Resources and Environment in Tianba Town
The geological structure in the territory is complex, the landform features are remarkable, the extension line of mountains is long, the soil is diverse and the land is fertile. The geological structure in the east is more complicated than that in the west. Faults and folds are developed, and "mountain" structure appears, and folds are the best. Various geological structures are mixed together to form various structural systems. The lower Permian Qixia Formation and Maokou Formation are mainly limestone and dolomitic limestone with a thickness of 337 ~ 760 meters. Upper Permian Emeishan basalt formation, almond-shaped or porphyritic basalt mixed with multiple layers of yellow-green, purple-red tuff, 387 meters thick; Xuanwei Formation of Upper Permian. The lithology is gray, grayish yellow siltstone, sandy mudstone and sandstone, with many coal seams and a thickness of 22 ~ 323m. Feixianguan Formation of Lower Triassic is purple, purplish red and grayish purple mudstone, sandstone, shale and silty mudstone mixed with grayish green, yellow, gray, feldspar, mudstone siltstone and silty mudstone, with a thickness of 28-669m. Jurassic distributed in Tianba and other places, and developed into erosion valleys along syncline axis. Lithology is purplish red mudstone and siltstone deposited on the mainland, mixed with grayish green and yellow miscellaneous sandstone and siltstone, with a thickness of 68 ~ 1 145m. Quaternary lithology is red clay, and the bottom is yellowish brown clay mixed with limestone and flint breccia, with a thickness of 0 ~ 52 meters. Mabai River, Weizhong River, Kedu River, Mudong River and Qingshui River in the upper reaches of Beipanjiang River in the east, Niulan River and small watershed valleys in the west, including Tianba River, are V-shaped from the bottom of the valley to the mountain because of their deep ditches. The relative height difference is 760 ~ 1380m. There are three small dams in the town: Tianba, Shiba Inu and Xinmin, surrounded by mountains. The mountain range belongs to the Lieshan system in the east of Wumeng. Aozhuojialiangzi in the west is divided into two branches: one is Liangzi in Liangshan and Longshu, which runs from southwest to northeast and is about 20 kilometers long; The other branch is about 20 kilometers long from southwest to northeast. In the east is a mountain range extending from Haidai to the north, about 25 kilometers long. Affected by topography and climate, about 50% of the soil in the town is red soil, mainly including red soil, sheep liver soil, thin red soil, brown red soil and purple soil, which is suitable for planting a variety of crops.
The territory is rich in mineral resources, including coal, iron, copper, kaolin, limestone and clay, of which coal and iron have large reserves and high grade. The proven coal reserves are 40 million tons, there are large provincial state-owned Tianba coal mine, and there are 17 certified mines in towns and villages, which have promoted the development of local economy. Yangmeishan iron mine and kaolin in Longjiacun have large reserves, and there are currently two mining plants.
The living water system belongs to Beipanjiang River system, with three big rivers. The upper reaches of Gexiang River are Panlong River, which flows through Xinmin, Lian Meng and Shitang from northwest to northeast, with a total length of about 30 kilometers. Qingshui River joins Gexiang River in Panxian Special Zone from south to north via Lajia, Longjia, Xinfa and Shitang, with a territory of about 22 kilometers. The upper reaches of Cinar River are Haidai Yangchang River, which flows into Gexiang River through Zhenxi, with a territory of about 10 km. The average annual rainfall in the town is 1 100 ml, with an average annual total of 654.38+200 million cubic meters, of which the runoff is 1 10,000 cubic meters per hour, and the average groundwater resource is 2 million cubic meters.
The whole town has forestland area of 2 1 1075. 13 mu, of which the area of economic forest fruit is 1545 mu, including dried fruits such as citrus, yellow fruit, apple, chestnut and walnut, with a wide variety of plants and a vegetation coverage rate of 58.6%. There are dozens of wild animals and beasts such as rock sheep, deer, rabbits and pheasants.