Branched GDGTs as Proxies in Surface Sediments From the South-Eastern Brazilian Continental Margin

Autor: Milena Ceccopieri, Renato S. Carreira, Angela L. R. Wagener, Jens Hefter, Gesine Mollenhauer

Publikováno v: Frontiers in Earth Science, Vol 7 (2019)

Branched glycerol dialkyl glycerol tetraethers (brGDGTs) are membrane lipids produced by bacteria usually ascribed to soil and peat deposits. The presence of brGDGTs in marine sediments can thus be used to track terrigenous organic matter inputs to t

Externí odkaz: https://doaj.org/article/37c77160b45942b980a96ad150d5f7aa

On the application of alkenone- and GDGT-based temperature proxies in the south-eastern Brazilian continental margin

Autor: Milena Ceccopieri, Jens Hefter, Angela de Luca Rebello Wagener, Renato S. Carreira, Gesine Mollenhauer

Publikováno v: Organic Geochemistry. 126:43-56

The applicability of two organic geochemical proxies ( U 37 K ' based on alkenones and T E X 86 H based on glycerol dialkyl glycerol tetraethers) for ocean temperatures was investigated on a regional scale in the SE Brazilian continental margin (Camp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f8844ac3b5d032a74e21c9c86bffe4d0
https://doi.org/10.1016/j.orggeochem.2018.10.009

Organic Carbon Aging as Recorded in Marine Sediments from the Cabo Frio Upwelling System (South-Eastern Brazil)

Autor: Douglas Villela de Oliveira Lessa, Gesine Mollenhauer, Renato S. Carreira, Ana Luiza Spadano Albuquerque, Milena Ceccopieri

Publikováno v: 30th International Meeting on Organic Geochemistry (IMOG 2021).

Summary The ¹⁴C-age offset between the organic matter (OM) and carbonates buried in marine sediments of the Cabo Frio upwelling system during the past 6.5 kyr was investigated. The ¹⁴C-ages of the OM were 787 ± 166 years older than those of fo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9b5455259082d7ca68f286310aea5ab9
https://doi.org/10.3997/2214-4609.202134240

Compound-Specific δ13C of n-Alkanes: Clean-Up Methods Appraisal and Application to Recent Sediments of a Highly Contaminated Bay

Autor: Angela de Luca Rebello Wagener, Milena Ceccopieri, Arthur de L. Scofield, Lilian Almeida

Publikováno v: Journal of the Brazilian Chemical Society, Volume: 29, Issue: 11, Pages: 2363-2377, Published: NOV 2018
Journal of the Brazilian Chemical Society v.29 n.11 2018
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ

Different clean-up methods to determine isotopic composition of n-alkanes were tested. Sources of organic matter in Guanabara Bay were re-examined through the δ13C of individual n-alkanes in surface sediment samples. The n-alkanes were efficiently i

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eb222a9fbf41f1d9503157e0db214010
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532018001102363&lng=en&tlng=en