[1]杨 彪,王正其,肖金根,等.安徽黄梅尖地区基性岩脉K-Ar年代学、地球化学特征及地质意义[J].华东地质,2020,41(01):27-35.[doi:10.16788/j.hddz.32-1865/P.2020.01.004]
 YANG Biao,WANG Zheng-qi,XIAO Jin-gen,et al.K-Ar chronology and geochemistry of mafic dikes in the Huangmeijian area, Anhui and their geological significances[J].East China Geology,2020,41(01):27-35.[doi:10.16788/j.hddz.32-1865/P.2020.01.004]
点击复制

安徽黄梅尖地区基性岩脉K-Ar年代学、地球化学特征及地质意义()
分享到:

《华东地质》[ISSN:2096-1871/CN:32-1865/P]

卷:
41
期数:
2020年01期
页码:
27-35
栏目:
基础地质
出版日期:
2020-03-30

文章信息/Info

Title:
K-Ar chronology and geochemistry of mafic dikes in the Huangmeijian area, Anhui and their geological significances
文章编号:
2096-1871(2020)01-027-09
作者:
杨 彪1王正其2肖金根1曹达旺1
(1.安徽省核工业勘查技术总院,芜湖 241000; 2.东华理工大学,南昌 330013)
Author(s):
YANG Biao1 WANG Zheng-qi2 XIAO Jin-gen1CAO Da-wang1
(1.Anhui Nucler Exploration Techonlogy Central Institute, Wuhu 241000, China; 2.East China University of Technology, Nanchang 330013, China)
关键词:
辉绿玢岩 地球化学特征 K-Ar年代学 Sr-Nd同位素 黄梅尖地区 安徽
Keywords:
diabase porphyrite geochemistry K-Ar age Sr-Nd isotopes Huangmeijian area Anhui
分类号:
P588.12+4
DOI:
10.16788/j.hddz.32-1865/P.2020.01.004
文献标志码:
A
摘要:
在野外地质调查和室内综合研究的基础上,通过对黄梅尖地区辉绿玢岩K-Ar年代学、地球化学和Sr-Nd同位素特征进行研究,探讨辉绿玢岩的形成时代、岩石成因及构造背景。K-Ar年代学研究表明,辉绿玢岩形成于~107 Ma,是早白垩世岩浆活动的产物,形成时代晚于该地区火山岩和侵入岩,与该地区铀成矿年龄基本一致; 辉绿玢岩的侵入可能是该地区岩浆作用的最后一幕,铀成矿可能与辉绿玢岩具有成因联系。地球化学特征表明,辉绿玢岩富集大离子亲石元素K、Rb、U、Pb和轻稀土元素,亏损高场强元素Nb、Ta、P、Ti,具有较高的Isr值和负εNd(t)值,具有富集地幔源区特征; 辉绿玢岩是在地壳伸展和岩石圈减薄的构造背景下,由俯冲交代作用形成的富集地幔部分熔融形成的,表明~107 Ma时该地区仍处于伸展构造环境下。
Abstract:
On the basis of field geological survey and indoor comprehensive analysis, this study discussed ore-forming age, genesis and tectonic setting of diabase porphyrite of Huangmeijian pluton in the Huangmeijian area using K-Ar chronology, geochemistry and Sr-Nd isotope geochemistry. K-Ar dating results show that the diabase porphyrite formed in ~107 Ma and should be the product of the early Cretaceous magmatic activity. The diabase porphyrite formed later than volcanic rocks and intrusive rocks in the area, but is consistent with that of U mineralization, indicating that the emplacement of diabase porphyrite was likely the last stage of magmatism and uranium mineralization may be genetically related to the diabase porphyrite. Geochemical characteristics indicate that the diabase porphyrite is rich in potassium, large ion lithophile elements(K, Rb, U and Pb)and light rare earth elements, and the loss of high field intensity elements(Nb, Ta, P and Ti), with high Isr and negative εNd(t)value, suggesting characteristic of mantle-enriched source. The diabase porphyrite was formed from partial melting of enriched mantle due to subduction metasomatism under the tectonic background of crustal extension and lithospheric thinning, indicating that the region was still in an extensional tectonic environment at ~107 Ma.

参考文献/References:

[1] HOEK J D, SEITZ H M. Continental mafic dyke swarms as tectonic indicators:An example from the Vestfold Hills,East Antarctica[J].Precambian Research,1995,75(3/4):121-139.

[2] 曹豪杰,黄乐真,沈渭洲,等.粤北牛岱辉绿岩脉的地球化学特征及其成因研究[J].东华理工大学学报: 自然科学版,2011,34(4):323-331.
[3] 王学成.华南产铀花岗岩体内暗色岩脉的成因及其与铀成矿关系研究[D].南京:南京大学,1989.
[4] 杜乐天.中国热液铀矿基本成矿规律和一般热液成矿学[M].北京:原子能出版社,2001:1-305.
[5] 夏宗强,李建红.桃山—诸广山成矿带晚中生代以来的中基性岩脉特征及其与铀成矿关系[A].中国核科学技术进展报告——中国核学会2009年学术年会论文集(第一卷·第1册)[C].2009:107-113.
[6] 徐争启,程发贵,唐纯勇,等.广西大新地区辉绿岩地质地球化学、年代学特征及其意义[J].地球科学进展,2012,27(10):1080-1086.
[7] 余中美.摩天岭岩体脉岩地质地球化学与年代学特征及其与铀成矿关系[D].成都:成都理工大学,2012.
[8] 王勇剑.相山花岗斑岩和中基性脉岩特征及其与铀成矿关系[D].北京:核工业北京地质研究院,2015.
[9] 朱杰辰.大龙山、昆山富铀形成地质条件及成因的同位素地质研究[R].北京:北京第三研究所,1989:1-134.
[10] 陈一峰.庐枞地区铀成矿规律探讨[J].铀矿地质,1994,10(4):193-202.
[11] 郑永飞,傅斌,龚冰.安徽黄梅尖岩体热历史及其与成矿关系:同位素证据[J].地质学报,1995,69(4):337-348.
[12] 陈一峰,马昌明,樊焕新.庐枞地区铀成矿的区域地质背景研究[J].铀矿地质,1996,12(2):75-82.
[13] 史春旺,杨彪.安徽省黄梅尖碱性岩体铀成矿地球化学特征[J].铀矿地质,2016,32(1):7-12.
[14] 邬宗玲,盛勇,黄博,等.安徽庐枞火山岩矿集区东南部成矿系列及成矿规律[J].华东地质,2017,38(3):194-202.
[15] 翟建平,徐光平,章邦桐,等.庐枞火山岩系与偏碱性石英正长岩带的同源特征及成因探讨[J].地质论评,1999,35(增刊):707-711.
[16] 范裕,周涛发,袁峰,等.安徽庐江-枞阳地区A型花岗岩的LA-ICP-MS定年及其地质意义[J].岩石学报,2008,24(8):1715-1724.
[17] 李玉松,蔡晓兵,汪晶,等.安徽庐枞盆地黄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(1):19-27.
[18] 李洪英,张荣华,胡书敏.庐枞盆地正长岩类地球化学特征及成因探讨[J].吉林大学学报(地球科学版),2009,39(5):839-848.
[19] 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.
[20] 徐祥,邢凤鸣.安徽沿江地区中生代基性岩稀土元素地球化学特征[J].安徽地质,1996,9(2):81-89.
[21] 闫峻,陈江峰,喻钢,等.长江中下游晚中生代中基性岩的铅同位素特征:富集地幔的证据[J].高校地质学报,2003,9(2):195-206.
[22] 李莉.安徽铜陵地区基性岩特征及成因[D].北京:中国地质大学(北京),2010.
[23] MIDDLEMOST E A K. Naming materials in the magma/igneous rock system[J].Earth Science Reviews,1994,37(3/4):215-224.
[24] SUN S S,MCDONOUGH W F. Chemical and isotopic systematic of oceanic basalts:Implications for mantle composition and processes. [J].Geological Society Special Publications, 1989,42(1):313-345.
[25] ZINLDER A, HART S R. Chemical Geodynamics[J].Annual Review of Earth and Planetary Sciences,1986,14(1):493-571.
[26] DUPRE B, ALLEGRE C J. Pb-Sr isotop variation in Indian Ocean basalts and mixing phenomen[J]. Nature,1983,303(5913):142-146.
[27] ROGERS N W. Potassic magmatism as a key to trace-element enrichment procrsses in the upper mantle[J]. Journal of Volcanology and Geothermal Research,1992,50(1):85-99.
[28] RUDNICK R L, FOUNTAIN D M. Nature and composition of the continental crust:A lower crustal perspective[J].Reviews of Geophysics,1995,33(3):267-309.
[29] BRIQUEU L, BOUGAULT H, JORON J L.Quantification of Nb,Ta,Ti and V anomalies in magmas associated with subduction zones: Petrogenetic implica-tions[J].Earth and Planetary Science Letters,1984,68(2):297-308.
[30] ARNDT N T, CHRISTENSEN U. The role of lithospheric mantle in continental flood volcanism:Therma and geochemical constraints[J].Journal of Geophysical Research Solid Earth,1992,97(B7):10967-10981.
[31] 李曙光,杨蔚.大别山带深部地缝合线与地表地缝合线的解耦及大陆碰撞岩石圈楔入模型:中生代幔源岩浆岩 Sr-Nd-Pb同位素证据[J].科学通报,2002,47(24):1898-1905.
[32] 周涛发,范裕,袁峰,等.安徽庐枞(庐江—枞阳)盆地火山岩的年代学及其意义[J].中国科学(D辑:地球科学),2008,38(11):1342-1353.
[33] 吴福元,葛文春,孙德有,等.中国东部岩石圈减薄研究中的几个问题[J].地学前缘,2003,10(3):51-60.
[34] MESCHEDE M. A method of discriminating between different types of mid-ocean ridge basalts and continental tholeiites with the Nb-Zr-Y diagram[J].Chemical Geology,1986,56(3/4):207-218.
[35] 汪云亮,张成江,修淑芝.玄武岩类形成的大地构造环境的Th/Hf-Ta/Hf图解判别[J].岩石学报,2001,17(3):413-421.
[36] 邹茂卿,刘文民,陈贵华,等.庐枞盆地富铀矿地质特征[R].芜湖:华东地勘局二七〇研究所,1991:1-98.
[37] 刘洪,邱检生,罗清华,等.安徽庐枞中生代富钾火山岩成因的地球化学制约[J].地球化学,2002,31(2):129-140.
[38] 贾丽琼,徐文艺,吕庆田,等.庐枞盆地砖桥地区科学深钻岩浆岩LA-MC-ICP MS锆石U-Pb年代学和岩石地球化学特征[J].岩石学报,2014,30(4):995-1016.
[39] 刘惠华,杨彪,王正其,等.安徽省枞阳县黄梅尖及邻区铀成矿条件和找矿预测[R].芜湖:安徽省核工业勘查技术总院,2015:1-128.

相似文献/References:

[1]陶春军,贾十军,陈富荣,等.安徽北淮阳沙坪沟钼矿区水系沉积物粒级试验研究[J].华东地质,2017,38(01):58.[doi:10.16788/j.hddz.32-1865/P.2017.01.008]
 TAO Chun-jun,JIA Shi-jun,CHEN Fu-rong,et al.Experimental study of granularity for stream sediments of the Shapinggou molybdenum deposit, Northern Huaiyang, Anhui[J].East China Geology,2017,38(01):58.[doi:10.16788/j.hddz.32-1865/P.2017.01.008]
[2]王庆喜,吴 迪,吕志平,等.辽宁连山关地区混合花岗岩岩石地球化学特征及构造环境[J].华东地质,2017,38(02):108.[doi:10.16788/j.hddz.32-1865/P.2017.02.004]
 WANG Qing-xi,WU Di,Lü Zhi-ping,et al.Geochemical characteristics and tectonic environment of migmatitic granites in the Lianshanguan area, Liaoning Province[J].East China Geology,2017,38(01):108.[doi:10.16788/j.hddz.32-1865/P.2017.02.004]
[3]杨世学,张靖怡,张赞赞,等.安徽庐江泥河铁矿床赋矿闪长玢岩地球化学特征研究[J].华东地质,2017,38(04):241.[doi:DOI:10.16788/j.hddz.32-1865/P.2017.04.001]
 YANG Shi-xue,ZHANG Jing-yi,ZHANG Zan-zan,et al.Geochemical characteristics of ore-bearing diorite porphyrite of the Nihe iron ore deposit in Lujiang, Anhui Province[J].East China Geology,2017,38(01):241.[doi:DOI:10.16788/j.hddz.32-1865/P.2017.04.001]
[4]范飞鹏,肖惠良,陈乐柱,等.粤东新寮岽矿区成矿闪长岩类SHRIMP 锆石U-Pb年龄、地球化学特征及地质意义[J].华东地质,2018,39(04):279.[doi:10.16788/j.hddz.32-1865/P.2018.04.005]
 FAN Fei-peng,XIAO Hui-liang,CHEN Le-zhu,et al.SHRIMP zircon U-Pb dating and geochemistry of metallogenic dioritoids in the Xinliaodong copper-polymetallic ore district, eastern Guangdong Province, and their geological significance[J].East China Geology,2018,39(01):279.[doi:10.16788/j.hddz.32-1865/P.2018.04.005]
[5]罗 坤,黎敦朋,肖爱芳,等.福建李坊重晶石矿床硅质岩地球化学特征及其构造背景[J].华东地质,2019,40(03):216.[doi:10.16788/j.hddz.32-1865/P.2019.03.007]
 LUO Kun,LI Dun-peng,XIAO Ai-fang,et al.Geochemical characteristics of the siliceous rocks in the Lifang barite deposit, Fujian Province, and its implications for tectonic settings[J].East China Geology,2019,40(01):216.[doi:10.16788/j.hddz.32-1865/P.2019.03.007]
[6]肖 林,程招勋,都士卓,等.乌兰浩特地区中性火山岩LA-ICP-MS锆石U-Pb年龄、地球化学特征及成因探讨[J].华东地质,2019,40(04):253.[doi:10.16788/j.hddz.32-1865/P.2019.04.002]
 XIAO Lin,CHENG Zhao-xun,DU Shi-zhuo,et al.LA-ICP-MS zircon U-Pb age, geochemistry and genesis of intermediate volcanic rocks in the Ulanhot area, Inner Mongolia[J].East China Geology,2019,40(01):253.[doi:10.16788/j.hddz.32-1865/P.2019.04.002]

备注/Memo

备注/Memo:
*收稿日期:2018-11-07 修订日期:2019-03-13 责任编辑:谭桂丽
基金项目:安徽省国土资源厅“安徽省枞阳县黄梅尖及邻区铀成矿条件和找矿预测(编号:2012-K-2)”项目资助。
第一作者简介:杨彪,1988年生,男,工程师,主要从事地质调查与矿产勘查工作。
更新日期/Last Update: 2020-03-30