Reconstruction of palaeoenvironmental conditions of the Vaca Muerta formation in the southern part of the Neuquén Basin (Tithonian-Valanginian): Evidences of initial short-lived development of anoxia

Conjugated enrichments in arsenic and antimony in marine deposits used as paleoenvironmental proxies: preliminary results

“…The same is true for the cold seepassociated samples examined by Wang et al (2019a). Lastly the same is also the case for samples of the VM1 section of the Vaca Muerta Fm., for which cold seepage influences have been suspected (Krim et al, 2019). The geological objects concerned by hydrothermalism discussed here are in fact all linked to cold seeps.…”

Integrated source rock evaluation along the maturation gradient. Application to the Vaca Muerta Formation, Neuquén Basin of Argentina

“…In addition, there are many local contributions from outcrop sections and the subsurface that include TOC and Rock‐Eval ® pyrolysis analyses (e.g. Askenazi et al., 2013; Boll et al., 2014; Capelli et al., 2021; Cavelan et al., 2019; Karg & Littke, 2020; Krim et al., 2019; Małachowska et al., 2019; Milliken et al., 2019; Petersen et al., 2020; Romero‐Sarmiento et al., 2017; Scasso et al., 2005; Sylwan, 2014). All those studies and the present work indicate high present‐day TOC values ranging from 1% to 12% with maximum values towards the base of the unit in the lower VM (Figure 4).…”

Dynamic environmental conditions recorded by the trace fossil Teichichnus and event beds during deposition of the basal Vaca Muerta Formation in the central Neuquén Basin (Argentina)

“…The carbonate system temporarily expanded southward in response to climate and sea-level changes (Zeller et al, 2015;Domínguez et al, 2020). The Vaca Muerta Formation formed under low-oxic to anoxic conditions as evidenced by rare to absent benthic body fossils, their small size where present, depauperate to absent bioturbation structures, sediment fabric and geochemical proxies (e.g., Doyle et al, 2005;Kietzmann et al, 2016;Krim et al, 2017Krim et al, , 2019. Later, during diagenesis, temperatures of at least 100 • are recorded by ʽbeefʼ calcite veins that contain fluid hydrocarbons (Rodrigues et al, 2009;Weger et al, 2019;Larmier et al, 2021).…”