Carbonate diagenesis of the upper Jurassic successions in the west of Binalud — Eastern Alborz (NE Iran)

Aghaei, Ali; Mahboubi, Asadollah; Moussavi‐Harami, Reza; Nadjafi, Mehdi; Chakrapani, G. J.

doi:10.1007/s12594-014-0044-z

Cited by 6 publications

(2 citation statements)

References 68 publications

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“…Isopachous cement presents rims growing with equal thickness around allochems (bioclasts or grains) as microcrystalline crystals (Figure 5g-h). This cement is common in marine/vadose environments [Aghaei et al, 2014;Flügel, 2010;Heckel, Ph. H., 1983].…”

Section: Diagenetic Processesmentioning

confidence: 99%

New Constraints of Interior Fars Sedimentary Basin Analysis During Asmari Formation (Oligocene-Lower Miocene) Deposition, South Iran

Yarem Taghloo Sohrabi,

Soleimani,

Ahmadi

et al. 2024

Russian Journal of Earth Sciences

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Interior Fars region is an important geological province of Zagros basin due to historical events. The present paper focused on the time span of the Asmari deposition (Oligo-Lower Miocene) in Fars area bounded by Kazerun and Nezamabad faults. The studied samples of Asmari Formation were collected from 3 different stratigraphic sections A, B and C. The area is discussed in view of microfacies variation, sequence stratigraphy and environmental factors such as diagenetic processes and sea level changes. Microscopic studies led to identification 13 carbonate facies in this area. The results showed that the Asmari Formation has been deposited in a carbonate shelf in 5 sedimentary sub-environments including open sea, bar, lagoon, shoal and tidal flat. Basin changes were also compared with global sea level changes. Sequential stratigraphic evidence showed that the Asmari Formation consists of two sedimentary sequences of third order. The unconformity in the lower boundary of Asmari Formation with Jahrom Formation in sections-B and C can be ascribed to the result of Pyrenean orogenic phase activity in this area. The Asmari Formation in this area has been undergone extensively by diagenetic processes. Micriticization, dolomitization, cementation, hematitization, stylolitization, neomorphism and dissolution are among the important and noteworthy of diagenetic processes. The intensity of each process is a function of facies characteristics (fabric control). Microfacies data and sea level changes curve in local (the area), regional and global scales revealed that these facies are more correlated to the local sea level variation than others. The present study resulted to new main points related to the Fars basin evolution. Reactivation of faults (such as Kazerun and Nezamabad), regional sea level changes and Alpine orogenic phases impact (i.e., Pyrenean phase) have involved a major role in sedimentary facies distribution and basin evolution.

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Section: Diagenetic Processesmentioning

confidence: 99%

New Constraints of Interior Fars Sedimentary Basin Analysis During Asmari Formation (Oligocene-Lower Miocene) Deposition, South Iran

Yarem Taghloo Sohrabi,

Soleimani,

Ahmadi

et al. 2024

Russian Journal of Earth Sciences

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“…The origin of both the chert nodules and the bedded cherts in the Fanerozoic sediments has attracted the attention of many authors. Generally, these rocks are interpreted as the products of synsedimentary, or early- to late-diagenetic, or epigenetic processes (see, e.g., refs − ). One of the regions of the occurrence of cherts is the Kraków-Częstochowa Upland (KCU).…”

Section: Introductionmentioning

confidence: 99%

Identification of Proton Populations in Cherts as Natural Analogues of Pure Silica Materials by Means of Low Field NMR

et al. 2020

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Recent theories about the sources of silica in bedded and nodular cherts do not fit the origin of cherts from the Kraków–Częstochowa Upland. Since siliceous sponges as a single source of silica is questionable, assumptions about additional sources have to be verified. In order to do so, three samples of nodular cherts and one representative sample of bedded chert were studied by means of 1 H LF-NMR 1D and 2D relaxometry and complementary geochemical methods. The results were compared with the literature and standard silica materials which helped to identify five types of 1 H signal. The very distinct 1D- T 2 spectra of the dried samples indicated the existence of closed pores which, after comprehensive analysis, were identified as inclusions filled with different types of siliceous materials. Saturation revealed the differences between nodular and bedded cherts that were visible mainly in the amount and size of open porosity. The principal component analysis of NMR parameters showed the excellent separation of these two groups of samples and this is well visible on the biplots. Additionally, the estimated pore size distribution revealed that the total porosity of around 2% consisted primarily of mesopores (2–50 nm in diameter) and macropores (diameter >50 nm). In bedded cherts, open porosity is dominated by macropores, while the share of mesopores and macropores is similar in nodular cherts.

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A conceptual model for water resources circulation patterns in Andarokh-Kardeh region (NE, Iran)

Mohammadzadeh

Heydarizad

2020

Geochemistry

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Carbonate diagenesis of the upper Jurassic successions in the west of Binalud — Eastern Alborz (NE Iran)

Cited by 6 publications

References 68 publications

New Constraints of Interior Fars Sedimentary Basin Analysis During Asmari Formation (Oligocene-Lower Miocene) Deposition, South Iran

New Constraints of Interior Fars Sedimentary Basin Analysis During Asmari Formation (Oligocene-Lower Miocene) Deposition, South Iran

Identification of Proton Populations in Cherts as Natural Analogues of Pure Silica Materials by Means of Low Field NMR

A conceptual model for water resources circulation patterns in Andarokh-Kardeh region (NE, Iran)

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