Journal of Geological Research / 2012 / Article / Fig 5

Research Article

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

Figure 5

Detailed maps of seep sites. (a) Joetsu Knoll center, (b) Umitaka Spur north, and (c) Umitaka Spur center. See Figures 1 and 4 for map locations. Yellow circles indicate giant plumes observed by echosounder during the last few years [12]. Red ellipses indicate mound seep site regions with giant plumes. Red stars indicate gas hydrate outcrops.

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