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Feasibility of Economic Gold Mining in the Juneau Gold Belt Area of the Juneau Mining District, Alaska.

PB88221189

Publication Date	1988
Personal Author	Sherman, G. E.; Baggs, D. W.
Page Count	17
Abstract	Preliminary economic mining feasibility studies were conducted by the Bureau of Mines to estimate mining costs in the Juneau gold belt area of the Juneau Mining District, southeastern Alaska. Investigations were conducted on the economics of two mineral deposit types: (1) Berners Bay vein gold deposits, and (2) stockwork gold deposits containing gold, silver, and lead. Cost estimates were developed using the Bureau of Mines Cost estimating system. Discounted cash flow return on investment was calculated using the Bureau's MINSIM computer program. Underground mining of a Berners Bay vein gold deposit was found to be economic a recoverable metal value of $353.67 for a 100 mtpd shrinkage stoping mine with a 10 yr mine life, $324.76/mt for a 20 yr mine life, $138.63/mt for a 500 mtpd longhole stoping mine with a 10 yr mine life, and $127.50/mt for a 20 yr mine life. Block caving mining of a large stockwork gold deposit was found to be economic at a recoverable metal value of $15.28/mt for a 18,000 mtpd mine with a 20 yr mine life.
Keywords	Alaska Gold Mining Cost analysis Economic analysis Local studies
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Juneau, AK. Alaska Field Operations Center.
Document Type	Technical Report
Title Note	Open file rept. (Final),
NTIS Issue Number	198819

Feasibility of Economic Gold Mining in the Juneau Gold Belt Area of the Juneau Mining District, Alaska.

Feasibility of Economic Gold Mining in the Juneau Gold Belt Area of the Juneau Mining District, Alaska.
PB88221189

Publication Date	1988
Personal Author	Sherman, G. E.; Baggs, D. W.
Page Count	17
Abstract	Preliminary economic mining feasibility studies were conducted by the Bureau of Mines to estimate mining costs in the Juneau gold belt area of the Juneau Mining District, southeastern Alaska. Investigations were conducted on the economics of two mineral deposit types: (1) Berners Bay vein gold deposits, and (2) stockwork gold deposits containing gold, silver, and lead. Cost estimates were developed using the Bureau of Mines Cost estimating system. Discounted cash flow return on investment was calculated using the Bureau's MINSIM computer program. Underground mining of a Berners Bay vein gold deposit was found to be economic a recoverable metal value of $353.67 for a 100 mtpd shrinkage stoping mine with a 10 yr mine life, $324.76/mt for a 20 yr mine life, $138.63/mt for a 500 mtpd longhole stoping mine with a 10 yr mine life, and $127.50/mt for a 20 yr mine life. Block caving mining of a large stockwork gold deposit was found to be economic at a recoverable metal value of $15.28/mt for a 18,000 mtpd mine with a 20 yr mine life.
Keywords	Alaska Gold Mining Cost analysis Economic analysis Local studies
Source Agency	Bureau of Mines
NTIS Subject Category	48A - Mineral Industries
Corporate Authors	Bureau of Mines, Juneau, AK. Alaska Field Operations Center.
Document Type	Technical Report
Title Note	Open file rept. (Final),
NTIS Issue Number	198819