Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A.
During Triassic time, in the proto-North Atlantic area, the late Palaeozoic fracture system, inherited from the building of Pangea supercontinent, was reactivated. Rifting and breakup of Pangea, initiated during the early Triassic, continued and intensified at the beginning of the Norian. After few...
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2009
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ftunivpadovairis:oai:www.research.unipd.it:11577/3426069 2024-04-14T08:16:12+00:00 Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A. Cuppone, Tiberio Artioli, Gilberto Cuppone, Tiberio 2009 http://hdl.handle.net/11577/3426069 eng eng Università degli studi di Padova numberofpages:302 alleditors:Artioli, Gilberto http://hdl.handle.net/11577/3426069 info:eu-repo/semantics/openAccess CAMP LIP Morocco magnetostratigraphy 40Ar/39Ar dating Settore GEO/07 - Petrologia e Petrografia info:eu-repo/semantics/doctoralThesis 2009 ftunivpadovairis 2024-03-21T20:00:03Z During Triassic time, in the proto-North Atlantic area, the late Palaeozoic fracture system, inherited from the building of Pangea supercontinent, was reactivated. Rifting and breakup of Pangea, initiated during the early Triassic, continued and intensified at the beginning of the Norian. After few million years later, a massive magmatic event, namely CAMP (Central Atlantic Magmatic Province), occurred in the rifted and inside the cratonic areas, covering more than 10 millions kilometers square, leaving its products on 4 continents: North and South America, southwest Europe and west Africa. The main magmatic event occurred at ca 199-200 Ma near the Triassic-Jurassic boundary (Tr-J) with two minor secondary pulses al ca. 195 Ma and 192 Ma. The time spanned by the main magmatic event is very short, probably less than 1 Ma (ca. 610 Ka based on Milankovitch cyclostratigraphy), and the tight occurrence with one of great extinctions events in the Phanerozoic time and the climatic crisis and biotic turnover demarcating the Tr-J, led to the intriguing hypothesis that CAMP magmatism triggered these global events. At present the CAMP magmatism is represented by tholeiitic dikes, sills and minor amounts of lava flows, deeply eroded and in few places well preserved, being due to the subtropical palaeogeographic position of the basaltic outcrops which led to heavy weathering. Most of the CAMP basalts throughout circum-Atlantic domain have quite homogeneous compositions, with low-Ti (TiO<2wt.%) except for high-Ti dyke storms documented in Liberia, French Guyana and northern Brazil, strong Nb-Ta(PM) negative anomaly, enriched in light earth rare elements (LREE) and large ion lithophile elements (LILE) respect to the common normal mid-ocean ridge basalts. The purpose of this work is to describe and correlate 6 CAMP volcanic sequences in three different Morocco regions (three in the Central High Atlas, two in the Middle Atlas and one in the Western Meseta) on the base of a ... Doctoral or Postdoctoral Thesis North Atlantic Padua Research Archive (IRIS - Università degli Studi di Padova) |
institution |
Open Polar |
collection |
Padua Research Archive (IRIS - Università degli Studi di Padova) |
op_collection_id |
ftunivpadovairis |
language |
English |
topic |
CAMP LIP Morocco magnetostratigraphy 40Ar/39Ar dating Settore GEO/07 - Petrologia e Petrografia |
spellingShingle |
CAMP LIP Morocco magnetostratigraphy 40Ar/39Ar dating Settore GEO/07 - Petrologia e Petrografia Cuppone, Tiberio Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A. |
topic_facet |
CAMP LIP Morocco magnetostratigraphy 40Ar/39Ar dating Settore GEO/07 - Petrologia e Petrografia |
description |
During Triassic time, in the proto-North Atlantic area, the late Palaeozoic fracture system, inherited from the building of Pangea supercontinent, was reactivated. Rifting and breakup of Pangea, initiated during the early Triassic, continued and intensified at the beginning of the Norian. After few million years later, a massive magmatic event, namely CAMP (Central Atlantic Magmatic Province), occurred in the rifted and inside the cratonic areas, covering more than 10 millions kilometers square, leaving its products on 4 continents: North and South America, southwest Europe and west Africa. The main magmatic event occurred at ca 199-200 Ma near the Triassic-Jurassic boundary (Tr-J) with two minor secondary pulses al ca. 195 Ma and 192 Ma. The time spanned by the main magmatic event is very short, probably less than 1 Ma (ca. 610 Ka based on Milankovitch cyclostratigraphy), and the tight occurrence with one of great extinctions events in the Phanerozoic time and the climatic crisis and biotic turnover demarcating the Tr-J, led to the intriguing hypothesis that CAMP magmatism triggered these global events. At present the CAMP magmatism is represented by tholeiitic dikes, sills and minor amounts of lava flows, deeply eroded and in few places well preserved, being due to the subtropical palaeogeographic position of the basaltic outcrops which led to heavy weathering. Most of the CAMP basalts throughout circum-Atlantic domain have quite homogeneous compositions, with low-Ti (TiO<2wt.%) except for high-Ti dyke storms documented in Liberia, French Guyana and northern Brazil, strong Nb-Ta(PM) negative anomaly, enriched in light earth rare elements (LREE) and large ion lithophile elements (LILE) respect to the common normal mid-ocean ridge basalts. The purpose of this work is to describe and correlate 6 CAMP volcanic sequences in three different Morocco regions (three in the Central High Atlas, two in the Middle Atlas and one in the Western Meseta) on the base of a ... |
author2 |
Artioli, Gilberto Cuppone, Tiberio |
format |
Doctoral or Postdoctoral Thesis |
author |
Cuppone, Tiberio |
author_facet |
Cuppone, Tiberio |
author_sort |
Cuppone, Tiberio |
title |
Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A. |
title_short |
Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A. |
title_full |
Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A. |
title_fullStr |
Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A. |
title_full_unstemmed |
Camp Volcanism: age, volcanic stratigraphy and origin of the magmas. Cases studies from Morocco and the U.S.A. |
title_sort |
camp volcanism: age, volcanic stratigraphy and origin of the magmas. cases studies from morocco and the u.s.a. |
publisher |
Università degli studi di Padova |
publishDate |
2009 |
url |
http://hdl.handle.net/11577/3426069 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
numberofpages:302 alleditors:Artioli, Gilberto http://hdl.handle.net/11577/3426069 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1796314799032762368 |