THERMAL MATURITY OF THE ORGANIC BEARING SEDIMENTS: “FLUID INCLUSION STUDIES ON THE SHEMSHAK GROUP IN N ALBORZ”

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SHALIKAR H.; REZAEIAN M.; AMIRI A.; PADYAR F.; ZAMANI Z.; BAHROUDI A.

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Journal: JOURNAL OF GEOTECHNICAL GEOLOGY (APPLIED GEOLOGY) Year:2011 | Volume:7 | Issue:2 Page(s): 121-130

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Title

THERMAL MATURITY OF THE ORGANIC BEARING SEDIMENTS: “FLUID INCLUSION STUDIES ON THE SHEMSHAK GROUP IN N ALBORZ”

Author(s)

Keywords

SHEMSHAK GROUPQ2

THERMAL MATURATIONQ2

FLUID INCLUSION THERMOMETRYQ2

VITRINITE REFLECTANCEQ2

APATITE FISSION TRACKQ2

Abstract

In this study, we use different approaches to evaluate thermal maturity of the siliciclastic and coal-bearing sediments of the Upper Triassic-Middle Jurassic SHEMSHAK GROUP in North Alborz. Fluid inclusion (FI) and VITRINITE REFLECTANCE (VR) techniques are applied directly and compared with the previous results of the thermal history of this group obtained by APATITE FISSION TRACK (AFT) study. Outcrop samples were collected from three members of Ekrasar, Laleband and Kalariz from the base to top, respectively. For this aim, the primary and secondary fluid inclusions in the diagenetic cements of the sandstone - limestone samples and vitrinite reflection in shale –coal facies are studied to estimate the maximum burial temperature. The homogenization temperature (TH) has been estimated using FI micro thermometry on 73 inclusions. It varies between 115 to 75oC and displays a reasonably high resolution to differentiate between the top and base of the section in terms of maximum burial temperature. Accordingly, the paleo-geothermal gradient is estimated ~ 35oC/km for the period of time of the maximum burial. Considering the paleo-geothermal gradient, maximum burial depth of the SHEMSHAK GROUP was 2900 m in Galandrud section. In this study, VR has also been estimated between 1.05 to 0.67 percent. We conclude that FI micro thermometry and VR results consistently coincide with other parameters used before, indicating the low to moderate thermal maturity of the Upper Triassic- Middle Jurassic in the North Alborz section.

Cites

PRIMARY EVALUATION OF COAL BED METHANE GENERATION AND STORAGE FROM KLARIZ FORMATION (SHEMSHAK GROUP) COAL SEAMS IN GALANDRUD AREA, CENTRAL ALBORZ

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APA: Copy

SHALIKAR, H., REZAEIAN, M., AMIRI, A., PADYAR, F., ZAMANI, Z., & BAHROUDI, A.. (2011). THERMAL MATURITY OF THE ORGANIC BEARING SEDIMENTS: “FLUID INCLUSION STUDIES ON THE SHEMSHAK GROUP IN N ALBORZ”. JOURNAL OF GEOTECHNICAL GEOLOGY (APPLIED GEOLOGY), 7(2), 121-130. SID. https://sid.ir/paper/127036/en

Vancouver: Copy

SHALIKAR H., REZAEIAN M., AMIRI A., PADYAR F., ZAMANI Z., BAHROUDI A.. THERMAL MATURITY OF THE ORGANIC BEARING SEDIMENTS: “FLUID INCLUSION STUDIES ON THE SHEMSHAK GROUP IN N ALBORZ”. JOURNAL OF GEOTECHNICAL GEOLOGY (APPLIED GEOLOGY)[Internet]. 2011;7(2):121-130. Available from: https://sid.ir/paper/127036/en

IEEE: Copy

H. SHALIKAR, M. REZAEIAN, A. AMIRI, F. PADYAR, Z. ZAMANI, and A. BAHROUDI, “THERMAL MATURITY OF THE ORGANIC BEARING SEDIMENTS: “FLUID INCLUSION STUDIES ON THE SHEMSHAK GROUP IN N ALBORZ”,” JOURNAL OF GEOTECHNICAL GEOLOGY (APPLIED GEOLOGY), vol. 7, no. 2, pp. 121–130, 2011, [Online]. Available: https://sid.ir/paper/127036/en

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