نتایج جستجو برای: depositional sequence

تعداد نتایج: 409161  

ژورنال: کواترنری ایران 2018
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Mirak (Semnan, Iran) is a Paleolithic site located in a dry floodplain near the northern edge of the Iranian Central Desert. The pedo-sedimentary successions of Mirak 8 are deposited from late Pleistocene to Late Holocene,. The chronological framework was established using optically stimulated luminescence (OSL) dating. The oldest studied units dating back to ~50 ± 3.0 ka. Within this stratigra...

Journal: :Sedimentology 2022

This study reports a high-resolution micromorphological characterization of floodplain deposits to investigate the relationships among compositional, textural and geotechnical data, integrate soil micromorphology with sequence stratigraphy. Compositional facies associations features are calibrated against parameters. The latter, obtained from cone penetration pocket penetrometer tests borehole ...

2002
N. CHRISTIE

Christie-Blick, N., 1991. Onlap, ofttap, and the origin of unconformity-bounded depositional sequences. Mar. Geol., 97: 35-56. Unconformity-bounded depositional sequences represent the fundamental building blocks of sedimentary successions. They are typically characterized by onlap at the base and by offlap at the top, and they tend to be markedly asymmetrical, with onlap accounting for a large...

Journal: Geopersia 2017

Four supergiant and numerous giant gasfields have been discovered in the Southwest Iran which produce from Permian-Triassic carbonates belong to the upper member of Dalan Formation and Kangan Formation. In this research a detailed biostratigraphic, microfacies and sequence stratigraphic study of the late Middle Permian to Triassic successions was undertaken from 850 thin sections prepared from ...

A. Mahboubi M. Javanbakht R. Moussavi Harami

The Tirgan Formation (Barremian – Aptian) is exposed in the Kopet Dagh in northeast Iran. One stratigraphic section in Zavin was measured with a thickness of 110 meters. This Formation in section consists of three parts (including lower carbonate, limy shale – marl and upper carbonate rocks). Based on the study of 94 thin sections, 10 carbonate and 2 siliciclastic lithofacies have been identifi...

ژورنال: ژئوفیزیک ایران 2019

Sequence stratigraphy is a key step in interpretation of the seismic reflection data. It was originally developed by seismic specialists, and then the usage of high-resolution well logs and core data was taken into consideration in its implementation. The current paper aims in performing sequence stratigraphy using three-dimensional seismic data, well logs (gamma ray, sonic, porosity, density, ...

ژورنال: :پژوهش های دانش زمین 0
الهه ستاری دانشگاه اصفهان حسین وزیری مقدم دانشگاه اصفهان علی صیرفیان دانشگاه اصفهان عزیز الله طاهری دانشگاه صنعتی شاهرود

به منظور بررسی رخساره ها، محیط رسوبی و چینه نگاری سکانسی سازند آسماری در تنگ شیوی، یک برش چینه ای مورد مطالعه قرار گرفته است؛ که دارای ضخامت 348 متر بوده و به سن روپلین، شاتین و آکیتانین می باشد. با مطالعه 266 مقطع نازک تهیه شده، بر اساس تغییرات رخساره ای و خصوصیات بافتی و سنگ شناختی16 ریزرخساره ی متفاوت تشخیص داده شد که در چهار کمربند رخساره ای پهنه جزرومدی، لاگون، سد و دریای باز نهشته شده اند...

Journal: :geopersia 2012
amir karimian torghabeh asadollah mahboubi reza moussavi-harami moyra e.j.wilson

this study shows that ichonology can be used to refine sequence stratigraphy as well as to interpret the depositional environment of the kalat formation (upper maastrichtian) in the central kopeh- dagh basin (ne iran), dareh-gaz section. field studies and petrography of these deposits led to recognize four lithofacies and nine subfacies that formed in the tidal flat (lithofacies a), lagoon (lit...

Journal: Geopersia 2012
Azizollah Taheri Haleh Rezaeian

This study is focused on the biostratigraphy, sedimentary environments, facies distribution, and sequence stratigraphy of the Coniacian–Santonian sediments of Tange-Bulfaris section. Five assemblage zones have been recognized by distribution of the foraminifera in the study area. Assemblage zone 1(Chara Ostracods zone) is Coniacian in age and occurs in the lower part of the succession. Assembl...

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