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Mineral resource assessment activities in Albuera, Leyte

The Mines and Geosciences Burea Regional Office No. 8 through its Geology Division conducted mineral assessment along Bacan River in Albuera, Leyte.

The mineral assessment integrated geological survey and resource estimation, geochemical survey and environmental baseline studies. The assessment was confined to the middle segment or the active river channel that stretches to about 4 kilometers to the lower segment of relatively flat terrain.

Bacan River is a single thread meandering to sinuous stream that traverses the barangays of Salvacion, Dumalaan and Tinag-an in the municipality of Albuera, Leyte.

The Team identified and estimated sand and gravel resources along Bacan River. The estimated area covered by river deposits is 25,750 square meters. The estimated volume of sand and gravel deposits within Bacan River is about 35,000 cubic meters with 87,500 computed tonnage.Panned stream sediments (sand concentrate) are predominantly composed of magnetite mineral (Fe3O4), few amounts of mica, feldspar, and quartz.

Meanwhile, geohazard that may be attributed to sand and gravel activities along Bacan River is over extraction of deposits and uncontrolled and unmitigated excavation of gravel on the river bank which may cause riverbank incision. Likewise, this will lead to the collapse of riverbank causing damage to properties and river structure. However, environmental scoping indicated that there are several developments of river structure projects of the LGU to protect the river from erosion.

Mineral Resource Assessment along Major Rivers is a project of the Mines and Geosciences Bureau primarily focused on the identification, delineation, and estimation of resources for river sand and gravel, including lahar deposits and other industrial minerals present along the river system.

The activity also aims to identify value-adding minerals, particularly Au and Fe minerals, precious and base metals of economic interest associated with sand and gravel deposits. The result of the exploration will estimate the available resources, particularly sand and gravel deposits as construction materials to support the Build, Build, Build Program of the National Government.