This Middle Jurassic - Early Cretaceous sedimentary cycle
results from the Tethys opening in Sardinia (Costamagna et al., 2007).
Using the results of the geochemical research of REE together with the change of isotopic composition of carbon in the sedimentary cycle
emphasizes the dynamics of the change of two different geochemical parameters during the catagenetic processes of OM and allow us to talk about the migration capabilities of microelements (REE) and their accumulation together with hydrocarbons of oil and gas depending on the stage of organic matter transformation.
C2: C2 illustrates the termination of the primary sedimentary cycle
. It contains the following textures:
A favorable circumstance for studying the Geochemistry of REE in oils was the appearance of papers on geochemical behavior of REE in most natural processes, especially in the processes of sedimentary cycle
. These papers were mostly written in GEOCHE USSR AS  and also considered in a number of researches by Haskin L.A.
The recycled quartzose sedimentary source rocks formed probably after several sedimentary cycles
through which, less resistant rock forming minerals such as feldspars were degraded and leached leaving behind quartz and ultrastable heavy minerals.
The phases of such sedimentary cycles
are marked by representative sequence boundaries with typical onlapping surfaces and unconformities.
As a whole, there were several sedimentary cycles
in the Dongxiang ore deposit, and each of the cycles possibly involved marine volcanic rocks, volcanic tuff, metal sulphide, and siliceous rocks from the bottom to the top.
Use of sedimentary cycles
for detailed correlation of carbonate sections: an example of the Paaskula Member ([D.sub.II]P), Keila Formation, the Viruan of North Estonia.
Nestor & Einasto (1997) differentiated nine high-rank shallowing-up sedimentary cycles
in the development of the Baltic post-Tremadocian Ordovician and Silurian basin (Fig.
According to the redox and palaeoproductivity proxies, two sedimentary cycles
can be differentiated (Figs.
The most completely ordered dolomite is associated with the primarily bioclastic sediments in the upper part of regressive sedimentary cycles
, formed in a high-energy environment.
(1995): Nature, rank and origin of Phanerozoic sedimentary cycles
. Comptes Rendus.