Collecting meteorites is naturally more concerned about meteorites and eager to learn about meteorites. Meteorite experts have also painstakingly introduced readers some knowledge and techniques for identifying meteorites.
Meteorite expert Zhang Baolin and deputy dean of the School of Earth Sciences Miao Bingkui introduced that meteorite collectors need to confirm the type and composition of meteorites and require scientific appraisal. Usually people mostly hope that authoritative appraisal agencies can solve this problem. In fact, in many cases , Simple detection methods can initially determine the authenticity.
Generally unprofessional institutions, do not have meteorite specimen data, and do not know how to read the data. This is one of the important reasons for blind collection. For example, the current manganese content of meteorites does not exceed 0.4, and some so-called institutions To call manganese ore a high-manganese meteorite is simply nonsense. I don't understand science at all, and I don't know meteorites at all.
When a meteorite is flying at high altitude, its surface temperature can reach several thousand degrees Celsius. Under such high temperature, on the meteorite surface melts and becomes liquid. Later, due to the blocking of the dense low-level atmosphere, its speed became slower and slower, and the molten surface cooled down, forming a thin shell of called "melt crust". The melting crust is very thin, usually about 1 mm, and the color is black or brown. During the cooling process of the molten crust, the traces of air blowing on the surface of the meteorite are also preserved, called "airmarks." The airmark looks like a fingerprint on the dough. If there is both a "melt crust" and a "airmark" on the surface of a stone. It will be mistaken for meteorites.
These are also formed in the earth's volcanic eruption or natural conditions, and even many people misunderstand and misunderstand the fusion crust of meteorites.
In the chemical element analysis of meteorites, it is necessary to understand that minerals will undergo high-temperature mineral reorganization at a temperature of several thousand degrees Celsius, which is equivalent to unprofessional refining, but some of the more molten minerals will naturally volatilize, leaving some Trace or small amount of mineral element.
According to the current international meteorite research data and the chemical analysis of my country’s meteorite data, it is known that 98% of meteorites contain nickel, which is not based on a fraction of a fraction but compared with iron and nickel.Professional researchers are needed to know the ratio.
Finally: Dean Liao and Professor Zhang reminded the majority of star friends that it is best to find some professional people to understand the collection of meteorites, and do not pursue the truth in the online world.
The meteorites identified by the Hunan Chinese Calendar Collection Appraisal Center strictly follow the international meteorite database and are legally responsible for the appraisal results.
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