Application of geological plant method in the 汞(mercury) deposit of the abused wood plant in southwestern Guizhou
Abstract: Based on the geological characteristics of Southwest Guizhou Lanmuchang thallium (mercury) deposit, based on the combination of its distribution characteristics and mineralization related to research on plants to Jin dynasty hair moss (Polytrichum Commune Hedw) be an example Geological plant method mapping. The observation points were arranged at 120×60 m, the distribution density was counted, and the density contour map was compiled. The distribution of density contours and the distribution of different density contours and NE-trending fault zones and alteration zones were discussed. The relationship between mineralization zones and mineralization centers, and pointed out the significance of its prospecting. According to the big blonde, the symbiosis of Dicranopteris dichotoma (Thunb) Bernb, Lyonia Sp, Pteris Vittata L, etc., combined with the ash analysis data to calculate the ore-forming element enrichment coefficient, analyzed This characteristic plant combination serves to find the indiscriminate bismuth (mercury) deposit.
Key words: geological plant method; strontium (mercury) deposit; abused wood plant; southwestern Guizhou CLC number: P618.88 08 Document code: A
The geological plant method is a method for prospecting based on the relationship between specific plant species and plant combinations and certain geological conditions (rock, wall rock alteration, structure, specific deposits, etc.). Since two-thirds of the earth's land is suitable for plant growth, and early geological planting methods were only observed with the naked eye, they have long been used in geological and hydrogeological surveys and prospecting. The literature dates back to the 19th century. Mid-early and early 20th century, even earlier. It is known that modern methods in foreign countries have achieved certain results in the search for metal minerals such as Cr, Co, Ni, Cu, Pb, Zn, Mo, Au, and non-metallic minerals such as diamonds and certain gemstones , especially in metal minerals. The use of ore is more widely used and the effect is more significant. The use of plants, especially characteristic plants, for prospecting has received increasing attention. The plant prospecting method includes the geological plant method and the plant ash method, and there are many foreign application examples. Although there were one or two monographs on local botany in the former Soviet Union and Western Europe in the middle of the 20th century, there are still very few people who systematically conduct research in this area.
This method has been used in China since the 1950s. For example, Xie Xuejin et al. (1952) used Haizhou Xiangxi ( copper grass) to find copper mines in the middle and lower reaches of the Yangtze River. Zhou Dezhong and Chen Daidan (1963) used large leaf drunk fish. Grass in Guizhou and Guangxi to find mercury mines, have received good results. This paper will discuss some of the preliminary results obtained by the authors in recent years in the prospecting experiments using characteristic plants and plant combinations in the 木 (mercury) deposits of the Baimuchang plant in southwestern Guizhou.
1 Geological profile of the sputum (mercury) deposit in the Baimuchang (below)
The Baimuchang (mercury) deposit is located in the transition zone between the southwestern margin of the Yangtze River and the Youjiang orogenic belt, and the composite part of the east-west structure and the northeastward structure of the southern section of the Zhaojiaping anticline.
The ore-bearing strata in the mining area are mainly Longtan Formation (P2l) and Changxing Formation (P2c), followed by the first member of the Lower Triassic Yelang Formation (T2y1). The ore-bearing surrounding rocks are limestone, clayey sandstone and argillaceous limestone. Sandy clay rock, clay shale , brittle and plastic rock alternately form a layer, forming a complex ore deposit with obvious multi-layer mineralization.
The density map of the big blonde è—“ (mercury) deposit in the abused wood factory [next]
The main structure of the mining area is the nose-shaped anticline of the inferior plant of NE 40°-60°, which is 720 m long and 350 m wide, which controls the distribution range of the deposit. The F1-F7 fault group of NE 40°-60° has a dip angle of 65°-85°. It is known that ore bodies and ore bodies are produced in the fracture-altering zone between F1-F7, and are affected by stratum lithology and structure. The dual control, which spreads roughly along the layer, sloping vertically to the southwest, slightly undulating, and is layered and lenticular. It is lenticular or saddle in the lateral direction. It is generally 60-240 m long, 40-80 m wide, 120 m wide, 2-5 m thick, and 17 m thick. The ore body consists of several small ore bodies. The ore body is prolific in the inter-layer fracture zone, the deflection of the fault side, the fault bend and intersection, the slope of the fault zone and the rock slope are gradually changed. It is mostly strip-shaped, sac-like, beaded, etc., generally 2-10 m long and 2-4 m wide. There is a rich ore body in the upper middle part of the Changxing Formation between the VIII-VIII exploration line profile and Fb. According to the mining data, the rich ore body is 10-17 m long and 4-6 m wide.
Surrounding alteration mineralization yellow iron silicide, barite, kaolinite and the like.
The distribution direction and distribution range of the surrounding rock alteration zone, mineralization zone and NE-trending fault zone (F1-F7) are generally consistent, and the stronger the tectonic and alteration effects, the stronger the mineralization, the mineralization center and the strong structure. - The center of the alteration zone is basically consistent.
In 1957-60, the Zhangmuchang was discovered as a large-scale mercury deposit by the southwestern Yunnan team, and the average content of mercury ore contained 0.011%, and the associated component reserves were calculated. After the author's work since 1986, the independent rich ore body was discovered, and its characteristics were called the indiscriminate é“Š (mercury) deposit. In recent years, the authors point out that the ore-forming elements Tl and Au in this type of deposit are positively correlated with the gold content of the Yangjiawan antimony deposit.
2 Main plant characteristics and plant combination in the mining area In addition to the artificially planted cedar forests in the northeast and southwest corners of the mining area, most of the wild plants in the area are mainly developed with large blondes, awns, valerian, drunkards, and yellow flowers. Herbaceous plants such as Shisong and woody plants such as South Candle and Alfalfa have their morphological characteristics and distribution status in the following table.
The field observations of the author for many years show that the plants listed in the table below form a characteristic plant combination of big blonde, awning, south candle and scorpion, sedge, drunkard, yellow grass and stone pine. The general feature of the distribution is that the most intense mineralization center in the middle part of the mining area has the strongest growth in the combination. Although the concentration to the northeast is slightly reduced, it is still relatively developed, while the southwestern part is more developed than the northeast. In order to be sparse, in addition to the large density of the above-mentioned plants, the other plants such as mango, south candle, and scorpion tend to be sparse, and it is difficult to obtain sufficient samples in the section. In order to further clarify the relationship between this plant combination and the tectonic-alteration-mineralization zone, a detailed description of the planting of the plants was carried out, and the results were discussed.
Main plant characteristics and distribution of the 汞(mercury) deposit in the Baimuchang | ||||
Serial number | Name | Morphological characteristics | learn  name | Distribution and symbiosis |
1 | Big blonde | Needle-like leaves, herbaceous plants, often grow into green velvety grass. | Polytrichum commune Hedw. | The whole area is distributed. The known alteration-mineralization zone and the northeast corner of the mining area are dense, and the edge of the mining area is gradually thinning. The symbiotic plants are mainly Mang, Nancan, and 榔榆, followed by yarrow, stone pine and yellow. Flowers, drunken fish. |
2 | Mang | The plexus produces a piece of fern for the white family. | Dicranopteris dichotoma (Thunb.) Berh | It is mainly distributed in the known alteration-mineralization zone and the northeast corner of Figure 1. The symbiotic plants are mainly large blonde, southern candle and dragonfly, followed by stone pine, barnyardgrass, yellow flower grass and drunkard. |
3 | Valerian | Chang Congsheng, Pteridaceae fern. | Pteris Vittata L. | It is mainly distributed in the known alteration-mineralization zone and in the northeast corner of Figure 1. It is symbiotic with Mang, South Candle, Big Blonde, Scorpion, Stone Pine, and Yellow Flower. |
4 | South candle | Azalea shrubs. | Lyonia Sp. | It is mainly distributed in the alteration-mineralization zone in the central part of the mining area. The symbiotic plants are mainly Mang, large blonde, and scorpion; followed by valerian and yellow flowers. |
5 | 榔榆 | 50-200 cm high, eucalyptus woody, with oval leaves and serrated leaves | Ulmus parvifolia Jacq | It is mainly distributed in the alteration-mineralization zone in the central part of the mining area. It is symbiotic with Mang, South Candle, Big Blonde, and Valerian. |
6 | Buddle grass | Herbs perennial are shrubby, poisonous stems and leaves, and can be drunk. | Buddleia Davidi Franch | The sporadic distribution in the mining area is symbiotic with the big blonde, the mang, the sedge, the south candle and the dragonfly. |
7 | Yellow flower | Herbs, yellow flowers, commonly known as gluten. | Gnaphalium affine Ddon | The whole area is distributed, and the alteration-mineralization zone is dense. |
8 | Shi Song | The needle grows directly on the stem, and the stem is often curled and squatted on the ground, often growing in clusters. | Lycopodium Clavatum L | It is distributed in the same way as awnings and valerian, and is closely symbiotic with it. |
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