butane gas hydrates / gas hydrate proxies / void gas vs. depth / accretionary complex gas hydrates / geochemistry gas hydrates / gas expansion / lithology gas hydrates / temperature-pressure-conductivity tool / lithostratigraphy gas hydrates / gas hydrate saturation cementation model / void gas samples / gas hydrate stability zone / decomposed gas hydrates / downhole logging gas hydrate proxies / gas hydrate dissociation boron / hydrate-bound gas / free gas saturation / gas hydrate shape / pressure core gas / gas hydrate stability zone ethylene sediments / gas expansion cracks / gas hydrate formation / free gas saturation vs. depth / methane/seawater/hydrate stability zone gas / gas hydrate proxies intercalibration / gas hydrate occurrence / gas hydrate anomalies / gas hydrate saturation vs. depth / infrared scanning gas hydrate proxies / gas hydrate stability zone acetate / void gas / free gas zone gas hydrates / gas hydrate occurrence zone correlation / gas hydrates / gas transport bottom-simulating reflector / gas hydrate dissociation / gas transport / hexane core void gas / /