Mineralization and prospecting prospect in Anhui and Jiangxi areas

He Jurui Wang Aiguo Zeng Yongrui Xingjian

(Nanjing Institute of Geology and Mineral Resources, Nanjing 2 100 16)

There are four major metallogenic systems in Anhui and Jiangxi provinces, namely, Mesoproterozoic submarine volcanic jet metallogenic system, Neoproterozoic submarine hydrothermal sedimentary metallogenic system, Late Paleozoic hydrothermal sedimentary (post-superimposed) metallogenic system and Mesozoic (Cenozoic) volcanic-intrusive magmatic metallogenic system. In recent years, we have made a batch of latest prospecting achievements and expanded 9 important metallogenic belts. The comprehensive information of geophysical and geochemical exploration shows that 10 prospecting area can be considered as the key area for the next round of mineral exploration.

Keywords: Anhui and Jiangxi; Metallogenic system; Prospecting prospect area

1 regional mineralization

1. 1 tectonic framework

The Yangtze Plate, Cathaysian Plate and the Qin-Hangzhou Junction Zone in Anhui-Jiangxi Region have been covered twice at the end of Proterozoic (1 .900 million ~1.700 million years) and at the end of Mesoproterozoic (1100 million years), forming the Rodinia supercontinent [1. Jinning period, the stage of continental nuclear cracking-proliferation to the stage of polymerization orogeny-final formation of continental block; Caledonian movement entered the development stage of unified south China plate; Variscan-Indosinian fold orogeny; During Yanshan-Himalayan period, the block was activated, the intracontinental basin was formed, and the crust was thinned, which led to a large number of volcanic eruptions, granite intrusion and large-scale mineralization in eastern China.

1.2 4 metallogenic system

There are four regional metallogenic systems in Anhui and Jiangxi provinces [3 ~ 5].

(1) Mesoproterozoic submarine volcanic eruption metallogenic system-Tieshajie massive sulfide copper metallogenic system.

The rocks that constitute the metallogenic system are produced in Greenville cycle and are the products of different environments, mainly island arc environment. The rock types are turbidite, tuff, basic volcanic rocks and a small amount of acidic volcanic rocks, accompanied by interlayer and lens of jasper, barite and carbonate rocks. Mineralization is dominated by layered or layered metal sulfide deposits or constitutes the source bed. The main mineral is copper-gold mine, followed by lead-zinc-nickel mine.

Four Mesoproterozoic marine volcanic belts have been identified in this area: Wanzai-Yifeng, Tiesha Street-Wuwang, Dexing-Lingnan and Huangtuling-Shuizhukeng.

(2) The Neoproterozoic seafloor hydrothermal sedimentary metallogenic system-the Zhang-18 stratabound (superimposed) Pb-Zn (Sn) metallogenic system.

Neoproterozoic includes Qingbaikou, Nanhua and Sinian. The local names of Qingbaikou Formation in this area are Jintan Formation or Dengshan Formation, Likou Formation or Luokedong Formation, Shangshi Formation and Wanyuan Formation Qbwy. After the Qingbaikou period, the crust turned into a relatively stable denudation and littoral marine sedimentary environment, forming a large-scale stable caprock, that is, a set of sandstone-moraine-carbonate rocks in South China. Due to local volcanism, sedimentary differentiation and geothermal flow, ore-forming elements are enriched in some water basins, and metal sulfide deposits are formed locally. Such as Duyuyinkeng lead-zinc mine, Zhangshiba-Zengjialong lead-zinc-tin mine in Pengshan, De 'an, Pengze Guoqiao copper-silver mine, Xiuning-Ningguo tungsten-lead-zinc mine and other areas.

(3) Late Paleozoic hydrothermal sedimentary (post-superimposed) metallogenic system-Yongping-type (Xinqiao, Wushan and Chengmenshan) copper-sulfur stratabound superimposed transformation metallogenic system [6 ~ 8].

The ore-bearing strata are mainly clastic rocks and carbonate rocks of Carboniferous volcanic rocks, and sometimes Permian and Triassic. The ore-controlling structure is a regional fault, involving ordinary magmatic hydrothermal solution and mantle thermal fluid. The main body of the deposit is layered, and some of it is vein-shaped and capsule-shaped under the influence of faults, which constitutes an important part of the Yangtze-type "trinity" metallogenic assemblage summarized by predecessors. Tongling has Xinqiao-type and Yongping-type copper-tungsten-sulfur-iron-lead-zinc deposits (large-scale), Dongxiang LAM Raymond stratabound copper-iron deposit (medium-scale), Lehua manganese deposit (large-scale) and Wushan-Chengmenshan layered copper-bearing sulfide deposit.

(4) Mesozoic (Cenozoic) volcanic-intrusive magmatic metallogenic system-Tongchang porphyry copper deposit, Lengshuikeng volcanic Pb-Zn-Ag deposit, Maopengdian porphyry tin deposit and Ningwu porphyry iron deposit.

Hua Renmin proposed in 2005 [9] that there were three large-scale mineralization in Mesozoic in South China, all in Yanshan period. Among them, the first time occurred in the early Yanshanian period of 180 ~ 170 Ma, represented by copper, lead, zinc and (gold) mineralization in northeast Jiangxi and southeast Hunan. The second time occurred in the second stage of the middle Yanshanian period (about 150 ~ 139 Ma), mainly due to the mineralization of nonferrous and rare metals such as tungsten, tin, niobium and tantalum in Nanling and its adjacent areas. The third mineralization took place in the late Yanshanian period of 125 ~ 98 Ma, represented by iron, copper, gold and sulfur mineralization in the middle and lower reaches of the Yangtze River, tin and uranium mineralization in Nanling area and gold, copper, lead, zinc and silver mineralization in the southeast coast. These three large-scale metallogenesis in Mesozoic in South China are the products of the development and evolution of lithosphere in this area, which are closely related to the dynamic background of extension, the interaction between crust and mantle and the participation of deep thermal fluid.

Many scholars have paid attention to and summarized the Yanshanian magmatic explosion and ore-forming explosion in the southeast of China [10, 1 1], which has important guiding significance for prospecting in Anhui, Jiangxi and other provinces. The metallogenic models of Ningwu porphyry iron mine, Dexing porphyry copper mine, Luzong Longqiao iron mine, Shaxi porphyry copper mine and Lengshuikeng porphyry-stratabound Ag-Pb-Zn comprehensive metallogenic model are preliminarily summarized. The latter can be subdivided into Yinluling porphyry Pb-Zn-Ag deposit (large scale), Xiabao volcano intermittent stratabound Ag-Pb-Zn deposit (large and medium scale) and Yinluling NW-trending vein type Au-Ag deposit (medium scale). Self-metasomatic Ta-Nb ore (super-large) occurs in alkaline small rocks of Hengfeng and Wugongshan, and belongs to A-type granite alteration type and contact metasomatic type.

The famous copper factory, Fujiawu, Cinnabar, Yinshan and other porphyry copper mines have all reached super-large scale. Passing through Pingxiang-Guangfeng deep fault zone along the northeast Jiangxi fault zone to the southwest, it can extend to Jianjianling, Le 'an and Xiangshan, and to Shexian-Jixi in Anhui Province and even Liyang in Jiangsu Province to the north. There are still many suspected porphyry copper deposits to be verified. In addition, it is speculated that there may be another porphyry copper belt to the west of Ganjiang River, which is parallel to the northeast of Jiangxi Province and may involve Shanggao, Gaoan, Wuning and Jiurui. The above two porphyry copper belts are the products of Yanshanian volcanic-intrusive metallogenic system.

2 New progress in regional prospecting

In recent years, Jiangxi, Anhui and other provincial geological prospecting bureaus have made great progress.

(1) The W-Sn metallogenic sub-zone of Yunshan-Zhanggongshan-Baijishan-Tianmushan in the northern margin of Jiuling has been preliminarily determined. The tungsten-tin metallogenic belt in northern Guangxi in the west of Jiangnan uplift extends to the east of Jiangnan uplift. Self-study water, Wuning and De 'an in this area cross Poyang Lake and go along NE to Jingdezhen, Wuyuan, Jixi and Ningguo in the northeast of Jiangxi. The east-west direction is 300 ~ 500 km long and 60km wide. The newly developed Xianglushan large-scale tungsten mine, Pengshan medium-sized tin mine, Yunshan tin mine, Maopengdian-Bazinao tin mine, Bletilla striata-Xiaoyao-Qiaochuan-Xiwukou and other existing medium-sized tungsten mines.

(2) Mesoproterozoic rift (? ) Important information of metamorphic bimodal volcanic rocks in Zhongkong copper mineralization belt. This belt runs from Luocheng, Jiangxi to Yaxi, Yifeng, and may extend eastward to Gao 'an. It is connected with Xiuning in southern Anhui, Huangtuling and Shuizhukeng stratabound copper belts in Shexian through Jingdezhen. The important deposits are Wanzai Luocheng-Yifeng Yaxi and Xiuning Huangtuling. This opens up a new horizon for prospecting in Jiuling uplift area and has certain regional prospecting value.

(3) Mesoproterozoic (? ) An important clue to the metamorphic bimodal volcanic rocks in the Ola trough. This belt extends eastward from Tiesha Street in Lead Mountain, Jiangxi Province to Wuwang, which may be related to Proterozoic (? Metamorphic bimodal volcanic rocks are connected with intermediate copper-controlling deposits. It provides new evidence for prospecting in the northern margin (or adjacent margin) of Cathaysian block.

(4) A large-super-large Duyu Yinkeng Pb-Zn (Au-Ag) deposit was discovered in the Neoproterozoic Qingbaikou stratum on the western margin of Wuyi terrane. The geotectonic position is located in the northeast rift basin of Qingbaikou period in central Jiangxi-the combination zone of Wuyi block and Luo Xiao block. The second layer of ore occurs in the siliceous dolomite interlayer of tuffaceous pyroclastic rock of Shangshi Formation, and the average grade of lead and zinc is 7% ~ 14%. Extend for 4 ~ 5 kilometers. Yinkeng Mining Area has obtained 333+334 resources: lead+zinc 1969700 tons, gold 48.5 tons and silver 1302.55 tons (according to Gui Rongrong and Zhang Jiajing in 2004). Regionally, the Neoproterozoic Qingbaikou-Nanhua system passed Ningdu-Guangchang-Nanfeng-Cheng Nan-Jinxi from south to north, and turned eastward to lead mountain area. In recent years, a medium-sized lead-zinc deposit was discovered in the Neoproterozoic Qingbaikou Nanhua System in Changshouyuan, Qianshan. The mineralization fault zone is 15km long from east to west. Geochemical anomalies are large in scale, high in intensity and comprehensive. The western and northern margins of Wuyi terrane have the prospect of finding stratabound-superimposed lead-zinc polymetallic deposits in Qingbaikou system.

(5) A gold belt with a length of about 10km has been preliminarily delineated along the northeast Jiangxi fault in the area of Lingshan-Lianhuashan-Baijishan in Xiuning, southern Anhui. It consists of two mineralization zones, the eastern and the western. East ore belt (Gulou ore belt) is divided into several ore sections from south to north, which is about 8.5km long. The parallel western ore belt (Xiaohe ore belt) is divided into four ore sections from south to north, such as Xinlingjiao-Hanjia-Tianjingshan-Xiaohe, which is about 7km long. The width of gold-bearing silicification crushing is 3 ~ 5m, and the average grade is (5 ~ 9) ×10-6 (Wang, 2003). The mineralized zone occurs in the tuffaceous sandstone slate of the Middle Neoproterozoic, with bimodal volcanic rocks. This area has a good prospect for finding Jinshan-type stratabound-tectonic altered rock-type gold deposits.

(6) The prospecting prospect of Tongling-Fanchang Cu-Pb-Zn metallogenic area is further expanded. In recent years, skarn-type Cu-Fe-Zn ore bodies have been found in the contact zone between granodiorite and banded limestone of Triassic and Longshan Formation below Fuchengdun in Fanchang, with a thickness of 10 m, containing Cu 1% ~ 3%, Zn 1% ~ 3% and an initial control length of more than 800 m. It is estimated that the copper mine can be used. 8 12 Geological Brigade discovered a porphyry copper deposit in Shujiadian anticline in Nanling County, with medium-sized prospective resources (Wei Xu, 2005).

(7) Through regional comprehensive comparison, the ore-bearing formation of Nanhua sandstone-moraine system in the northern margin of Jiuling-Lugongshan Mountain has been recently determined, which may constitute a copper-tin polymetallic prospecting prospect. This is a brand-new exploratory achievement. Ore-bearing structures are stably distributed along NE-NNE direction, about 500km. Covered on metamorphic basement of Mesoproterozoic greenschist facies and volcanic basement of Neoproterozoic rift. Extensive Yanshanian tectonic-magmatic activities were superimposed in this area. A series of tin-copper-lead-zinc polymetallic deposits and occurrences occurred in the same horizon of Nanhua system were discovered along this belt. Typical examples are Zhang 18th large lead-zinc mine in De 'an, Guoqiao sandstone copper mine and Lishan gold mine. Zhangshiba lead-zinc mine is a large-scale deposit newly discovered in recent years, and it is being explored and evaluated. The ore body is layered, and the controlled area has exceeded 3km2. There are two main ore bodies, the thickness of which is 0.7~2.5m, and the grade of lead-zinc ore is 4% ~ 6%. The layered structure is stable, and the coefficient of variation of thickness and grade is very small. At present, the reserves (resources) have been controlled, with lead and zinc reaching 3.2 million tons and silver 1.060 tons, accompanied by cadmium, thallium and selenium (Wang Shilin and Gao Wenliang, 2005).

(8) A few years ago, Jiangxi Metallurgical Geological Exploration Bureau discovered Hengfeng Ge Yuan super-large Ta-Nb polymetallic deposit, which initially revealed that a large Ta-Nb mineralization concentration area related to alkaline granite appeared around Lingshan rock mass in Huai Yu terrane, Jiangxi province. Ge Yuan super-large Ta-Nb deposit is a polymetallic deposit. Except for Ta, Nb, W and Sn, which are all medium-sized, Pb and Zn are small-sized, and rubidium associated with * * * is also oversized. Lithium and cesium can also be comprehensively utilized. In addition to Ge Yuan Ta-Nb deposits, there are more than 65,438+00 Ta-Nb deposits, occurrences and mineralization points in Huangshandi (large-scale), Shirentang, Crystal Mountain, Daling, Tangjia, Nantang, Jiuniu, Nanshan and Nannilu (Wei Xinglin and Deng, 2004).

3 exploration prospect constituency

Based on comprehensive analysis of multiple information such as physics, chemistry, distant and heavy minerals, as well as decades of prospecting experience, theoretical summary and multiple screening of previous metallogenic predictions [12 ~ 16], the following 10 prospecting prospect is put forward for reference in the new round of prospecting macro deployment.

3. 1 Jiujiang-Ruichang remote scenic spot

Main minerals: copper, molybdenum and gold.

Main attack type: Wushan-Chengmenshan stratabound skarn type (trinity type).

It is known that there is still great resource potential in the depth and periphery of the deposit, and the edge and depth of Chengmenshan copper mine, Wushan copper mine and Dengjiashan copper-molybdenum-gold mine are the main targets for deep prospecting. In addition, the periphery and depth of Fengshandong copper mine, Dingjiashan copper mine and Yangjishan gold mine also have prospecting potential. Chengmenshan copper mine, Wushan copper mine and Dengjiashan copper-molybdenum-gold mine can be preliminarily selected for location prediction and verification of deep and marginal deposits. The skarn copper-molybdenum ore body in the contact zone between the shallow copper body and the deep rock body along the strike in Longdanggou ore section of Dengjiashan copper-molybdenum-gold mining area is tracked and controlled. In addition, the copper-lead-zinc ore body and cryptoexplosive breccia gold ore body in Zhulintang ore section in the east of Fengshandong copper mine may still extend to the edge and deep, which is worth digging deep to find blindness and explore more resources.

Figure 1 10 Prospecting area in the adjacent areas of Anhui and Jiangxi.

3.2 Wuning-De 'an Far Scenic Area

Main minerals: copper, lead, zinc, tin, antimony and gold.

Main attack type: Zhang/Zeng Jialong-style stratabound overlapping modification.

It is located at the intersection and turning point of nearly east-west and north-south structures. Pengshan dome structure has a Neoproterozoic South China-Sinian volcanic rock-sandstone-moraine-carbonate ore-bearing formation, and the deep part is a concealed Yanshanian granite basement. According to the preliminary study of Anhui-Jiangxi project, there are two metallogenic systems in this area, namely Neoproterozoic volcanic jet sedimentary metallogenic system and Yanshan-Xishan magmatic hydrothermal metallogenic system (including superimposed mineralization).

The geological conditions of mineralization in Pengshan area are particularly superior, and the comprehensive information of mineral resources is rich. Taking Zhangshiba lead-zinc mine control area as a known model unit, through model comparison and estimation, the total lead and zinc resources exceed100000 tons, copper resources exceed100000 tons, and silver resources exceed100000 tons. It has a prospecting prospect for super-large deposits. It is suggested that "research on comprehensive information prospecting model and total mineral resources prediction" should be carried out, and on this basis, Pengshan area should be taken as the general battlefield and the comparison model unit as the sub-theater, and new technologies and methods should be adopted to drill holes and conduct comprehensive investigation and evaluation.

3.3 Huaining-Anqing Remote Scenic Area

Main minerals: copper, iron, gold (sulfur).

Main deposit types: Yueshan skarn type and volcanic rock type.

In the surrounding area of Yueshan rock mass, the ore-bearing strata are mainly Carboniferous Huanglong Formation and Chuanshan Formation or Permian and Triassic dolomite marl, and the intersection of east-west faults and fold uplift or depression is a favorable structure for magmatic activity and mineralization. A number of sulfur, iron, gold and copper deposits such as Yueshan copper mine and Caiguashan-Bailing gold mine have been discovered. Duxiu Mountain anticline in the west is a fold area dominated by Paleozoic strata, with low and slow magnetic anomalies, gravity anomalies, low resistivity anomalies and geochemical anomalies. The preliminary interpretation of the anomaly shows that there are concealed rock masses in the deep part and high emplacement at the top, which is beneficial to mineralization. Among them, Huxing Mountain and Yinzhushan Mountain have the background of searching for "Dongguashan Copper Mine" and the potential areas of searching for large and medium-sized skarn copper resources. Iron hat generally exists in the strata of Wu Tong Formation, but due to the relatively low level of research and work, its metallogenic conditions can be compared with Tongling and southeastern Hubei, especially in the Carboniferous ore-bearing strata, and the middle boundary skarn copper deposit has not been broken. Huaining volcanic basin in the west belongs to one of more than ten basins in the metallogenic belt in the middle and lower reaches of the Yangtze River. The two volcanic basins adjacent to this area, Luzong and Ningwu in the east, are rich in copper, iron, gold, sulfur and other minerals, but the work level in this area is low and no major breakthrough has been made. Focusing on the breakthrough of Huxingshan and Yinzhushan skarn copper deposits, this area has opened up new prospecting work in Huaining volcanic basin and achieved new regional prospecting breakthroughs.

3.4 Tongling-Fanchang Scenic Area

Main minerals: copper, iron, gold, sulfur, lead and zinc.

Main deposit types: Shizishan skarn type and stratabound superposition (trinity) type.

The intersection of the northeast fold structure composed of Silurian-Triassic and the nearly east-west or nearly north-south faults in this area is often a favorable place for the formation of magmatic rocks, ore fields and deposits. Middle Carboniferous, Permian and Triassic dolomite limestone are the main ore-bearing strata. Late Jurassic-Cretaceous intermediate-acid magmatism was frequent, and related iron, copper and gold minerals were abundant. There are dozens of large, medium and small deposits that have been proved, such as Tongguan Mountain, Lion Mountain, Phoenix Mountain, Dongguashan, Xinqiao, Mashan and Huangshi Laoshan.

In recent years, large Cu-Pb-Zn metallogenic belts have been discovered in Baimuling-Yeshan and Suishan through geodesy. Worth further verification. First, strengthen in-depth exploration; The second is to expand to the periphery of Nanling-Fanchang. In recent years, the Institute of Mineral Resources of Chinese Academy of Geological Sciences has carried out regional alteration-fluid mapping, and established a new metallogenic model with four major metallogenic systems and seven subsystems, which has broadened the horizons and prospecting ideas for the trinity deposits around Tongling, Fanchang and Nanling.

3.5 Lujiang-Zongyang Volcanic Basin and Its Surrounding Prospective Area

Main minerals: iron, copper and sulfur.

Main deposit types: volcanic porphyry (iron ore) and porphyry (copper ore).

Luzong volcanic basin is located in Luzong county, and it is distributed in the northeast. The west side is cut by the Tancheng-Lujiang fault, showing a large semicircle. Volcanic basin is an inherited volcanic basin superimposed on a composite syncline composed of Silurian-Triassic and early and middle Jurassic strata. Volcanic rock series can be divided into four cycles from morning till night: Longmenyuan (rough andesite), Zhuanqiao (rough andesite), Shuangmiao (rough andesite-potash) and Fushan (rough surface).

In Luzong volcanic basin and its surrounding areas, besides Luohe and Dabaozhuang, large iron and sulfur deposits have been discovered, as well as Shaxi large porphyry copper mine, Longqiao large iron-rich mine and Yueshan medium-sized lead-zinc mine. There are many areas around the volcanic basin with the same metallogenic conditions and geophysical and geochemical anomalies, such as Huangtun Huangnihe-Panshiling in the northern margin of the basin and Huigongyutangaodian in the southwest of the basin, all of which have many gravity, magnetic and geophysical anomalies. It has the potential to discover Longqiao Iron Mine, Porphyry Iron Mine and Porphyry Copper Mine. Strengthen comprehensive analysis and drilling verification. It is very possible to achieve a major breakthrough in prospecting.

3.6 Pengze-Shitai-Guichi Remote Scenic Area

Main minerals: copper and gold.

Main attack types: sandstone type (copper-silver mine), altered rock type (gold mine) and porphyry type (copper mine).

This area is located in the southeast edge of the reflex arc with the south protruding of Huaiyang mountain structure, and the structural pattern of Hukou section is similar to that of Peng Mountain in De 'an. There are South China-Sinian sandstone-moraine-carbonate rocks and late Paleozoic clastic rocks-carbonate rocks. There are a few Yanshanian rock masses on the surface, and it is inferred that there are three hidden rock bases through gravity, magnetic and geophysical anomalies. Remarkable copper geochemical anomalies are distributed along regional tectonic lines. Twenty-two Cu-Au deposits (spots) such as Guoqiao, Huashan, Dabeijian and Lishan have been discovered in Nanhua System in pengze county area, and the ore belt extends intermittently for about 50 kilometers. It has great prospecting prospects.

Guichi metallogenic area is roughly consistent with foreland reverse fold thrust belt. The discovered deposits are mainly skarn-type and hydrothermal copper deposits, followed by porphyry copper-gold mineralization and hydrothermal tungsten-molybdenum-lead-zinc mineralization. Especially in the porphyry belt in this area, it is also one of the porphyry belts symmetrically distributed on both sides of Jiangnan uplift, and copper-gold polymetallic mineralization generally occurs. In recent years, the exploration work in Guichi County has successively discovered Paodaoling porphyry gold mine, Mashi and Tongshanpai-Zilaishan porphyry copper mine, all of which have reached small and medium scale. It shows that this area has great potential to find porphyry copper and gold deposits.

3.7 Baiji Mountain-Tianmu Mountain Remote Scenic Area

Main minerals: copper, lead, zinc, gold, silver, tungsten, tin and molybdenum.

Main deposit types: volcanic jet sedimentary type, porphyry type, trinity type and ductile shear zone type.

This area is located in the northeast edge of Jiuling-Shigong Mountain, and the northeast Jiangxi-Ningguo fault runs through the middle in NE direction. There are Mesoproterozoic volcanic rock series, Qingbaikou amphibious bimodal volcanic rock series, South China-Sinian-Cambrian moraine-carbonate rock-carbonaceous shale and other ore-bearing formations. Tunxi and Qingliangshan volcanic basins developed in Mesozoic, and there were many intrusive rocks in Yanshanian. Remarkable geochemical anomalies are distributed in clusters, and many gravity and magnetic anomalies are nested in them. Medium-sized Cu-Au-W-Pb-Zn deposits such as Sanbao, Huangtuling, Qiaochuan, International Gorge, Xiaoyao, Xiwukou, Dawujian and Xiaohe have been discovered. As long as we can increase investment and work systematically, we will certainly find some large-scale deposits in such a unique and excellent metallogenic environment.

According to the work in recent years, the target areas for general survey and pre-survey are Hongcunkou-Censhan, Huangtuling-jiepai-Fangwukou, Jiumushan-Fiona Fang, Jiezhuying-Julin, Changchun dock, Qianmuchang, Torreya Pit, Dawujian and Meng Jie.

3.8 Eight-character Brain-Zhanggongshan Remote Scenic Area

Main minerals: mainly tin-tungsten ore, taking into account gold ore.

The main attack types are: rock type (tin ore) and structural altered rock type (gold mine) related to ductile-brittle shear zone.

This area is located in the core of Zhigongshan block. The turbidite of Mesoproterozoic Shuangqiaoshan Group contains Suk Kim tungsten formation, and the Yanshanian small intrusive rock -S-type granite porphyry is distributed in series, which is covered with dense geochemical anomalies. A number of ore occurrences such as Maopengdian medium-sized tin mine, Jinjiawu large-scale gold mine, Dabeiwu medium-sized gold mine and Qingshuxia medium-sized tungsten mine have been discovered. Strengthen the general survey and pre-investigation, and the prospecting prospect will become increasingly clear. The key work areas for investigation and evaluation are Bankengwu-Maopengdian tin mine and Jialu gold mine.

3.9 Dexing-Huaiyushan Scenic Area

Main minerals: copper, gold, silver, niobium, tantalum, lead and zinc.

Main deposit types: porphyry type, ductile shear zone type, stratabound superimposed transformation type and altered granite type.

This area is located in the collision zone between Jiangnan terrane and Qiantang terrane-the northeast Jiangxi collision mixed zone and its two sides, and the Huai Yu block is sandwiched in the triangle formed by the deep fault in northeast Jiangxi and the Lean River. There are Mesoproterozoic volcanic turbidites in Zhang Cun Group, Sinian moraine carbonate rocks in South China and late Paleozoic ore-bearing formations. Yanshanian magmatism was intense. Due to the unique geological background and tectonic magmatic conditions, two major metallogenic series have been formed: dynamic metamorphic mineralization and volcanic-porphyry mineralization.

The deposits that have been explored and developed mainly include Tongchang super-large copper (gold) mine, Fujiawu super-large copper-molybdenum mine, Yinshan super-large copper-polymetallic mine, Jinshan super-large gold mine, Xijiang medium-large gold mine and Ge Yuan super-large tantalum-niobium mine. The proven copper reserves are100000 tons, accounting for 7.5% of the total reserves in China. It is a famous gold and copper mineralization concentration area in China. The depth of copper-gold mineralization in Tongchang-Zhushahong area and Xiyuanling area in northwest China is greater than 1200m. While strengthening the summary of metallogenic zoning law, developing new geophysical prospecting methods, increasing drilling depth and looking for new concealed ore bodies, there is still hope to greatly increase reserves. In addition, the South China-Sinian medium-sized layered lead-zinc mine (such as Banzhukeng) has a low degree of work and a good prospecting prospect (Yang Minggui, 2004).

365438+100000 years-Yifeng remote scenic spot

Main minerals: copper, gold, lead and zinc.

The main deposit types are porphyry type, stratabound superimposed reformation type and ductile shear zone type.

This area is located in the contact area between Jiuling terrane and Pingle junction zone, and the northeast Yifeng-Nanchang deep fault is a regional rock-controlling and ore-controlling structure. There are Mesoproterozoic Yifeng Formation volcanic turbidites and late Paleozoic carbonate ore-bearing formations. Yanshanian intrusion was strong. The geochemical anomalies of copper and gold are mainly distributed along the volcanic rocks of Yifeng Formation, and there are many gravity and magnetic anomalies. The stratabound skarn-type medium-sized Cu-Fe-Pb-Zn deposit in front of Gao 'an village and the Luocheng, Yaxi and Pengyuan copper deposits related to the Mesoproterozoic Xibijiao porphyry system were discovered. This area has the metallogenic background conditions of Dexing porphyry copper deposit. Work hard and there may be a major breakthrough.

Acknowledgement: This paper is a rough understanding of the research results of the subordinate research project of "Mineral Resources Evaluation Project in the Adjacent Areas of Anhui and Jiangxi". The work has been strongly supported by the leaders of China Geological Survey, Nanjing Institute of Geology and Mineral Resources, Jiangxi Geological Survey Institute, metallurgy and other geological prospecting units and the author of Geological Prospecting Miners. Here it is, thank you very much!

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Mineralization and prospecting prospect in Anhui and Jiangxi areas

He Jurui, Wang Aiguo, Ceng Yong, Rui Xingjian.

(Nanjing Institute of Geology and Mineral Resources, Nanjing 2 100 16)

Abstract: There are four metallogenic systems in Anhui and Jiangxi provinces: Mesoproterozoic submarine volcanic system; Neoproterozoic submarine hydrothermal sedimentary system; Late Paleozoic hydrothermal deposition (accretion) system and Mesozoic volcanic-intrusive magma system. Recently, we have gained a lot of new output and developed nine ore belts. The comprehensive information shows that 10 prospecting areas can be used as the focus of the next prospecting.

Keywords: Wan 'an area; Mineralization system; Prospecting prospect