MGB took charge of the administration and disposition of minerals and mineral lands during the Spanish Regime, but was abolished on July 1, 1886. It was transfigured during Gen. Emilio Aguinaldo's ruling and created four divisions of Departamento de Fomento, under the Philippine Revolutionary Republic. The Mines and Mountains Sections were also formed; the former was under the director of Industry and Agriculture, and the later was under the director of Obras Publicas (Department of Public Works & Highways).

The sections were re-organised after the Americans’ arrival, resulting in the emergence of the Mining Bureau. In 1905, the Mining Bureau and the Bureau of Government Laboratories were fused under the Bureau of Science, and the Mining Bureau became the Division of Geology and Mines. In 1933, the Mineral Lands Division of the Bureau of Lands was merged with the Division of Geology and Mines, under the Bureau of Science, to form a division known as the Division of Mineral Resources under the Department of Agriculture and Commerce. After one year, it was renamed Division of Mines.

With the outbreak of the Second World War, the Bureau of Mines was reconstituted under the Department of Agriculture and Commerce under Executive Order No. 1 dated January 30, 1942. In 1944, during the Puppet Philippine Republic, the Bureau of Mines shrunk again into a Division of the Department of Agriculture and Natural Resources. The revision of Commonwealth Act No. 136 in 1978 boosted it again, it was renamed Bureau of Mines and Geo-sciences Bureau. This gave it an additional function, as well as the authority to make it more responsive to the objectives of the government's minerals sector.

In June 1987, the MGB was formed under Executive Order No. 192.^[5]

In 1997, under DAO 97–11, the MGB implemented a full re-organisation specifically involving the establishment of two new divisions—the Mining Environment and Safety Division, and the Mine Tenement Management Division. These divisions operationalised the sustainable development principles provision of the Mining Act of 1995.

Legal Service Division edit

The Legal Service Division (LSD) gives legal services to the MGB so that laws, rules and regulations, and policies about the management and acquisition of mineral lands and resources can be put into place in an effective and efficient way.

Mining Tenements Management Division edit

The Mining Tenements Management Division (MTMD) is responsible for conducting the final review of all mining applications, auditing the disposal of mineral lands and resources, and managing the Mineral Rights Management System.

Sections edit

• Mining Permit Evaluation Section
• Systems Audit Development
• Mineral Rights Management System Section
• Mineral Lands Survey Section
• Mining Contract Evaluation Section

Mine Safety, Environment and Social Development Division edit

The Mine Safety, Environment, and Social Development Division (MSESDD) are responsible for investigating incidents and complaints and conducting research and development to improve mine safety and health programs, environmental management, and social development.

Sections edit

• Mine Environmental Management Section
• Mine Environmental Audit Section
• Mine Rehabilitation Section
• Social Development Section
• Mine Safety and Health Section

Mining Technology Division edit

The Mining Technology Division (MTD) is responsible for conducting Research and Development for the development of mining technologies, providing and coordinating mining technology support services, enforcing the technology transfer provisions of existing laws, rules, and regulations, implementing the National Small-Scale Mining Programs, and aiding in the investigation of complaints (including illegal mining activities).

Sections edit

• Mining Technology Development Section
• Mine Evaluation and Enforcement Section
• Small-Scale Mining Development Section
• Mineral Reserves Inventory Section

Lands Geological Survey Division edit

The Lands Geological Survey division does basic geological mapping, which serves as input for mineral exploration, energy exploration, water resources, geohazard assessment, engineering geology, environmental geology, and urban planning. It conducts engineering geological and geohazard assessments for housing, subdivision, infrastructure, and other land development projects. It addresses water-related concerns and assesses possible waste disposal sites. It is in charge of creating, maintaining, and enhancing geological database systems for the MGB.

Sections edit

• General Geology Section
• Economic Geology Section
• Hydrogeology and Environmental Geology Section
• Geological Laboratory Services Section
• Lands Geological Information Management Section
• Geohazard Assessment and Engineering Geology Section

Marine Geological Survey Division edit

The Marine Geological Survey Division conducts coastal and marine geological and geophysical surveys for mineral resource assessment, coastal geohazard assessment, geo-environmental and geoengineering studies for coastal infrastructure projects, and related geoscientific concerns. The Division also conducts research on marine geological technology and methodology, marine geology, and marine geophysics. It provides technical services concerning the conduct of marine geological and geophysical surveys.

Sections edit

• Coastal and Offshore Geological Survey Section
• Marine Geological Information Management Section
• Marine Technical Services Section
• Marine Mineral Exploration Section

Metallurgical Technology Division edit

The Metallurgical Technology Division (MeTD) is responsible for developing metallurgical techniques for beneficiating/extracting minerals/metals from ores, providing metallurgical and analytical services to the different mining stakeholders, and auditing mineral processing operations.

Sections edit

• Mineral Processing Service and Audit Section
• Mineral Processing Research and Development Section
• Chemical Laboratory Service Section
• Mechanical-Electrical Service Section

Mineral Economics, Information and Publication Division edit

The Mineral Economics, Information, and Publications Division (MEIPD) are responsible for conducting policy studies on mineral economics and disseminating data on mining and geosciences.

Sections edit

• Mineral Statistics Section
• Mineral Economics Section
• Mineral Information and Publication Section
• Library

Planning, Policy and International Affairs Division edit

The Planning, Policy, and International Affairs Division (PPIAD) are responsible for planning, programming, monitoring, and evaluating programs/projects/activities; initiating policy formulation; coordinating the development and implementation of programs/projects and policy formulation; initiating, coordinating, and maintaining international cooperation and commitments; and coordinating the design, installation, and maintenance of national and regional management information systems.

Sections edit

• Policy Studies and Project Development
• Planning and Monitoring
• Information System Group

Financial Management Division edit

The Financial Management Division (FMD) will provide financial analysis to assist in planning, monitoring, and decision-making.

Sections edit

• Budget
• Financial Service Group

Administrative Division edit

The Administrative Division (AD) is responsible for personnel, property, and record administration.

Sections edit

• Human Resource Management Section
• Cashiering Section
• General Services Section
• Property Management Section
• Records Management Section
• Engineering Service Unit
• Bids and Awards Committee (BAC)

Currently, there are 15 regional bureau offices in the entire country.

•   Media related to Mines and Geosciences Bureau at Wikimedia Commons
• Mines and Geosciences Bureau website
• Department of Environment and Natural Resources website