Objective Recent exploration indicates several localities with significant gold, copper, and zinc resource potential in the Asmara district, Eritrea, including the Emba Derho and Debarwa volcanic-associated massive s...Objective Recent exploration indicates several localities with significant gold, copper, and zinc resource potential in the Asmara district, Eritrea, including the Emba Derho and Debarwa volcanic-associated massive sulfide deposits. These deposits are hosted by the Neoproterozoic metamorphic volcanic rocks of Asmara green stone belt, which strike NNW-SSE and are 200 km long and 5-20 km wide, and the mineralization is often associated with the altered and deformed rocks. The Emba Derho deposit, located 12 km northwest of Asmara （Fig. la）, the capital of Eritrea, is the largest Cu-Zn-Au VMS deposit in the Asmara metallogeny belt. It is estimated that the Emba Derho deposit of the Asmara project contains total reserves of 49.8~106 tons of copper ores and 16.8~106 tons of zinc ores. The gold grade of this deposit is about 0.3 lg/t. The Debarwa deposit, situated 26 km southwest of Asmara, has similar ore features with the Emba Derho deposit.展开更多
基金funded by the National Nature Science Foundation of China(grant No.41372096)the project of China Geological Survey(grant No.1212011220911)
文摘Objective Recent exploration indicates several localities with significant gold, copper, and zinc resource potential in the Asmara district, Eritrea, including the Emba Derho and Debarwa volcanic-associated massive sulfide deposits. These deposits are hosted by the Neoproterozoic metamorphic volcanic rocks of Asmara green stone belt, which strike NNW-SSE and are 200 km long and 5-20 km wide, and the mineralization is often associated with the altered and deformed rocks. The Emba Derho deposit, located 12 km northwest of Asmara （Fig. la）, the capital of Eritrea, is the largest Cu-Zn-Au VMS deposit in the Asmara metallogeny belt. It is estimated that the Emba Derho deposit of the Asmara project contains total reserves of 49.8~106 tons of copper ores and 16.8~106 tons of zinc ores. The gold grade of this deposit is about 0.3 lg/t. The Debarwa deposit, situated 26 km southwest of Asmara, has similar ore features with the Emba Derho deposit.
