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Amazon rift and Pisco-Juruá fault: Their relation to the separation of North America from Gondwana

1983; Geological Society of America; Volume: 11; Issue: 5 Linguagem: Inglês

10.1130/0091-7613(1983)11 2.0.co;2

1943-2682

Péter Szatmári,

Geological and Tectonic Studies in Latin America

Research Article| May 01, 1983 Amazon rift and Pisco-Juruá fault: Their relation to the separation of North America from Gondwana Peter Szatmari Peter Szatmari 1PETROBRÁS Research Center (CENPES), Rio de Janeiro, Brazil 21910 Search for other works by this author on: GSW Google Scholar Geology (1983) 11 (5): 300–304. https://doi.org/10.1130/0091-7613(1983)11 2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation Peter Szatmari; Amazon rift and Pisco-Juruá fault: Their relation to the separation of North America from Gondwana. Geology 1983;; 11 (5): 300–304. doi: https://doi.org/10.1130/0091-7613(1983)11 2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract The Amazon fault passes eastward from south of Guayaquil on the Pacific to the Amazon mouth on the Atlantic coast. Along its eastern segment, a rift with pyroxenite intrusions opened up at the start of Paleozoic time; its Early Jurassic reactivation produced more than 100,000 km3 of diabase sills, intruded into the evaporitic upper Paleozoic simultaneously with North Atlantic rifting. Pliocene reactivation faulted the coastal Tertiary and sheared the subducted slab beneath the Pacific end of the fault. The northeast-trending Pisco-Juruá fault, first described here, cuts across the continent from Pisco on the Pacific to the Guyana-Surinam border on the Atlantic coast. In early Mesozoic time the fault formed the southwestern continuation of the North Atlantic Rift; its Guyanan end opened up as the North Atlantic Rift opened. The separation of North and South America caused northwestern South America to move southwest along the Pisco-Juruá fault, creating the Tacutu graben in the Guyanan Shield, the gently folded Juruá zone across the Amazon Basin, and the Pisco-Abancay deflection in the Andes. Pliocene reactivation at the Pacific end of the fault sheared the subducted slab of the Nazca plate and may have contributed to the formation of the Nazca Ridge. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.