The global heterogeneity in export productivity after the Cretaceous-Paleogene (K-Pg) mass extinction is well documented, with some sites showing no change on geologic timescales, demonstrating sustained decline, and a few somewhat surprising increase. However, observational data come from so widespread that key outstanding question geographic scale of changes productivity, whether similar envi...

Microdigitate stromatolites (MDS) are common in Neoarchean–Paleoproterozoic successions but declined and gradually disappeared in Mesoand Neoproterozoic carbonates. The abundance of well-preserved fibrous fabrics and the absence of identifiable microbial fossils in MDS have been taken as evidence of their abiotic origin in carbonate-supersaturated and anoxic Precambrian oceans. Micronand nanome...

Abstract Globally, lacustrine carbonate rocks are often found in rift lake basins. Because they do not form large-scale conventional or unconventional reservoirs, have received enough attention previous oil and gas exploration. Recent years, exploration examples China show that has close relationship with gas. Mudstone deposits always a good effect the area. However, genesis of is still controv...

The stratigraphy and mineralogy of Balambo Formation (Aptian - Cenomanian) in exposed surface section near Chomabrok village the Imbrication zone, northeastern Iraq is studied. 450 meters thick consists thin to medium bedded yellowish-brown, black dark gray limestones, marly with thin- bedded, grayish marl shale, bands cherts abundant nodules lenses. From field observations petrographic studies...

The requirements for the accurate characterization of shoal sediments have increased in view fact that strata are eroded due to uplift and it is difficult calculate real thickness granular shoal. To solve this problem, with shoal-to-strata ratio, type distribution range carbonate rock facies described, sedimentary subsequently presented. Taking P2m2a Eastern Sichuan as an example, following con...

The need to investigate mineral precipitation in heterogeneous sedimentary rock with complex pore network and composition arises problems like clogging by barite during sulfate-rich water injection geological reservoirs, the durability of long term storage nuclear waste or damage induced crystallisation. At LFCR (Laboratoire des Fluides Complexes et leurs Réservoirs, Anglet, France), we aim rep...

Mixed carbonate–siliciclastic deposits provide unique insights into hydrodynamic processes that control sedimentation in tidal systems. This study presents sedimentological and ichnological data from the upper Miocene to lower Pliocene Bouse Formation, which accumulated during regional transgression at margin of a strait near north end ancestral Gulf California. The basal carbonate member Forma...

Abstract The conditions in ancient evaporative environments conducive to authigenic carbonate (especially dolomite [CaMg(CO 3 ) 2 ]) formation are still insufficiently understood. Insights from microfacies analysis can help constrain the these environments. We provide a brief overview of association and carbon oxygen isotope compositions beds intercalated claystone-rich succession Norian Arnsta...

Abstract The seismic stratigraphy and sedimentary facies of the Cretaceous Paleogene successions in north-eastern offshore part Taranaki Basin, New Zealand have been investigated order to unravel their depositional evolution identify potential hydrocarbon plays. Interpretation regional lines covering entire shelf-slope deepwater regions as well integrating allows identification several seismic-...

High burial temperature and a lack of material for traditional thermal proxies significantly impede the understanding history carbonate stratigraphic sequences in deep time. Carbonate clumped isotope thermometry interpreted through models solid-state isotopic reordering situ U-Pb dating provides new methodology reconstructing histories such successions. Calcite fabrics (micrite cements veins) f...