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How do ore form
Release time:
2025-03-14
The formation process of ore not only depends on geological conditions, but also is affected by various factors such as time, temperature, and pressure. These processes work together to ultimately form the various ore resources we see.
Ore formation is a complex geological process that usually takes millions or even billions of years. The following are the main ways and stages of ore formation:
1. magma effect
Deep underground, the magma gradually cools and solidifies, and the minerals in it will crystallize and enrich, forming magma deposits. For example, chromite and magnetite are formed in this way.
2. Section
In the vast water environment, weathered rock debris and dissolved chemicals gradually evolve into sedimentary deposits after transportation, deposition and compaction. For example, coal, oil, limestone, and iron ore in sandstone are all products of this process.
3. Spoilation
Under the combined action of high temperature, high pressure and chemically active fluids, the mineral composition, structure and structure of the original rock undergo profound changes, thus forming metamorphic ore deposits. For example, graphite and marble mines are typical examples.
4. Hydrothermal action
Mineral-rich hydrothermals migrate and precipitate in the cracks and pores of the rock, eventually forming a hydrothermal deposit. For example, gold mines, lead-zinc mines, etc. were born in this process.
5. Other functions
Gas becomes solid: For example, sulfur steam or H2S gas emitted by a volcano can be directly sublimated into natural sulfur when the temperature drops sharply.
The liquid state becomes solid state: includes evaporation and crystallization from solution or cooling, such as stone salt in a salt lake.
Solid state becomes solid state: For example, amorphous volcanic glass gradually turns into crystalline minerals after a long period of time.
The formation process of ore not only depends on geological conditions, but also is affected by various factors such as time, temperature, and pressure. These processes work together to ultimately form the various ore resources we see.
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The gangue components in iron ore are mainly
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