meteorite lands on the earth, the chemical reactions produced by the earth with sufficient oxygen , water and soil will eventually turn the meteorite into a soil that we cannot recognize over time. This process of oxidation, hydration and dissolution of is a chemical weathering reaction process, which is what we are familiar with chemical weathering , weathering.
In meteorites, the first chemical reaction is the iron in the meteorite. When the iron is oxidized, its color changes from silvery white to brown, it will slowly pollute the original olivine and pyroxene minerals in meteorites.
1 Gold Basin Meteorite
Weathering of meteorites is different due to the different texture of the meteorites, and the changes and degrees of weathering are also different. For example, stone meteorite is mainly composed of silicate minerals and some iron nickel metal minerals. In addition to the pollution of iron oxide (rust) formed by iron oxidation, silicate minerals will also become clay mineral due to long-term oxidation. This is why it is difficult to find stone meteorites stored in the wild for hundreds of thousands of years.
Inner Mongolia Wulong Olive Meteorite
During the landing process of stone meteorite, the surface fused crust of is easily formed into shrinkage cracks (commonly known as crack ), and shrinkage cracks are an important way for water to enter the inside of the meteorite to undergo chemical weathering. (About the color and appearance changes caused by the weathering process of stone meteorites, which will not be repeated here). When the surface of the stone meteorite is severely weathered, a very thick weathered layer will be formed instead of the original melted crust. Such meteorites are placed in the wild. If they are not experienced, most people will easily regard it as earth rocks with thick weathered crusts.
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Brenham Olive meteorite
In meteorite trading, severe weathering meteorites are not as popular as fresh meteorites, but it does not mean that severe weathering meteorites are of no value. Whether the weathering is serious is in the price impact, which is mainly reflected in the same meteorite rain . Meteorites found in the same place are relatively compared with the same species of meteorites. The price of severe weathering is much calmer than that of the same species of meteorites. Most of the time, the price of meteorites is mainly based on the varieties of meteorites.
Seymchan Olive Meteorite
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