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Entree

Quantifying the constraints on the environment of early earth: the Cradle for emerging life on a Young planet

Processo: 11/12682-3
Linha de fomento:Bolsas no Brasil - Pós-Doutorado
Vigência (Início): 01 de novembro de 2011
Vigência (Término): 31 de outubro de 2014
Área do conhecimento:Ciências Exatas e da Terra - Geociências - Geologia
Pesquisador responsável:Carlos Roberto de Souza Filho
Beneficiário:Alexey Novoselov
Instituição-sede: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brasil
Assunto(s):Zircão   Geoquímica

Resumo

The environmental conditions during the Hadean, the period of Earth's history before 4 billion years ago, are highly uncertain largely because of the lack of any rock record for this period. During this time interval the planet probably developed from a magma ocean, with extreme surface temperatures, to a state in which life could emerge. The only record of this critical transition, which may provide insights into the requirements for life to develop on other planets, is in small crystals of the mineral zircon that come from this time interval. The geochemistry of these crystals has been used extensively to make a wide range of claims about the surface environment at this time. The goal of the proposed research is to develop a quantitative model of the Hadean atmosphere-hydrosphere-lithosphere system that predicts the compositional range of zircons that would form under different model conditions. A rigorous assessment of how well the Hadean zircon compositions constrain Earth's early environment will allow insight into a number of related questions of broad public interest. These include: (i) understanding the linkages between different aspects of the earth system, it is critical if we are to act as responsible stewards of the planet's environment, (ii) understanding complex interlinked systems can often be aided by studying at how they operate at their extremes - the Hadean environment is the "hot-house" extreme of Earth's climate, and (iii) there is a huge general interest within the public at large in understanding how our planet developed from a molten ball of rock to a habitable planet. This will also provide insight into how other planets in the "Goldilocks zone" evolve and hence impact the ongoing search for life elsewhere in the Universe. (AU)

Matéria(s) publicada(s) na Revista Pesquisa FAPESP sobre a bolsa::
Refugios apacibles en un mundo de volcanes 
Refugios apacibles en un mundo de volcanes 
Refúgios aprazíveis em um mundo de vulcões 
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Publicações científicas (5)
(Referências obtidas automaticamente do Web of Science e do SciELO, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores)
NOVOSELOV, ALEXEY A.; SILVA, DAILTO; SCHNEIDER, JERUSA; ABREVAYA, XIMENA CELESTE; CHAFFIN, MICHAEL S.; SERRANO, PALOMA; NAVARRO, MARGARETH SUGANO; CONTI, MARIA JOSIANE; DE SOUZA FILHO, CARLOS ROBERTO. Geochemical constraints on the Hadean environment from mineral fingerprints of prokaryotes. SCIENTIFIC REPORTS, v. 7, JUN 21 2017. Citações Web of Science: 4.
NOVOSELOV, ALEXEY A.; DE SOUZA FILHO, CARLOS ROBERTO. Potassium metasomatism of Precambrian paleosols. Precambrian Research, v. 262, p. 67-83, JUN 2015. Citações Web of Science: 10.
NOVOSELOV, ALEXEY A.; POPOV, SERGUEI; DE SOUZA FILHO, CARLOS ROBERTO. Evaluation of uncertainties in solid-aqueous-gas chemical equilibrium calculations. Computers & Geosciences, v. 79, p. 118-128, JUN 2015. Citações Web of Science: 1.
ALFIMOVA, NADEZHDA A.; NOVOSELOV, ALEXEY A.; MATRENICHEV, VJACHESLAVA.; DE SOUZA FILHO, CARLOS ROBERTO. Conditions of subaerial weathering of basalts in the Neoarchean and Paleoproterozoic. Precambrian Research, v. 241, p. 1-16, FEB 2014. Citações Web of Science: 7.
NOVOSELOV, ALEXEY A.; SOUZA FILHO, CARLOS ROBERTO. CRONO-A code for the simulation of chemical weathering. Computers & Geosciences, v. 60, p. 168-175, OCT 2013. Citações Web of Science: 3.

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