[1]李玉松,蔡晓兵,汪 晶,等.安徽庐枞盆地黄寅冲铅锌矿床闪长玢岩锆石U-Pb年龄及其地质意义[J].华东地质,2016,37(01):19-27.[doi:10.16788/j.hddz.32-1865/P.2016.01.003]
 LI Yu-song,CAI Xiao-bing,WANG Jing,et al.Zircon U-Pb age of diorite-porphyrites of the Huangyinchong Zn-Pb deposit in the Luzong basin, Anhui Province and its geological implications[J].East China Geology,2016,37(01):19-27.[doi:10.16788/j.hddz.32-1865/P.2016.01.003]
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安徽庐枞盆地黄寅冲铅锌矿床闪长玢岩锆石U-Pb年龄及其地质意义()
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《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
37
期数:
2016年01期
页码:
19-27
栏目:
基础地质
出版日期:
2016-03-15

文章信息/Info

Title:
Zircon U-Pb age of diorite-porphyrites of the Huangyinchong Zn-Pb deposit in the Luzong basin, Anhui Province and its geological implications
文章编号:
2096-1871(2016)01-019-09
作者:
李玉松<sup>1</sup>蔡晓兵2汪 晶23岳运华2张 舒24
1.安徽省地球物理地球化学勘查技术院,合肥,230001)(2 安徽省地质调查院,合肥 230001;
3. 中国科学与技术大学地球和空间科学学院,合肥 230026;
4. 合肥工业大学资源与环境工程学院,合肥 230009
Author(s):
LI Yu-song1CAI Xiao-bing2WANG Jing23YUE Yun-hua2ZHANG Shu24
1. Institute of Geological and Geochemical prospecting Technology of Anhui Provnce, Hefei 230001,China)(2.Anhui Institute of Geological Survey, Hefei 230001, China;
3. School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, China;
4. School of Resources and Environmental Engineering, Hefei University of Technology, Hefei 230009, China
关键词:
庐枞盆地黄寅冲铅锌矿闪长玢岩锆石U-Pb定年
Keywords:
Luzong basin Huangyinchong Zn-Pb deposit diorite-porphyrite zircon U-Pb dating
分类号:
P618.4
DOI:
10.16788/j.hddz.32-1865/P.2016.01.003
文献标志码:
A
摘要:
庐枞盆地是长江中下游成矿带中最重要的铁(铜)矿集区之一,盆地内早白垩世闪长玢岩与成矿作用关系密切,但目前对庐枞盆地闪长玢岩的形成时代仍存在争议。本文对庐枞盆地内黄寅冲铅锌矿区钻孔深部的两块闪长玢岩样品进行LA-ICP-MS锆石U-Pb定年,结果显示这两块闪长玢岩样品中锆石的206Pb/238U加权平均年龄结果在误差范围内一致,分别为135±1 Ma和134.9±0.5 Ma,表明庐枞盆地内黄寅冲铅锌矿区内闪长玢岩的形成时代在135Ma左右,进一步证实了庐枞盆地可能存在一期较早的岩浆活动。该期岩浆作用形成于庐枞盆地由挤压—拉张转换的构造背景下,形成于138~132Ma之间,并在135Ma左右最为活跃,同时在庐枞盆地不同位置形成了一系列与闪长玢岩相关的铁—铜—铅—锌矿产。
Abstract:
The Luzong basin is one of the most important Fe-Cu ore concentration regions in the metallogenic belts along the middle and lower reaches of the Yangtze River. The early Cretaceous diorite-porphyrites are closely associated with metallization in the Luzong basin, but its diagenetic age is still controversial. The zircon LA-ICP-MS U-Pb dating for two diorite-porphyrite samples from deep holes in the Huangyinchong Zn-Pb deposit yielded the weighted mean 206Pb /238U ages of 135±1 Ma and 134.9±0.5 Ma, respectively, suggesting the diagenetic age of the diorite-porphyrites in the Huangyinchong Zn-Pb deposit is about 135Ma. It further confirms existence of an earlier magmatic activity in the Luzong basin, which might result from the tectonic setting from extrusion to tension during the period of 138~132Ma, with the most active period at ca. 135Ma. At the same time, a series of the Fe-Au-Zn-Pb deposits related to diorite-porphyrite were formed at different positions of the Luzong basin.

参考文献/References:

[1]常印佛,刘湘培,吴言昌,等.长江中下游铜铁成矿带[M].北京:地质出版社,1991:71-76.

[2]吕庆田,侯增谦,杨竹森,等.长江中下游地区的底侵作用及动力学演化模式:来自地球物理资料的约束[J].中国科学(D辑:地球科学),2004,34(9):783-794.
[3]董树文,张岳桥,龙长兴,等.中国侏罗纪构造变革与燕山运动新诠释[J].地质学报,2007,81(11):1449-1461.
[4]吴明安,侯明金,赵文广.安徽省庐枞地区成矿规律及找矿方向[J].资源调查与环境,2007,28(4):269-277.
[5]周涛发,范裕,袁峰,等.庐枞盆地侵入岩的时空格架及其对成矿的制约[J].岩石学报,2010,26(9):2694-2714.
[6]覃永军,曾键年,曾勇,等.安徽南部庐枞盆地罗河—泥河铁矿田含矿辉石粗安玢岩锆石LA-ICP-MS U-Pb定年及其地质意义[J].地质通报,2010,19(6):851-862.
[7]汪晶,吴明安,李小东,等.庐枞盆地早白垩世闪长玢岩锆石U-Pb年龄、地球化学特征及其成矿指示意义[J].地质学报,2014,88(4):547-561.
[8]汤家富,陆三明,李建设,等.安徽庐枞火山岩盆地与邻区基底构造变形、形成演化及其对矿床分布的控制[J].岩石学报,2010,26(9):2587-2597.
[9]任启江,王德滋,徐兆文,等.安徽庐枞火山-构造洼地的形成、演化及成矿[J].地质学报,1993,67(2):131-145.
[10]曹毅.安徽庐枞地区中生代A型花岗岩类及其岩石包体研究[D].北京:中国地质大学,2008.
[11]LIU Yongsheng, ZONG Keqing, Kelemen P B. Geochemistry and magmatic history of eclogites and ultramafic rocks from the Chinese continental scientific drill hole:subduction and ultrahigh–pressure metamorphism of lower crustal cumulates[J]. Chemical Geology, 2008, 247(1/2): 133-153.
[12] LIU Yongsheng,GAO Shan, HU Zhaochu. Continental and oceanic crust recycling-induced melt-peridotite interactions in the Trans-North China Orogen:U-Pb dating. Hf isotopes and trace elements in zircons from mantle xenoliths[J]. Journal of Petrology, 2010, 51(1/2): 537-571.
[13]LIU Yongsheng, HU Zhaochu, ZONG Keqing, et al. Reappraisement and refinementof zircon U-Pb isotope and trace element analyses by LA-ICP-MS[J]. Chinese Science Bulletin, 2010, 55(15): 1535-1546.
[14]Belousova E, Griffin W, O’reilly S Y, et al. Igneous zircon: trace element composition as an indicator of source rock type[J]. Contributions to Mineralogy and Petrology, 2002, 143(5): 602-622.
[15]Hoskin P, Schaltegger U. The composition of zircon and igneous and metamorphic petrogenesis[J]. Reviews in Mineralogy and Geochemistry, 2003, 53(1): 27-62.
[16]江满容.安徽庐江泥河铁矿矿床地质特征及成矿规律研究[D].北京:中国地质大学,2011.
[17]周涛发,宋明义,范裕,等.安徽庐枞盆地中巴家滩岩体的年代学研究及其意义[J].岩石学报,2007,23(10):2379-2386.
[18]谢智,李全忠,陈江峰,等.庐枞早白垩世火山岩的地球化学特征及其源区意义[J].高校地质学报,2007,13(2):235-249.
[19]周涛发,范裕,袁峰.长江中下游成矿带成岩成矿作用研究进展[J].岩石学报,2008,24(8):1665-1678.
[20]曾键年,覃永军,郭坤一,等.安徽庐枞盆地含矿岩浆岩锆石U-Pb年龄及其对成矿时限的约束[J].地质学报,2010,84(4):466-478.
[21]邓晋福,刘翠,冯艳芳,等.安徽省庐枞与滁州盆地火山岩岩石学特征与Fe-Cu成矿的关系[J].地质学报,2011,85(5):626-635.
[22]杜杨松,曹毅,袁万明,等.安徽沿江地区中生代碰撞后到造山后岩浆活动和壳幔相互作用——来自火山—侵入杂岩和岩石包体的证据[J].岩石学报,2007,23(6):1294-1302.
[23]刘珺,周涛发,袁峰,等.安徽庐枞盆地中巴家滩岩体的岩石地球化学特征及成因[J].岩石学报,2007,23(10):2615-2622.
[24] WANG Qiang, BAO Zhiwei, XU Jifeng, et al. Petrogenesis of Cretaceous adakitic and shonitic igneous rocks in the Luzong area,Anhui Province(eastern China);Implications for geodynamics and Cu-Au mineralization[J]. Lithos, 2006, 89: 424-446.
[25]张乐骏.安徽庐枞盆地成岩成矿作用研究[D].合肥:合肥工业大学,2011.
[26]毛景文,Stein H, 杜安道,等.长江中下游地区铜金(钼)矿Re-Os年龄测定及其对成矿作用的指示[J].地质学报,2004,78(1):121-131.
[27]董树文,马立成,刘刚,等.论长江中下游成矿动力学[J].地质学报,2011,85(5):612-625.
[28]孟祥金,吕庆田,杨竹森,等.长江中下游铜陵及邻区中生代中酸性侵入岩地球化学特征及其深部岩浆作用探讨[J].地质学报,2011,85(5):757-777.[29]陈津华,曾键年,王思源,等.宁芜和庐枞火山岩盆地玢岩铁矿矿床地球化学特征及其成矿动力学背景探讨[J].地质科技情报,2012,31(1):86-94.
[30]范裕,周涛发,郝麟,等.安徽庐枞盆地泥河铁矿床成矿流体特征及其对矿床成因的指示[J].岩石学报,2012,28(10):3113-3124.

备注/Memo

备注/Memo:
基金项目:中国地质调查局地质调查项目(项目编号:12120114038001、1212011120862、12120113069600)和安徽省地勘局地质科研项目(项目编号:KJ2014-02)联合资助。
第一作者简介:蔡晓兵,1968年生,男,高级工程师,硕士,矿产地质勘查专业,从事地质矿产勘查、研究和技术管理工作。
更新日期/Last Update: 2016-03-30