Facies Analysis, Depositional Environment of the Lower Permian Deposits of Chili Formation in Kalmard Block, Eastern Central Iran (Darin Section)

Shahraki, Javad; Javdan, Mohammad Javad; Hashemi, Seyed Mahmood Pahlavan; Jami, Mohsen; Nastooh, Mahdiyeh; Kalvandi, Seyed Mohammad

doi:10.4236/ojg.2015.58049

Cited by 3 publications

(3 citation statements)

References 28 publications

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“…Regarding the grain size and the relationship between horizontal lamination and high-energy flows in fine-grain sandstones, one can attribute the formation of this facies to the high speed of water flow. Parting lineations are formed at the surface of very fine to fine grain sandstone beds [4]- [10]. Sandstone facies (sp), formed at low speed of water flow and due to the movement of ripples and two-dimensional megaripples [5] [6] [10].…”

Section: Discussionmentioning

confidence: 99%

“…Microscopic facies are divided into two groups of orthochem including ground and cement, and allochem including skeletal and non-skeletal elements. The frequency percentage of orthochem is computed by polarizan microscope and depicted separately for each allochem [10] [11] (Figure 6). The fluctuation curve of sea level is also depicted based on vertical changes in the characteristics of microscopic facies [10] [11] (Figure 7).…”

Section: Frequency Column Of Microscopic Faciesmentioning

confidence: 99%

“…semi-restricted environments[8] [10] [14]-[17]. Bioclastic peloid packstones suggest higher energy conditions in a shallow subtidal setting[18] [19].…”

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confidence: 99%

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Facies Analysis, Sedimentary Environment and Sequence Stratigraphy of the Carboniferous Deposits of Gachal Formation, Eastern Central Iran (Rahdar Section)

Javdan¹,

Gorgij²,

Shahraki³

et al. 2015

OJG

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Early carboniferous deposits of the Kalmard block, with various characteristics in different outcrops, are recognized by Gachal Formation. Generally speaking, this formation comprises of four different members (A, B, C and D), consisting of carbonate and evaporative rocks. Gachal Formation is composed chiefly of 55 meters sandstone and limestone interbedded with shale. According to the lithological and microscopic studies, Gachal Formation is deposited in beach, semi-restricted and open lagoon, shoal and open marine environments. Vertical changes of microfacies and the curve of its depth changes account for the high thickness of the facies of shoal and bar sub-environments and the low thickness of the facies of lagoon and open marine sub-environment as well. Gachal Formation rocks in Rahdar section are deposited in a low-angle homoclinal ramp located in southern Paleothysis Ocean. The carbonate-sandstone sequence in Gachal Formation in Rahdar section is composed of a depositional sequence separated from each other by type 1 sequence boundaries. Deposits of this formation are separated from lower deposits by type 2 sequence boundary and from Khan Group by unconformity. The sedimentary sequence identified in this formation points to the age of late Visean, conforming to Kaskaskia IV. The erosional boundary between Gachal and Khan Formations is relatively compatible with drop in sea level at Late Kaskaskia global scale.

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Section: Discussionmentioning

confidence: 99%

Section: Frequency Column Of Microscopic Faciesmentioning

confidence: 99%