Abstract
In this research, biostratigraphy related to the Asmari Formation at the southern flank of Mish anticline, Izeh Zone, is discussed. In the studied stratigraphic section, the Asmari Formation overlies the Pabdeh Formation and underlies Quaternary sediments. A study of 192 samples of the 328 m-thick Asmari Formation led to identification of 16 species and 26 genera of foraminifera taxa and identification of four Oligocene biozones. The Globigerina spp. and Nummulites intermedius- vascus Assemblages Zones represent the Rupelian age. The Ruplian- Chattian age is also defined by Lepidocyclina- Operculina- Ditrupa Assemblages Zone and Archias asmaricus- Miogyosinoides spp. Assemblages Zones that indicates a Chattian age.
Highlights
Based on the sedimentary sequence, magmatism, metamorphism, structural setting and intensity of deformation, the Iranian Plateau has been subdivided into several zones, including Zagros, Sanandaj- Syrjan, Urumieh-Dokhtar, Central Iran, Alborz, Kopeh-Dagh, Lut and Makran (Figure 1A).The Zagros Mountain is southern part of an Alpine oroganic (Alavi, 2004)
Biostratigraphy of the Asmari Formation has been the subject of detailed study ever since the irst petroleum reservoirs were discovered, in Masjed Soleyman area
Van Buchem et al (2010) proposed that lateral facies changes may cause stratigraphic traps to appear in the Asmari Formation.This paper deals with biostratigraphy study of Asmari Formationm outcrop at southern lank of Mish anticline (Tang-E Malaghon in the Izeh Zone), whose results could contribute to a better understanding of the subsurface Asmari Formation in adjacent oilield areas
Summary
Based on the sedimentary sequence, magmatism, metamorphism, structural setting and intensity of deformation, the Iranian Plateau has been subdivided into several zones, including Zagros, Sanandaj- Syrjan, Urumieh-Dokhtar, Central Iran, Alborz, Kopeh-Dagh, Lut and Makran (Figure 1A). The Zagros Mountain is southern part of an Alpine oroganic (Alavi, 2004). It extends from southeastern Turkey through the northern Syria and Iraq to western and southern Iran (Ghazban, 2007). Van Buchem et al (2010) proposed that lateral facies changes may cause stratigraphic traps to appear in the Asmari Formation.This paper deals with biostratigraphy study of Asmari Formationm outcrop at southern lank of Mish anticline (Tang-E Malaghon in the Izeh Zone), whose results could contribute to a better understanding of the subsurface Asmari Formation in adjacent oilield areas. The studied stratigraphic section is located at southern lank of Mish anticline (Figure 3c) with geographic coordinates 50o 56′ 22′′ E and 30o 18′ 11′′ N. The Asmari Formation is 336 m thick in study section and overlies the Pabdeh Formation and underlies the Quaternary sediments
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