Petrogenesis and stratigraphy of the high-Ti/Y Urubici magma type in the Parana Flood Basalt Province and implications for the nature of 'Dupal'-type mantle in the South Atlantic Region

David W Peate; Chris J Hawkesworth; Nick W Rogers; Simon P Turner; Marta M.S Mantovani

doi:10.1093/petroj/40.3.451

Back

Petrogenesis and stratigraphy of the high-Ti/Y Urubici magma type in the Parana Flood Basalt Province and implications for the nature of 'Dupal'-type mantle in the South Atlantic Region

Journal article

Open access

Peer reviewed

Petrogenesis and stratigraphy of the high-Ti/Y Urubici magma type in the Parana Flood Basalt Province and implications for the nature of 'Dupal'-type mantle in the South Atlantic Region

David W Peate, Chris J Hawkesworth, Nick W Rogers, Simon P Turner and Marta M.S Mantovani

Journal of petrology, Vol.40(3), pp.451-473

1999

DOI: 10.1093/petroj/40.3.451

Files and links (1)

url

https://doi.org/10.1093/petroj/40.3.451View

Published (Version of record) Open Access

Abstract

The high-Ti/Y Urubici (or Khumib) magma type of the Paraná–Etendeka large igneous province has a restricted spatial extent, near the southeast Brazilian coast and in the northern Etendeka (Namibia). Urubici flows are interbedded with low-Ti/Y Gramado flows. Flow correlations indicate that local topographic relief was important in controlling emplacement of flows, and that lavas near the coast have undergone up to 1 km of post-magmatic uplift relative to inland areas. Urubici magmas have undergone extensive fractional crystallization (MgO <5.5 wt %). Stratigraphic variations highlight complexities of mixing and minor crustal assimilation indicative of open-system magmatic plumbing. The least contaminated samples have high La/Nb (∼1.5) and (Tb/Yb)

Details

Title: Subtitle: Petrogenesis and stratigraphy of the high-Ti/Y Urubici magma type in the Parana Flood Basalt Province and implications for the nature of 'Dupal'-type mantle in the South Atlantic Region
Creators: David W Peate
Chris J Hawkesworth
Nick W Rogers
Simon P Turner
Marta M.S Mantovani
Resource Type: Journal article
Publication Details: Journal of petrology, Vol.40(3), pp.451-473
DOI: 10.1093/petroj/40.3.451
ISSN: 0022-3530
eISSN: 1460-2415
Language: English
Date published: 1999
Academic Unit: Earth and Environmental Sciences; Honors Program
Record Identifier: 9983983668302771

Metrics

22 Record Views