Yunnan Mine Tour (Heqing Beiya Gold Mine-1)

Beiya gold deposit is located in Beiya, Heqing County, Dali Prefecture, northwest Yunnan, about 62km away from Heqing County and 98km away from Dali City. Dali-Lijiang Highway and Dengchuan-Heqing Highway pass through the mining area, with sufficient water and electricity, and production mines have been built.

Driving route: Dali City → Heqing County Beiya, the total distance is about 98.0 kilometers

Starting point: Dali City

1. Start from the starting point due south. Drive 10 meters and turn right into Cangshan Road

2. Drive along Cangshan Road for 390 meters and turn right into Tai'an Road

3. Drive along Tai'an Road for 870 meters and see Tai'an Road No. 1 exit

4. Continue along Tai'an Road for 100 meters. At the 2nd exit, turn left into Carlsberg Avenue

5. Drive along Carlsberg Avenue for 290 meters and pass on the right of the Bolton Hotel, turn right into Renmin North Road

6. Drive along Renmin North Road for 13.9 kilometers, cross Taoxi Bridge for about 280 meters, and go straight into the Three Towers Tunnel

7 Drive along the Three Towers Tunnel for 430 meters and go straight to G214

8. Drive along G214 for 34.1 kilometers and turn left to enter the Dali Line

9. Drive along the Dali Line for 34.7 Kilometers, after passing Guanyingzhuang on the right for about 260 meters, head towards Beiya and turn right to enter the West Yellow Line

10. Drive along the West Yellow Line for 12.1 kilometers and reach the end point (on the right side of the road )

End point: Beiya

Beiya has superior mineralization conditions and good prospecting prospects. It is an important deposit that can significantly increase reserves. The type of deposit and the geological environment of mineralization are in The western Yunnan region is representative and has always been concerned by geological exploration departments and geologists. In recent years, the mine has passed several phases of geological exploration by the Yunnan Provincial Geological and Mineral Resources Co., Ltd., and the gold resource reserves have reached a very large scale. The development and production efficiency is good, and it has become a world-class giant gold deposit. In addition to gold, the Beiya mining area has also proven silver reserves of over 10,000 tons, making it a world-class giant deposit.

It is midsummer in June, the summer season has just begun, and the dog days have entered. When Chuxiong, Yunnan celebrated the arrival of the Torch Festival of the Yi people, we came to Beiya Village, Heqing County, and pulled the fog to look at the clouds to admire the scenery of Jinshan Mountain. The plan is to start from Beiya Village, take the car on the main road, hike on the small road, and climb mountains. All the way through the millet field to Wantong Mountain to see the open-pit mining site; then along the iron ore pond, Mast Slope, to Bijia Mountain to see the mineral veins; and then from the pot cover Visit the Quaternary residual slope gold deposits at Shanshan, Jingouba and Hongnitang, and finally return to Beiya Village.

Wearing morning dew, we walk on the red soil sandwiched with stone country roads in Beiya Village, climb on the slopes of Xiaomi Field and Wantong Mountain Gold Mining Area, and are submerged in the phantom-like morning mist. Our group lost a bit of the frenzy of running wild in the mines of Yunnan, and added a bit of audio-visual exploration and decryption. Birds chirping, insects chirping, butterflies dancing, bees flying, grass growing and trees moving, gentle wind, flowers blooming, refreshing air, dew drops, red soil, everything is so natural, so fresh, so refreshing, so harmonious. As soon as I arrived at the mine, the mountain was cut open, and one ore truck was pulling one after another, ore dressing plant, cyanide treatment plant, gold mine heap leaching... I couldn't help but sigh again: This is a green mountain with scars everywhere, and a world stained with gold. This is a magical world in the world, this is a golden world that is uniquely blessed by nature, and this is a fascinating picture of red earth and mountains of gold and silver. This is a leaching site that can turn stone into gold...

Entering the Wantongshan mining section, it is 1.8 kilometers long from north to south, 1.3 kilometers wide from east to west, and covers an area of ??2.34 square kilometers.

The Wandongshan mining section is located at the intersection of the north-south Qiping-Beiya structure-porphyry mineralization zone and the east-west structural belt and northwest structure, which is a mineralized structure-magma network. The structural nodes of the structure. The porphyry body is a compound rock body. The quartz syenite porphyry is a product of the syn-collision diagenetic tectonic environment and has the characteristics of granite. The quartz monzonite porphyry is a product of the late orogenic-late orogenic diagenetic tectonic environment and has a medium to high degree of differentiation. , Biotite syenite porphyry and lamprophyre are developed. The rock mass is generally produced in a north-south vein pattern, with skarnization, magnetite mineralization, and iron-manganese mineralization at the edges of the rock mass. The later structural composite superposition is obvious.

This mineral section has the characteristics of multi-stage structure-magma-mineralization superposition. The contact fault structural zone in the eastern part of the main rock body of the Wantongshan ore section is developed, forming a vein-fissure-mineralized zone with strong gold mineralization accompanied by porphyry veins, lamprophyre veins and limonite veins.

The primary gold mineralization in this ore section is strong and extensive, and has a certain degree of denudation. The Tertiary paleo-weathering crust is developed and well preserved, so "laterite type" gold mineralization is developed. The Wulipai area has already produced 10,000-ton red clay-type gold mines. The first iron-gold deposit in the porphyry western contact zone that has been constructed continues to extend westward and deep. The minimum thickness of the ore body is 5.74m, and the gold is 4.42 g/ton; the thicker section is 50 meters thick, and the gold is 1-3.2 g/ton. ; The ore body in the contact zone on the second porphyry is 13.24 meters thick and contains 1.04 g/ton of gold. The upper limestone on the west side is a short-axis anticline, which is caused by the uplift of the underlying porphyry. There are rich ore bodies in contact with the uplift. Wantong Mountain is the best gold mining area currently explored in the Beiya mining area.

After seeing the Wantong Mountain Mining Area, we followed the Iron Ore Pond and Mast Slope to the Bijiashan Gold Mine. Walking to the corner of the iron ore pond, accompanied by the sound of a gust of wind blowing the shrubs, a folk song came: "The pomegranate flowers are blooming red again, and the close friends meet again; although they were separated not long ago, it seems like nine winters have passed. ". Immediately afterwards, a female voice sang: "In March, the peach blossoms are all red, and the sight of my brother is like a winter; I miss you with all my heart, just like looking forward to the cool breeze in the dog days." Looking around, a pair of young Bai people were sitting on a stone, leaning against each other and singing love songs. There was a two-person motorcycle parked next to them. We all felt that this situation was unnecessary, so we returned after finding out what we were interested in, and found another way to climb mountains for sightseeing and take photos. We even picked up a beautiful piece of gold ore at a fork in the road.

After crossing mountains and ridges, we arrived at Beacon Mountain.

The Bijiashan mining section is 1.7 kilometers long from north to south, 0.4 kilometers wide from east to west, and covers an area of ??0.68 square kilometers. It is located at the intersection of the Qiping-Beiya north-south tectonic porphyry mineralization zone and the Nandaping-Yiganpo east-west tectonic porphyry mineralization zone, and is the northeast-trending Wopu-Houshan syenite porphyry. With overlapping parts. This site is located in a strong north-south linear structural belt on remote sensing images. There are two north-south structural stress-induced zones (zones) in this area. The stress-induced zone (zones) is roughly distributed along the east and west sides of the north-south mountain of Bijia Mountain and Mastang Slope. On the surface, multiple faults corresponding to the faults on the west slope of Bijia Mountain and the east slope of Bijia Mountain form porphyry veins - limonite vein mineralization zones. The western zone extends northward and is covered by the Quaternary System, and the eastern zone extends northward toward the Mast Slope. The porphyry veins exposed near the surface in this part are thin and sparse, which is equivalent to the fracture-crushing transition zone of multiple sets of fracture-filled veins in Beiya porphyry. There are alteration phenomena such as skarnization, limonization, and discoloration at the edges of the veins, and the superposition of faults is obvious in the later period. Gold industrial mineralization has been formed in veins and fractures.

The ore body exposed in the tunnel has three layers, with a thickness of 13.5m and a gold content of 2.62-9.16 g/ton. The ore body continues to extend deep with the porphyry. Multiple porphyries are developed in the nearly north-south fault and are distributed in diagonal rows. Shallow limonite veins and iron-gold veins are developed, with shallow erosion and the presence of breccia. There are porphyry bodies and iron-gold ore bodies at a depth of 100 to 150 meters. The section shows that the stratigraphy and porphyry occur from east to west, and the occurrence changes from thick to gentle. There are fractures and porphyry bodies at the turning points of the stratigraphy. It is inferred that there are rich ore bodies in the depths. There should be two hidden porphyry bodies on the east side of the ore body, and the gold vein in the west is 1,700 meters long and 400 meters wide. The Bijiashan gold mine has favorable mineralization conditions and has the most realistic conditions for increasing gold reserves.

It was approaching noon, the sky was high and the clouds were clear, the sun was shining brightly, and my underwear was soaked with sweat. We walked out of Bijia Mountain and came to the place known as Guogai Mountain. It suddenly became clear at the end of the mountain road, and we finally saw a few families. A small pond in front of the village reflected the whole village. There were several big trees behind the village, and a stream flowed to the left of the village. Next to the gurgling stream, there are a few sparse vegetable gardens on the right side of the village. Mud roads lead to the doors of every house, firewood barks loudly, and smoke fills the air. This lunch consisted of potato stuffed rice, boiled vegetables dipped in water, and a bowl of old bacon. It was a real "mountain delicacy" feast. Everyone said that they had not eaten such a delicious meal in many years.