| Tungsten resources are abundant in China,and the Southern Jiangxi Province area is one of the most abundant tungsten deposit.A great deal of work has been done in most areas of Southern Jiangxi Province,but the prospecting data of Huangzhulong-Changliukeng tungsten-tin ore field are few,and it is found that the quartz vein type tungsten-tin deposit in this area is a concealed deposit through the only available data,and the prospecting method of soil geochemistry is better.In this paper,the soil geochemical survey of 1∶10000 in Bikeng tungsten-tin ore exploration area,Chongyi County,Southern Jiangxi province was carried out to test the W,Sn,Ag,Cu,Mo,Pb,As,Zn and Au which are closely related to the tungsten and tin deposit in this area and draw the anomaly map.Combined with Bikeng tungsten-tin ore exploration area geological background,using the correlation analysis,cluster analysis and factor analysis method to comprehensive analysis of zone soil geochemical characteristics,a set of soil geochemical prospecting model is set up.The prospecting effect has been verified in the Shizuinao tungsten-tin ore exploration area,and the prospecting effect is good,in order to further in the Huangzhulong-Changliukeng tungsten-tin polymetallic ore field provides the basis for prospecting.The main conclusions are as follows:(1)Ore-hosting strata in Bikeng tungsten-tin ore exploration area are mainly Gaotan Formation of Middle Cambrian and Shuishi Formation of Upper Cambrian.The folds and faults are well developed in the area,and the tectonic activity time is longer,the form is more complex,and the faults cut off each other,which provides favorable geological conditions for the formation of tungsten-tin ore.(2)The Sn,W,Ag,Cu,Mo,Pb,As,Zn and Au in Bikeng tungsten-tin ore exploration area can be divided into four element assemblages.The first group is composed of Sn,W,Ag,Cu and Mo.The second group is composed of Pb and As.The third group is Zn;The fourth group only had Au.The element anomaly diagram shows that there are three Sn anomalies with large scale,and the anomaly range basically overlaps with the vein zone.There are 3large anomalies of W element.There are two large Ag anomalies.Cu and Mo anomalies are weak and distributed sporadically in the exploration area.(3)Borehole verification of soil geochemical anomaly in Bikeng tungsten-tin ore exploration area,combined with fracture structure and soil geochemical anomaly,the borehole revealed clearly.Along the horizontal direction,the ore body has the characteristics of high density and high rate of veins in the central part,and gradually thinning and decreasing vein rate in the lateral part.In the dip direction,the number of quartz veinlets in the upper part is large and the single thickness is small,while the number of quartz veinlets in the lower part is small and the single thickness becomes larger,but the total thickness of quartz veinlets remains stable and presents the characteristic of "five levels".This method also has good prospecting effect in Shizuinao tungsten-tin ore exploration area.(4)The prospecting criteria of quartz vein type tungsten-tin deposit in Bikeng tungsten-tin ore exploration area are as follows: Ordovician and Cambrian metamorphic rocks;The junction of fault structures;Geochemical anomalies of W and Sn elements;Quartz veinlets in tungsten and tin deposits are often formed at the intersection of fault structures,indicating that tungsten and tin bearing ore bodies may exist in the deep. |
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