RT Journal Article
T1 Tectonically-induced icehouse-greenhouse climate oscillations during the transition from the Variscan to the Alpine cycle (Carboniferous to Triassic)
A1 Oyarzun Muñoz, Roberto
A1 Doblas Lavigne, Miguel Manuel Delas
AB Remarkable global climate oscillations were recorded during the timespan middle Carboniferous-Triassic, which allows definition of two cold (icehouse 1: middle Carboniferous; icehouse 2: early Permian) and two warm episodes (greenhouse 1: late Carboniferous-earliest Permian; greenhouse 2: middle Permian-Triassic). The tectonic evolution of the central Pangean realm from Variscan to late Variscan, and finally to early Alpine offers an explanation for these climate oscillations, in terms of mountain building, extensional collapse, rifting, epeirogeny, volcanism, erosion, and exhumation. The cold periods were associated with orogenic (icehouse 1) or epeirogenic (icehouse 2) movements leading to uplift and erosion, and therefore, to CO 2 output from the atmosphere. On the contrary, the warm periods were related to extension-related phenomena, such as volcanism, deep- and shallow-seated hydrothermal activity, unroofing of large-scale metamorphic core-complexes (greenhouse 1), or vast exhumation of coal and peat deposits and volcanism (greenhouse 2), all of them processes leading to massive input of CO 2 into the atmosphere, hence, to global warming.
PB Société Géologique de France
SN 0037-9409
YR 1999
FD 1999
LK https://hdl.handle.net/20.500.14352/114481
UL https://hdl.handle.net/20.500.14352/114481
LA eng
NO Roberto Oyarzun, Miguel Doblas, Jose Lopez Ruiz, Jose-Maria Cebria, Nasreddine Youbi; Tectonically-induced icehouse-greenhouse climate oscillations during the transition from the Variscan to the Alpine cycle (Carboniferous to Triassic). Bulletin de la Société Géologique de France 1999; 170 (1): 3–11.
NO European Union
NO Dirección General de Enseñanza Superior (España)
NO Centre National de Coordination et de Planification de la Recherche scientifique et Technique (Marruecos)
NO Consejo Superior de Investigaciones Científicas (España)
DS Docta Complutense
RD 8 abr 2025