New gas-hydrate phase: Synthesis and stability of clay–methane hydrate intercalate

Research Article| July 01, 2003 New gas-hydrate phase: Synthesis and stability of clay–methane hydrate intercalate Stephen Guggenheim; Stephen Guggenheim 1Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, USA Search for other works by this author on: GSW Google Scholar August F. Koster van Groos August F. Koster van Groos 1Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, USA Search for other works by this author on: GSW Google Scholar Author and Article Information Stephen Guggenheim 1Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, USA August F. Koster van Groos 1Department of Earth and Environmental Sciences, University of Illinois at Chicago, Chicago, Illinois 60607, USA Publisher: Geological Society of America Received: 07 Jan 2003 Revision Received: 13 Mar 2003 Accepted: 19 Mar 2003 First Online: 02 Jun 2017 Online ISSN: 1943-2682 Print ISSN: 0091-7613 Geological Society of America Geology (2003) 31 (7): 653–656. https://doi.org/10.1130/0091-7613(2003)031<0653:NGPSAS>2.0.CO;2 Article history Received: 07 Jan 2003 Revision Received: 13 Mar 2003 Accepted: 19 Mar 2003 First Online: 02 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Tools Icon Tools Get Permissions Search Site Citation Stephen Guggenheim, August F. Koster van Groos; New gas-hydrate phase: Synthesis and stability of clay–methane hydrate intercalate. Geology 2003;; 31 (7): 653–656. doi: https://doi.org/10.1130/0091-7613(2003)031<0653:NGPSAS>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract Intercalated Na-rich montmorillonite–methane hydrate was synthesized for the first time. The upper limit of stability for the intercalate in pressure and temperature is parallel to that of methane hydrate but at temperatures that are ∼0.5–1 °C lower than for methane hydrate. The low-temperature stability of the intercalate is at −11.5 ± 3 °C at ∼40 bar, where methane and some H2O are expelled from the region between the silicate layers (interlayer). In contrast, methane hydrates do not dissociate at these low temperatures. We conclude that at conditions similar to where methane hydrate is stable, smectite may intercalate with methane hydrate and provide additional sinks for methane. The limitation in the stability of smectite–methane hydrate intercalate at low temperatures suggests that, if present in large quantities, it may release at decreasing temperatures sufficient methane to ameliorate a planetary cooling event. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.