Relation between Structural Deformation and Mineralization in Lala Copper Deposit, Sichuan
-
摘要:
四川拉拉铜矿是西南地区著名的大型铜矿床，矿区构造复杂，厘清矿区构造期次，能更好把握矿体的分布和演化。经资料收集、野外调查、数据统计及计算分类等，分析了矿区构造特征，并对区内构造运动矢量进行动力学反演，总结矿区构造变形特征，以此推断构造与成矿之间的关系。矿区构造以定向面理、顺层韧性滑动构造、平移断层、逆断层及正断层为主，可分为六期，主要受到NE向、SN向、EW向及NW向的作用力。其中前四期与成矿有重要影响，尤其是韧性剪切带对成矿起到至关重要的作用。
Abstract:The Lala copper deposit is a well-known large copper deposit in the southwest China. The structure of the Lala copper mine area is complex. To clarify the structural stage of the mine area can better understand the distribution and evolution of the ore body. After data collection, field survey, data statistics and calculation classification, the structural movement vector in the area is dynamically inverted, and the structural deformation characteristics of the mining area are summarized to infer the relationship between the structure and the mineralization. The structure of the mining area is dominated by directional foliation, bedding ductile sliding structure, translational faults, reverse faults and normal faults. After analysis, it can be divided into six stages, which are mainly affected by NE, SN, EW and NW directions. Among them, the first four stages have important influence on mineralization, especially the ductile shear zone plays a vital role in the mineralization.
-
Key words:
- Structural deformation /
- Mineralization /
- Lala copper deposit
-
-
表 1 六期构造的产状、性质及受力特征
Table 1. Occurrence, properties and force characteristics of the six-phase structure
序号 产状特征 构造性质 最大主应力方向 数量 期次 ① 36~58°∠52~74° 定向面理构造 NE-SW向 4 第一期 ② 72~212°∠19~41° 顺层韧性滑动构造 铅直向 5 第二期 ③ 221~285°∠61~88° 平移断层 E-W向 9 第三期 左旋平移断层 15 ④ 210~225°∠70~74° 右旋平移断层 S-N向 4 第四期 118°∠61° 左旋平移断层 1 185~195°∠71~87° F2挤压断层 2 ⑤ 116~152°∠45~85° 逆断层 NW-SE向 10 第五期 ⑥ 275°∠67° 正断层 铅直向 2 第六期 
下载: 导出CSV
-
[1] 陈良, 刘富权, 钱永超, 等. 四川会理红泥坡铜矿工艺矿物学[J]. 矿产综合利用, 2021(3):200-204. doi: 10.3969/j.issn.1000-6532.2021.03.032
CHEN L, LIU F Q, QIAN Y C, et al. Technological mineralogy of Hongnipo copper mine in Huili, Sichuan[J]. Multipurpose Utilization of Mineral Resources, 2021(3):200-204. doi: 10.3969/j.issn.1000-6532.2021.03.032
[2] 朱志敏, 曾令熙, 周家云, 等. 四川拉拉铁氧化物铜金矿床(IOCG)形成的矿相学证据[J]. 高校地质学报, 2009, 15(4):485-495. doi: 10.3969/j.issn.1006-7493.2009.04.007
ZHU Z M, ZENG L X, ZHOU J Y, et al. Mineralogical evidence for the formation of the Lala iron oxide copper-gold deposit (IOCG) in Sichuan[J]. Geological Journal of Universities, 2009, 15(4):485-495. doi: 10.3969/j.issn.1006-7493.2009.04.007
[3] 刘肇昌. 元古代会理-东川坳拉槽与川滇铜铁成矿带[J]. 矿床地质, 1994(S1):23-25. doi: 10.16111/j.0258-7106.1994.s1.011
LIU Z C. Proterozoic Huili-Aula trough of Dongchuan and Sichuan-Yunnan copper-iron metallogenic belt[J]. Geology of Mineral Deposits, 1994(S1):23-25. doi: 10.16111/j.0258-7106.1994.s1.011
[4] 周家云, 陈家彪, 沈冰, 等. 四川拉拉铜矿构造成矿动力学机制[J]. 大地构造与成矿学, 2008(1):98-104. doi: 10.3969/j.issn.1001-1552.2008.01.013
ZHOU J Y, CHEN J B, SHEN B, et al. Structural metallogenic dynamics mechanism of Lala copper deposit in Sichuan[J]. Geotectonics and Mineralization, 2008(1):98-104. doi: 10.3969/j.issn.1001-1552.2008.01.013
[5] 周家云, 朱志敏, 陈家彪, 等. 四川会理拉拉铜矿对会理-东川坳拉槽新元古代构造岩浆事件的成矿响应[J]. 沉积与特提斯地质, 2009, 29(3):84-89. doi: 10.3969/j.issn.1009-3850.2009.03.013
ZHOU J Y, ZHU Z M, CHEN J B, et al. The metallogenic response of the Huili-Lala copper deposit in Sichuan to the Neoproterozoic tectonic-magmatic event in the Huili-Dongchuan Aula trough[J]. Sedimentary and Tethys Geology, 2009, 29(3):84-89. doi: 10.3969/j.issn.1009-3850.2009.03.013
[6] ZENG M, ZHANG D, ZHANG Z, et al. Structural controls on the Lala iron-copper deposit of the Kangdian metallogenic province, southwestern China: Tectonic and metallogenic implications[J]. Ore Geol Rev, 2018, 97:35-54. doi: 10.1016/j.oregeorev.2018.04.028
[7] 张达兵, 李峰, 汪德文. 四川拉拉铜矿床断层三维可视化模型[J]. 矿产与地质, 2014, 28(4):506-510. doi: 10.3969/j.issn.1001-5663.2014.04.021
ZHANG D B, LI F, WANG D W. 3D visualization model of faults in Lala copper deposit, Sichuan[J]. Minerals and Geology, 2014, 28(4):506-510. doi: 10.3969/j.issn.1001-5663.2014.04.021
[8] 刘肇昌, 李凡友, 钟康惠, 等. 扬子地台西缘构造演化与成矿[M]. 成都: 成都电子科技大学出版社, 1996: 48-100.
LIU Z C, LI F Y, ZHONG K H, et al. Tectonic evolution and mineralization of the western margin of the Yangtze Platform [M]. Chengdu: Chengdu University of Electronic Science and Technology Press, 1996: 48-100.
[9] ZHAO X F, ZHOU M F. Fe-Cu deposits in the Kangdian region, SW China: a Proterozoic IOCG (iron-oxide-copper-gold) metallogenic province[J]. Mineralium Deposita, 2011, 46:731-747. doi: 10.1007/s00126-011-0342-y
[10] ZHU Z M, TAN H Q, LIU Y D. Late palaeoproterozoic Hekou group in Sichuan, Southwest China: geochronological framework and tectonic implications[J]. International Geology Review, 2018, 60(3):305-318. doi: 10.1080/00206814.2017.1333465
[11] ZHU Z M, TAN H Q, LIU Y D, et al. Multiple episodes of mineralization revealed by Re-Os molybdenite geochronology in the Lala Fe-Cu deposit, SW China[J]. Mineralium Deposita, 2018, 53(3):311-322. doi: 10.1007/s00126-017-0740-x
[12] CHEN W T, ZHOU M F. Paragenesis, stable isotopes, and molybdenite Re-Os isotope age of the Lala iron-copper deposit, Southwest China[J]. Economic Geology, 2012:459-480.
-
图(5)
表(1)
计量
- 文章访问数: 374
- PDF下载数: 2
- 施引文献: 0