THE VALANGINIAN WEISSERT OCEANIC ANOXIC EVENT RECORDED IN CENTRAL-EASTERN SARDINIA (ITALY)

Autor: CINZIA BOTTINI, IGINIO DIENI, ELISABETTA ERBA, FRANCESCO MASSARI, HELMUT WEISSERT

Publikováno v: Rivista Italiana di Paleontologia e Stratigrafia, Vol 124, Iss 3 (2018)

Investigations on the S’Ozzastru section from the northern part of the Mt Albo area (central-eastern Sardinia, Italy) for integrated litho- bio- and chemostratigraphy allowed the identification of the Valanginian Weissert Oceanic Anoxic Event (OAE)

Externí odkaz: https://doaj.org/article/06bb71ab3df14ca694b4b8a4454334d9

Mesozoic C-cycle perturbations and climate: evidence for increased resilience of the Cretaceous biosphere to greenhouse pulses

Autor: Helmut Weissert

Publikováno v: Canadian Journal of Earth Sciences. 56:1366-1374

The Mesozoic C-isotope record traces the history of the global carbon cycle. Major perturbations of the carbon cycle triggered by extraordinary volcanic activity are recorded in negative spikes coupled with positive C-isotope excursions. Prominent ex

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::be79b638d6f513c0c5f2102e4fe5ef77
https://doi.org/10.1139/cjes-2018-0227

High‐resolution C‐isotope, TOC and biostratigraphic records of OAE 1a (Aptian) from an expanded hemipelagic cored succession, western Tethys : a new stratigraphic reference for global correlation and paleoenvironmental reconstruction

Autor: Helmut Weissert, Richard D. Pancost, Luis M. Nieto, Matías Reolid, María Luisa Quijano, P. A. Ruiz-Ortiz, Peter W. Skelton, Rafael Martínez-Rodríguez, José Miguel Molina, Ian Jarvis, Carmina López-Rodríguez, José Manuel Castro, Ginés A. de Gea, Roque Aguado

Publikováno v: Paleoceanography and Paleoclimatology
Castro, J M, Ruiz-Ortiz, P A, de Gea, G A, Aguado, R, Jarvis, I, Weissert, H, Molina, J M, Nieto, L M, Pancost, R D, Quijano, M L, Reolid, M, Skelton, P W, López-Rodríguez, C & Martínez-Rodríguez, R 2021, ' High-Resolution C-isotope, TOC and Biostratigraphic Records of OAE1a (Aptian) from an Expanded Hemipelagic Cored Succession, Western Tethys : a New Stratigraphic Reference for Global Correlation and Paleoenvironmental Reconstruction ', Paleoceanography and Paleoclimatology, vol. 36, no. 3, e2020PA004004 . https://doi.org/10.1029/2020PA004004

A high-resolution carbonate C-isotope stratigraphy for the Aptian is presented for the Cau core (Spain). The biostratigraphically calibrated C-isotope stratigraphy of the core is used to refine the previously defined C-isotope segments of the Aptian.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b162fb3c17cec367a6e84908d875a44
https://eprints.kingston.ac.uk/id/eprint/48338/11/Jarvis-I-48338-VoR.pdf

Oxygen isotopes in ophicalcites: an ever-lasting controversy?

Autor: Helmut Weissert, Daniel Bernoulli

Publikováno v: International Journal of Earth Sciences, 110 (1)
International Journal of Earth Sciences

Tectono-sedimentary breccias, known as ophicalcites, overlie serpentinised peridotites at a Jurassic ocean-continent transition along the Penninic-Austroalpine transition in the Eastern Alps of Switzerland. Deformation of the exhumed mantle rocks and

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::568ee1c795468772eddec3d6b2cc3a43
https://hdl.handle.net/20.500.11850/448246

Methane in Earth History

Autor: Helmut Weissert

Naturally occurring methane has two sources, defined as biogenic methane and thermogenic methane. Biogenic methane is the product of microbial activity, the formation of thermogenic methane is controlled by temperature, pressure and also by the compo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8f141869da4ba0f3f62f19bcbab964c9
https://doi.org/10.1016/b978-0-12-409548-9.12391-7