Jurassic mining just came out
If you play the D series,
I can provide you with reference,
basically, it depends on the difficulty you play,
if it is below hell,
and there is no opening push of devourer and double ridged Hunter (attack distance 1000),
I would suggest playing wild cover (ring, TD),
in short,
that is, in the early stage, first use buildings (which must not attack actively)
and then use remote towers (sniper tower, mechanical tower, electron beam gun tower) to guide the Dragon
and leave a hole for the dragon to go, and the dragon will follow your building to the hole side.
can prolong the time for the dragon to be attacked, and also achieve the purpose of fire collection,
(but when there are many dragons, you should remember to control the tower to hit the dragon, otherwise the dragon will still hit the wall)
remember to build an electric wall near the hole.
the dragon will be attracted by the electric wall as soon as it passes through the hole, and then change the attack target to hit the electric wall.
PS: there is another advantage to this game, Even if you don't play - STT or encounter fire in the early and middle stages, you can't fall down
the larger the circle you can cover in the back, or you can use fire to make walls
the following is the ring cover method:
hell gift 120min
when you have certain power, you can build the first house in line 3 and upgrade it to a laboratory. But if we want to proce rockets and lasers, we need to build the second building in line 3, upgrade it to a physics laboratory, and upgrade it to a high-level laboratory. That's it,
1 The main mineralization of this series took place in the collision orogenic stage of Jurassic Cretaceous, and formed silver, tin polymetallic ore, rare metal, tungsten, tin, crystal and other minerals. According to the tectonic environment and types of magmatic intrusions related to mineralization, as well as the differences between mineralization and mineral assemblages, they can be further divided into two sub series: 1) sn-w-ag-pb-zn metallogenic sub series related to post collisional granite in queershan gnei area; 2) sn-w-ag-pb-zn metallogenic sub series related to post collisional granite in queershan gnei area; ② Li-be-nb-ta-w-sn crystal metallogenic subseries related to post collisional granites in Yajiang Jiulong area
(2) sn-w-ag-pb-zn metallogenic subseries related to post collisional granites in queershan gnei area1, In general, it has evolved from porphyry like K-feldspar granite to porphyry like biotite monzogranite and K-feldspar granite. It belongs to calc alkaline rock series and is alkaline. It has the characteristics of crust derived (continental crust reformation) granite. It is comprehensively identified as post orogenic granite, Its formation is mainly related to the crustal superimposition and thickening caused by the collision and orogeny between "Yin island arc" and the Yangtze block in the East and "Jiangda arc" in the east of Tibet
The rocks intruded into the upper Triassic and formed Sn - (W) - polymetallic AG series related to them. The rock bodies directly related to mineralization are mainly porphyry like K-feldspar granite, porphyry like biotite granite, biotite monzogranite and biotite syenite granite. The Sn, Ag, Pb, Zn, Cu and W contents of the rock body are 3-6 times higher than the Clark value, which should be an important ore source of silver, tin and polymetallic deposits in the area The SN trending strike slip faults in Ganzi Litang and Litang Xiasai cut through the SN trending main faults and the tectonic magmatic belt formed in the early stage. At the structural intersection, they are the most favorable areas for the enrichment and mineralization of silver and tin polymetallic deposits. Remote sensing interpretation shows a very clear circular image According to the characteristics of mineral distribution, formation and enrichment conditions and prospecting prospect, it can be divided into two prospective areas: Shiqu dege Ag Sn Cu polymetallic prospective area (North Section) and Yin Ag Sn polymetallic prospective area (south section). This time, the Yin silver tin polymetallic prospective area (south section) is mainly discussed The regional geochemical exploration of1 ∶ 200000 delineated 38 comprehensive anomalies, 17 AG, Sn, Pb and Zn anomalies, 7 Cu and Au anomalies, and 3 Sn and W anomalies. The anomalies are characterized by high total, high peak value, obvious concentration center and clear gradient. The comprehensive anomaly area is 23-180km < sup > 2 < / sup >, and the element overlap is good. The anomaly zone is mainly distributed along the contact zone outside the rock body in NW direction, which is in good agreement with the known ore procing areas
in Xiasai Yuzhong area, there is a NNE negative gravity anomaly belt with a length of more than 100 km and a width of about 50 km, which contains two negative centers, one between Xiasai and chiqiong, and the other 9km northeast of Yuzhong. Xiasai deposit is located at the junction of positive and negative anomalies
the intensity of magnetic field in this area is weak, 30 n ° Most of the areas to the south of 40 ′ are in the aeromagnetic negative anomaly area, 30 ′ is in the aeromagnetic negative anomaly area ° The area to the north of 40 'is the weak positive magnetic anomaly area. The Hailong, Xiasai, Shaxi and gangsunset deposits are all on the zero line of aeromagnetic anomaly, while the cuomolong deposit is close to the zero line
More than 90 mineral deposits have been found in the area, including 2 large-scale (Xiasai, Shaxi), 7 medium-sized (DONGZHONGDA, Zhalong, cuomolong, Lianlong, Hailong, ludinggong, rilong) and 10 small-scale, and the rest are ore spots and mineralization spots. The main minerals are silver, tin, lead, zinc and copper. The mineralization is mainly related to Cretaceous magmatism. The main types of ore deposits are contact metasomatic type and hydrothermal type, followed by greisen type. Ore bodies are mainly controlled by NW trending structures and distributed around the outer contact zone of the rock mass. Silicification, carbonation, skarnization, greisenization, pyritization and limonitization occur in the structural fracture zone At present, most of the discovered deposits (spots) occur in the contact zone and outer contact zone between granite and surrounding rock, with the farthest distance of 5km. In Yin area, the main ore-forming elements change horizontally from high temperature tin rich (hot uplift, heel MA) to medium low temperature Silver rich lead-zinc (Xiasai, Shaxi) from the contact zone of the rock mass, and the deposit type is contact metasomatic (cuomolong type) to hydrothermal (Xiasai type); In the vertical direction, the content of silver and lead graally decreases from the surface to the bottom, while zinc graally increases and copper minerals appear, forming a relatively complete metallogenic series. This is similar to the horizontal and vertical zoning of mineralization of similar rock bodies abroad, that is, Ag, Pb and Zn enrichment zones are far away from the rock bodies, and W, Sn, Mo and Bi enrichment zones are in the contact zone of the rock bodies Most of the ore fields in the area are tin polymetallic ore in contact zone and silver lead zinc ore in outer contact zone or far away from the rock mass. However, e to the low degree of work in the inner and outer contact zone of the rock mass and the transition zone near the rock mass, there are few mineralization data obtained at present, such as changokuo, xinguolongba, cuopu, ruololong, rongyicuo, hagala, etc The deep ore bearing property of the gnei and other rock bodies has not been studied in detail (1) Xiasai type silver polymetallic deposit is located in Cuola Township, Batang County, Ganzi Tibetan Autonomous Prefecture, Sichuan Province, with an altitude of 4450-5050m When the regional geological survey team of Sichuan Bureau of Geology and mineral resources carried out 1 ∶ 200000 Yin sheet regional geological survey (1980), lead and zinc ore spots were found in Xiasai area and geochemical anomalies were delineated. The geochemical exploration team of Sichuan Bureau of Geology and mineral resources (1992) discovered the anomaly of silver, lead, zinc, tin and copper assemblage in the outer circle of Xiasai, and the Xiasai deposit was discovered by grade II verification. The general survey carried out by team 108 (1993-1999) of Sichuan Bureau of Geology and mineral resources confirmed that Xiasai is a large post magmatic hydrothermal vein type silver polymetallic deposit. In recent years, Sichuan Geological Survey Institute has discovered the same Shaxi large-scale silver polymetallic deposit as Xiasai and the large and medium-sized silver polymetallic deposits such as jiaozuima, rilong and Xialong. It has become one of the striking polymetallic ore concentration areas in Western Sichuan Plateau The geotectonic position of the mining area is located in the middle part of the Sanjiang tectonic metallogenic belt in Southwest China, near the middle part of the SN trending queershan gnei granite group. The host rocks are mainly shallow sea littoral facies low metamorphic pyroclastic sedimentary rock series in the lower part of tumugou formation of Upper Triassic. The lithology is metamorphic feldspathic quartz sandstone, slate and rhyolitic pyroclastic sandstone. The fault structure in the mining area is developed, with NNW and NW strike as the main strike and SSW dip. The fault section is wavy. The fault nature is mostly thrust fault, and the structural fracture zone is developed, with fracture bandwidth ranging from 5 to 30m. The main ore bodies (zones) are controlled by this group of faults, and the occurrence is basically consistent with the fault (Fig. 9-5) The intrusive rocks in the mining area are mainly exposed in rongyicuo and ruololong biotite monzogranite, which have similar rock characteristics; The former is exposed 2km southwest of the mining area, and the latter is exposed in the west of the mining area, which has a close spatial relationship with Xiasai silver polymetallic deposit. The rongyicuo biotite monzonitic granite body leans northward under the strata of the mining area, with an exposed area of 122km < sup > 2 < / sup >, roughly in NW direction. Its petrochemical properties are acid rocks with high acidity, alkalinity and high differentiation degree. The REE content and distribution characteristics are consistent with those of "s" type granite (Hu Shihua et al., 1996), The < sup > 40 < / sup > AR / < sup > 39 < / sup > ar crystallization age of rongyicuo granite is 93m (aying Hanlong et al., 2006)there are 16 ore bodies in the mining area, which occur in large vein, lenticular and saccular intervals along the NNW trending fault zone, and occur in the secondary NW and NNW fracture zones, which are nearly parallel distribution. The ore bodies in the fracture zone have the phenomenon of pinch out, branching, compounding and expansion. The ore body is 30-2800m long and 5-80m wide. The (1) ore body is 2200m long, with an average thickness of 1.8m, a controlled vertical depth of 213M and an average grade of 343.85 AG × 10-6,Pb 2.87%,Zn 2.65% 2) No. 1 orebody is 2800m long, with an average thickness of 1.51m, a controlled vertical depth of 274m and an average grade of 339.01 AG × 106,Pb 4.02%,Zn 1.23% 14) No. 1 orebody is 2200m long, with an average thickness of 1.37M, a controlled vertical depth of 169m and an average grade of 465.97 AG × 10-6,Pb 6.58%,Zn2.85%
There are four types of ore in the mining area: Silver rich lead zinc ore, silver lead zinc ore, silver polymetallic ore and silver zinc ore. The ore has massive structure, variegated structure, banded structure, breccia structure, vein veinlet structure, etc The main metal minerals in the ore are as follows:
Fig. 9-5 geological map of Xiasai silver polymetallic deposit
(according to Zou Guangfu et al., 2002)
1-the first member of Upper Triassic tumugou formation; 2-The second member of tumugou formation of Upper Triassic; 3-The third member of tumugou formation of Upper Triassic; 4-The fourth member of tumugou formation of Upper Triassic; 5 - rongyicuo biotite monzogranite; 6-skarn; 7 - silver polymetallic ore body and its number; 8 - thrust fault; 9 - inferred fault; 10 - translational fault; 11 - geological boundary; 12 - ore belt No.
silver bearing minerals are deep red argentite, silver stibnite, silver tetrahedrite and silver gold deposit
The sulfide minerals are pyrrhotite, pyrite, chalrite, galena, sphalerite, stibnite and arsenopyritethe sulfur salt minerals are pillared bismuth lead, orthorhombic bismuth lead, stibnite, tetrahedrite and cassiterite
The natural elements are natural bismuth, bismuth antimony ore and natural antimony The oxide is cassiterite The wall rock alteration is mainly silicification, sericitization, albitization, fluoritization, chloritization, pyritization and carbonation, followed by hornification and skarnization. The mineralization and wall rock alteration are characterized by horizontal zoning from near rock mass to far rock mass, i.e. near (southwest) to rongyicuo rock mass, skarnization is locally developed, wall rock alteration is mainly silicification, sericitization and albitization, ore has low silver content, and ore mineral assemblage is complex cassiterite sulfide; Far away from the rock mass (NE), the wall rock alteration is mainly sericitization, fluoritization and silicification, and the ore contains high silver content. The ore mineral assemblage is silver mineral sulfide, and the further distance is lead, zinc and silver mineralization. From the middle depth to the shallow part of the ore body, the wall rock changes from epidotization to silicification and sericitization. The copper content of the ore graally decreases, while the silver and lead content increases The mineralization process mainly includes skarn stage, hydrothermal stage and supergene stage, in which the hydrothermal stage is the most important stage of deposit formation. According to mineral assemblage, formation sequence and physicochemical conditions, it can be divided into four stages (Hu Shihua et al., 1996): oxygenate stage, early sulfide stage, late sulfide silver stage and carbonation stage. According to the theoretical analysis of excess argon and the source of argon in quartz, as well as a large number of AR ar ages of quartz determined in recent years, and according to the geological conditions, it is inferred that the age of quartz < sup > 40 < / sup > AR / < sup > 39 < / sup > AR in the main metallogenic stage of Xiasai silver polymetallic deposit, that is, the late sulfide silver metallogenic stage, is about 75 ma, It can represent the time of silver mineralization (Ying Hanlong et al., 2006). The homogenization temperature of fluid inclusions in the deposit ranges from 95 ℃ to 230 ℃ (Zou Guangfu et al., 2002). The results of sulfur and lead isotope study show that sulfur may come from the flower