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Geochemical Analysis as a Complementary Tool to Estimate the Uplift of Sediments Caused by Shallow Gas Hydrates in Mounds at the Seafloor of Joetsu Basin, Eastern Margin of the Japan Sea
المؤلفون المشاركون
Matsumoto, Ryo
Akiba, Fumio
Freire, Antonio Fernando Menezes
المصدر
Journal of Geological Research
العدد
المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-14، 14ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2012-10-02
دولة النشر
مصر
عدد الصفحات
14
التخصصات الرئيسية
الملخص EN
The Holocene sediments of the eastern margin of the Japan Sea are characterized by high total organic carbon (TOC) and total nitrogen (TN) contents, low TOC/TN and TS/TOC values with enriched δ13Corg signatures, as a result of high marine productivity during present oxic highstand.
On the other hand, the LGM sediments are characterized by low TOC and TN contents, high TOC/TN and TS/TOC values with depleted δ13Corg signatures, characteristic of C3-derived terrestrial organic matter input during that anoxic lowstand.
However, at the top of mounds at the seafloor, where gas hydrate and authigenic carbonate nodules occur, the host sediments have a mixture of both Holocene and LGM geochemical signatures.
Both gas hydrate and authigenic carbonate, formed by the anaerobic oxidation of methane, increased the sedimentary volume and caused an uplift of older sediments, inducing mound formation.
The thickness of the Holocene sediments over mounds is very small or absent exposing the last glacial maximum (LGM) sediments to the seafloor.
The uplift of the LGM sediments within mounds is estimated to be >2 m.
We conducted geochemical analysis to detect such sediment movement, using samples collected by shallow cores in the Joetsu Basin, eastern margin of the Japan Sea.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Freire, Antonio Fernando Menezes& Matsumoto, Ryo& Akiba, Fumio. 2012. Geochemical Analysis as a Complementary Tool to Estimate the Uplift of Sediments Caused by Shallow Gas Hydrates in Mounds at the Seafloor of Joetsu Basin, Eastern Margin of the Japan Sea. Journal of Geological Research،Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-502347
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Freire, Antonio Fernando Menezes…[et al.]. Geochemical Analysis as a Complementary Tool to Estimate the Uplift of Sediments Caused by Shallow Gas Hydrates in Mounds at the Seafloor of Joetsu Basin, Eastern Margin of the Japan Sea. Journal of Geological Research No. 2012 (2012), pp.1-14.
https://search.emarefa.net/detail/BIM-502347
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Freire, Antonio Fernando Menezes& Matsumoto, Ryo& Akiba, Fumio. Geochemical Analysis as a Complementary Tool to Estimate the Uplift of Sediments Caused by Shallow Gas Hydrates in Mounds at the Seafloor of Joetsu Basin, Eastern Margin of the Japan Sea. Journal of Geological Research. 2012. Vol. 2012, no. 2012, pp.1-14.
https://search.emarefa.net/detail/BIM-502347
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-502347
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