MICROFACIES AND SEDIMENTARY ENVIRONMENTS OF THE TRIASSIC ROCKS OF NAKHLAK AREA IN NORTHEASTERN NAIN (CENTRAL IRAN)

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VAZIRI SEYED HAMID

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Journal: JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY) Year:2006 | Volume:16 | Issue:61 (GEOLOGY ISSUE) Page(s): 1-26

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Title

MICROFACIES AND SEDIMENTARY ENVIRONMENTS OF THE TRIASSIC ROCKS OF NAKHLAK AREA IN NORTHEASTERN NAIN (CENTRAL IRAN)

Author(s)

VAZIRI SEYED HAMID | Issue Writer Certificate

Keywords

NAKHLAK GROUPQ3

TRIASSICQ3

MICROFACIESQ3

CONTINENTAL AND MARINE ENVIRONMENTSQ3

CENTRAL IRANQ3

Abstract

The TRIASSIC rocks of the Nakhalak area with a thickness of 2701 meters are divided into three formations: Alam Formation, Baqoroq Formation and Ashin Formation which their outcrops as Nakhalak Group are bounded by two thrust faults.The Alam Formation (1298 m) with Late Scythian to Middle Anisian age consists of two facies groups; carbonate facies in the lower and upper parts of succession and the clastic facies (sandstone and shale) dominantly volcanogenic in the upper parts. Basal part of the Alam Formation consists of dolomitized oolitic limestone, oosparite, oolitic pelmicrate, lithic arenite and orthomicroconglomerate facies. Among these facies, oosparite facies shows sedimentation in platform with high energy, oolitic facies were deposited in oolitic bars environments and pelmicrate facies were deposited in limited environemts such as lagoon in continental shelf. The clastic part of the Alam Formation consists of lithic arenite, tuffaceous lithic greywacke, calclithite, interformational conglomerate and carbonate facies, which were deposited in continental slope, continental rise and abyssal plain as submarine fans.The Baqoroq Formation (1122m) with Late Anisian? to Middle Ladinian age dominantly consists of conglomerate, sandstone and shale. This formation includes lithic arenite, calclithite, orthomicroconglome rate and feldspathic greywacke facies.These facies were derived from a continental environment and deposited as alluvialfans, meandering and braided rivers.The Ashin Formation (281m) with Late Ladinian to Early Carnian? Age consists of clastic facies (dominanly sandstone and shale), which were deposited at the end of continental slope to abyssal plain, as submarine fans (distal part). This formation includes alokmical microcristaline limestone and lithic arenite facies. The TRIASSIC rocks of Nakhlak differ completely from the shallow carbonatic and platform successions of lower and middle TRIASSIC of Iran. The only correlative TRIASSIC succession to these rocks is TRIASSIC succession of Aghdarband area in northeastern Iran.

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APA: Copy

VAZIRI, SEYED HAMID. (2006). MICROFACIES AND SEDIMENTARY ENVIRONMENTS OF THE TRIASSIC ROCKS OF NAKHLAK AREA IN NORTHEASTERN NAIN (CENTRAL IRAN). JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), 16(61 (GEOLOGY ISSUE)), 1-26. SID. https://sid.ir/paper/70524/en

Vancouver: Copy

VAZIRI SEYED HAMID. MICROFACIES AND SEDIMENTARY ENVIRONMENTS OF THE TRIASSIC ROCKS OF NAKHLAK AREA IN NORTHEASTERN NAIN (CENTRAL IRAN). JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY)[Internet]. 2006;16(61 (GEOLOGY ISSUE)):1-26. Available from: https://sid.ir/paper/70524/en

IEEE: Copy

SEYED HAMID VAZIRI, “MICROFACIES AND SEDIMENTARY ENVIRONMENTS OF THE TRIASSIC ROCKS OF NAKHLAK AREA IN NORTHEASTERN NAIN (CENTRAL IRAN),” JOURNAL OF SCIENCES (ISLAMIC AZAD UNIVERSITY), vol. 16, no. 61 (GEOLOGY ISSUE), pp. 1–26, 2006, [Online]. Available: https://sid.ir/paper/70524/en

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