THERMAL MATURITY, QUALITY AND TYPE OF THE ORGANIC MATTER IN THE SHALES OF THE SILICICLASTIC SHEMSHAK FORMATION, CENTRAL AND EASTERN ALBORZ RANGE, NORTHERN IRAN

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SHEKARIFARD A.; SEYED EMAMI KAZEM; BAUDIN F.

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Journal: Year:2007 | Volume:41 | Issue:3 (105) Page(s): 319-332

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Title

THERMAL MATURITY, QUALITY AND TYPE OF THE ORGANIC MATTER IN THE SHALES OF THE SILICICLASTIC SHEMSHAK FORMATION, CENTRAL AND EASTERN ALBORZ RANGE, NORTHERN IRAN

Author(s)

SHEKARIFARD A. | SEYED EMAMI KAZEM | BAUDIN F. | Issue Writer Certificate

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Abstract

Dispersed organic matter in the shaly sediments of the siliciclastis Shemshak Formation (Upper Triassic-Middle Jurassic) in the central and eastern Alborz mountains are categorized into three groups including (1) amorphous organic matter, (2) continental organic matter and (3) marine organic matter. Amorphous organic matter dominates in all samples which are predominately derived from degradation of bacteria and phytoplankton remains. Rock-Eval pyrolysis results of the studied shaly samples indicate the presence of hydrogen-depleted organic matter in the Shemshak Formation. According to position of the samples on the Van-Krevelen modified diagram (HI-Tmax), organic matter is considered as altered organic matter group (type IV kerogen in geochemical composition). Organic matter in the studied shales of the Shemshak Formation has experienced high temperature during burial and is now thermally post-mature (average of Tmax is 496oC). Thermal alteration is the main agent of organic matter alteration. Thick marine shales of the Shemshak Formation are rich in altered amorphous organic matter with marine phytoplanktonics origin (degraded type II kerogen). According to geochemical results the studied shales of the Shemshak Formation are classified as poor source rocks (gas-prone), which have mainly entered in gas generation window.

Cites

PALYNOMORPHS - BASED PALAEOECOLOGICAL IMPLICATIONS OF THE SHEMSHAK FORMATION, AT THE KHOSHYEILAGH SECTION, NORTHEASTERN SHAHRUD

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APA: Copy

SHEKARIFARD, A., SEYED EMAMI, KAZEM, & BAUDIN, F.. (2007). THERMAL MATURITY, QUALITY AND TYPE OF THE ORGANIC MATTER IN THE SHALES OF THE SILICICLASTIC SHEMSHAK FORMATION, CENTRAL AND EASTERN ALBORZ RANGE, NORTHERN IRAN. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), 41(3 (105)), 319-332. SID. https://sid.ir/paper/14499/en

Vancouver: Copy

SHEKARIFARD A., SEYED EMAMI KAZEM, BAUDIN F.. THERMAL MATURITY, QUALITY AND TYPE OF THE ORGANIC MATTER IN THE SHALES OF THE SILICICLASTIC SHEMSHAK FORMATION, CENTRAL AND EASTERN ALBORZ RANGE, NORTHERN IRAN. JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN)[Internet]. 2007;41(3 (105)):319-332. Available from: https://sid.ir/paper/14499/en

IEEE: Copy

A. SHEKARIFARD, KAZEM SEYED EMAMI, and F. BAUDIN, “THERMAL MATURITY, QUALITY AND TYPE OF THE ORGANIC MATTER IN THE SHALES OF THE SILICICLASTIC SHEMSHAK FORMATION, CENTRAL AND EASTERN ALBORZ RANGE, NORTHERN IRAN,” JOURNAL OF FACULTY OF ENGINEERING (UNIVERSITY OF TEHRAN), vol. 41, no. 3 (105), pp. 319–332, 2007, [Online]. Available: https://sid.ir/paper/14499/en

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