Indonesia's Ocean Resource Developments

摘要

Indonesia's offshore Exclusive Economic Zone (EEZ) can be divided into three parts from a geological point of view:rn1. Sunda Shelf: Western Indonesia's shallow water, low tectonic activity, very stable area, mostly covered by the South China Searn2. Sahul Shelf: Eastern Indonesia's shallow water with very active tectonic phenomenarn3. Central Indonesia: Very tectonically active deep water stretching from the east coast of Java and Kalimantan to the west coast of Irian JayarnThe east and the west are the most prospective areas for detrital mineral deposits. Thick quartiary sediment exists, with barren overburden up to 50 meters thick and underlying detrital bearing layers of 10 meters and more.rnThe central area possesses manganese nodules, cobalt nodules and ferro-metal mud. Because the deposit is not encouraging, no additional exploration information has been gathered in the last 30 years.rnGiven this situation, Indonesia's ocean research will be most valuable if it is concentrated on how to mine deep-seated, shallow water deposits.