Petroleum Science >2014,??Issue 1:??14-27 DOI: https://doi.org/10.1007/s12182-014-0314-9
High-frequency and low-amplitude relative sea-level changes in the Turonian Ferron Notom Delta, Henry Mountains region Utah, USA: implications for sequence stratigraphy and hydrocarbon exploration Open?Access
文章信息
作者：Li Weiguo and Zhu Yijie
作者單位：
BP America Inc., 501 Westlake Park, Houston, Texas, USA 77079 and Chevron Energy Technology Company, 1500 Louisiana Street, Houston, Texas, USA 77002
投稿時(shí)間：2013-01-01
引用方式：Li, W. & Zhu, Y. Pet. Sci. (2014) 11: 14. https://doi.org/10.1007/s12182-014-0314-9
文章摘要
The Turonian Notom Delta is one of the Ferron fluvial-deltaic wedges deposited in the foreland basins of the Cretaceous Seaway of North America. The wedge is exposed three dimensionally in the Henry Mountains region Utah, USA. High-resolution sequence stratigraphic analysis along a 35 km dip-oriented outcrop belt shows that the wedge consists of six depositional sequences. Ammonite and Inoceramid biostratigraphy and 40Ar/39Ar age dating of various bentonites show that the wedge was deposited from 91.25 Ma to 90.63 Ma, an interval of merely 0.62 Ma. Assuming each sequence is formed over a similar time span, each sequence, thus, represents about 105 yr, suggesting high-frequency depositional sequences. Amplitude of relative sea-level changes, built on shoreline trajectory, is 2-61 m, with an average of only 20 m. Fluvial incision during high-frequency and low-amplitude relative sealevel fall is mainly around the highstand prism. Incision diminishes rapidly up dip and down dip, and the resultant incised valleys are narrow and shallow. Such sea-level fluctuations also result in small, stratigraphically complex shoreline sandstones that need special attention during hydrocarbon exploration.
關(guān)鍵詞
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Ferron Notom Delta, time stratigraphy, shoreline trajectory, age dating, Cretaceous Seaway of North America