (in press).
2. Alpers, C.N., and Brinihall, G.H., 1988, Middle Miocene climatic change in the Atacama Desert, northern Chile: Evidence from supergene mineralization at La Escondia: Geological Society of America Bulletin, v. 100, p. 1640-1656, doi: 10.1130/0016-7606(1988)1002.3.CO;2.
3. Bouzari, F., and Clark, A.H., 2002, Anatomy, evolution, and metallogenic significance of the supergene orebody of the Cerro Colorado porphyry copper deposit, I region, northern Chile: Economic Geology, v. 97, p. 1701-1740.
4. Hartley, A.J., and Chong, G., 2002, Late Pliocene age for the Atacama Desert: Implications for the desertification of western South America: Geology, v. 30, p. 43-46, doi: 10.1130/0091-7613(2002)0302.0.CO;2.
5. Houston, J., and Hartley, A.J., 2003, The Central Andean west-slope rainshadow and its potential contribution to the origin of hyper-aridity in the Atacama Desert: International Journal of Climatology, v. 23, p. 1453-1464, doi: 10.1002/joc.938.
6. Lamb, S., and Davis, P., 2003, Cenozoic climate change as a possible cause for the rise of the Andes: Nature, v. 425, p. 792-797, doi: 10.1038/nature02049.
7. McKay, C.P., Friedmann, E.I., Gomez-Silva, B., Carceres-Villanueva, L., Andersen, D.T., and Landheim, R., 2003, Temperature and moisture conditions for life in the extreme and region of the Atacama Desert: Four years of observation including the El Niño of 1997-1998: Astrobiology, v. 3, p. 393-406, doi: 10.1089/153110703769016460.
8. Mortimer, C., Ferrar T.E., and Saric, N., 1974, K-Ar ages from Tertiary lavas of the northernmost Chilean Andes: Geologische Rundschau, v. 63, p. 484-490.
9. Noble, D.C., Sebrier, M., Megard, F., and McKee, E.H., 1985, Demonstration of two pulses of Paleogene deformation in the Andes of Peru: Earth and Planetary Science Letters, v. 73, p, 345-349, doi: 10.1016/ 0012-821X(85)90082-2.
10. Repka, J.L., Anderson, R.S., and Finkel, R.C., 1997, Cosmogenic dating of fluvial terraces, Fremont River, Utah: Earth and Planetary Science Letters, v. 152, p. 59-73, doi: 10. 1016/S0012-821X(97)00149-0.
11. Schäfer, J.M., Ivy-Ochs, S., Wieler, R., Leya, I., Baur, H., Denton, G.H., and Schlüchter, C., 1999, Cosmogenic noble gas studies in the oldest landscape on Earth: Surface exposure ages of the Dry Valleys, Antarctica: Earth and Planetary Science Letters, v. 167, p. 215-226, doi: 10.1016/S0012-821X(99)00029-1.
12. Sillitoe, R.H., and McKee, E.H., 1996, Age of supergene oxidation and enrichment in the Chilean porphyry copper province: Economic Geology, v. 91, p. 164-179.
13. Tosdal, R.M., Clark, A.H., and Ferrar, E., 1984, Cenozoic polyphase landscape and tectonic evolution of the Cordillera Occidental, southernmost Peru: Geological Society of America Bulletin, v. 95, p.1318-1332.
14. Van der Wateren, F.M., and Dunai, T.J., 2001, Late Neogene passive margin denudation history: Cosmogenic isotope measurements from the Central Namib Desert: Global and Planetary Change, v. 30, p. 271-307, doi: 10.1016/S0921-8181(01)00104-7.
15. Van der Wateren, F.M., Dunai, T.J., Van Balen, R.T., Klas, W., Verbers, A.L.L.M., Passchier, S., and Herpers, U., 1999, Contrasting Neogene denudation histories of different structural regions in the Transantarctic Mountains rift flank constrained by cosmogenic isotope measurements: Global and Planetary Change, v. 23, p. 145-172, doi: 10. 1016/S0921-8181(99)00055-7.
16. 39Ar and K-Ar analysis of supergene K-Mn oxides: Geochimica et Cosmochimica Acta, v. 58, p. 1635-1665, doi: 10.1016/ 0016-7037(94)90565-7.
17. Wörner, G., Uhlig, D., Kohler, I., and Seyfried, H., 2002, Evolution of the West Andean Escarpment at 18°S (N. Chile) during the last 25 Ma: Uplift, erosion and collapse through time: Tectonophysics, v. 345, p. 183-198, doi: 10.1016/S0040-1951(01)00212-8.
18. Zachos, J., Pagani, M., Sloan, L., Thomas, E., and Billups, K., 2001a, Trends, rhythms and aberrations in global climate 65 Ma to present: Science, v. 292, p. 686-693, doi: 10.1126/science.1059412.
19. Zachos, J.C., Shackleton, N.J., Ravenaugh, J.S., Pälike, H., and Flower, B.P, 2001b, Climate response to orbital forcing across the Oligocene-Miocene boundary: Science, v. 292, p. 274-278, doi: 10.1126/ science. 1058288.