Residual gas in extensive stratified Miocene Izura carbonate concretions exhibiting thermogenic origin and isotopic fractionation associated with carbonate precipitation

Department of Earth and Planetary Sciences

Jul. 10, 2020

Press release (in Japanese)

Highlights:

• One of the largest carbonate concretions was formed in the late Early Miocene.
• The Izura carbonate concretions originated from thermogenic methane.
• Methane leakage from reservoir occurred with tectonic formation of Japan Sea.
• Carbon isotopic fractionation during carbonate precipitation was determined.

Read the original article on Marine and Petroleum Geology

Article Information:
“Residual gas in extensive stratified Miocene Izura carbonate concretions exhibiting thermogenic origin and isotopic fractionation associated with carbonate precipitation.”
Daichi Maeyamaa, Noriyuki Suzuki, Keisuke Kazukawaa, and Hisao Ando
Marine and Petroleum Geology, May 15, 2020.
DOI: 10.1016/j.marpetgeo.2020.104466