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Minerals Report - International Seabed Authority

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Table 1. List of observed gas hydrate occurrences (modified after Ginsberg and<br />

Soloviev * ; Kvenvolden * )<br />

Ocean<br />

Pacific<br />

Pacific<br />

Pacific<br />

Region<br />

Middle America Trench, off Costa<br />

Rica<br />

Middle America Trench, off<br />

Guatemala<br />

Middle America Trench, off<br />

Mexico<br />

Observations<br />

Hydrates in core from site 565<br />

(DSDP Leg 84)<br />

Hydrates in cores from sites 496-<br />

498 (DSDP Leg 67), sites 568, 570<br />

(DSDP Leg 84)<br />

Hydrates in cores from sites 490-<br />

492 (DSDP Leg 66)<br />

Pacific Offshore northern California Hydrates in shallow cores<br />

Pacific Cascadia Basin, off Oregon<br />

Pacific<br />

Pacific<br />

Okhotsk Sea, offshore Paramushir<br />

Island<br />

Deryugin Basin, Okhotsk Sea, off<br />

Sakhalin Island<br />

Pacific Okushiri Ridge, Japan Sea<br />

Pacific Nankai Trough, off Japan<br />

Pacific Peru Trench (south of 9˚ S)<br />

Atlantic Gulf of Mexico<br />

Atlantic<br />

Blake Outer Ridge, off southeast<br />

US coast<br />

Hydrates in cores from site 892<br />

(ODP Leg 146)<br />

Hydrates in shallow cores<br />

Hydrates in shallow cores<br />

Hydrates in cores from site 796<br />

(ODP Leg 127)<br />

Hydrates in cores from site 808<br />

(ODP Leg 131)<br />

Hydrates in cores from sites685,<br />

688 (ODP Leg 112)<br />

Hydrates in core from site 618<br />

(DSDP Leg 96) and hydrates in<br />

shallow cores<br />

Hydrates in core from site 533<br />

(DSDP Leg 76)<br />

---------- Black Sea Hydrates in shallow cores<br />

---------- Caspian Sea Hydrates in shallow cores<br />

The worldwide locations of known and inferred gas hydrates that<br />

include the areas of outer continental margins, and areas of onshore and<br />

offshore permafrost, are shown in Figure 2.<br />

INTERNATIONAL SEABED AUTHORITY 521

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