Northeast Jiangxi Taqian-Fuchun Metallogenic Belt Magmatite Time Limit and Sequence Division and Its Significance
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摘要: 赣东北地区朱溪超大型铜钨矿床的发现，突破了江西境内“南钨北铜”的传统认识，引起了我国同行对朱溪铜钨矿区所在塔前—赋春成矿带的关注，重新研究塔前—赋春成矿带的地质特征是解释“南钨北扩”现象的关键所在。塔前—赋春成矿带成矿类型复杂，矿种多样，富集铜、钨、钼、金等多金属，但多与各类岩浆岩成岩作用相关。本文利用激光剥蚀电感耦合等离子体质谱（LA-ICP-MS）锆石U-Pb法对岩浆岩进行定年，探讨 “南钨北扩”的构造演化背景和物质来源的地质科学问题。系统分析表明：塔前—朱溪—赋春成矿带上至少有3期岩浆岩活动、2期成矿作用。3期岩浆岩活动分别是850 Ma的花岗闪长岩和煌斑岩脉、160 Ma花岗闪长岩和煌斑岩以及146 Ma的花岗岩；2期成矿作用分别是与160 Ma岩浆岩有关的塔前矽卡岩型钨钼矿床和月形矽卡岩型铜多金属矿床、与146 Ma花岗岩有关的朱溪矽卡岩型铜钨矿床。在收集区域已有资料的基础上，依据本次的同位素年代学研究，分析认为塔前—赋春成矿带上晋宁期的岩浆岩和燕山期成矿岩浆岩的成岩源岩一致，燕山期成矿岩浆岩是继承于晋宁期岩浆岩作用而成，而形成于145 Ma的花岗斑岩脉及细晶岩脉是勘查铜钨矿的标志。Abstract: It is a fatal challenge to the traditional cognition, which the W and Cu deposits distribute in the south and north regions of Jiangxi Province respectively, when the super Cu-W deposit in Zhuxi area was discovered recently, which attracts domestic researchers' attention and their interests in restudying geology of Taqian-Fuchun metallogenic belt in Zhuxi area that provides pivotal proofs for phenomenon of the south W deposit extends to the north region of the area. The recent discovery of the super Cu-W deposit in the Zhuxi area of northeast Jiangxi has challenged the belief that W and Cu deposits are distributed in the south and north regions of the province respectively and has led to a renewed interest in analyzing these areas again. The metallogenesis types in the Taqian-Fuchun metallogenic belt are complicated with multiple ores. For instance, Cu, W, Mo and Au are related to various igneous rocks, with some diagenesis. To address geological issues, such as the tectonic evolutional setting and ore material origins, which need to be solved urgently, the zircon U-Pb isotopic method of LA-ICP-MS was utilized and is reported in this paper in order to date the ore-related magmatic rocks. The results show that there were at least three periods of magmatism and two stages of metallogenesis in the belt. The three periods of magmatism include 850 Ma and 160 Ma granodiorites and for the lamprophyre veins, 146 Ma granites. Two stages of metallogenesis are the Taqian skarn-type W-Mo deposit and the Yuexing skarn-type Cu polymetallic deposit related to the 160 Ma granites, and the Zhuxi skarn-type Cu-W deposit related to the 146 Ma granites. Thus, considering previous regional data, the hypothesis from this study is that the ore-related magmas of Neoproterozoic and Jurassic in the belt were derived from the same magma chamber and the latter was inherited from the former. The porphyry granite and aplite veins formed in 145 Ma are the indicators of Cu-W deposit.
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表 1 塔前似斑状花岗闪长岩(ZK0702-340)LA-ICP-MS锆石U-Pb同位素测试结果
Table 1. LA-ICP-MS zircon U-Pb isotopic analysis of porphyritic granodiorite (ZK0702-340) in Taqian
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表 2 月形铜矿区花岗斑岩(YX-1)LA-ICP-MS锆石U-Pb同位素测试结果
Table 2. LA-ICP-MS zircon U-Pb isotopic analysis of the granite-porphy (YX-1) in the Yuexing copper mine
下载: 导出CSV
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[1] 杨明桂,王发宁,曾勇.江西北部金属成矿地质[M].北京:中国大地出版社,2004:1-182.
[2] 杨明桂,梅永文,周子英.罗霄—武夷隆起及郴州—上饶坳陷成矿规律及预测[M].北京:地质出版社,1998:1-312.
[3] 杨明桂,黄水保,楼法生,唐维新,毛素斌.中国东南陆区岩石圈结构与大规模成矿作用[J].中国地质,2009,36(3):528-543. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI200903006.htm
[4] 华仁民,李光来,张文兰,胡东泉,陈培荣,陈卫锋,王旭东.华南钨和锡大规模成矿作用的差异及其原因初探[J].矿床地质,2010,29(1):9-23. http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ201001004.htm
[5] Shu L S, Wang Y, Sha J G, Jiang S Y, Yu J H, Wang Y B.Jurassic sedimentary features and tectonic setting of southeastern China[J].Science in China Series D: Earth Sciences,2009,52(12):1969-1978. doi: 10.1007/s11430-009-0159-z
[6] Shu L S, Zhou X M, Deng P, Wang B, Jiang S Y, Yu J H, Zhao X X. Mesozoic tectonic evolution of the southeast China block: New insight from basin analysis[J].Journal of Asian Earth Science,2009,34:376-391. doi: 10.1016/j.jseaes.2008.06.004
[7] 江西省地质矿产局.江西省区域地质志[M].北京:地质出版社,1984:1-921.
[8] 舒良树,施央申,郭令智, Charvet J,孙岩.江南中段板块地体构造与碰撞造山运动学[M].南京:南京大学出版社,1995:1-174.
[9] 徐备,郭令智,施央申.皖浙赣地区元古代地体和多期碰撞造山带[M].北京:地质出版社,1992:1-122.
[10] 华仁民,陈培荣,张文兰,刘晓东,陆建军,林锦富,姚军明,戚华文,张展适,顾晟彦.华南中、新生代花岗岩类有关的成矿系统[J].中国科学(地球科学),2003,33(4):335-343. http://www.cnki.com.cn/Article/CJFDTOTAL-JDXK200304005.htm
[11] 毛景文,谢桂青,李晓峰,张长青,梅燕雄.华南地区中生代大规模成矿作用与岩石圈多阶段伸展[J].地学前缘,2006,11(1):45-55. http://www.cnki.com.cn/Article/CJFDTOTAL-DXQY200401002.htm
[12] 侯可军,李延河,田有荣.LA-MC-ICPMS锆石微区原位U-Pb定年技术[J].矿床地质,2009,28(4):481-492. http://cpfd.cnki.com.cn/Article/CPFDTOTAL-ZGKD201104001484.htm
[13] 万浩章,刘战庆,刘善宝,陈毓川,王成辉,陈国华,梁力杰,李赛赛.赣东北朱溪钨铜矿区花岗闪长斑岩LA-MC-ICPMS锆石U-Pb定年及其地质意义[J].岩矿测试,2014,33(待刊).
[14] 刘战庆,刘善宝,陈毓川,王成辉,万浩章,陈国华,李赛赛,梁力杰.江西朱溪铜钨矿区煌斑岩LA-MC-ICPMS锆石同位素测年及意义[J].岩矿测试,2014,33(待刊).
[15] 王先广,刘战庆,刘善宝,王成辉,刘建光,万浩章,陈国华,张诚,张树德.赣东北朱溪铜钨矿区细粒黑云母花岗岩同位素年代学及其地质意义[J].岩矿测试,2014,33(待刊).
[16] 钟玉芳,马昌前,佘振兵,林广春,续海金,王人镜,杨坤光,刘强.江西九岭花岗岩类复式岩基锆石SHRIMP U-Pb年代学[J].地球科学——中国地质大学学报,2005,30(6):685-691. http://www.cnki.com.cn/Article/CJFDTOTAL-DQKX200506004.htm
[17] 陆慧娟,华仁民,毛光周,龙光明.江西德兴泗洲辉绿岩体锆石LA-ICP-MS定年及其地质意义[J].地质学报,2006,80(7):1017-1025. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200607007.htm
[18] 孟祥金,徐文艺,杨竹森,杨竹森,侯增谦,李振清,于玉帅,肖茂章,何细荣,万浩章.江西冷水坑矿田火山-岩浆活动时限:SHRIMP锆石U-Pb年龄证据[J].矿床地质,2012,31(4):831-838. http://www.cnki.com.cn/Article/CJFDTOTAL-KCDZ201204013.htm
[19] 黄兰椿,蒋少涌.江西大湖塘钨矿床似斑状白云母花岗岩锆石U-Pb年代学、地球化学及成因研究[J].岩石学报,2012,28(12):3887-3900. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201212008.htm
[20] 陈志洪,邢广福,郭坤一,曾勇,匡福祥,贺振宇,柯学,余明刚,赵希林,张勇.长江中下游成矿带九瑞矿集区(北部)含矿岩体的锆石U-Pb定年及其地质意义[J].地质学报,2011,85(7):1146-1158. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE201107009.htm
[21] 王登红,秦燕,陈振宇,侯可军.赣南部分岩体的锆石铀-铅同位素年代学研究及其对成岩成矿机制的再认识[J].岩矿测试,2012,31(4):699-704. http://www.cnki.com.cn/Article/CJFDTOTAL-YKCS201204027.htm
[22] 陈毓川,裴荣富,张宏良,林新多,白鸽,李崇佑,胡永嘉,刘垢群,冼柏琪.南岭地区与中生代花岗岩类有关的有色及稀有金属矿床地质[M].北京:地质出版社,1989:1-508.
[23] 黄安杰,温祖高,刘善宝,刘消清,刘献满,张家菁,施光海,刘战庆.江西乐平塔前钨钼矿床辉钼矿Re-Os定年及其地质意义[J].岩石矿物学杂志,2013,32(4):1-9. http://www.cnki.com.cn/Article/CJFDTOTAL-YSKW201304007.htm
[24] 王登红,陈郑辉,黄国成,武国忠,陈芳.华南"南钨北扩"、"东钨西扩"及找矿方向探讨[J].大地构造与成矿学,2012,36(3):322-329. http://www.cnki.com.cn/Article/CJFDTOTAL-DGYK201203005.htm
[25] 水新芳,赵元艺,郭硕,吴德新,朱小云,王增科.德兴矿集区花岗闪长斑岩锆石U-Pb年龄、Hf同位素特征及其意义[J].中国地质,2012,39(6):1543-1561. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI201206005.htm
[26] 李晓峰,陈文,毛景文,王春增,谢桂青,冯佐海.江西银山多金属矿床蚀变绢云母40Ar-39Ar年龄及其地质意义[J].矿床地质,2006,26(1):1-10.
[27] 王强,孙燕,张雪辉,张世铭,王瑜亮,张春茂.江西省村前铜多金属矿床斜长花岗斑岩LA-ICP-MS锆石U-Pb年龄及其地质意义[J].中国地质,2012,39(5):1143-1150. http://www.cnki.com.cn/Article/CJFDTOTAL-DIZI201205002.htm
[28] 张家菁,梅玉萍,王登红,李华芹.赣北香炉山白钨矿床同位素年代学研究及其地质意义[J].地质学报,2008,82(7):828-832. http://www.cnki.com.cn/Article/CJFDTOTAL-DZXE200807012.htm
[29] 罗兰,蒋少涌,杨水源,赵葵东,汪石林,高文亮.江西彭山锡多金属矿集区隐伏花岗岩体的岩石地球化学、锆石U-Pb年代学和Hf同位素组成[J].岩石学报,2010,26(9):2818-2834. http://www.cnki.com.cn/Article/CJFDTOTAL-YSXB201009025.htm
[30] 赵鹏,蒋耀辉,廖世勇,周清,靳国栋.赣东北鹅湖岩体SHRIMP锆石U-Pb年龄、Sr-Nd-Hf同位素地球化学与岩石成因[J].高校地质学报,2010,16(2):218-225. http://www.cnki.com.cn/Article/CJFDTOTAL-GXDX201002009.htm
[31] 江西省地质局区域地质调查大队.1:20万乐平幅地质矿产图[R].1980:1-125.
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