石红才,谢辉,赵维娜,刘唐伟,孔德明

• 1:广东海洋大学陆架及深远海气候资源与环境广东省高等学校重点实验室
• 2:广东海洋大学海洋与气象学院
• 3:西北工业大学青岛研究院
• 4:东华理工大学理学院

摘要(Abstract)：

【目的】研究海南岛大地构造在中-新生代的隆升剥露过程与热演化史,为华南地块的构造演化提供有力证据。【方法】利用磷灰石裂变径迹(AFT)、磷灰石及锆石(U-Th)/He等构造热年代学研究方法,重建海南岛北部岩体的构造-热演化历史,分析侵入岩体在不同构造热演化阶段的冷却剥蚀速率,并进一步探讨岩体隆升过程的动力学过程。【结果】AFT年龄介于(33.3±2.5)～(45.0±3.5)Ma之间,磷灰石平均长度为(12.68±0.28)～(13.04±0.9)μm;磷灰石(U-Th)/He (AHe)单颗粒年龄(36.3±2.2)～(60.2±3.7)Ma,锆石(U-Th)/He (ZHe)单颗粒年龄为(79.5±4.9)～(98.4±6.1)Ma及(37.1±2.3)～(59.6±3.7)Ma。联合反演热史揭示,研究区岩体自晚白垩世(约100 Ma)以来的冷却过程有明显的差异性,可分为4个阶段:1)约100～45 Ma相对缓慢冷却阶段;2)约45～35 Ma快速冷却剥蚀阶段;3)约30～35 Ma至10 Ma缓慢冷却过程;4)约10 Ma以来再次快速冷却剥露。【结论】海南岛北部花岗岩体阶段性抬升冷却与(古)太平洋板块的俯冲后撤、西南部印度-欧亚大陆碰撞和中新世晚期菲律宾海板块向西俯冲挤压有关。海南岛北部在Ⅰ、Ⅱ期(始新世晚期)剥蚀阶段基本造成总剥蚀量的2/3。

关键词(KeyWords)： 海南岛;裂变径迹;(U-Th)/He;新生代;剥露过程

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(4170805,41766001,41606065);; 广东海洋大学博士启动项目(E15171);广东海洋大学海洋科学科研团队项目(002026002004)

作者(Author): 石红才,谢辉,赵维娜,刘唐伟,孔德明

参考文献(References)：

• [1]夏斌,崔学军,张宴华,等.南海扩张的动力学因素及其数值模拟讨论[J].大地构造与成矿学,2005,29(3):328-333.
• [2]REN J Y,TAMAKI K,LI S T,et al.Late Mesozoic and Cenozoic rifting and its dynamic setting in eastern China and adjacent areas[J].Tectonophysics,2002,344(3/4):175-205.
• [3]YIN A.Cenozoic tectonic evolution of Asia:A preliminary synthesis[J].Tectonophysics,2010,488(1/2/3/4):293-325.
• [4]WANG Y J,FAN W M,ZHANG G W,et al.Phanerozoic tectonics of the South China Block:Key observations and controversies[J].Gondwana Research,2013,23(4):1273-1305.
• [5]LI C F,XU X,LIN J,et al.Ages and magnetic structures of the South China Sea constrained by deep tow magnetic surveys and IODP Expedition 349[J].Geochemistry,Geophysics,Geosystems,2014,15(12):4958-4983.
• [6]SUO Y H,LI S Z,JIN C,et al.Eastward tectonic migration and transition of the Jurassic-Cretaceous Andean-type continental margin along Southeast China[J].Earth-Science Reviews,2019,196:102884.
• [7]张敏,旷健,肖志才,等.广东惠州燕山期以来地质构造演化：对华南构造的新启示[J].地球科学,2021,46(1):242-258.
• [8]SHI X B,KOHN B,SPENCER S,et al.Cenozoic denudation history of southern Hainan Island,South China Sea:Constraints from low temperature thermochronology[J].Tectonophysics,2011,504(1/2/3/4):100-115.
• [9]YAN Q S,CHEN Z H,SHI X F.A Middle Triassic extensional event in the Hainan Island:Geochronologic and geochemical evidence from igneous rocks from Dazhou Island[J].Geochemistry International,2017,55(12):1066-1078.
• [10]PE-PIPER G,PIPER D J W,WANG Y,et al.Quaternary evolution of the rivers of northeast Hainan Island,China:Tracking the history of avulsion from mineralogy and geochemistry of river and delta sands[J].Sedimentary Geology,2016,333:84-99.
• [11]JIANG X Y,LI X H.In situ zircon U-Pb and Hf-O isotopic results for ca.73 Ma granite in Hainan Island:Implications for the termination of an Andean-type active continental margin in southeast China[J].Journal of Asian Earth Sciences,2014,82:32-46.
• [12]SUN S J,ZHANG L P,ZHANG R Q,et al.Mid-Late Cretaceous igneous activity in South China:the Qianjia example,Hainan Island[J].International Geology Review,2018,60(11/12/13/14):1665-1683.
• [13]ZHOU Y,YAN Y,LIU H L,et al.U-Pb isotope geochronology of syntectonic granites from Hainan Island,South China:constraints on tectonic evolution of the eastern paleo-Tethys ocean[J].Journal of Ocean University of China,2020,19(6):1315-1330.
• [14]吕昭英,陈沐龙,傅杨荣,等.海南岛儋州地区两期A型花岗岩的岩石成因与地质意义[J].矿产与地质,2019,33(4):660-669.
• [15]朱江建,许德如,蔡建新,等.海南岛东北部侏罗纪以来应力场演化研究[J].东华理工大学学报(自然科学版),2014,37(2):101-110.
• [16]李三忠,余珊,赵淑娟,等.东亚大陆边缘的板块重建与构造转换[J].海洋地质与第四纪地质,2013,33(3):65-94.
• [17]王新毓,索艳慧,李三忠,等.华南东部陆缘新生代隆升历史及其动力学机制[J].岩石学报,2020,36(6):1803-1820.
• [18]施小斌,STEVEN Spenser,BARRY Kohn,等.海南岛南部新生代冷却历史的低温热年代学约束[C]//中国地球物理学会第二十五届年会论文集.合肥,2009:793.
• [19]REINERS P W,EHLERS T A,ZEITLER P K.1.past,present,and future of thermochronology[M]//REINERS PW,EHLERS T A,ed.Low-Temperature Thermochronology.Berlin,Boston:De Gruyter,2005:1-18.
• [20]GLEADOW A J W,KOHN B P,BROWN R W,et al.Fission track thermotectonic imaging of the Australian continent[J].Tectonophysics,2002,349(1/2/3/4):5-21.
• [21]GALLAGHER K,BROWN R,JOHNSON C.Fission track analysis and its applications to geological problems[J].Annual Review of Earth and Planetary Sciences,1998,26(1):519-572.
• [22]KETCHAM R A,DONELICK R A,CARLSON W D.Variability of apatite fission-track annealing kinetics III.Extrapolation to geological time scales[J].American Mineralogist,1999,84(9):1235-1255.
• [23]WOLF R A,FARLEY K A,KASS D M.Modeling of the temperature sensitivity of the apatite (U-Th)/He thermochronometer[J].Chemical Geology,1998,148(1/2):105-114.
• [24]REINERS P W,SPELL T L,NICOLESCU S,et al.Zircon(U-Th)/He thermochronometry:He diffusion and comparisons with 40Ar/39Ar dating[J].Geochimica et Cosmochimica Acta,2004,68(8):1857-1887.
• [25]许德如,马驰,NONNA B C,等.海南岛北西部邦溪地区奥陶纪火山-碎屑沉积岩岩石学、矿物学和地球化学:源区及构造环境暗示[J].地球化学,2007,36(1):11-26.
• [26]LI Z X,LI X H,LI W X,et al.Was Cathaysia part of Proterozoic Laurentia?-New data from Hainan Island,South China[J].Terra Nova,2008,20(2):154-164.
• [27]陈新跃,王岳军,范蔚茗,等.海南五指山地区花岗片麻岩锆石LA-ICP-MS U-Pb年代学特征及其地质意义[J].地球化学,2011,40(5):454-463.
• [28]刘松峰,李顺,聂鑫,等.海南岛东南海域碎屑锆石年代学物源示踪及构造指示意义[J].地球科学,1-19.(2021-04-21)[2021-06-10]https://kns.cnki.net/kcms/detail/42.1874.p.20210421.1316.004.html
• [29]袁晓博,方念乔,董海龙.海南岛高峰、保城地区花岗岩年代学、地球化学特征及构造意义[J].现代地质,2019,33(1):85-97.
• [30]梁飞刚.琼南晚燕山期花岗岩研究[D].北京:中国地质大学（北京）,2013.
• [31]LI X H,ZHOU H W,CHUNG S L,et al.Geochemical and Sm-Nd isotopic characteristics of metabasites from central Hainan Island,South China and their tectonic significance[J].The Island Arc,2002,11(3):193-205.
• [32]王超,魏昌欣,云平,等.海南岛五指山地区顺作花岗岩锆石U-Pb年龄、地球化学特征及其地质意义[J].地质通报,2019,38(8):1352-1361.
• [33]李廷栋,丁孝忠,肖庆辉,等.中国区域地质志:海南志[M].北京:地质出版社,2017:1-736.
• [34]李孙雄,魏昌欣,汪焰华,等.海南岛东南部吊罗山地区中深变质岩锆石U-Pb定年及其地质意义[J].大地构造与成矿学,2016,40(4):798-807.
• [35]贾小辉,王强,唐功建,等.海南屯昌早白垩世晚期埃达克质侵入岩的锆石U-Pb年代学、地球化学与岩石成因[J].地球化学,2010,39(6):497-519.
• [36]葛小月.海南岛中生代岩浆作用及其构造意义:年代学、地球化学及Sr-Nd同位素证据[D].广州:中国科学院广州地球化学研究所,2003.
• [37]云平,范渊,莫位任,等.海南岛晚中生代壳幔岩浆混合作用:来自闪长质淬冷包体的证据[J].华南地质与矿产,2003,19 (2):30-35.
• [38]XU D R,WU C J,HU G C,et al.Late Mesozoic molybdenum mineralization on Hainan Island,South China:Geochemistry,geochronology and geodynamic setting[J].Ore Geology Reviews,2016,72:402-433.
• [39]FARLEY K A,WOLF R A,SILVER L T.The effects of long alpha-stopping distances on (U-Th)/He ages[J].Geochimica et Cosmochimica Acta,1996,60(21):4223-4229.
• [40]KETCHAM R A.Forward and inverse modeling of low-temperature thermochronometry data[J].Reviews in Mineralogy and Geochemistry,2005,58(1):275-314.
• [41]FARLEY K A.(U-Th)/He dating:techniques,calibrations,and applications[J].Reviews in Mineralogy and Geochemistry,2002,47(1):819-844.
• [42]GALBRAITH R F.On statistical models for fission track counts:Reply[J].Journal of the International Association for Mathematical Geology,1981,13(6):485-488.
• [43]YAN Y,CARTER A,BIN X,et al.A fission-track and(U-Th)/He thermochronometric study of the northern margin of the South China Sea:an example of a complex passive margin[J].Tectonophysics,2009,474(3/4):584-594.
• [44]FLOWERS R M,KETCHAM R A,SHUSTER D L,et al.Apatite (U-Th)/He thermochronometry using a radiation damage accumulation and annealing model[J].Geochimica et Cosmochimica Acta,2009,73(8):2347-2365.
• [45]GUENTHNER W R.Implementation of an alpha damage annealing model for zircon (U-Th)/He thermochronology with comparison to a zircon fission track annealing model[J].Geochemistry,Geophysics,Geosystems,2021,22(2),https://doi.org/10.1029/2019 GC008757.
• [46]常健,邱楠生.磷灰石低温热年代学技术及在塔里木盆地演化研究中的应用[J].地学前缘,2017,24(3):79-93.
• [47]FITZGERALD P G,BALDWIN S L,WEBB L E,et al.Interpretation of (U-Th)/He single grain ages from slowly cooled crustal terranes:a case study from the Transantarctic Mountains of southern Victoria Land[J].Chemical Geology,2006,225(1/2):91-120.
• [48]SHUSTER D L,FLOWERS R M,FARLEY K A.The influence of natural radiation damage on helium diffusion kinetics in apatite[J].Earth and Planetary Science Letters,2006,249(3/4):148-161.
• [49]HU S B,HE L J,WANG J Y.Compilation of heat flow data in the China continental area (3rd edition)[J].Chinese Journal of Geophysics,2001,44(5):604-618.
• [50]颜丹平,周美夫,王焰,等.都龙-song chay变质穹隆体变形与构造年代:南海盆地北缘早期扩张作用始于华南地块张裂的证据[J].地球科学,2005,30(4):402-412.
• [51]闫义,夏斌,林舸,等.南海北缘新生代盆地沉积与构造演化及地球动力学背景[J].海洋地质与第四纪地质,2005,25(2):53-61.
• [52]JOLIVET L,DAVY P,COBBOLD P.Right-lateral shear along the northwest Pacific margin and the India-Eurasia collision[J].Tectonics,1990,9(6):1409-1419.
• [53]NORTHRUP C J,ROYDEN L H,BURCHFIEL B C.Motion of the Pacific plate relative to Eurasia and its potential relation to Cenozoic extension along the eastern margin of Eurasia[J].Geology,1995,23:719.
• [54]许浚远,张凌云.欧亚板块东缘新生代盆地成因：右行剪切拉分作用[J].石油与天然气地质,1999,20(3):187-191.
• [55]索艳慧,李三忠,曹现志,等.中国东部中新生代反转构造及其记录的大洋板块俯冲过程[J].地学前缘,2017,24(4):249-267.
• [56]SONG Y,STEPASHKO A A,REN J Y.The Cretaceous climax of compression in Eastern Asia:Age 87-89 Ma (late Turonian/Coniacian),Pacific cause,continental consequences[J].Cretaceous Research,2015,55:262-284.
• [57]曹建劲,胡瑞忠,刘燊,等.广东沿海地区及海南岛中新生代基性岩脉地球化学与岩石圈演化[C]//2006年全国岩石学与地球动力学研讨会论文集.南京,2006:340-341.
• [58]王二七.关于印度与欧亚大陆初始碰撞时间的讨论[J].中国科学:地球科学,2017,47(3):284-292.
• [59]梁光河.从东海和南海北部盆地群演化探讨日本大陆板块的形成过程[J].地学前缘,2020,27(1):244-259.
• [60]张族坤,徐亚军,刘强,等.华南东部白垩纪晚期-古近纪构造转换的沉积记录--以粤北南雄盆地为例[J].大地构造与成矿学,2019,43(3):575-589.
• [61]邱燕,陈国能.华南大陆边缘新生代构造地貌演化机制研究[J].地学前缘,2011,18(1):32-38.
• [62]TAYLOR B,HAYES D E.Origin and history of the South China Sea basin[M]//HAYES D E,ed.The tectonic and geologic evolution of Southeast Asian Seas and Islands:Part 2,Geophysical monograph series (Vol.27).Washington,D C:American Geophysical Union,1983:23-56.