2012 7 Jul. 2012 33 4 : 693-702 Acta Geoscientica Sinica Vol.33 No.4: 693-702 www.cagsbulletin.com www. 地球学报.com 摘 1), 2), 1), 1), 1) 1), 610059; 2), 100083 要 : : ( ),, R-1 R-2 R-3,, R-1 Cu-Mo-Se-Te (Bi)-Pb-Zn As-Sb-Tl,,, ; R-2 Te Se Sb Pb Zn Cu Mo ; R-3,, 关键词 : ; ; ; ; 中图分类号 : P618.41; P632.2 文献标志码 : A doi: 10.3975/cagsb.2012.04.29 Lithogeochemical Anomaly Characteristics and Ore-Search Targeting of the Gaerqiong Gold-Copper Ore District in Ge gyai County, Tibet WANG Hong-xing 1), YAO Xiao-feng 2), LI Zhi-jun 1), HU Zheng-hua 1), ZHANG Zhi 1) 1) Chengdu University of Technology, Chengdu, Sichuan 610059; 2) China University of Geosciences, Beijing 100083 Abstract: The Gaerqiong ore district has three mineralization types, i.e., Cu-Mo mineralization produced in the porphyry ore deposit, Cu-Au mineralization produced in the skarn, and Cu-Au mineralization produced in the structural fracture zone. These three mineralization types all belong to the porphyry mineralization system. The results of lithogeochemical measurement shows the existence of three main anomalies, R-1, R-2 and R-3, in the ore district. Distribution characteristics of elements in three anomalous areas are on the whole similar to each other. There is element zonation of Cu-Mo-Se-Te (Bi)-Pb-Zn As-Sb-Tl distributed from the abnormal concentration center outwards in the R-1 anomaly area, the metallogeny of element association and distribution is characterized by the evolution from high temperature to middle or low temperature, similar to things of the porphyry mineralization system, and hence this area has potential in search for porphyry ore deposits. The weak anomaly of such peripheral elements as Te, Se, Sb, Pb and Zn and strong anomaly of Cu and Mo in R-2 anomaly area show ( : 201011013-3) 973 ( : 2011CB403103) : 2012-06-19; : 2012-07-09 : :,, 1984 E-mail: wanghongxing2010@hotmail.com
694 R-2 anomaly area has been severely denuded. R-3 anomaly area is a porphyry-type mineralization area related to quartz diorite and granodiorite, in which skarn mineralization and structural fracture zone have the best potential in search for ore deposits, and porphyry-type mineralization in the depth also has prospect for ore exploration. Key words: Gaerqiong; Cu-Au deposit; geochemical rock survey; prospecting potential; Tibet 1995 2009, Au Cu Pb 2009 2011 I II,, ( ) ( ), - (, 2006;, 2009;, 2011;, 2011;, 2011b;, 2010;, 2011, 2012a, b;, 2010;, 2011;, 2012;, 2012;, 2012),,,, 1:1,,,,, 1 区域及矿区地质概况 -,,,, 2000 km ( 1;, 2010) S I, (, 2009), ( Re-Os 86.79 Ma;, 2011b), (K 1 d) ( 1), (F 1 ) (F 2 ) (F 3 ), ( 1),, (δμ 3 5 ) (δo 3 5 ) (γπ 3 5 ) (γδ 3 5 ) (γδπ 3 5 ) ; (, 2011) Rb Ba Th U, Nb Ta Zr Hf,, ; Sr Ti,, ; ; Rb K Ti, (, 2010), 87.1±0.4 Ma(, 2012a), I, - ; II, ; III, F 1 ( 1), I III ( ) 2 1:1 万岩石地球化学测量异常特征 2.1,,, (, 2007),,,,,
: 695 图 1 尕尔穷铜金矿区地质简图 ( 曲晓明等, 2006 改绘 ; 李志军等, 2011a) Fig. 1 Geological sketch map of the Gaerqiong copper-gold deposit (after QU xiao-ming et al., 2006; LI Zhi-jun et al., 2011a) R- - ; Mz- ; Pz- ; R- Paleogene and Neogene; Mz- Mesozoic; Pz- Paleozoic, 1154, 39, : (1) : Cu Au Pb Mo Ag ; (2) : As Sb Bi Sn (, 2002;, 1998)
696 U Th (, 2009;, 2012) Au Hg Bi As Sb Ag Cu Mo Pb Zn Se Te W Sn Co Tl 15 Surfer,, Bi Te 120 89, 2 Au Hg Ag Cu Pb Zn As Sb,, Bi>Au>Sb>Ag>Se>As>Te>Cu>Hg>, Pb>Tl>Mo>Co>Sn>Zn, SPSS x 1 2.2 1:10000 x 2 x n,, :, Cu Au, ( 2): C 0 = 1 N N xi i 1 = X ; S= 1 ( xi x) N 1 N i 1 C A = C 0 +1.65S = X +1.65, C 0, C A, S C 0 C A (, 2011) ( 1), : 1, Au Hg Ag Cu Mo Zn Co Tl,, Bi As Sb Pb Se Te Sn,, Bi As Sb Te 3 Table 1 2 R-1 ; R-1 As Ag Cu Mo Pb Sb Se Te Tl Bi Zn Sn Co, Au Hg, Cu Mo R-1, ; Au As Ag Pb Sb Se Te Tl Bi Zn Sn Co Cu, Cu-Mo-Se-Te (Bi)-Pb-Zn As-Sb-Tl,, (, 2010;, 2012) Cu Au,, 表 1 尕尔穷矿区 1: 10000 岩石测量中各元素地球化学特征值表 Geochemical features of various elementsins rock surveyat the scale of 1:10000 in Gaerqiong ore district / / Au 1154 3.13 0.24 871.00 27.75 8.85 0.9 2.0 3.5 0.90 0.40 Hg 1154 28.10 1.70 1451.56 61.84 2.20 17.6 56 90 0.31 0.33 Bi 1154 0.52 0.01 224.33 6.90 13.32 0.1 0.50 0.0043 120.37 46.51 As 1154 15.29 0.11 1069.50 54.25 3.55 5.7 40 2.2 6.95 6.18 Sb 1154 2.09 0.08 575.00 17.48 8.38 0.7 3.0 0.6 3.48 2.33 Ag 1154 0.07 0.02 10.31 0.33 4.62 0.04 0.1 0.08 0.90 1.25 Cu 1154 27.72 0.35 2096.00 74.66 2.69 15.7 72 63 0.44 0.50 Mo 1154 1.00 0.05 22.42 0.97 0.97 0.87 1.2 1.3 0.77 0.92 Pb 1154 12.87 0.50 179.82 13.26 1.03 11.0 22.0 12.0 1.07 1.22 Zn 1154 54.43 3.56 281.90 30.71 0.56 56.2 67 94 0.58 0.71 Se 1154 0.11 0.01 12.40 0.41 3.86 0.05 0.1 0.075 1.43 1.33 Te 1154 0.05 0.01 2.91 0.17 3.38 0.02 0.08 0.00055 89.11 72.73 Sn 1154 1.85 0.39 16.21 1.15 0.62 1.55 2.5 1.70 1.09 1.41 Co 1154 11.38 0.21 135.40 8.86 0.78 10.83 16.0 25 0.46 0.61 Tl 1154 0.37 0.02 5.69 0.36 0.98 0.31 0.50 0.5 0.75 1.00 : Au Hg 10-9, 10-6 (1984)
: 697
698 Fig. 2 图 2 尕尔穷铜金矿岩石地球化学测量各元素异常图 ( 测区范围见图 1) Anomaly map of various elements based on rock geochemical survey in the Gaerqiong copper-gold deposit, Mo Cu, Pb Zn As Sb Tl,,, R-1,,, R-2 R-1 Au As Cu Bi Mo Sn Pb Sb, Zn Co, Te Ag Se Tl, Cu Mo, ; Au Bi Pb Zn Sn Sb Ag Co Cu Mo, R-2 R-1 Cu 3, Mo Cu, Au Cu Mo, Te Se Sb Pb Zn Cu Mo,
: 699 R-3 I III,, (, 2011) Au Cu Mo As Ag Bi Hg Pb Zn Sn Sb Se Te Tl Co Tl (, 1993), R-3, Au Cu Mo Ag As Sb, Cu Mo Zn Pb Co Ni Sn Fe W Bi As Ag Ba(, 2007) R-3 I III, Mo Cu Au Bi Sn, As Sb Hg Pb Zn Co ; Mo Cu Au, - ; F 1 Mo Au, Au Te Sb R-3 Au Cu Mo Ag, I III, As Bi Hg Pb Zn Sn Se Te Tl Co Au Cu Mo Ag, (2012) R-3, 3 结论 (1), R-1 R-2 R-3,, R-1 Cu-Mo-Se-Te (Bi)-Pb-Zn As-Sb-Tl,,, ; R-2 Te Se Sb Pb Zn Cu Mo R-3 (2) ( ),, R-1 R-2,, R-3,, 致谢 : 感谢西藏卓朗基矿业投资有限公司对野外工作和资料收集提供资助, 室内写作过程得到成都理工大学郎兴海博士的指导, 在此一并表示感谢 参考文献 :,,,,. 2011a. [J]. ( ), 38(1): 85-91.. 2011b. [D]. :.,,,,,,,,,,. 2012. [J]., 33(4): 588-600.,,,,,,,,,,. 2011. Ⅲ [J]., ( ): 344-355.,,,,,,,. 2012. [J]., 48(1): 12-23.,,,,,. 2012. [J]., 33(4): 601-612.. 1984. [J]., 8(1): 19-27.,,,,,,,,,,,,,,,. 2011ba. [R]. :.,,,,. 2011ba. Re Os [J]. ( ), 38(6): 678-683.
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