The geotectonic division in this area belongs to the Yangtze platform, extending from northern Zhejiang to the east through southern Jiangsu, southern Anhui and northwestern Jiangxi, crossing Dongting Lake to Fanjingshan in southeastern Hubei via Xuefeng Mountain, and then to northern Guangxi and Yunnan. The Yangtze platform is relatively stable, and has experienced the magmatic tectonic activities such as Xuefeng, Lvliang, Caledonian, Hercynian, Indosinian and Yanshan. Large uplift, large sag and deep fault are developed, which have obvious ore-controlling effect of multi-stage activity superposition. This area is rich in tungsten resources, and its deposit type is second only to that of South China, making it the second largest tungsten-rich area in China. In view of the vast area and different mineralization degrees, it is divided into the following four secondary accumulation zones.

1. west Zhejiang-south Anhui accumulation zone

This belt mainly includes the western Zhejiang-southern Anhui platform fold belt. The ore-bearing strata include sandstone shale and slate of Sinian Tang Zhi Formation, sandstone and siltstone of Leigong 'ao Formation, thin limestone and manganese-bearing dolomite of Lantian Formation, sandstone and mudstone of Xiuning Formation, argillaceous limestone and marble of CAMBRIAN of Middle Ordovician. The Yanshanian magmatism was intense, and some intermediate-acid granites closely related to tungsten mineralization were formed. The types of tungsten deposits mainly include skarn scheelite deposits occurring between ancient metamorphic rocks, hydrothermal scheelite deposits and skarn scheelite deposits related to acid granite. Skarn deposits between old metamorphic rocks are mainly developed in Jixi and Qingyang in southern Anhui, and tungsten deposits in Interstate Gorge, Qiaochuan, Baizhangya and Gaojiabang are of medium scale. The ore body occurs in Lantian Formation of Sinian system and occurs along manganese-bearing dolomite and dolomitic limestone. The ore body is layered, and the ore minerals include scheelite, pyrrhotite, chalcopyrite and pyrite. Gangue minerals include diopside, garnet and wollastonite. Lantian Formation generally has a high tungsten abundance [w (w) is 47× 10-6 ~ 89× 10-6], which is the source bed of tungsten. In addition to Gaojiabang tungsten mine, Yanshanian intrusions are exposed near the ore body, with granodiorite under it, granodiorite in Qiaochuan and biotite granite in Baizhangya. The above magmatic activities reformed the metallogenic system. The wolframite-quartz-vein wolframite related to Yanshanian biotite granite mostly occurs in the inner and outer contact zone between small rock strains around Qianmutian granite bodies in Lin 'an and Jixi and sandstone, siltstone and slate of Sinian Tang Zhi Formation and Leigong 'ao Formation. Ore minerals are mainly wolframite, molybdenite, beryl and chalcopyrite, and gangue minerals are mainly quartz, feldspar, muscovite and fluorite. Such deposits include Qianmu field, Xiaseling and Gu Men pit. The deposit is small in scale, mostly small and medium-sized, but high in grade. Generally, the WO3 content is above 1.5%, which has high economic value. Skarn-type deposits mostly occur in the contact zone between Yanshanian granite and CAMBRIAN argillaceous limestone and Middle Ordovician marble. Generally, this kind of deposits are of low grade, coexisting with copper, iron and molybdenum, with small scale and little economic significance, such as Jixi Xiaoyao Tungsten-Molybdenum-Copper Mine and Chun 'an Tongshan Iron Mine.

2. Jiangnan Tailong Cluster

The belt runs through the north, south and Xuefeng mountain areas of western Hunan in the east-west direction, and is mainly composed of the folded basement of Shuangqiao Mountain Group, Lengjiaxi Group and Banxi Group in Yuanguyu. The caprock is Sinian-Silurian, with Upper Paleozoic in between, which is a set of extremely thick mudstone and clastic rocks, containing a lot of volcanic materials. Granite has Jinning period, Hercynian period and Yanshan period, and has the characteristics of multiple cycles. The abundance of tungsten, antimony and gold in Yuanguyu, western Hunan is high, and the abundance of tungsten is 2-8 times that of the earth's crust. The most famous type of deposit is the W-Sb-Au deposit in Taoyuan, western Hunan, which occurs in the cracks between the plates of the shallow metamorphic rocks of Madiyi Formation in Lengjiaxi Group, Grain Rain (Figure 5-23). There is Xianglushan layered skarn scheelite deposit in northern Jiangxi province on the edge of ancient land. Mineralization occurs near the intrusive body, and the relationship between ore body and surrounding rock is gradual. Tungsten deposits related to acid granite intrusions in Jiuling-Zhanggongshan area, Jiangxi Province include veinlet belt type (Dahutang) and chronological vein type (Suoyidong), as well as Yangchuling porphyry type tungsten deposits occurring in epithermal intrusions monzoporphyry and granodiorite porphyry. Dongxiang LAM Raymond copper ore body occurs directly in Carboniferous pyroclastic rocks and siliceous rocks, and weathered tungsten ore body occurs in copper ore body. The ore body and strata are integrated into one, which is layered and quasi-layered. Tungsten and hematite coexist in adsorption and microcrystalline state. In the later stage, scheelite-wolframite fine mesh veins were superimposed to form tungsten ore bodies. Although the scale of tungsten is large, it is still difficult to use because of the difficulty in mineral processing.

3. Lower Yangtze accumulation zone

Tungsten deposits in the lower Yangtze enrichment zone are mainly distributed in Daye sag. Daye depression is an early Paleozoic depression belt, with strong Yanshan movement cycle, complex basement structure and large-scale magmatic activity, which led to extensive mineralization of iron, copper, tungsten and molybdenum. This belt is mainly skarn scheelite deposit, and tungsten is mostly associated with copper and molybdenum. Mineralization is related to Yanshanian granodiorite, quartz diorite and diorite porphyrite. The ore body occurs in the contact zone between rock mass and surrounding rock, and the ore-forming surrounding rock is limestone of Qixia Formation of Lower Permian and Daye Formation of Middle and Lower Triassic. The ore body is layered and lenticular. Ore minerals include scheelite, molybdenite, chalcopyrite, pyrite and magnetite. Gangue minerals include garnet, diopside, calcite, yingshi, etc. The deposits are mainly distributed in Yangxin Daye area, including Fujiashan tungsten-copper-molybdenum deposit, Longjiao Mountain copper-molybdenum-tungsten deposit, Ruanjiawan copper-tungsten-molybdenum deposit, Malingshan scheelite deposit and Bay tungsten-molybdenum deposit. Most of the deposits are small and medium-sized and contain elements such as copper and molybdenum, which have high economic value. In 1980s, Jianbi tungsten-molybdenum deposit was also discovered in Ningzhen mountain range in the east of the Lower Yangtze. The ore body occurs in Yanshanian adamellite, and the ore has disseminated network vein structure. The main ore minerals are molybdenite, scheelite, chalcopyrite and pyrite. Gangue minerals include syenite, potash feldspar, garnet and biotite, and the deposit is small in scale and belongs to granite tungsten deposit.

4. Kang-Dian axis gathering area

Kang-Dian axis is a north-south tectonic magmatic active belt with narrow north and wide south, which has the characteristics of multi-cycle and multi-stage mineralization. The main mineralization in this zone is iron and copper, and tungsten ore is less distributed, only distributed in Huili, Kangding, Shiping and Anning in Sichuan, and most of them are associated with tin. Tungsten mineralization in this area occurred in Proterozoic, Indosinian and Yanshan periods, with the Proterozoic being the most. The types of deposits are skarn type, chronological pulse type and stratabound sedimentary metamorphic transformation type. The medium-sized skarn tungsten deposit is Jiudaowan tungsten deposit in Anning, Yunnan. Mineralization is related to Jinning adamellite, and the ore body occurs in the outer contact zone between rock mass and Mesoproterozoic Kunyang Group calcareous slate. The ore body is layered, and the main metal minerals are scheelite, cassiterite and pyrite. Skarn-type deposits related to Yanshanian mica granite include Wulaxi tungsten mine in Jiulong, and the ore body occurs in the contact zone between granite body and Permian limestone, but the scale of the deposit is very small. The hydrothermal chronological vein type Kangding Hede tin-tungsten deposit is related to Indosinian porphyry biotite granite, and the chronological vein occurs in the inner and outer contact zone of granite. The surrounding rock of the outer contact zone is Triassic Xikang Group quartz schist, and the ore minerals are cassiterite, wolframite, scheelite and chalcopyrite. Tungsten deposits are very small. Shiping Longtan tungsten mine is related to pre-Sinian diorite. The ore body is located in the contact zone between diorite and pre-Sinian metamorphic sand shale. Although tungsten is medium in size, it is difficult to be selected because it is associated with limonite, so it is difficult to be used in the near future. This zone is controlled by the interlayer fracture zone of metamorphic sandstone, marble and sericite schist of Huili Group before Sinian. The main ore minerals are scheelite, cassiterite, chalcopyrite, galena and magnetite, which are generally skarnized. The deposit is small in scale and has no economic significance. Such as Heshan Shenxi Tungsten Mine, Shunhe Liu Jia Tungsten Copper Mine and Lujiashan Scheelite Mine in Huilixia Village.