FACIES, SEDIMENTARY ENVIRONMENTS AND SEQUENCE STRATIGRAPHY OF TRIASSIC DEPOSITES IN JULFA EASTERN AZARBAIJAN IRAN

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MAHARI R.; KOHANSAL GHADIMVAND N.; ANSARI HASANABAD Y.

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Journal: JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY) Year:2010 | Volume:20 | Issue:77 (GEOLOGY ISSUE) Page(s): 37-50

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Title

FACIES, SEDIMENTARY ENVIRONMENTS AND SEQUENCE STRATIGRAPHY OF TRIASSIC DEPOSITES IN JULFA EASTERN AZARBAIJAN IRAN

Author(s)

MAHARI R. | KOHANSAL GHADIMVAND N. | ANSARI HASANABAD Y. | Issue Writer Certificate

Keywords

TRIASSICQ3

JULFAQ3

FACIESQ3

SEDIMENTARY ENVIRONMENTQ3

SEQUENCE STRATIGRAPHYQ3

Abstract

Introduction: First time Stull established existence of TRIASSIC deposits in Alborz.Glaus named this rock package as Elika formation. Type section measured in Elika valley (north of Tehran). In this section Elika formation include 95 meters of thin bedded limestone to shally limestone and 200 meters of dolomite and dolomitic limestone. In Studied area (Jolfa) TRIASSIC deposits are equivalent with Elika formation. Study of these deposits started in 19th century by Abish.Aim: Present paper tries to represent FACIESes, SEDIMENTARY ENVIRONMENTs and sedimentary sequences of TRIASSIC deposits in Western Jolfa. FACIES division based on microscopic studies and field investigations and their nomination is based on Donhom classification. SEDIMENTARY ENVIRONMENTs described on vertical and horizontal shift of FACIES and finally sequences are divided by SEQUENCE STRATIGRAPHY principles.Materials and Methods: First step of this study was field works such as thickness, dip and streak measurement and sampling. Second step was production of thin sections from rock samples for microscopic studies. Stratigraphic column of studied section drew by field information. Based on microscopic studies microfacies groups and then SEDIMENTARY ENVIRONMENTs were specified. Finally upward shallowing cycles, system tracts and sedimentary sequences were distinguished. Determination of SEDIMENTARY ENVIRONMENTs and sequences was microfacies and field geology works.Results: Study of TRIASSIC deposits in Western Jolfa established five main group of FACIES belong to open marine, bar, lagoon, intertidal and supratidal environments and finally form three sedimentary sequences.Conclusion: 855 meters of trissic deposites are exposed in studied area. In this area Permian and TRIASSIC boundary is spotted as continues boundary. But sequence stratigraphic studies established a type 2 unconformity (SB2). Also these deposits covered with Miocene conglomerate with angular unconformity. Based on field and laboratory works TRIASSIC deposits in Western Jolfa divide in two parts (carbonate and clastic). Lower boundary of first sequence is SB2 and upper boundary of third sequence is SB1. Also first and second sequences show less correlation with global sea level curve but third sequence is comparable with global sea level curve.

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APA: Copy

MAHARI, R., KOHANSAL GHADIMVAND, N., & ANSARI HASANABAD, Y.. (2010). FACIES, SEDIMENTARY ENVIRONMENTS AND SEQUENCE STRATIGRAPHY OF TRIASSIC DEPOSITES IN JULFA EASTERN AZARBAIJAN IRAN. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), 20(77 (GEOLOGY ISSUE)), 37-50. SID. https://sid.ir/paper/70608/en

Vancouver: Copy

MAHARI R., KOHANSAL GHADIMVAND N., ANSARI HASANABAD Y.. FACIES, SEDIMENTARY ENVIRONMENTS AND SEQUENCE STRATIGRAPHY OF TRIASSIC DEPOSITES IN JULFA EASTERN AZARBAIJAN IRAN. JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)[Internet]. 2010;20(77 (GEOLOGY ISSUE)):37-50. Available from: https://sid.ir/paper/70608/en

IEEE: Copy

R. MAHARI, N. KOHANSAL GHADIMVAND, and Y. ANSARI HASANABAD, “FACIES, SEDIMENTARY ENVIRONMENTS AND SEQUENCE STRATIGRAPHY OF TRIASSIC DEPOSITES IN JULFA EASTERN AZARBAIJAN IRAN,” JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), vol. 20, no. 77 (GEOLOGY ISSUE), pp. 37–50, 2010, [Online]. Available: https://sid.ir/paper/70608/en

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