Results 91 to 100 of about 25,161 (234)

Contributions on evaporite diagenesis

open access: yes, 1980
This is a preleminary report about the diagenesis of the Messinian evaporites in Tuscany. Our final purpose is to formulate a general scheme of the diagenetic evolution of Ca-sulfate evaporites through different stages.
Ciarapica, G., Passeri, Leonsevero
core   +1 more source

Biogenic silica diagenesis under early burial in hemipelagic marine sediments [PDF]

open access: yes, 2018
Four aspects of biogenic silica diagenesis are researched under this project: signatures of ongoing silica diagenesis in pore water, drivers leading to anomalous compaction (abrupt petrophysical changes), bottom-water temperature controls on silica ...
Shahab Varkouhi, Varkouhi, Shahab
core   +1 more source

Bone Density Assessment Through Sodium Poly-Tungstate Gradient Centrifugation: A Preliminary Study on Decades-Old Human Samples

open access: yesSeparations
Bone density is considered one of the many factors influencing bone structure and DNA preservation. For this reason, it is of interest in fields such as anthropology, palaeontology, and genetics.
Barbara Di Stefano   +8 more
doaj   +1 more source

Burial diagenesis, organic maturation and tectonic loading in the French subalpine chains, S.E. France [PDF]

open access: yes, 1992
The French Subalpine Chains of southeastern France lie on the western edge of the Western Alps. The area is the foreland fold/thrust belt to the main orogenic hinterland to the east.
Moss, Stephen James
core  

Influence of differential diagenesis of Chang 8 tight sandstone reservoirs in Qingcheng area on oil bearing properties

open access: yesYouqi dizhi yu caishoulu
To explore the influence of differential diagenesis on the oil bearing properties of tight sandstone reservoirs, Chang 8 reservoirs with ultra-low porosity and ultra-low permeability in the Qingcheng area were used as an example. Based on the statistical
ZHONG Hongli   +5 more
doaj   +1 more source

Effect of Laboratory Reagents for Cleaning Modern Contamination on the δ15N Integrity of Nitrogen‐Poor Samples

open access: yesRapid Communications in Mass Spectrometry, Volume 40, Issue 19, 15 October 2026.
ABSTRACT Rationale Nitrogen isotope values have been widely used for tracing ancient biogeochemical processes, but contaminant‐sensitive materials, such as Precambrian sedimentary rocks, meteorites, or returned extraterrestrial samples, often have low nitrogen levels and are thus vulnerable to modern organic contamination.
Kunmanee Bubphamanee   +2 more
wiley   +1 more source

Reservoir characterization and potential of the old red sandstone around the inner moray firth, NE Scotland [PDF]

open access: yes, 1993
Old Red Sandstone deposition in North East Scotland occurred during Devonian times within the Orcadian Basin, a northeast-southwest elongated structure. The basin formed in an extensional tectonic regime that resulted from gravitational collapse of over ...
Forbes, Douglas
core  

Diagenesis 3. Aspects of the Diagenesis of Coarse-Grained Siliciclastic Rocks

open access: yes, 1983
The process of diagenesis, by which sediments become rock, has many physical and chemical aspects. Even a cursory examination of the scientific literature shows that mineral reactions, original depositional environment, diagenetic environment, the flow ...
Hutcheon, Ian
core   +1 more source

Histology and fossil diagenesis of a pterosaur tooth from the Crato Formation (Lower Cretaceous of Brazil)

open access: yesThe Anatomical Record, Volume 309, Issue 10, Page 2739-2751, October 2026.
Abstract Pterosaur dental biology remains poorly understood despite its importance for comprehending feeding strategies and flight adaptations. Here, we present the first comprehensive histological analysis of an ornithocheiriform pterosaur tooth from the Lower Cretaceous Crato Formation (Santana Group, Northeast Brazil).
Tito Aureliano   +3 more
wiley   +1 more source

Sedimentology and reservoir characterisation of Lower Jurassic clastic sedimentary rocks, Salt and Trans Indus Ranges, Pakistan: Evidence from petrography, scanning electron microscopy and petrophysics

open access: yesThe Depositional Record
In this study, sandstones of the Lower Jurassic Datta Formation in the Salt and Trans‐Indus ranges are investigated regarding composition, diagenesis, provenance and reservoir properties using petrography, scanning electron microscopy and petrophysical ...
Salman Ahmed Khattak   +7 more
doaj   +1 more source

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