Publication Date:
2024-02-02
Description:
Methane hydrates are present in marine seep systems and occur within the gas hydrate stability zone. Very little is known about their crystallite sizes and size distributions because they are notoriously difficult to measure. Crystal size distributions are usually considered as one of the key petrophysical parameters because they influence mechanical properties and possible compositional changes, which may occur with changing environmental conditions. Variations in grain size are relevant for gas substitution in natural hydrates by replacing CH4 with CO2 for the purpose of carbon dioxide sequestration. Here we show that crystallite sizes of gas hydrates from some locations in the Indian Ocean, Gulf of Mexico and Black Sea are in the range of 200–400 µm; larger values were obtained for deeper-buried samples from ODP Leg 204. The crystallite sizes show generally a log-normal distribution and appear to vary sometimes rapidly with location.
Keywords:
157-2; 204-1247B; 204-1248C; 204-1249C; 204-1250C; Batumi Seep; BS360G; BS380GR; BS383G; Bush Hill; Center for Marine Environmental Sciences; Chapopote; Colkheti Seep; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Depth comment; DRILL; Drilling/drill rig; Elevation of event; Event label; GC; GC-18; GC-6; GeoB10618; GeoB11927; GeoB11956; GeoB9913-6; GeoB9931-1; GeoB9935-2; Geological sample; GEOS; Grain size, mean; Gravity corer; Indian Ocean; Joides Resolution; Latitude of event; Leg204; Longitude of event; M67/2b; M72/3a; M72/3b; MARUM; Meteor (1986); NGHP/01_10D; North Pacific Ocean; Number; Ocean Drilling Program; ODP; OTEGA II; Pechori Mound; Professor Logachev; Sample code/label; see reference(s); SO174/2; SO174/2_157-2; Sonne; Standard deviation; Television-Grab; Temperature, technical; TTR-15; TVG
Type:
Dataset
Format:
text/tab-separated-values, 116 data points
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