Enayatallah Haghfarshi; Peyman Rezaee; Seyed Reza Moosavi Harami; Mohammad Faridi
Abstract
Lignite Beds of Tabriz are among of the Neogene formations in the northwestern area of the Iran, which is spread in the eastern suburb of Tabriz. Its sedimentary facies includes facies groups of fine grains clastics, sandstones, limestones and facies of lignite, tuff and microfacies and petrofacies under ...
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Lignite Beds of Tabriz are among of the Neogene formations in the northwestern area of the Iran, which is spread in the eastern suburb of Tabriz. Its sedimentary facies includes facies groups of fine grains clastics, sandstones, limestones and facies of lignite, tuff and microfacies and petrofacies under them. In this study, two stratigraphic sections of these sediments in the eastern part of Tabriz were studied and 171 samples and 42 thin sections were collected and studied. XRD analysis for mineralogy and SEM electron microscopy for 3-dimensional studies were used to identify microfossils. Identified fossils include the genera and species of gastropods, Pelecypods, ostracods, fish, diatoms, charophyte algae, and foraminifera. The studied fossil assemblages includes species from freshwater to euryhaline and marine. The identified sedimentary environments include the lake basin environment, the shallow coastal environment and the marshy lake environment. In the studied sedimentary strata, strong fossil evidence and sedimentological evidence of the marine environment are not observed, at least during its lifetime. Therefore, it is concluded that the marine taxis in these deposits remain and are adapted from a former marine environment.
Sedimentology
Parvaneh Faridi; Payman Rezaee; AliReza Piryaei; Mehdi Masoodi
Abstract
Halokinetic Sequences are used for analyzing and connecting endogenous and exogenous influencing factors on the sedimentary sequences around the diapir. The most important effect of the diapir movement is the creation of different sedimentary spaces in the result of uplift and subsidence. So, the Handun ...
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Halokinetic Sequences are used for analyzing and connecting endogenous and exogenous influencing factors on the sedimentary sequences around the diapir. The most important effect of the diapir movement is the creation of different sedimentary spaces in the result of uplift and subsidence. So, the Handun Salt Plug has been selected as a classic example. In the Handun salt plug outcrop Upper Cretaceous to recent sediments. The most important effect of the salt plug movement is during the Eocene of the Jahrum. The initial phase of salt extrusion was observed in the Gurpi Formation. Continuation of salt extrusion carrying on hook forms in the deep- water shale of the Pabdeh Formation in the Paleocene-middle Eocene. In the middle Eocene, when the Jahrum carbonate sedimentation exceeds the salt rise, wedges onlap the salt plug. In addition, thrusting led to the emergence of the salt tongues and forming hook in the Formation. The final phase of salt extrusion has been seen in the hooks in the siliciclastic of the Razak Formation. Finally, ongoing shortening is recorded by Guri member growth strata of the Handun salt plug. Our results provide new insights into using Halokinetic Sequences in tectono-sedimentary analysis of the Zagros diapirs.
