Paleozoic terranes of the central Argentine‐Chilean Andes

  title={Paleozoic terranes of the central Argentine‐Chilean Andes},
  author={V{\'i}ctor A. Ramos and Teresa E. Jordan and Richard W. Allmendinger and Constantino Mpodozis and Suzanne Kay and Jos{\'e} Mar{\'i}a Cort{\'e}s and Miguel Palma},
The recognition of accreted terranes and their importance in orogenesis has spurred the search for allochthonous fragments along the western and southern margins of South America. Here we present stratigraphic and petrologic data from Chile and Argentina between 29° and 33°S latitude that demonstrate the “suspect” nature of several major terranes, which we infer to have been accreted during the Paleozoic. Three lower-middle Paleozoic terranes are described (from east to west): (1) the Pampeanas… 

Accretion of Grenvillian terranes to the southwestern border of the Río de la Plata craton, western Argentina

A comprehensive review of the geological, geochronological, and isotopic features of the Mesoproterozoic Grenvillian terranes attached to the southwest of the Río de la Plata craton in Early

The nature of the Palaeozoic oceanic basin at the southwestern margin of Gondwana and implications for the origin of the Chilenia terrane (Pichilemu region, central Chile)

The Coastal Accretionary Complex of central Chile constitutes the product of early Carboniferous to Late Triassic subduction at the rear of Chilenia, a continental terrane likely derived from

Geodynamic evolution and tectonostratigraphic terranes of northwestern Argentina and northern Chile

In Ordovician time, Gondwana in the area of northwestern Argentina and northern Chile had a west-facing active margin. The evolution of this margin culminated in the Ocloyic orogeny at the end of

Mafic and ultramafic crustal fragments of the southwestern Precordillera terrane and their bearing on tectonic models of the early Paleozoic in western Argentina

New U-Pb zircon ages and initial Nd isotope data from mafic and ultramafic rocks that have been tectonically imbricated on the southwest margin of the Precordillera terrane, western Argentina,

The country rocks of Devonian magmatism in the North Patagonian Massif and Chaitenia

Previous work has shown that Devonian magmatism in the southern Andes occurred in two contemporaneous belts: one emplaced in the continental crust of the North Patagonian Massif and the other in an

Igneous Rock Associations 25. Pre-Pliocene Andean Magmatism in Chile

Andean-type magmatism and the term ‘andesite’ are often used as the norm for the results of subduction of oceanic lithosphere under a continent, and the typical rock formed. Although the Andes chain



The late Palaeozoic to early Mesozoic evolution of southern South America: a plate tectonic interpretation

  • R. Forsythe
  • Geology, Geography
    Journal of the Geological Society
  • 1982
The limits of 3 distinct upper Palaeozoic to lower Mesozoic tectono-stratigraphic zones of the ancestral Pacific margin of Gondwana in southern South America are documented. These are: a fore-arc

Paleogeography and Andean structural geometry, northwest Argentina

Neogene tectonic segmentation of the Andean Cordillera in northwestern Argentina is a function of both the dip of the subducted plate and of major paleogeographic structures and sedimentary basins.

Collision and Cordilleran orogenesis: an Andean perspective

  • I. Dalziel
  • Geology
    Geological Society, London, Special Publications
  • 1986
Summary The Andean Cordillera is the result of interaction between oceanic lithosphere, forming the floor of the Pacific Ocean Basin, and S American lithosphere during the Mesozoic and Cenozoic.

Evidence for a Western Extracontinental Land Source During the Devonian Period in the Central Andes

A large intracratonic sedimentary basin of mid-Paleozoic age in the central Andes apparently received sediments from a western land source. Lithofacies and isopach data show a thickening and general

Geodynamic and magmatic stages on a traverse through the Andes between 20° and 24°S (N Chile,S Bolivia, NW Argentina)

Metamorphic Precambrian basement is exposed in the Chilean Pre-Cordillera in the form of a narrow horst, and also in the Argentinian Puna. Miogeosynclinal pelites and psammites of Devonian age

Paleogene evolution of the Kodiak Islands, Alaska: Consequences of ridge‐trench interaction in a more southerly latitude

The Kodiak Islands of Alaska are principally composed of a Late Cretaceous and Paleogene complex of accreted deep-sea rocks. An early Paleocene magmatic event invaded the accretionary complex with