PALAEOENVIRONMENTAL STUDY OF THE GURPI FORMATION AT FARHADABAD SECTION (NORTHEAST OF KABIRKUH) BASED ON PALYNOFACIES AND ORGANIC GEOCHEMISTRY ANALYSIS

Q: How can I download an article?

To download an article from SID, first log in to the site, search for the article title, and click on the 'Download Article' option.

Q: How can I download an ISI article?

To download an ISI article on SID, enter the keyword or article title in the search bar, view the relevant results, click on the desired article, and select the 'Download Article' option.

Q: How can I access the SID database?

To access the SID database, visit SID.ir, create an account, and log in to access scientific resources.

Q: Is downloading articles from SID free?

Some articles on SID are available for free, while others require payment. Details are specified on the article's page.

ZAREI E.; GHASEMI NEJAD E.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

Paper Information

Journal: GEOSCIENCES Year:2015 | Volume:24 | Issue:95 (STRATIGRAPHY & SEDIMENTOLOGY) Page(s): 12-22

Download Full-Text

Persian Verion

View:

722

Download:

Cites:

Information Journal Paper

Title

PALAEOENVIRONMENTAL STUDY OF THE GURPI FORMATION AT FARHADABAD SECTION (NORTHEAST OF KABIRKUH) BASED ON PALYNOFACIES AND ORGANIC GEOCHEMISTRY ANALYSIS

Author(s)

ZAREI E. | GHASEMI NEJAD E. | Issue Writer Certificate

Keywords

WATER-LEVEL FLUCTUATIONSQ2

ORGANIC GEOCHEMISTRY ANALYSISQ2

PALYNOFACIESQ2

GURPI FORMATIONQ2

CAMPANIAN-MAASTRICHTIANQ2

ZAGROS BASINQ1

IRANQ2

Abstract

The GURPI FORMATION at Farhadabad section in west of Darehshahr, was studied in detail for environmental changes and water–level fluctuations via using organic matter contents of the rock samples. Depositional environment interpretation was done based on integration of evidences derived from ORGANIC GEOCHEMISTRY ANALYSIS (TOC, TIC and Aliphatic n-alkane (short, mid and long chain n-alkane to sum of n-alkane, TAR (terrigenous-aquatic ratio), CPI (Carbon Preference Index), ratio of C17 to C27 and Isoperinoids (pr/ph, pr+ph/nC17+nC18, pr/nC17and ph/ nC18) and PALYNOFACIES data (Amorphous organic matter, marine palynomorphs and palynomaceral). Statistical studies on palynomorphs confirm the results gained from the organic geochemical analysis. High ratio of palynomaceral and high TAR and CPI and dominance of long chain n- alkane and low ratio of C17/C27 (C17 relative to C27) and high ratio of Pr/Ph (>1) indicate regression condition at the base of the GURPI FORMATION, Lopha Member, top of Emam-Hassan Member and Cretaceous – Tertiary boundary. On the other hand high abundance of marine palynomorphs and transparent amorphous organic matter and unimodal n-alkane with a marked even over odd predominance (CPI< 1) and TAR<1 and high C17/C27 (C17 relative to C27) and low ratio of pr/nC17<0.5 indicate transgressive condition in upper part of Globotruncanita stuartiformisbiozones, black shales between Lopha and Emam- Hassan, upper part of Contusotruncana contusa biozones and at the base of purple shale of the Pabdeh Formation. Maximum flooding surface probably equates the 70 Ma MFS K175, 68 Ma MFS K180 and 58 Ma MFS Pg10 of Sharland et al., 2001 that is recorded in many parts of the Arabian Plate. The relative sea level curve resulted in form this study is well in accord with the existing eustasy curves especially for the Campanian- Maastrichtian boundary indicating effect of eustasy on relative sea- level changes during this period. Combining all these data, an open marine environment with terrestrial organic input under suboxic to anoxic conditions can be concluded for the depositional course of the GURPI FORMATION.

Cites

No record.

References

No record.

Cite

APA: Copy

ZAREI, E., & GHASEMI NEJAD, E.. (2015). PALAEOENVIRONMENTAL STUDY OF THE GURPI FORMATION AT FARHADABAD SECTION (NORTHEAST OF KABIRKUH) BASED ON PALYNOFACIES AND ORGANIC GEOCHEMISTRY ANALYSIS. GEOSCIENCES, 24(95 (STRATIGRAPHY & SEDIMENTOLOGY)), 12-22. SID. https://sid.ir/paper/31587/en

Vancouver: Copy

ZAREI E., GHASEMI NEJAD E.. PALAEOENVIRONMENTAL STUDY OF THE GURPI FORMATION AT FARHADABAD SECTION (NORTHEAST OF KABIRKUH) BASED ON PALYNOFACIES AND ORGANIC GEOCHEMISTRY ANALYSIS. GEOSCIENCES[Internet]. 2015;24(95 (STRATIGRAPHY & SEDIMENTOLOGY)):12-22. Available from: https://sid.ir/paper/31587/en

IEEE: Copy

E. ZAREI, and E. GHASEMI NEJAD, “PALAEOENVIRONMENTAL STUDY OF THE GURPI FORMATION AT FARHADABAD SECTION (NORTHEAST OF KABIRKUH) BASED ON PALYNOFACIES AND ORGANIC GEOCHEMISTRY ANALYSIS,” GEOSCIENCES, vol. 24, no. 95 (STRATIGRAPHY & SEDIMENTOLOGY), pp. 12–22, 2015, [Online]. Available: https://sid.ir/paper/31587/en

Related Journal Papers