Paleoclimate and tectonic controls on the depositional and diagenetic history of the Cenomanian–early Turonian carbonate reservoirs, Dezful Embayment, SW Iran

Facies ◽  
2013 ◽  
Vol 60 (1) ◽  
pp. 147-167 ◽  
Author(s):  
Hamzeh Mehrabi ◽  
Hossain Rahimpour-Bonab
Keyword(s):  
Carbonate Reservoirs ◽  
Dezful Embayment ◽  
History Of ◽  
Sw Iran ◽  
Diagenetic History

PALAEO-EXPOSURE SURFACES IN CENOMANIAN - SANTONIAN CARBONATE RESERVOIRS IN THE DEZFUL EMBAYMENT, SW IRAN

2013 ◽  
Vol 36 (4) ◽  
pp. 335-362 ◽  
Author(s):  
H. Rahimpour-Bonab ◽  
H. Mehrabi ◽  
A. Navidtalab ◽  
M. Omidvar ◽  
A. H. Enayati-Bidgoli ◽  
...  
Keyword(s):  
Carbonate Reservoirs ◽  
Dezful Embayment ◽  
Sw Iran

DIAGENETIC HISTORY OF CAMBRIAN SANDSTONE UNITS IN WESTERN WISCONSIN

2016 ◽  
Author(s):  
Rachel Fliflet ◽  
◽  
Justin M. Poirier ◽  
Brian J. Mahoney ◽  
Kent M. Syverson
Keyword(s):  
History Of ◽  
Diagenetic History

DIAGENETIC HISTORY OF CAMBRIAN SANDSTONE UNITS IN WESTERN WISCONSIN: IMPLICATIONS FOR RESOURCE EXTRACTION

2016 ◽  
Author(s):  
Rachel Fliflet ◽  
◽  
Justin M. Poirier ◽  
J. Brian Mahoney ◽  
Kent M. Syverson
Keyword(s):  
Resource Extraction ◽  
History Of ◽  
Diagenetic History

BURIAL, TEMPERATURE AND MATURATION HISTORY OF CRETACEOUS SOURCE ROCKS IN THE NW PERSIAN GULF, OFFSHORE SW IRAN: 3D BASIN MODELLING

2019 ◽  
Vol 42 (2) ◽  
pp. 125-144
Author(s):  
A. Baniasad ◽  
V. Sachse ◽  
R. Littke ◽  
B. Soleimany
Keyword(s):  
Persian Gulf ◽  
Source Rocks ◽  
Basin Modelling ◽  
History Of ◽  
Sw Iran

scholarly journals Experimental degradation of helicoidal photonic nanostructures in scarab beetles (Coleoptera: Scarabaeidae): implications for the identification of circularly polarizing cuticle in the fossil record

2018 ◽  
Vol 15 (148) ◽  
pp. 20180560 ◽  
Author(s):  
Giliane P. Odin ◽  
Maria E. McNamara ◽  
Hans Arwin ◽  
Kenneth Järrendahl
Keyword(s):  
Uric Acid ◽  
Fossil Record ◽  
Evolutionary History ◽  
Polarized Light ◽  
Circularly Polarized Light ◽  
Circularly Polarized ◽  
Alkaline Conditions ◽  
History Of ◽  
Diagenetic History ◽  
Scarab Beetles

Scarab beetles (Coleoptera: Scarabaeidae) can exhibit striking colours produced by pigments and/or nanostructures. The latter include helicoidal (Bouligand) structures that can generate circularly polarized light. These have a cryptic evolutionary history in part because fossil examples are unknown. This suggests either a real biological signal, i.e. that Bouligand structures did not evolve until recently, or a taphonomic signal, i.e. that conditions during the fossilization process were not conducive to their preservation. We address this issue by experimentally degrading circularly polarizing cuticle of modern scarab beetles to test the relative roles of decay, maturation and taxonomy in controlling preservation. The results reveal that Bouligand structures have the potential to survive fossilization, but preservation is controlled by taxonomy and the diagenetic history of specimens. Further, cuticle of specific genus ( Chrysina ) is particularly decay-prone in alkaline conditions; this may relate to the presence of certain compounds, e.g. uric acid, in the cuticle of these taxa.

scholarly journals Ultrastructure, dissolution and "pyritization" of Late Quaternary and Recent echinoderms

1987 ◽  
Vol 36 ◽  
pp. 275-287
Author(s):  
Margit Jensen ◽  
Elsebeth Thomsen
Keyword(s):  
Late Pleistocene ◽  
Sea Water ◽  
Late Quaternary ◽  
Pore Space ◽  
Water Interface ◽  
Sea Stars ◽  
Northern Norway ◽  
History Of ◽  
Organic Tissue ◽  
Diagenetic History

The diagenetic history of the skeletal elements of Late Pleistocene-Holocene Ophiura sarsi from the shelf off northern Norway (Andfjorden, Malangsdjupet) is elucidated by comparison with natural and induced degradation of the skeletal elements of Recent ophiuroids (brittle stars) and asteroids (sea stars) from Danish waters. Dissolution features ("core-and-rind") in the trabeculae of fossil and Recent echinoderm stereom are initiated during death and early decay of organic tissue in the animals. The trabeculae have a polycrystal­line lamellar ultrastructure and lose their older central part during later stages of dissolution, which are dependant on undersaturation of the sea-water with regard to CaC03• The presence of undersaturated sea-water is supported by palaeoecological studies (Thomsen & Vorren 1984, 1986) implying oxygen deficient periods in the Late Pleistocene and an increased biogenic production in the Holocene. Pyrite framboids are situated in the secondary voids within the trabeculae and in the pore space of the stereom of the Late Pleistocene elements. No pyrite is observed within the polycrystalline lamellar ultrastructure of the trabeculae. The Late Pleistocene "pyritization" took place during oxygen deficient periods at the sediment-water interface or within the reduced zone of the topmost sediment.

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