-
摘要: 华北古陆的南北缘广泛分布着地球上目前已知年代最久远的早前寒武纪TTG 岩系，其地球化学特征因起源和成因的不同存在较大差异；因此，对河北怀安地区花岗闪长质片麻岩开展地球化学分析和年代学的研究工作，对认识华北古陆地壳的演化、增生和再造具有重要意义。结果表明，花岗闪长质片麻岩的结晶年龄为2 551 Ma，形成于新太古代五台旋回。岩体岩石类型主要为中细粒含紫苏花岗闪长质片麻岩，SiO2含量介于67.30%～74.94%，平均70.94%，总碱度K2O+Na2O=5.57%～8.01%，平均6.37%，A/CNK 平均1.53，属于偏铝质花岗岩。通过对该岩体构造环境分析，认为该花岗闪长质片麻岩主要形成于岩浆弧构造环境。Abstract: The northern and southern margin of the north China continent are widely distributed in the early Cambrian TTG system,which is the oldest known in the world.The geochemical characteristics of the early Cambrian rocks are quite different from the origins and Genesis.Therefore,it is of great significance to study the geochemical analysis Geochemical analysis and geochronology of granodioritic gneiss in Huai'an area,Hebei Province,and evolution,hyperplasia as well as reforger in the north China.The results show the LA-ICP-MS zircon U-Pb isotope concordia diagram age is 2 551 Ma,indicated granodiorite rock body was formed in Early Paleoproterozoic Era.Granite.The intrusion is dominated by medium grained hypersthenes Granodioritic gneiss.Their SiO2 and total alkaline contents are in the ranges of 67.30%~74.94%(average 70.94%)and 5.57%~8.01%(average 6.37%),respectively.Most of rocks belong to peraluminous(average A/CNK=1.53)granite and generated in syncollisional setting.This intrusion is formed in a magmatic arc tectonic environment.
-
Key words:
- TTG rock series /
- Huai'an, Granodioritic gneiss /
- petrology /
- geochemistry /
- chronology /
-
-
[1] 万渝生.最古老陆壳是如何形成的?[J].地球科学,2022,47(10):3776-3778.
[2] 吴鸣谦,左梦璐,张德会,等.TTG 岩套的成因及其形成环境[J].地质论评,2014,60(3):503-514.
[3] CONDIE KC.TTGs and adakites:Are they both slab melts?[J].Lithos,2005,80(1-4):33-44.
[4] 李江海,钱祥麟,侯贵廷,等.“吕梁运动”新认识[J].地球科学-中国地质大学学报,2000,25(1):15-20.
[5] 刘成如,刘立昂.“五台运动”对早前寒武纪地层划分的影响[J].华北自然资源,2022(06):58-61.
[6] 翟明国,郭敬辉,赵太平.新太古-古元古代华北陆块构造演化的研究进展[J].前寒武纪研究进展,2001,24(1):17-27.
[7] 翟明国.华北克拉通2.1-1.7 Ga地质事件群的分解和构造意义探讨[J].岩石学报,2004,20(6):1343-1354.
[8] 康健丽,王惠初,肖志斌,等.华北克拉通新太古代地壳增生:来自山西云中山地区TTG 片麻岩和二长花岗片麻岩的证据[J].岩石学报,2017,33(09):2881-2898.
[9] 冯亚洲,杨进辉在,孙金凤,等.中生代古太平洋板块俯冲诱发华北克拉通破坏的物质记录[J].中国科学:地球科学,2020,50(05):651-662.
[10] 吴昌华.华北克拉通的变质沉积岩及其克拉通的构造划分[J].高校地质学报,2007,13(3):442-457.
[11] 任云伟,张家辉,田辉,等.天镇-怀安地区新太古代末二长花岗岩的成因及动力背景[J].华北地质,2022,45(2):76-86.
[12] ZHAO G C,WILDE S A,CAWOOD P A and SUN M.Archean blocks and their boundaries in the North China Craton:Lithological,geochemical,structural and P-T path constraints and tectonic evolution[J].Precambrian Research,2001,107(1-2):45-73.
[13] ZHAO G C,CAWOOD P A,WILDE S A and SUN M.Review of global 2.1-1.8Ga orogens:Implications for a pre-Rodinia supercontinent[J].Earth-Science Reviews,2002,59(1-4):125-162.
[14] 邓晋福,吴宗絮,赵国春,等.华北地台前寒武花岗岩类、陆壳演化与克拉通形成[J].岩石学报,1999,15(2):190-198.
[15] 翟明国.华北克拉通的形成以及早期板块构造[J].地质学报,2012,96(9):1335-1349.
[16] 张健,李怀坤,田辉.华北克拉通南缘官道口群龙家园组凝灰岩SHRIMP 锆石U-Pb 年代学研究[J].华北地质,2021,44(4):1-4.
[17] 潘桂棠,肖庆辉,陆松年,等.中国大地构造单元划分[J].中国地质,2009,36(1):1-29.
[18] 耿元生,沈其韩,任留东,等.华北克拉通晚太古代末-古元古代初的岩浆事件及构造热体制[J].岩石学报,2010,26(7):1945-1966.
[19] STRECKEISEN A L.Classification of the common igneous rocks by means of their chemical composition:A provisional attempt[J].Neues Jahrbuch fur Mineralogie,Monatshefte,1976,1(1):1-15.
[20] CHAPPELL B W, WHITE A J R.Two contrasting granite types[J].Placific Geologe,1978,1(1):173-174.
[21] BOYNTON W V.Geochemistry of the rare-earth elements:Meteorite studies[J].Geochem,1984,2(1):63-114.
[22] MITTLEFEHLDT D W,MILLER C K.Geochemistry of the Sweetwater Wash Pluton,California:Implications for"anomalous" trace element behavior during differentiation of felsic magmas[J].Cosmochimica Acta,1983,47(1):109-124.
[23] DOSTAL J,CHATTERJEE A K.Origin of topaz-bearing and related peraluminous granites of the Late Devonian Davis Lake pluton,Nova Scotia,Canada:crystal versus fluid fractionation[J].Chemical Geology,1995,123(1-4):67-88
[24] PONADER C W,BROWN G E.Rare-earth elements in silicate glass melt systems,Interactions of La,Gd and Yb with halogens[J].Geochimcosmochim Acta,1989,53(11):2905-2914.
[25] OHLANDER B,BILLSTROM K,HALENIUS E.Behaviour of rare-earth elements in highly evolved granitic system:Evidence from Proterozoic molybdenite mineralized aplites and associated granites in northern Sweden[J].Lithos,1989,23(4):267-280.
[26] 韩吟文,马振东.地球化学[M].北京:地质出版社,2003,201-203.
[27] DOSTAL J,CHATTERJEE A K.Contrasting behaviour of NbTa and ZrHf ratios in a peraluminous granitic pluton(Nova Scotia,Canada)[J].Chemical Geology,2000,163(1-4):207-218.
[28] MCDONOUGH W F,SUN S S,RINGWOOD A E,et al.Potassium,rubidium,and cesium in the Earth and Moon and the evolution of the mantle of the Earth[J].Geochimica et Cosmochimica Acta,1992,56(3):1001-1012.
[29] SNY P,GOAD B E,HAWTHORNE F C,et al.Fractionation trends of the Nb-and Ta-bearing oxid minerals in the Greer Lake pegmatitic graniteand its pegmatitic aureole,southeastern Manitoba[J].Amer Mineral,1986,71(11):501-517.
[30] BATHELOR, PETER BOWDDEN.Petrogentic interpretation of granitoid rock series using multicationic parameters[J].Chemical Geology,1985,48(1-4):43-55.
[31] PEARCE J A,HARRIS N B W,TINDLE A G.Trace element discrimination diagrams for the tectonic interpretation of granitic rock[J].Petrol,1984,25(4):956-983.
[32] 郝连成,王卫国,胡延斌,等.冀西北怀安地区基底变质岩系构造变形序列研究[J].中国地质调查,2018,5(4):57-66.
[33] 刘富,郭敬辉,路孝平,等.华北克拉通2.5Ga地壳生长事件的Nd-Hf同位素证据:以怀安片麻岩地体为例[J].科学通报,2009,54(17):2517-2526.
[34] 张旗.花岗质岩浆能够结晶分离和演化吗?[J].岩石矿物学杂志,2012,31(2):252-260.
[35] WU BIN,LONG XIAOPING,ZHANG SHITAO,et al.Carboniferous variation of crustal thickness and subduction angles in Eastern Tianshan, NW China:evidence from the petrogenesis of the magmatic rocks in the Aqishan-Yamansu Belt[J].International Geology Review,2023.5(65):682-705.
[36] 侯红星,张蜀冀,胡新茁,等.华北克拉通怀安县西洋河地区高压基性麻粒岩锆石U Pb 同位素年龄及地球化学特征[J].西北地质,2022,55(4):240-254.
[37] 邹东雅,张宏福.麻粒岩和辉石岩捕虏体记录的华北克拉通下地壳破坏过程[J].中国科学:地球科学,2023,53(02):175-192.
[38] 张家辉,王惠初,田辉,等.华北克拉通怀安杂岩中“MORB”型高压基性麻粒岩的成因及其构造意义[J].岩石学报,2019,35(11):3506-3528.
[39] 初航,王惠初,魏春景,等.华北北缘承德地区高压麻粒岩的变质演化历史-锆石年代学和地球化学证据[J].地球学报,2012,33(06):977-987.
[40] 魏颖,郑建平,苏玉平,等.怀安麻粒岩锆石U-Pb年代学及Hf 同位素:华北北缘下地壳增生再造过程研究[J].岩石学报,2013,29(07):2281-2294.
[41] 郝光明,颉颃强,刘永顺,等.冀西北怀安杂岩的年代学、地球化学、Nd-Hf-O 同位素组成及其地质意义[J].地球科学,2020,45(09):3353-3371.
[42] 沈其韩,耿元生,杨崇辉,等.我国早前寒武纪地层研究的主要新进展[J].地层学杂志,2004,28(4):289-297.
[43] 王惠初,张家辉,任云伟,等.华北克拉通中北部麻粒岩带基础地质调查进展及相关问题讨论[J].华北地质,2022,45(1):18-41.
[44] 常青松,施建荣,张家辉,等.集宁地区古元古代基性麻粒岩两期变质事件的地质意义[J].华北地质,2022,45(2):68-75.
-
计量
- 文章访问数: 27
- PDF下载数: 2
- 施引文献: 0
下载: