Caroline Sanchez (Post-doc)

Relation between geomorphology and paleoclimate change of the Guiana shield

My postdoc project is about understanding the relationship between the weathering periods and the geomorphological evolution of the Guiana Shield through the Cenozoic. For this purpose, I will perform hematite and goethite (U-Th-Sm)/He dating on lateritic duricrusts which are remaining on paleo-surfaces at different altitudes. The geographic repartition of those ages will be compared to the identified paleo markers obtained after GIS treatment in order to understand which chronological relationship exists between geomorphology and major weathering periods. In addition, I will also apply the (U-Th)/He-Ne on iron oxides to better constrain the possible range of dating on iron oxide minerals.

Short CV

  • Since 02/2019: Post-doc position, Université Paris-Sud. STS Brgm/Total project
  • 12/2017-02/2018: Research assistant position in the Geosciences Environnement Toulouse laboratoire.
  • 06/2017–09/2012: PhD in Geosciences. In co-supervision: Universidad Católica del Norte, Antofagasta, Chile and Université Toulouse III, France “Denudation evolution and geomorphic context of supergene copper mineralization in Centinela District, Atacama Desert, Chile, from thermochronology and cosmogenic nuclides. Copedim project
  • 2012: MSc degree: Earth and planets. Université de Toulouse, France. Sediment provenance of the south Amazonian foreland basin (Madre de Dios, Peru): geochemical (main and trace elements, and Nd-Sr isotopy) and mineralogic isotopy (DRX and heavy minerals).
  • 2011: MSc degree 1st year: Géosciences. Exchange between the Universidad de Chile, Santiago, Chile and Université des Sciences et technologies Lille 1, Lille, France
  • 2010: BSc degree : Géosciences et Environnement. Université des Sciences et Technologies de Lille 1 (USTL), France

Publications

Lopez, C.; Riquelme, R.; Martínez, F.; Sanchez, C.; Mestre, A. (2018). Zircon U-Pb geochronology of the Mesozoic to Lower Cenozoic rocks of the Coastal Cordillera in the Antofagasta region (22°30’-23°00’ S): insights of the Andean tectono-magmatic evolution, Journal of South American Earth Sciences. DOI:10.1016/j.jsames.2017.11.005

Sanchez, C.; Brichau, S.; Riquelme, R.; Carretier, S.; Lopez, C.; Mpodozis, C.; Campos, E., Thomas, B. Bissig; Regard, V.; Hérail, G.; Marquardt, C. (2018). Exhumation history and timing of supergene copper mineralisation in an arid climate: New thermochronological data from the Centinela District, Atacama, Chile. Terra Nova, 30(1), 78-85. DOI: 10.1111/ter.12311

Louterbach, M.; Roddaz, M.; Antoine, P-O.; Marivaux, L., Adnet, S.; Bailleul, J.; Santos, R.V.; Chemale, F.; Baby, P.; Sanchez, C.; Calderon, Y. (2018). Provenance record of late Maastrichtian–late Palaeocene Andean Mountain building in the Amazonian retroarc foreland basin (Madre de Dios basin, Peru). Terra Nova, 30(1), 17-23. DOI: 10.1111/ter.12303

Riquelme, R.; Tapia, M.; Campos, E.; Mpodozis, C.; Carretier, S.; González, R.; Muñoz, S.; Fernandez-Mort, A.; Sanchez, C.; Marquardt, C. (2017). Supergene and exotic Cu-mineralization occur during periods of landscape stability in the Centinela Mining District, Atacama Desert. Basin Research, 1–31. DOI:10.1111/bre.12258

Louterbach, M.; Roddaz, M.; Bailleul, J.; Antoine, P.-O.; Adnet, S., Kim J. H., van Soelen E.; Parra, F.; Sanchez, C., Gérard, J.; Calderon, Y.; Gagnaison, C.; Sinninghe, J.S.; Damsté, P. Baby. (2015). Evidences for a Paleocene marine incursion in Southern Amazonia; Madre de Dios Sub-Andean Zone, Peru. Palaeogeography. Palaeoclimatology. Palaeoecology 414C 451–471 DOI:10.1016/j.palaeo.2014.09.027 and DOI: 10.1016/j.palaeo.2014.11.023

Conference abstracts:

Sanchez, C. Regard, V.; Carretier, S., Riquelme, R.; Blard, P-H; Campos, E.; Brichau, S,Lupker, M.; Hérail, G. (2018) Neogene basin infilling from cosmogenic nuclides (10Be and 21Ne) in Atacama, Chile: implications for paleoclimate and copper supergene enrichment, ISAG. Poster

Sanchez, C.; Brichau, S.; Regard, V., Carretier, S.; Riquelme, R.; Blard, P-H.; Bissig T.; Campos, E.; Lopez C.; Mpodozis C.; Hérail G. (2018) Combining thermochronology and cosmogenic nuclides to constrain landscape evolution in the Atacama Desert: implications for supergene copper mineralization. 16th International Conference on Thermochronology 2018, Quedlinburg, Germany. Oral presentation

Antonio, P.Y.J., D’Agrella-Filho, M.S., Nédélec, A., Trindade, R.I.F., Dantas, E.L., Poujol, M., Sanchez, C., Martínez Dopico, C.I., de Oliveira, D.C., da Silva, F.F. (2018) The 1.88 Ga Uatumã event: paleogeography and possible true polar wander during the Paleoproterozoic, Brazilian Congress of Geology 2018. Oral Presentation

Sanchez, C.; Brichau, S.; Regard, V., Carretier, S.; Riquelme, R.; Campos, E.; Tapia, M.; Blard, P-H. (2017) Constrains on supergene and exotic copper mineralization in the Centinela district, Atacama Desert. New insights from a multi-disciplinary approach, 14th SGA. Poster

Sanchez, C ; Regard, V., Carretier, S. ; Riquelme, R ; Pierre-Henri Blard, Eduardo Campos, E. ; Brichau, S, Lupker, M. ; Hérail, G (2017). Neogene basin infilling from cosmogenic nuclides (10Be and 21Ne) in Atacama, Chile. EGU. Poster

Sanchez, C.; Brichau, S.; Riquelme, R.; Carretier, S ; López, C.; Campos, E.; Regard, V.; Hérail, G. Marquardt, C.; Mpodozis, C.(2016) Post-incaic phase supergene copper enrichment and pediplanation, Northern Chile, Centinela District. 15th International Conference on Thermochronology 2016, Maresias, Brazil. Poster

Sanchez, C.; Brichau, S.; Riquelme, R.; López, C.; Campos, E.; Farías, M.; Mpodozis, C.; Regard, V.; Hérail, G. (2015) Low temperature thermochronology, porphyry-Cu exhumation history and supergene enrichment in the Centinela District, Atacama Desert, Chile Congreso geologico Chileno 2015. Oral presentation

Sanchez, C.; Brichau, S.; Carretier, S.; Riquelme, R.; Regard, V.; Monié (2014) Low temperature thermochronology and copper supergene-exotic deposit: a clue to understand the pediment-mineralization system. 14th International Conference on Thermochronology 2014, Chamonix, France. Poster