This study successfully isolates a fraction of intra-crystalline proteins from shells of the marine gastropod Patella vulgata and assesses the suitability of these proteins for IcPD (Intra-crystalline Protein Diagenesis) geochronology. We discuss the mineralogical composition of this gastropod, investigated for the first time by X-ray diffraction mapping, and use the results to inform our sampl...

[1] The transformation of hydrated clay minerals (smectite) to anhydrous forms (illite) occurs in the diagenesis of shales in sedimentary basins. The released pore water can lead to excess pore pressures and is of concern in oil drilling operations. Most simply, the process can be modeled as a first-order thermally activated reaction, but an alternative interpretation is that diagenesis occurs ...

The CheMin instrument on the Mars Science Laboratory rover Curiosity detected ubiquitous high abundances (∼15–70 wt%) of X-ray amorphous components (AmCs) in ancient sedimentary rocks Gale crater. Mechanisms and timing formation for AmCs are poorly constrained, could include volcanic, impact, or aqueous processes. We explore trends AmC composition abundance, look systematic compositional variat...

At the Sidi Bouzid area located in Central Tunisia, Cenomanian-Turonian reservoir rocks are well outcropping, especially in the Jebel el Kébar and Meloussi areas. The present work confirms that these carbonate intervals constitute the lateral equivalent of the Early-Middle Turonian Biréno and Late Turonian-Coniacian Douleb reservoir Members which are included within the pelagic marls of the Tur...

Research has been conducted into the diagenesis of the Luxembourg Sandstone. Literature studies were followed by a visit to the outcrop, after which thin sections were studied. The Luxembourg Sandstone Formation has been deposited in the Hettangian and Sinemurian, both lower Jurassic ages. A sea strait connecting the Northern German Basin and the Paris Basin was located in present day Luxembour...

The perforated Pediastrum Meyen s.l. species are recorded for the first time in basal levels of Tithonian Vaca Muerta Formation, extending its stratigraphical record to ages as old Late Jurassic times. Based on ecological requirements simplex var. clathratum and P. biwaense, previously warm paleoclimatic conditions suggested by Neuquén Basin, reinforced. co-occurrence different mechanisms that ...

ABSTRACT Previously published anomalous whole-rock stable isotopic values from the Poison Strip Sandstone Member of Cretaceous Cedar Mountain Formation (CMF) eastern Utah are uncertain origins. This study investigated diagenetic history and processes responsible for these data. Accordingly, we integrated photomicroscopic techniques including polarized light microscopy, epifluorescence cathodolu...

Calcium isotopes of carbonate rocks can trace calcium cycles and record changes in the marine environment. As published isotope profiles at Permian-Triassic boundary are rare, comparative studies on deep-water were lacking for major extinction event that occurred during this time. We present sections different water depths Chibi area southern China we have selected a study. analyzed carbon isot...