STRUCTURAL CONTROL OVER THE ORE IN HENGJIAN-GANGSHANGYING DEPOSITS IN XIANGSHAN ORE FIELD, JIANGXI PROVINCE
-
摘要: 横涧-岗上英铀矿床产在相山大型塌陷式火山盆地的北部, 区域NE向、EW向断裂构造与火山构造复合控制次花岗斑岩体和铀矿床的定位, 矿区次花岗斑岩的产出明显受到高角度逆断层的制约, 铀矿化主要受构造裂隙控制, 含矿裂隙带沿斑岩体内外接触带呈弧形展布。依据横涧-岗上英地区次花岗斑岩岩体及矿体空间展布及产状特征, 厘定了控岩构造系统, 通过分析构造裂隙特征及其与铀矿化的关系, 划分了成矿前、成矿期、成矿后构造体系, 初步认为矿区的构造演化可分为三期6个阶段。Abstract: The Hengjian-Gangshanying deposits are located in the north of Xiangshan collapse volcanic basin. Regionally the NE and EW striking faults and volcanic faults jointly exert control on the position of subgranitic porphyry and uranium deposits. Locations of subgranitic porphyry are obviously confined by high-angle thrusts, and uranium mineralization is primarily controlled by fissures.The ore-bearing fissures display an arch extension along inner and outer contact zones of the porphyry. Based on spatial distribution and attitude of subgranitic porphyry in the Hengjiang-Gangshangying area, this paper has defined the system of rock-controlled structures. By analyzing the relationship between structural fissures and uranium mineralization, the authors have divided the structure system into pre-ore stage, ore stage and post-ore stage, and believed that the structures experienced 3 epoches with 6 stages.
-
图 1 赣杭火山岩带西段地质示意图
1.上白垩统红色砂砾岩; 2.上侏罗统火山岩系; 3.上三叠统-下侏罗统长英质砂岩、页岩夹煤层; 4.上古生界砂岩、页岩; 5.震旦系变质岩; 6.次花岗斑岩; 7.燕山期花岗岩; 8.印支期花岗岩; 9.加里东期花岗岩; 10.深断裂及一般断裂; 11.研究区位置
Figure 1. Geological sketch of the west segment of Ganhang volcanic zone
图 2 相山矿田北部区域断裂、火山环状断裂及次火山岩复合控矿示意图
1.鹅湖岭组上段碎斑熔岩; 2.鹅湖岭组下段砂岩; 3.打鼓顶组上段流纹英安岩; 4.打鼓顶组下段砂岩; 5.震旦系变质岩; 6.次花岗斑岩; 7.断层; 8.火山层间离张构造; 9.地层整合、不整合界线; 10.中、小型铀矿床; 11.研究区位置
Figure 2. Schematic diagram of compound control over ore deposits of regional volcanic ring-shaped faults and subgranitic porphyry at north of Xiangshan
图 3 横涧-岗上英地区地质示意图
1.第四系; 2.碎斑熔岩; 3.流纹英安岩; 4.紫红色砂岩; 5.片岩; 6.次花岗斑岩; 7.逆、平移断层; 8.火山离张、火山塌陷构造; 9.推覆构造; 10.大、中型矿床; 11.小型矿床; 12.矿点
Figure 3. Geological sketch of Hengjian-Gangshangying area
图 4 横涧-岗上英矿床水平断面示意图
1.流纹英安岩; 2.砂岩、砂砾岩; 3.片岩; 4.逆冲推覆体; 5.次花岗斑岩; 6.断裂; 7.矿体
Figure 4. Schematic diagram of orebodies level projection in Hengjian-Gangshangying deposit
图 5 横涧-岗上英地区次花岗斑岩体空间分布
1.地表斑岩体界线; 2.-3m标高斑岩体界线; 3.-163m标高斑岩体界线; 4.一般断裂; 5.逆断层; 6.碎斑熔岩底板等高线; 7.勘探线及编号
Figure 5. Spatial distribution of subgranitic porphyry in Hengjian-Gangshangying deposit
图 6 次花岗斑岩体与铀矿化关系剖面
1.碎斑熔岩; 2.流纹英安岩; 3.紫红色砂岩; 4.石英云母片岩; 5.次花岗斑岩; 6.地质界线; 7.不整合界线; 8.铀矿体
Figure 6. Profile of relation between U-mineralization and subgranitic porphyry
图 7 控制次花岗斑岩断裂构造示意图
1.流纹英安岩; 2.紫红色砂岩; 3.片岩; 4.次花岗斑岩; 5.推测逆断层; 6.77m斑岩体界线; 7.-43m斑岩体界线; 8.-163m斑岩体界线; 9.矿井及编号; 10.勘探线及编号
Figure 7. Schematic diagram of faults controlling subgranitic porphyry
图 8 两条裂隙交叉处破碎形成的破碎带(坑道沿脉的一段)
Figure 8. Shatter zone at the infall between two fissures
图 10 坑道中主裂隙与倾向相反羽状裂隙
Figure 10. Schematic diagram of main fissures and reversed trend plumose fissures at the sap
图 11 矿区多期次矿化蚀变叠加分布
1.次花岗斑岩; 2.钠长石化; 3.铀-赤铁矿化; 4.铀-萤石化; 5.蚀变渐变界线; 6.裂隙
Figure 11. Superimposition of multi-stages mineralization and alteration in the ore zone
图 12 角砾状红化矿石示意图
1.钠长石化; 2.绿泥石化; 3.赤铁矿化及铀-赤铁矿角砾; 4.萤石化; 5.裂隙; 6.蚀变带界线
Figure 12. Sketch of brecciated structure hematitization Uranium-ore
图 13 网状裂隙控制的菱形矿体剖面
1.打鼓顶组下段紫红色砂岩; 2.次花岗斑岩; 3.赤铁矿化; 4.萤石化; 5.裂隙; 6.钻孔
Figure 13. Schematic section of diamond ore bodies controlled by network fissures
图 14 荷上村鹅湖岭组碎斑熔岩中发育的共轭剪节理
Figure 14. Conjugated shear joint growing in acidic lava in Ehuling Formation at Heshang village
图 15 张扭节理及其旁侧的羽状张节理
Figure 15. Tension-torsion joint and pinnate tension joint alongside
图 16 岗上英井下-3m中段906矿体控矿断层面
(控矿NNE向破碎带断层面见两期擦痕, 早期擦痕为近似水平左旋张扭, 晚期为沿倾向拉张正断, 反映断层经多期构造活动)
Figure 16. The fault surface controlling 906 ore-body at -3 m segment in Gangshangying sap
图 17 -43 m中段147矿体(EW-NWW)向断裂破碎带素描图
Figure 17. Sketch of EW-NWW fracture zone in Ore-body 147 at -43 m segment
表 1 横涧-岗上英地区构造演化
Table 1. Structural evolution in Hengjian-Gangshangying area
-
[1] 张万良.相山铀矿田横涧矿床的成因归属[J].地质论评, 2001, 47 (4):377~382. doi: 10.3321/j.issn:0371-5736.2001.04.007ZHANG Wan-liang.Genesis attribution of the Hengjian uranium deposit in the Xiangshan ore field, Jiangxi[J].Geological Review, 2001, 47 (4):377~382. doi: 10.3321/j.issn:0371-5736.2001.04.007 [2] 邵飞, 邹茂卿, 何晓梅, 等.相山矿田斑岩型铀矿成矿作用及深入找矿[J].铀矿地质, 2008, 24 (6):321~ 326. doi: 10.3969/j.issn.1000-0658.2008.06.001SHAO Fei, ZOU Mao-qing, HE Xiao-mei, et al.Porphyry-type uranium metallogenesis and further exploration in Xiangshan orefield[J].Uranium Geology, 2008, 24 (6):321~326. doi: 10.3969/j.issn.1000-0658.2008.06.001 [3] 张鸿.横涧-岗上英矿床多期次热液活动与铀成矿关系的探讨[J].世界核地质科学, 2008, 25 (2):68~72. doi: 10.3969/j.issn.1672-0636.2008.02.002ZHANG Hong. Discussion on relationship between uranium metallogenesis and multiperiodic hydrothermal activities in Hengjian-Gangshangying Deposit[J]. World Nuclear Geoscience, 2008, 25 (2):68~72. doi: 10.3969/j.issn.1672-0636.2008.02.002 [4] 韦昌山, 蔡明海, 蔡锦辉, 等.华南地区中生代构造控矿规律探讨[J].地质力学学报, 2004, 10 (2):113~ 121. doi: 10.3969/j.issn.1006-6616.2004.02.002WEI Chang-shan, CAI Ming-hai, CAI Jin-hui, et al.Characteristics of structural control of ore deposition in south China in the Mesozoic[J].Journal of Geomechanics, 2004, 10 (2):113~121. doi: 10.3969/j.issn.1006-6616.2004.02.002 [5] 邱爱金, 郭令智, 郑大瑜, 等.江西相山地区中、新生代构造演化对富大铀矿形成的制约[J].高校地质学报, 1999, 5 (4):418~424. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199900178521QIU Ai-jin, GUO Ling-zhi, ZHENG Da-yu, et al. Constraints of Meso-Cenozoic tectonic evolution on formation of rich and large uranium deposits in Xiangshan, Jiangxi Province[J]. Geological Journal of China Universities, 1999, 5 (4):418~424. http://www.wanfangdata.com.cn/details/detail.do?_type=perio&id=QK199900178521 [6] 邱爱金, 郭令智、郑大瑜, 等.大陆构造作用对相山富大铀矿形成的制约[M].北京:地质出版社, 2002.QIU Ai-jin, GUO Ling-zhi, ZHENG Da-yu, et al.Constraints of continental tectonism on formation of rich and large uranium deposits in Xiangshan, Jiangxi[M].Beijing:Goelogical Publishing House, 2002. [7] 陈小明, 陆建军, 刘昌实, 等.桐庐、相山火山-侵入杂岩单颗粒锆石U-Pb年龄[J].岩石学报, 1999, 15 (2):272~278. http://d.old.wanfangdata.com.cn/Periodical/ysxb98199902013CHEN Xiao-ming, LU Jian-jun, LIU Chang-shi, et al. Single grain zircon U-Pb isotopic agesof the volcanic intrusive complexes in Tonglu and Xiangshan areas[J]. Acta Petrologica Sinica, 1999, 15 (2):272~278. http://d.old.wanfangdata.com.cn/Periodical/ysxb98199902013 [8] 邵飞, 陈晓明, 徐恒力, 等.江西省相山铀矿田成矿模式探讨[J].地质力学学报, 2008, 14 (1):65~73. doi: 10.3969/j.issn.1006-6616.2008.01.006SHAO Fei, CHEN Xiao-ming, XU Heng-li, et al. Metallogenic model of the Xiangshan uranium ore field, Jiangxi Province[J]. Journal of Geomechanics, 2008, 14 (1):65~73. doi: 10.3969/j.issn.1006-6616.2008.01.006 [9] 邵飞, 陈晓明, 徐恒力, 等.相山铀矿田成矿物质来源探讨[J].东华理工大学学报(自然科学版), 2008, 31 (1):39~44. doi: 10.3969/j.issn.1674-3504.2008.01.007SHAO Fei, CHEN Xiao-ming, XU Heng-li, et al. Discussion of metallogenic substance source of Xiangshan uranium orefield[J]. Journal of East China Institute of Technology (Natural S cience), 2008, 31 (1):39~44. doi: 10.3969/j.issn.1674-3504.2008.01.007 [10] 范洪海, 王德滋, 沈渭洲, 等.江西相山火山-侵入杂岩及中基性脉岩形成时代研究[J].地质论评, 2005, 51 (1):86~91. doi: 10.3321/j.issn:0371-5736.2005.01.011FAN Hong-hai, WANG De-zi, SHEN Wei-zhou, et al.Formation age of the intermediate-basic dikes and volcanic-intrusive complex in Xiangshan, Jiangxi Province[J]. Geological Review, 2005, 51 (1):86~91. doi: 10.3321/j.issn:0371-5736.2005.01.011 [11] 邱爱金.江西相山构造-岩浆演化与富大铀矿形成[J].地质论评, 1999, 45 (增刊):761~762. http://d.old.wanfangdata.com.cn/Conference/350520QIU Ai-jin. Tectonic-magmatic evolution and formation of rich and large uranium deposits in Xiangshan, Jiangxi Province[J]. Geological Review, 1999, 45 (Supp.):761~762. http://d.old.wanfangdata.com.cn/Conference/350520 [12] ZHANG Wan-liang, LI Zi-ying. Metallogenic time-space evolution of Xiangshan uranium ore field in China[A]. In: MAO Jingwen, Bierlein F P. Mineral deposit research: Meeting the global challenge[C]. Springer Berlin Heidelberg, 2005. 339~341. doi: 10.1007/3-540-27946-6_90 -
下载:
计量
- 文章访问数: 185
- HTML全文浏览量: 146
- PDF下载量: 25
- 被引次数: 0
