English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

“Petrology, geochemistry and regional relationship of the Neoproterozoic-Cambrian units of the Sierra de Guasayán, Sierras Pampeanas Orientales, Northwest Argentina”. The Sierra de Guasayán is part of de Eastern Sierras Pampeanas, in the province of Santiago del Estero, NW Argentina, being mainly formed by several granite bodies emplaced in a regional low-grade metamorphic basement. The latter is represented by slates and phylites in the northern part of the range, whereas in the southern part, banded schists with quartz-feldspar veins are predominant. On the basis of their sedimentary, petrological and general stratigraphic relations, the metasedimentary units of the northern sector are related here to the Puncoviscana basin. Cordieritic hornfelds developed by thermal metamorphism have been recognized in the granitemetamorphites contact zone. The composition of the granitoids is mainly tonaliticgranodioritic to the north, and granitic-granodioritic to the south. They are mainly medium grained porphyritic textures, while there is common occurrence of small rounded to elongated xenoliths. Geochemically, granitoids are high-K2O calc-alkaline, weakly peraluminous with ASI values between 1.00 and 1.09. Normal trends of evolution are shown in the Harker diagram. The petrographic and geochemical uniformity of the granitic rocks suggests a common genetic source. Comparatively, the granitoids of Sierra de Guasayán are similar to the Cambrian-age Batolito de Tastil granitoids exposed to the north, in Cordillera Oriental, and partly to those of the Sierra de Ischilín and the Batolito Sierra Norte-Ambargasta, to the south. All Acta Geológica Lilloana 32 (1-2): 1–26, 7 de diciembre de 2020 3

acta geológica lilloana/acta geológica lilloana

Petrología, geoquímica y vinculación regional de las unidades neoproterozoicas-cámbricas de la Sierra de Guasayán, Sierras Pampeanas Orientales, Noroeste de Argentina