# Construction, Test and Application of a Tungsten Metallogene Named MGW11: Case Studies in China
## 4 Application of Geochemical Exploration in Lianyang Area
### Materials, Results and Discussion  
In the Lianyang area, a total of 1393 geochemical records (or samples) of stream sediments were retrieved from the database of the RGNR (Regional Geochemistry-National Reconnaissance) project [12]. In this project or database, stream sediment is the sampling media with a scale of 1:200,000 and was analyzed with 10 major components (SiO\({}_{2}\), Al\({}_{2}\)O\({}_{3}\), Fe\({}_{2}\)O\({}_{3}\) or TFe\({}_{2}\)O\({}_{3}\), K\({}_{2}\)O, Na\({}_{2}\)O, CaO, MgO, Ti, P, and Mn) and 29 trace elements (W, Sn, Mo, Bi, Cu, Pb, Zn, Cd, Au, Ag, As, Sb, Hg, Li, Be, Sr, Ba, B, F, V, Cr, Co, Ni, Zr, Nb, Th, U, Y, and La) [25]. Figure 5: Geological map of Lianyang area (**a**) and geochemical maps of the LG_CR (**b**), \(R_{\text{IdealOre}}\) of MGW (**c**), and \(R_{\text{IdealOre}}\) of MGW11 (**d**). Figure 5a is modified after the G49 with a scale of 1:1000,000 from China Geological Survey with notes are as the followings. 1—Quaternary sand and gravel mixed with clay silty sand; 2—Cretaceous sandy conglomerate, pebbled sandstone and siltstone; 3—Jurassic sandstone, siltstone, grit stone and mudstone; 4—Triassic limestone and mudstone; 5—Permian limestone and mudstone; 6—Carboniferous dolomitic limestone and dolomite; 7—Devonian sandstone and dolomitic limestone; 8—Cambrian sandstone, slate and siltstone; 9—Proterozoic sandstone, siltstone and slate; 10—Monzogranite; 11—Granodiorite; 12—Quartz-dioritic porphyrite; 13—Periodite; 14—Petrological boundary; 15—Fault; 16—Main residential place; 17—Locations of LY18D13 and LY18D06 weathering profiles; 18—Au deposit; 19—Cu deposit; 20—Polymetallic W deposit; 21—Mo-Fe deposit. Based on the geochemical data of each record which represents an area of four square kilometers, the gene codes and their acidic similarities (\(R_{\text{Acidic}}\)) of LG01 and LG03 are calculated on the GGC software [1] firstly. Then the LG_CR results of the 1393 samples are derived according to the method proposed by [PERSON] et al. [2]. The geochemical map of the LG_CR in the Lianyang area is illustrated in Figure 5b. Although nine types of LG_CR can be classified theoretically on double-digit numbers based on the acidic similarities of LG01 and LG03 lithogenes, only four types are recognized in the Lianyang area as 11, 12, 21, and 22 types. The 11 types of LG_CR are dominant in the whole study area, and the other types of 12, 21, and 22 are located sporadically in the east and north of the area. Therefore, the Lianyang area can be viewed as an area of 11 types of LG_CR compositionally by and large. Based on the geochemical data of the 1393 records, the gene codes and their mineralization similarities (\(R_{\text{IdealOre}}\)) of MGW and MGW11 are calculated. The geochemical maps of the \(R_{\text{IdealOre}}\) of MGW and MGW11 in the Lianyang area are illustrated in Figure 5c,d. In these maps, the blue areas with \(0\leq R_{\text{IdealOre}}\leq 20\) can be viewed as the normal background area, the yellow area with \(20<R_{\text{IdealOre}}<40\) can be viewed as the higher background area, and the red area with \(40\leq R_{\text{IdealOre}}\leq 100\) are the anomaly areas for tungsten exploration. Furthermore, the anomaly areas can be divided into three zones; the outer zone with \(40\leq R_{\text{IdealOre}}<60\), the middle zone with \(60\leq R_{\text{IdealOre}}<80\), and the inner zone with \(80\leq R_{\text{IdealOre}}\leq 100\) (Figure 5c,d). By comparing the deposits and the anomaly areas spatially in the Lianyang area, we can find that a total of six polymetallic W deposits in the study area are all located in the anomaly areas determined on the \(R_{\text{IdealOre}}\) of MGW (Figure 5c) and MGW11 (Figure 5d). This indicated that the mineralization similarities of MGW and MGW11 can be viewed as useful integrated indices on geochemical tungsten exploration. With respect to the three Cu deposits in the study area, one is located in the anomaly area, one is near the anomaly area, and one is in the background area determined on MGW (Figure 5c) and MGW11 (Figure 5d).