Molybdenum tungsten lead-zinc ore field in Luanchuan, Henan Province is located at the intersection of the southern edge of the North China continent block and the orogenic belt of Qinling tungsten, lead-zinc orevolution zone. It is an important molybdenum tungsten, lead-zinc polymetallic mineralization area in China. It is distributed in Sandaozhuang, Nannihu, Shangfanggou and other super-large molybdenum and tungsten deposits.
Luanchuan County Landform
Since the implementation of a major geological survey in 1999, more than ten lead, zinc and silver polymetallic veins have been found, and hundreds of ore-bearing fault zones have been found.
regional molybdenum polymetallic mineral geological map
The lower part of this investigation area is a large group of magma rocks in Yanshan period. Porphyries penetrate along the early near-east-east and north-south faults, forming rock groups and large-scale mineralization at the intersection, and forming single small rock beads and small-scale mineralization outside the intersection. The mineralization series is divided into porphyry type, skarn type and hydrothermal filling and interpretation type deposits. The three types of ore deposits have obvious spatial division and similar formation time.
ore-containing silicification alteration zone
Inspection area Lead-zinc ore mining rights project has three mining areas. This time, the focus is on conducting key investigations on mining areas 1 and 2.
steep dip small mining area
mining area is the first mining area of the mine, and there is a pit opening of 1404M of the main inclined shaft. After the resumption of work of this wellhead, it is necessary to design and construct a second-level ramp (-26°) of 176m to the elevation of 1300M of the 3# ore body controlled by the original main wellhead. The No. 3 ore body moves 50°, and the inclination is 55°. The thickness of the ore body is about 0.6-1.5m. It is reported that the comprehensive grade of lead and zinc in the upper part of the ore body is about 8%, the length of the ore body is greater than 60m at the elevation of 1300M, and the comprehensive grade of lead and zinc is about 12%.
structure crack ore control
404M first-level ramp control
404M main well first mining area is 1375M. Now one small ore mining site is controlled, the ore grade is produced, the comprehensive grade of lead and zinc is about 7%, the Ag grade is about 33g/t, and the length of the control ore body is greater than 100m.
Breccia structure
mining area 1 mining area controls the 1# ore body by a vertical shaft and main inclined shaft. The ore body produces 50° in a production direction, inclination toward the southeast, with an inclination angle of 33°. The ore body is lenticular-fine vein-like output, strictly controlled by faults, stable production, the ore body thickness is about 0.5-2m, and can reach 3 meters locally.
goaf scale
has been controlled for mining, with a depth of 1170m, the length of the ore body is greater than 100m, the width of the ore body is about 1-2m, the comprehensive grade of the hand-selected rich ore lead-zinc is about 25-30%, and the Ag grade is about 300-500g/t. The ballast sample test grade of the existing ore (excluding hand-selected rich ore) at the mining site is 10-18%, and the Ag grade is about 152-236g/t.
hand-selected ore
Most of the existing ore bodies in this project have been empty, but the continuity of the deep ore bodies is ideal, and the grade of ore is higher, and the value of ton of ore is considerable. After on-site inspection, combined with the existing mining project, the mine exploration and mining were combined, and the deep mine exploration potential was found.
What kind of ore is this?
Finally, I will share with you a picture. Do you know what ore is in the picture above? If you have any friends who can see it, please write down your answer in the message area.
