4 documents found, page 1 of 1
Mercury as a proxy for volcanic activity during extreme environmental turnover:...
Sial, A.N.; Lacerda, Luiz Drude de; Ferreira, V.P.; Frei, R.; Marquillas, R.A.; Barbosa, J.A.; Gaucher, C.; Windmöller, C.C.; Pereira, N.SThe usually low geological background concentrations of Hg makes this trace element suitable for identify- ing accumulation pulses in sediments that can be tentatively related to weathering processes and thus to climatic changes. Intense volcanism has witnessed the Cretaceous–Paleogene transition (KTB) and was, perhaps, responsible for dramatic climatic changes and decrease in biodiversity and mass extinction. ...
Mercury enrichment and Hg isotopes in CretaceousePaleogene boundary successions...
Sial, A.N; Chen b, Jiubin; Lacerda, Luiz Drude de; Frei, R.; Tewari, V.C.; Pandit, M.K.; Gaucher, C.; Ferreira, V.P.; Cirilli, S.; Peralta i, S.We investigate the use of Hg as a proxy for volcanism by studying four distal and two proximal sections in relation to the Deccan volcanic center, straddling the CretaceousePaleogene (KPg) boundary at (a) Højerup (Denmark), Bottaccione and Padriciano (Italy), (b) Meghalaya and Jhilmili (India), and (c) Bajada del Jagüel (Argentina). Hg sequestration by organic matter results in constant Hg/TOC ratio and linear ...
Sedimentary evolution and tectonic setting of the Itapucumi Group, Ediacaran, n...
Warren, L. V. [UNESP]; Freitas, B. T.; Riccomini, C.; Boggiani, P. C.; Quaglio, F.; Simoes, M. G. [UNESP]; Fairchild, T. R.; Giorgioni, M.; Gaucher, C.Made available in DSpace on 2019-10-04T12:35:30Z (GMT). No. of bitstreams: 0 Previous issue date: 2019-03-01; Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq); PROPE - UNESP; The Itapucumi Group is recognized worldwide due to its well-preserved Ediacaran fossil assemblage. Despite its paleontological importance, this unit remains...
Neoproterozoic geodynamic evolution of SW-Gondwana: a southern African perspective
Gaucher, C.