Geodynamic significance

Ebook "Geodynamic evolution of the Southernmost Andes: Connections with the Scotia Arc" focuses on the strong relation between the tectonic evolution of the Southernmost Andes and their closest southern neighbors, the Scotia Sea and Antarctica. Some episodes are related to processes of global significance such as the opening of the Drake Passage, which is somehow linked to Late Cenozoic cooling. Many of the topics covered in the book are subjects of heated debates; as such, not only the latest data and approaches are presented, but different points of view as well.

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They show high-K calc-alkaline affinity. On primitive-normalized spider diagrams, negative anomalies of Ba, Nb, Sr, P, and Ti and positive anomalies of Pb are noteworthy. Their chondrite-normalized REE patterns are characterized by strongly fractionated patterns with demonstrative negative Eu anomaly, whereby middle REE are not fractionated relative to the heavy REE. These geochemical features suggest a fractionating mineral assemblage of feldspar, apatite, and biotite without significant involvement of garnet.

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The Karaburun Peninsula, which is considered part of the Anatolide-Tauride Block of Turkey, contains clastic and carbonate sequences deposited on the northern margin of Gondwana. The Palaeozoic clastic sequence, which is intruded by the Early Triassic granitoid and tectonically overlies a Mesozoic mélange sequence, can be divided into three subunits: a lower clastic subunit consisting of a sandstone-shale alternation, an upper clastic subunit consisting of black chert-bearing shales, sandstone and conglomerate, and a Permo–Carboniferous carbonate subunit.

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The Foça-Karaburun and Ayvalık-Lesvos grabens (western coast of Anatolia, Turkey) are two important NW−SE-trending extensional areas generated in response to the Early Miocene−Holocene extension of the Western Anatolian region, related to the opening of the ‘unconventional’ back-arc basin of the Aegean Sea.

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