西秦岭北缘德乌鲁矽卡岩型铜矿床地质特征及成矿模式讨论
Geological Characteristics and Metallogenic Model of Dewulu Skarn-type Copper Deposits in West Qinling, Gansu Province
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摘要: 甘肃夏河县德乌鲁矽卡岩型铜矿床产于商丹缝合带南侧的西秦岭段。德乌鲁岩体为花岗闪长岩岩体, 并伴有同源岩浆脉动侵入形成的花岗闪长斑岩和微晶石英闪长岩, 该岩体接触带多已发生矽卡岩化, 形成透辉石石榴石矽卡岩和矽卡岩化大理岩等。岩体围岩为二叠系石关组的一套浅海相碎屑岩夹碳酸盐岩沉积。矿区主要工业矿体赋存于矽卡岩中, 多集中于侵入体岩脉穿插较复杂地段, 且无一例外的在侵入体内凹或岩枝凸出处为富矿地段。通过对资料研究, 表明德乌鲁矽卡岩富铜矿的形成是燕山期深部地壳熔融形成岩浆携带较丰富的成矿物质, 于岩体冷凝成岩过程中交代围岩形成"矽卡岩型" 和"热液型"混合铜矿。燕山期花岗闪长岩、花岗闪长斑岩(脉)、石英闪长(玢)岩、透辉石石榴子石矽卡岩及矽卡岩化大理岩发育地区, 并出现孔雀石、蓝铜矿、褐铁矿化等氧化矿物的地段, 以及伴有磁异常、铜次生晕和低电阻率异常地段,与德乌鲁铜矿区特征相似,为找矿有利地段。因此, 提出龙得岗—美武新寺地区为具有较大铜成矿潜力区, 建议加强研究和勘查工作。Abstract: The Dewulu skarn-type copper deposit is located in western Qinling of south Shangdan Suture, Gansu Province. The intrusion of Dewulu ismainly granodiorite. The impulsive intrusion of the comagmatic magma formed granodiorite porphyry and micro-crystal quartz diorite, the later metalliferous magmatic hydrothermal filled and replaced the wall rock and formed skarnization marble and diopside-garnet skarn. The main industrial orebody occurs in the skarn. Mineralization concentrated in the complex zone that intercalated by intrusive dykes. The ore shoot occurs in the cove of the intrusion or the extending area of the apophyse. During the Indosinian movement in Middle-Late Triassic, deep earth crust melted and became magma, containing abundant mineral resources. Research results show that magma of deep crust melts carried abundant metallogenic materials to replace the wall rock and make the ore mineral precipitate in the condensation and diagenetic process, forming skarn-typeand hydrothermal-type mixed copper deposit. Areaswith early Yanshanian granodiorite, granite diorite porphyry(vein), quartz diorite porphyrite and diopside-garnet skarn, skarnization marble, area containing malachite, azurite, ferritization, and other oxidized minerals, accompanied by area with magnetic anomaly, secondary halo of copper and low resistivity, are favorable prospecting places. Thus, the Longdegang-Meiwuxinsi district is considered to be a favorable area for ore prospecting.More exploration and research work should be conducted there.
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Key words:
- skarn-typecopper deposit /
- geological characteristics /
- metallogenic model /
- discussion /
- Dewulu
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杜玉良, 汤中立, 蔡克勤, 等.秦岭-祁连造山带印支-燕山期构造与大型-超大型矿床的形成关系[J]. 矿床地质, 2003.22(1):65-71.
DU Yuliang, TANG Zhongli, CAI Keqin, et al.(2003). Relationship between Indosinian- Yanshanian tectonic framework and large-superlarge mineral deposits in Qinling-Qilian orogenic belt[J]. Mineral Deposit, 22(1): 65-71(in Chinese with English abstract).
杨秉进, 鲁燕伟.甘肃老豆村及外围金多金属成矿区成矿地质特征及找矿方向[J].甘肃冶金, 2004.26(2):1-4.
YANG Bingjin, LU Yanwei.(2004).Geological characteristics and prospecting of gold and polymetallic metallogenic area in Laodou County, Gansu Province[J]. Gansu Metallurgy, 2004, 26(2):1-4(in Chinese).
姚敬金, 张素兰, 曹洛华, 等.中国主要大型有色、贵金属矿床综合信息找矿模型[M].北京:地质出版社, 2002.
YAO Jingjin, ZHANG Sulan, CAO Luohua, et al. (2002). Prospecting Model of China's major non-ferrous metals, precious metals deposit[M]. Beijing: Geological Publishing House, 2002.
张守林.矽卡岩型铜矿成矿地质环境、成矿地质特征及找矿标志[J].矿产与地质, 2001.15(5):315-319.
ZHANG Shoulin. Metallogenic environment, geological characteristics and prospecting criteria of skarn copper deposits[J]. Mineral Resources and Geology, 2001, 15(5): 315-319(in Chinese with English abstract).
余超, 余军鹏.西秦岭下拉地铅锌矿构造控矿规律及找矿应用[J].地质与勘探, 2010.46(2):261-266.
YU Chao, YU Junpeng. Structure-controlled mineralization rules and their implication to prospecting in the xialadi lead-zinc deposit, West Qinling[J]. Geology and Exploration, 2010, 46(2):261-266(in Chinese with English abstract).
曹新志, 王燕.成矿预测学的发展概况及趋势[J]. 广东有色金属地质, 1994, 1:37-41.
CAO Xinzhi, WANG Yan. On general situation and development tendency of metallogenic prediction[J]. Geology of Nonferrous Metal of Guangdong, 1994, 1:37-41(in Chinese).
陈毓川, 王平安, 秦克令, 等.秦岭地区主要金属矿床成矿系列的划分及区域成矿规律探讨[J]. 矿床地质, 1994, 13(4): 289-298.
CHEN Yuchuan, WANG pingan, QIN Keling, et al. Metallogenic series of main ore deposits and regional metallogeny in the Qinling area[J]. Mineral Deposits, 1994, 13(4): 289-298(in Chinese with English abstract).
冯守忠.吉林头道川—铁汞山金、铜多金属成矿带成矿规律及成矿模式[J]. 辽宁有色金属地质, 1993, 1～2: 47-53.
FENG Shouzhong. Metallogenic regularity of gold, copper, and polymetal deposits of Toudaochaun-Tiegongshan in Jilin [J]. Geology of Nonferrous Metal of Liaoning, 1993, 1-2: 47-53(in Chinese).
胡传久, 李亚东. 西秦岭地质构造及成矿规律探讨[J]. 甘肃地质科技情报, 1995, (3): 6-13.
HU Chuanjiu, LI Yadong. Discuss on geological structure and metalogenic regularity of Weat Qinling [J]. Gansu Information of Geological Science and Technology, 1995, (3): 6-13(in Chinese).
刘国平, 梅友松. 中国西部地区的地质构造演化与铜矿成矿规律[J]. 有色金属矿产与勘查, 1994, 3(2): 71-76.
LIU Guoping, MEI Yousong. The geotectonic evolution and copper mineralization in the western China[J]. Mineral Resources and Exploration, 1994, 3(2): 71-76(in Chinese with English abstract).
温应江. 北祁连铜矿成矿规律及找矿方向[J]. 青海地质, 1992, 1(1): 33-39.
WEN Yingjiang. Metallogenic regularity and prospecting targets of copper in north Qilian [J]. Qinghai Geology, 1992, 1(1): 33-39(in Chinese).
张守林. 矽卡岩型铜矿成矿地质环境、成矿地质特征及找矿标志[J]. 矿产与地质, 2001, 15(5): 315-319.
ZHANG Shoulin. Metallogenic environment, geological characteristics and prospecting criteria of skarn copper deposits [J]. Mineral Resources and Geology, 2001, 15(5): 315-319(in Chinese with English abstract) 殷先明.甘肃北山地区中生代A型花岗岩特征与成矿作用[J].甘肃地质, 2010, 19(4):13-19.
YIN Xianming. Characteristics of A-type granites and its mineralization in Baishan area in Gansu [J]. Gansu Geology, 2010, 19(4):13-19(in Chinese with English abstract) 刘强, 周会武. 甘肃西秦岭德乌鲁铜矿评价[R].甘肃: 甘肃省地矿局第三地质勘查院甘肃西秦岭德乌鲁铜矿评价报告, 2011.
靳晓野, 李建威, 隋吉祥.合作地区德乌鲁杂岩体的侵位时代、岩石成因及构造意义[J]. 地球科学与环境学报, 2013, 1(3): 33-39.
JIN Xiaoye, LI Jianwei, SUI Jixiang. The De wulu miscellaneous emplacement age Ofrock mass in Cooperation areas, rock formation and tectonic significance[J].Journal of Earth Science and the Environment, 2013. 1(3):33-39. 徐学义, 李婷, 陈隽璐.西秦岭西段花岗岩浆作用与成矿[J]. 西北地质, 2012, 45(4): 76-82.
XU Xueyi, LI Ting, CHEN Junlu. The west Qinling fault granitic magmatism and mineralization[J]. Northwestern Geologic, 2012.45(4):76-82.
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