1. Geological conditions: The Philippines is located in the volcanic belt around the Pacific Ocean, with active geological structure and frequent natural disasters such as earthquakes, volcanoes and hydrothermal solutions, which provide necessary materials and energy for the formation of nickel deposits.

2. Sedimentation: The Philippines experienced large-scale transgression and land invasion, and sedimentation played an important role in the formation of nickel deposits.

3. Chemical reduction: Most nickel mines in the Philippines are nickel oxide deposits, which is due to the influence of oxidation reduction, resulting in the oxidation reaction of nickel minerals in geological history and the formation of nickel oxide deposits.

4. Hydrothermal process: Most nickel deposits in the Philippines are hydrothermal nickel deposits. This is because of the influence of hydrothermal action, nickel in underground hot water is deposited in underground rocks, forming hydrothermal nickel deposits.