Determine what are the main markers of mineral symbiotic assemblages

Mineral symbiotic assemblages are the assemblages of a number of symbiotic minerals that reflect a certain cause. For example, in diamond-bearing kimberlite, the combination of diamond, olivine, phlogopite, chrome diopside and a small amount of mafic chromite and pyrope garnet is a mineral symbiotic assemblage.

The emergence of certain mineral symbiotic assemblages depends on the geochemical properties of the elements and certain physical and chemical conditions (such as temperature, pressure, component concentration, pH value, EH value, etc.) in a certain geological process. Therefore, the study of the law of mineral symbiotic combination can guide the prospecting of useful minerals that may be found in some geological environments; It is also helpful to elucidate the laws of mineralization, determine the type of ore, infer the genesis of ore deposits, and study and identify minerals in symbiotic assemblages.

The structure of symbiotic ore is: symbiotic (upper and lower structure) and symbiotic (single structure) ore (left and right structure).

The structure of symbiotic ore is: co-missing chain bureau (upper and lower structure) and biotic (independent structure) ore (left and right structure). Pinyin is: gòngshēngkuàng. The phonetic pronunciation is:

What is the specific explanation of symbiotic mine, we will introduce it to you through the following aspects:

1. Explanation of terms [click here to view the details of the plan].

Several minerals born in the same deposit. For example, galena and sphalerite are symbiotic ores, pyrite, natural gold and quartz are also symbiotic ores.

2. Citations and Explanations.

Several minerals born in the same deposit. For example, galena and sphalerite are symbiotic ores, pyrite, natural gold and quartz are also symbiotic ores.

3. Chinese dictionary.

Several minerals that survive in the same deposit.

Fourth, the network explained.

Symbiotic ore refers to two or more minerals in the same mining area (deposit) of Furang, both of which meet their own separate grade requirements and reserve requirements, and each of them reaches the size of the deposit. The metallogenic elements in symbiotic ores tend to have similar geochemical properties, and the metallogenic geological conditions are similar, and are formed in a unified metallogenic process. For example, sedimentary jet-type lead-zinc deposits where both lead and zinc are independent deposits are symbiotic ores.

Idioms about symbiotic mines.

People and gods share the same anger, the deer and the car work together, the common branches, the common safety and danger, the common share, the common non-consultation, the country is coherent, the same joy, the same life and death, coexistence and death, and mutual help.

Words about symbiotic mines.

People and gods share the same anger, life and death together, common life, common life, common safety, common welfare, common joys and sorrows, common culture, common track, and common discussion, the country is harmony, mutual assistance, and common branches.

Sentence formation about symbiotic mine.

1. The application of chemical metallurgical technology to the chemical metallurgical separation of tungsten and tin refractory symbiotic ores, and the direct preparation of tungsten salt and tin salt products.

2. This is a symbiotic mine, and we can get multiple ores at once.

3. Bituminous uranium ore is the only primary uranium mineral in the ore, and its symbiotic minerals mainly include quartz, fluorite, hematite and pyrite.

4. Its industrial minerals include scheelite and molybdenum, and its symbiotic minerals are mainly metal sulfides.

5. In the Qingfeng fault zone in the Wudang Mountain area, the multi-stage deformation of the rocks was caused by the overthrust structure, and the corresponding symbiotic mineral assemblages were found.

In order to determine which minerals are formed at the same time in the mineral composition of metamorphic rocks, which can form a symbiotic combination of minerals, it is often necessary to complete through a series of work, and careful microscopic observation and analysis is one of the essential tasks. Under the microscope, the main criteria for identifying mineral symbiosis are:

1) The mineral phases of the symbiotic assemblage should be in contact with each other, as shown in Figure 7-2-1, the four minerals in the lamellae can be divided into two different mineral symbiotic assemblages: assemblage (1) a b c; Combination (2) b c d.

2) The mineral phases in the symbiotic assemblage are formed at the same time, and there is no metasomatism between each other, and if there is metasomatism, they do not belong to the same mineral assemblage.

Figure 7-2-1 provides a rough representation of two different mineral assemblages, assemblage (1)ab c and assemblage (2)b c d

According to Winkler, 1976).

3) In a mineral symbiotic assemblage, the chemical composition and phototic constant characteristics of similar minerals should be similar, and if there is a ring band, the chemical composition and phototic characteristics of at least the edge parts should be similar.

4) In high-grade metamorphic rocks, the self-shaped polymorphic mineral assemblages composed of granitic metamorphic structures are usually symbiotic mineral assemblages.

5) The symbiotic relationship between the socks and minerals should conform to the Gibbs law and the Goldsch Rangbmit mineral law, and the types of mineral phases generally do not exceed 5 or 6 kinds, and the content of the phase law can refer to the relevant textbooks.

The ore is made up of useful minerals and gangue minerals. Useful minerals refer to the metallic and non-metallic minerals that can be used in the ore; Gangue minerals refer to minerals that cannot be used or cannot be used in conjunction with useful minerals. The chemical and mineral composition of refractory materials essentially determines its properties.

Refractories with different chemical compositions, mineral compositions and their distribution structure characteristics exhibit different chemical properties and physical properties.

The morphology of minerals can be divided into two categories: the morphology of monomers and the morphology of aggregates.

1) Monomeric morphology of minerals.

single crystals of minerals, some of which grow in one direction, become columnar, needle-like, or fibrous; Some extend in both directions, becoming plate-like, flaky, or scaly; Some are of equal length in three directions, becoming equiaxed or granular.

2) Aggregate morphology of minerals.

The aggregate of mineral grains is called an aggregate. Mineral aggregates tend to have a certain habitual morphology. If the mineral monomer is elongated in one direction, its aggregate is often fibrous or hairy.

If the monomer is bidirectionally malleable, its aggregate is usually scaly. If the monomer is tridirectionally equilong, its aggregate is often granular (the naked eye can distinguish the particle boundary) or lumpy (when the naked eye cannot distinguish the particle boundary). The hard ones in the block-like aggregates are called dense blocks, and the loose ones are called upper-shaped.

In addition, there are some special forms of mineral aggregates, such as radial, bean-shaped, stalactite-like, etc.

Optical properties of minerals.

The optical properties of minerals refer to the absorption, reflection, refraction and other properties of minerals to natural light, mainly including the color, streaks, luster, transparency, etc., which are important signs for identifying minerals.

1) The color of minerals is the complementary color of minerals after absorbing a certain wavelength of color light in white light, which is the most intuitive optical property of minerals. Many minerals have a specific color and are important markers to identify them. Some minerals are named according to their color, such as pyrite, hematite and limonite, etc., according to the reason for the different reasons of the color, the color of the mineral can be divided into three kinds of self-colored minerals The inherent color of the mineral itself, which is determined by the chemical composition and internal structure of the object.

For the same mineral, the self-color is generally more fixed. Other color - this color has nothing to do with the internal structure and composition of the mineral itself, but is caused by foreign charged impurities, bubbles and other mechanical mixtures. False color - this color has nothing to do with the internal structure of the mineral itself, it is often caused by cracks inside the crystal, oxide film on the surface, etc.

2) The streaks of the mineral are the color of the mineral powder, that is, the color of the powder left by the mineral after rubbing on the streak plate (white unglazed porcelain plate). The streaks of the mineral eliminate the false color, weaken the other color, and are more stable than the color of the mineral particles, so they are more important for identification.

3) The luster of a mineral refers to the ability of the surface of the mineral to reflect visible light. The luster strength of minerals varies greatly, and the common ones are as follows: metallic luster, semi-metallic luster, grease luster and waxy luster.

A group of minerals formed in the same genesis and the same metallogenic stage are called symbiotic minerals with each other.

For example, common symbiotic minerals in peridotite include olivine, pyroxene, chromium spinel, etc.

If the formation time and cause of minerals are different, it is not symbiosis, but is called the association of minerals.