1. School of Earth Science and Geological Engineering, Sun Yat-sen University, Guangzhou 510275, China 2. Department of Anthropology, University of Hawaii, 2424 Maile Way, Honolulu, HI, 96822, USA 3. Key Laboratory of Marine Mineral Resources, Guangzhou Marine Geological Survey, Ministry of Land and Resources, Guangzhou 510275, China 4. Guangdong Key Laboratory of Mineral Resources & Geological Processes, Guangzhou 510275, China
Abstract：This paper focuses on the study on continuous XRF (X-Ray Fluorescence) scanning elements of a 39 m core from Fuzhou Basin. The XRF scanning result is used to recognize the different sedimentary environment before the discussion of the element variation of different deposit in transitional zone between land and ocean. There are five sedimentary facies in the study area from the late Pleistocene: lacustrine-fluvial-estuary (mud tidal flat)-mixed tidal flat-fluvial. The XRF result from the 5 sedimentary stages shows that the high concentration of Co, Fe, Ti, Si are controlled largely by grain size. The average element intensity of layers with similar grain size indicates that Ca, Ti, Mn, Fe and Co from the marine (tidal flat) deposit is 3~10 times bigger than those from terrestrial (fluvial) deposit, with higher content of Si coinciding with terrestrial deposit. It is indicated that except grain size, the deposit environment is an important factor for element concentration. In this study, Ca, Ti, Mn, Fe and Co are relatively better indicator elements for marine sediments while Si is good and K, Rb and Sr have some indication for terrestrial sediments. The study result shows XRF continuous scanning can help to identify the subtle variation of elements, as to the determination of the sediment facies. Thus, XRF scanning is an important supplement to sediment facies identification. This study also provides an application example of XRF in a typical transitional zone between land and ocean.
[1] CHENG Ai-ying, YU Jun-qing, ZHANG Li-sha, et al(成艾颖，余俊清，张丽莎，等). Journal of Salt Lake Research(盐湖研究)，2010，18(2): 7. [2] DU De-wen, SHI Xue-fa, MENG Xian-wei, et al(杜德文，石学法，孟宪伟，等). Advances in Marine Science(海洋科学进展)，2003，21(1): 78. [3] HE Zi-ding, LIU Zhi-fei, LI Jian-ru, et al(贺子丁，刘志飞，李建如，等). Advances in Earth Science(地球科学进展)，2012，7(3): 327. [4] JIN Bing-fu, LIN Zhen-hong, JI Fu-wu, et al(金秉福，林振宏，季福武). Advances in Marine Science(海洋科学进展)，2003，21(1): 99. [5] LAN Dong-zhao, YU Yong-fen, CHEN Cheng-hui, et al(蓝东兆，于永芬，陈承惠，等). Marine Geology & Quaternary Geology(海洋地质与第四纪地质)，1986，6(3): 103. [6] LIU Jian-guo, LI An-chun, CHEN Mu-hong, et al(刘建国，李安春，陈木宏，等). Geochimica(地球化学)，2007，36(6): 559. [7] WANG Kai-fa, ZHI Chong-yuan, ZHENG Yu-long, et al (王开发，支崇远，郑玉龙，等). Acta Sedimentologica Sinica(沉积学报)，2002，20(1): 135. [8] ZHAO Yi-yang(赵一阳). Science in China·Series B(中国科学·B辑)，1993，10(10): 1084. [9] Croudace I W, Rindby A, Rothwell R G. New Techniques in Sediment Core Analysis. Geological Society of London Press, 2006. 51. [10] Haug G H, Hughenka, Sigman D M, et al. Science, 2001, 293: 1304. [11] Lamy F, Kaiser J, Ninnemann U, et al. Science, 2004, 304: 1959. [12] Liviu G, Florin F, Stefan C. Quaternary Science Reviews, 2009, 28: 1. [13] Lowemark L, Chen H F, Yang T N, et al. Journal of Asian Earth Sciences, 2010, 40: 1250. [14] Weltje G J, Tjallingii R. Earth and Planetary Science Letters, 2008, 274: 423. [15] Zong Y Q. Quaternary International, 2004, 117: 55.
