New heat flow measurements in Oman and the thermal state of the Arabian Shield and Platform

Rolandone, F.; Lucazeau, Francis; Leroy, Sylvie; Mareschal, Jean‐Claude; Jorand, R.; Goutorbe, Bruno; Bouquerel, Hélène

doi:10.1016/j.tecto.2012.12.034

Cited by 37 publications

(24 citation statements)

References 75 publications

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“…and Rolandone et al (2013) and peak-burial temperatures determined by Raman spectroscopy and solid bitumen 318 reflectance data (Table 1). From surface samples and their position in the stratigraphic column various pseudo-319 wells were created (e.g.…”

Section: Numerical Basin Modeling 279mentioning

confidence: 99%

Tectono-thermal evolution of Oman's Mesozoic passive continental margin under the obducting Semail Ophiolite: a case study Jebel Akhdar, Oman

Grobe¹,

Hagke²,

Littke³

et al. 2018

Preprint

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Abstract. The Mesozoic sequences of the Oman Mountains experienced only weak post-obduction overprint and 15deformation, thus they offer a unique natural laboratory to study obduction. We present a study of the pressure and 16 temperature evolution in the passive continental margin under the Oman Ophiolite, using numerical basin models 17 calibrated with thermal maturity data, fluid inclusion thermometry and low-temperature thermochronology. Solid Earth Discuss., https://doi

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Section: Numerical Basin Modeling 279mentioning

confidence: 99%

Tectono-thermal evolution of Oman's Mesozoic passive continental margin under the obducting Semail Ophiolite: a case study Jebel Akhdar, Oman

Grobe¹,

Hagke²,

Littke³

et al. 2018

Preprint

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“…An important delay occurred between the onset of plate convergence at ∼83 Ma, (chron A34) used in plate reconstructions (Rosenbaum et al, 2002) and the exhumation in the belt recorded from ∼50 Ma to ∼20 Ma, as constrained by low-temperature thermochronological data mainly in the Axial Zone (Yelland, 1990(Yelland, , 1991Morris et al, 1998;Fitzgerald et al, 1999;Sinclair et al, 2005;Jolivet et al, 2007;Maurel et al, 2008;Gunnel et al, 2009;Metcalf et al, 2009). Time-temperature history (burial, heating and cooling) during the initial accretionary stage are therefore largely unknown.…”

Section: Hyper-extension In the Pyrenees And Thermal Constraintsmentioning

confidence: 99%

Thermal imprint of rift-related processes in orogens as recorded in the Pyrenees

Vacherat

Mouthereau

Pik

et al. 2014

Earth and Planetary Science Letters

106

152

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International audience19 The extent to which heat recorded in orogens reflects thermal conditions inherited from 20 previous rift-related processes is still debated and poorly documented. As a case study, we 21 examine the Mauléon basin in the north-western Pyrenees that experienced both extreme 22 crustal thinning and tectonic inversion within a period of ~30 Myrs. To constrain the time-23 temperature history of the basin in such a scenario, we provide new detrital zircon fission-24 track and (U-Th-Sm)/He thermochronology data. The role of rift-related processes in 25 subsequent collision is captured by inverse modeling of our thermochronological data, using 26 relationships between zircon (U-Th-Sm)/He ages and uranium content, combined with 27 thermo-kinematic models of a rift-orogen cycle. We show that the basin recorded significant 28 heating at about 100 Ma characterized by high geothermal gradients (~80°C/km). Our 29 thermo-kinematic modeling and geological constraints support the view that subcontinental 30 lithospheric mantle was exhumed at that time below the Mauléon basin. Such a high 31 geothermal gradient lasted 30 Myr after onset of convergence at ~83 Ma and was relaxed 32 during the collision phase from ~50 Ma. This study suggests that heat needed for ductile 33 shortening during convergence, is primarily inherited from extension rather than being only 34 related to tectonic and/or sedimentary burial. This should have strong implications on tectonic 35 reconstructions in many collision belts that resulted from inversion of hyper-extended rift 36 basins

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“…Pollack et al 1993;Förster et al 2007;Lucazeau et al 2010;Rolandone et al 2013). A total of three heat flow sites were available in the study region located over 100 km far from the selected profiles and therefore, thus we are not considering surface heat flow as a constraint in our modelling.…”

Section: Global Data Setsmentioning

confidence: 99%

Lithospheric mantle heterogeneities beneath the Zagros Mountains and the Iranian Plateau: a petrological-geophysical study

Tunini¹,

Jiménez‐Munt²,

Fernàndez³

et al. 2014

Geophysical Journal International

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S U M M A R YWe apply a combined geophysical-petrological methodology in order to study the thermal, compositional, density and seismological structure of the crust and upper mantle along two transects across the Arabia-Eurasia collision region. Results on the crustal thickness show minimum values beneath the Arabia Platform and Central Iran (42-43 km), and maximum values beneath the Sanandaj Sirjan zone (SSZ; 55-63 km), in agreement with seismic data. Major discrepancies in Moho depth from those derived from seismic data are locally found in the SSZ (central Zagros) and Alborz Mountains where more moderate crustal thicknesses are modelled. Results on the lithosphere thickness indicate that the Arabian lithosphere is ∼220 km thick along both profiles, whereas Eurasian lithosphere is up to ∼90 km thinner, especially below the Central Iran and Alborz Mountains. The lithosphere-asthenosphere boundary (LAB) shows different geometries between the two transects. In the northern profile (northern Zagros), the LAB rises sharply below the SSZ in a narrow region of ∼90 km, whereas in the southern profile (central Zagros), rising occurs in wider region, from the Zagros fold-and-thrust belt (ZFTB) to the SSZ. The best fit of seismic velocities (Vp, Vs) and densities requires lateral changes in the lithospheric mantle composition. Our results are compatible with Proterozoic peridotitic mantle compositions beneath the Arabian Platform, Mesopotamian Foreland Basin and the accreted terrains of Eurasia Plate, and with a more depleted Phanerozoic harzburgitictype mantle composition below the ZFTB and imbricated zone.

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New heat flow measurements in Oman and the thermal state of the Arabian Shield and Platform

Cited by 37 publications

References 75 publications

Tectono-thermal evolution of Oman's Mesozoic passive continental margin under the obducting Semail Ophiolite: a case study Jebel Akhdar, Oman

Tectono-thermal evolution of Oman's Mesozoic passive continental margin under the obducting Semail Ophiolite: a case study Jebel Akhdar, Oman

Thermal imprint of rift-related processes in orogens as recorded in the Pyrenees

Lithospheric mantle heterogeneities beneath the Zagros Mountains and the Iranian Plateau: a petrological-geophysical study

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