+ Site Statistics
References:
54,258,434
Abstracts:
29,560,870
PMIDs:
28,072,757
+ Search Articles
+ PDF Full Text Service
How our service works
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ Translate
+ Recently Requested

Magnitude of Cenozoic erosion from mean sonic transit time, offshore Taiwan



Magnitude of Cenozoic erosion from mean sonic transit time, offshore Taiwan



Marine and Petroleum Geology 17(9): 1011-1028



Mean sonic transit times from eight stratigraphic units in forty-four wells in western and northern offshore Taiwan were plotted against depth. Apparent erosion (displacement on the depth axis from the normal compaction) was determined for each unit in each well. Cretaceous and Eocene units show greater apparent erosion than Miocene and Pliocene units in the same well, which in turn show more erosion than Pleistocene units. Apparent erosions derived from two different units are plotted against each other for correlation analysis. Based on the analysis, the main periods of erosion were during the Oligocene and Plio-Pleistocene. The timing of erosion inferred from sonic interval transit is consistent with recognized unconformities, and its areal distribution is consistent with the observed structural evolution of the region. The maximum true erosion (corrected for post-erosion burial) at the Oligocene unconformity was 3500 m on the Penghu Platform. Approximately 2500 m of true erosion occurred on the Kuanin Ulift and the Pengchiahsu Platform. Due to moderate-to-minor erosion and a great amount of post-erosion burial, true magnitude of erosion is masked at the Miocene unconformity in most of the area. Erosion of up to 500 m on the eastern side of the Penghu Island at the Pleistocene unconformity defines the shape of the present-day Penghu Waterway. In the northern offshore area up to 1000 m of Plio/Pleistocene, true erosion occurred in the Taiwan-Sinzi folded zone where Miocene folds are observed. The magnitude of true erosion decreased west of the Taiwan-Sinzi folded zone to 500 m in the Pengchiahsu Basin. A maximum of 500 m of true erosion is also observed in the west offshore area along Hsing-Chu to Miaoli coast.

Please choose payment method:






(PDF emailed within 0-6 h: $19.90)

Accession: 019361487

Download citation: RISBibTeXText

DOI: 10.1016/s0264-8172(00)00035-0


Related references

The Cenozoic tectonic evolution of offshore Taiwan. Energy (Oxford) 10(3-4): 421-432, 1985

Quantification of net uplift and erosion on the Norwegian Shelf south of 66 degrees N from sonic transit times of shale. Norsk Geologisk Tidsskrift 76(4): 245-252, 1996

Geochemical studies of Cenozoic basalts from northern, western-central and offshore Taiwan. Jingjibu Zhongyang Dizhi Diaochasuo Tekan = Special Publication of the Central Geological Survey 5: 15-37, 1991

Enhancement of long spaced sonic transit time data. Transactions of the SPWLA Annual Logging Symposium 23(1982, 1982

Neogene uplift and erosion offshore South Norway; magnitude and consequences for hydrocarbon exploration in the Farsund Basin. Special Publication of the European Association of Petroleum Geoscientists: ges 79-88. 1993., 1993

The impact of late Cenozoic uplift and erosion on hydrocarbon exploration; offshore Norway and some other uplifted basins. Global and Planetary Change 12(1-4): 415-436, 1996

Resistivity, radioactivity and sonic transit time logs to evaluate the organic content of low-permeability rocks. The Log Analyst 26(3): 36-45, 1985

The concept of acoustic formation factor for more accurate porosity determination from sonic transit time data. The Log Analyst 29(1): 54-60, 1988

The West Antarctic erosion surface; its role in determining the timing of mantle plume-activity, uplift, and erosion, during Late Cretaceous-Cenozoic time in Marie Byrd Land. International Symposium on Antarctic Earth Sciences 7(Pages 481-484, 1997

Form and magnitude of beta-sympathetic and parasympathetic influences on pulse transit time. Psychophysiology. 32(4): 329-334, 1995

A study on gastrointestinal transit time in Taiwan population. Taiwan Yi Xue Hui Za Zhi. Journal of the Formosan Medical Association 74(3): 191-195, 1975

The Cenozoic sedimentary record offshore Norway; constraining vertical motions in time and space. Geophysical Research Abstracts 10, 2008

Identification of source rocks on wireline logs by density/ resistivity and sonic transit time/ resistivity crossplots. AAPG Bulletin 68(2): 121-129, 1984

Gamma distribution models for transit time estimation in catchments; physical interpretation of parameters and implications for time-variant transit time assessment. Water Resources Research 46.10, 2010

Identification of source rocks on wireline logs by density/ resistivity and sonic transit time/ resistivity crossplots; discussion and reply. AAPG Bulletin 70(11): 1749, 1986