Cosmogenic 3He and 21Ne dating of young basaltic lavas from southern Mendoza, Argentina

Geochronology of the late Pliocene to recent volcanic activity in the Payenia back-arc volcanic province, Mendoza Argentina

“…The obtained ages from the Llancanelo volcanic field are younger than the dated rocks from the Nevado volcanic field and this is in accordance with the Middle-Late Pleistocene age estimated from morphology by Bermúdez et al (1993) and from two previous age determinations of 0.40 AE 0.14 Ma and with an age below detection (Españon, 2010). An age of 1.7 AE 0.6 Ma reported by Españon (2010) for Cerro Coral just east of Lake Llancanelo is considered to belong to the Nevado volcanic field.…”

“…An age of 1.7 AE 0.6 Ma reported by Españon (2010) for Cerro Coral just east of Lake Llancanelo is considered to belong to the Nevado volcanic field.…”

“…A lava from the Los Volcanes area with similar degree of alteration as the Mollar basalts from the Pampas Negras area had a similar age of 26 AE 10 ka which is probably representative for the youngest of the Los Volcanes flows reaching the Rute 40. The youngest activity in the Pampas Negras and Los Volcanes area is known as the Media Luna basalts (Llambías, 1966) of Late Holocene age (Españon, 2010). A few scattered occurrences of older lava flows in the area north of Los Volcanes and Pampas Negras are found and one was dated by Quidelleur et al (2009) to 1.72 AE 0.05 Ma.…”

“…The inset shows the location of the studied area in South America; CR is the Chile Ridge, CFZ the Challenger fracture zone, and CT the Chile trench. Data sources: this work, Kay et al (2006a), Folguera et al (2009), Germa et al (2010) Quidelleur et al, 2009, and Españon (2010. (For interpretation of the references to color in this figure legend, the reader is referred to the web version of this article.…”

Scale of human mobility in northwestern Patagonia: An approach based on regional geology and strontium isotopes in human remains

“…The main task ahead lies in a thorough characterization of isotopic variability across this complex geological landscape, not only in northwestern Patagonia but also in southern Mendoza, La Pampa, and Río Negro Provinces, and the western Andean shed. For instance, a comparison of the results on bioavailable strontium presented here for Neuquén with those from the neighboring Payunia volcanic field in southern Mendoza, largely dominated by recently deposited basic volcanic rocks (Españon, 2010), holds great potential for discriminating human groups inhabiting on both sheds of the Colorado River. In doing this, we will be able to bridge the systematic information that is being produced northward for an Andean transect in northern Mendoza and Central Chile (Barberena et al, 2020) and southward in Río Negro Province (Serna et al, 2020).…”