黔北石膏洞9.9~4.2 kaBP石笋微量元素记录及环境意义

杨邦; 雷国良; 姜修洋

doi:10.3724/SP.J.1140.2014.02143

黔北石膏洞9.9~4.2 kaBP石笋微量元素记录及环境意义

福建师范大学地理科学学院, 湿润亚热带生态-地理过程教育部重点实验室, 福州 350007

基金项目:

国家自然科学基金项目(41002061)

详细信息

作者简介:
杨邦(1989-),男,硕士生,主要从事第四纪环境演变研究,E-mail:ybang1@126.com

中图分类号: P532
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出版历程
- 收稿日期: 2013-03-10
- 修回日期: 2013-05-07

9.9~4.2 kaBP STALAGMITE TRACE ELEMENTS RECORDS FROM SHIGAO CAVE, NORTHERN GUIZHOU PROVINCE AND ITS ENVIRONMENTAL SIGNIFICANCE

College of Geography Science, Fujian Normal University, Key Laboratory of Humid Subtropical Eco-geographical Process, Ministry of Education, Fuzhou 350007

摘要

摘要: 通过对黔北石膏洞一石笋(编号SG-1)进行碳氧稳定同位素测试和XRF元素扫描分析,结果表明研究时段内Mg/Ca、Sr/Ca和Ba/Ca比值都表现了较明显的阶段性变化:Mg/Ca比值在9.9~6.6 kaBP偏低,6.6~4.2 kaBP期间逐渐升高,整体变化趋势与石笋δ¹⁸O变化趋势较为一致,呈正相关关系,表明石膏洞石笋Mg/Ca比值主要受降水的影响,即降水增多(δ¹⁸O偏负),岩溶水在母岩中滞留时间短,Mg/Ca比值降低;反之则升高。Sr/Ca和Ba/Ca比值在8.7~4.2 kaBP的变化与石笋δ¹³C变化趋势一致,呈反相关关系,植被和土壤微生物活动有可能是影响石膏洞石笋Sr/Ca和Ba/Ca的主要因素。但是在9.9~8.7 kaBP,Sr/Ca和Ba/Ca比值与石笋δ¹³C关系复杂,有可能同时受到温度、降水、地表植被和上覆土壤等众多因素的影响。因此,运用Ba/Ca和Sr/Ca进行古气候研究时需要慎重,要注重多指标对比研究。
- 石笋 /
- 微量元素 /
- XRF扫描 /
- 石膏洞
Abstract: Stable isotope analysis and X-ray fluorescence core scanning have been carried out for trace elements of a ²³⁰Th dated stalagmite (No. SG-1) from the Shigao Cave of Northern Guizhou Province. The trace elements ratios of Mg/Ca, Sr/Ca, and Ba/Ca, displayed periodical changes. The Mg/Ca ratio is relatively low during 9.9~6.6 kaBP and increases gradually during 6.6~4.2 kaBP. The overall trend is correlated well with the δ¹⁸O record, suggesting that the Mg/Ca ratio is mainly subjected to the influence of precipitation. The retention time of karst water stayed in bedrock becomes shorter when precipitation increases, which will cause the decreases in the Mg/Ca ratio of the period; and vise versa. The variation tendency of Sr/Ca ratio and Ba/Ca ratio during 8.7~4.2 kaBP is corresponding to that of stalagmite δ¹³C in an opposite manner. Thus, vegetation and microbial activities in soil might be dominant factors affecting the Sr/Ca and Ba/Ca ratios. However, complicated relationship between the Sr/Ca, Ba/Ca ratios and δ¹³C occurs during 9.9~8.7 kaBP. It may be simultaneously influenced by various factors, such as temperature, precipitation, vegetation, and overlying soil. Therefore, when using the Ba/Ca and Sr/Ca ratios in the stalagmite as proxies for paleoclimate research, more emphasis should be laid on multi-proxies comparative study.
- stalagmite /
- trace elements /
- X-ray fluorescence core scanning /
- Shigao Cave

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参考文献(31)

[1]	Henderson G. Caving in to new chronologies[J]. Science, 2006, 313:620-622.
[2]	Wang Y J, Cheng H, Edwards R L, et al. A high resolution absolute-dated Late Pleistocene monsoon record from Hulu Cave, China[J]. Science, 2001, 294:2345-2348.
[3]	Yuan D X, Cheng H, Edwards R L, et al. Timing, duration and transition of the last interglacial Asian monsoon[J]. Science, 2004, 304:575-578.
[4]	Zhang P Z, Cheng H, Edwards R L, et al. A test of climate, sun, and culture relationships from an 1810-year Chinese cave record[J]. Science, 2008, 322(5903):940-942.
[5]	Cheng H, Edwards R L, Broecker W S, et al. Ice age terminations[J]. Science, 2009, 326:248-252.
[6]	Wu J Y, Wang Y J, Cheng H, et al. Stable isotope and trace element investigation of two contemporaneous annually-laminated stalagmites from northeastern China surrounding "the 8.2 ka event"[J]. Climate of the Past, 2012, 8:1497-1507.
[7]	周厚云, 王悦, 黄柳苑, 等. 氧同位素阶段5c-d时期川东北石笋Mg、Sr和Ba记录及其意义[J]. 科学通报, 2011, 56(33):2791-2796. [ZHOU Houyun, WANG Yue, HUANG Liuyuan, et al. Speleothem Mg, Sr and Ba records during the MIS 5c-d, and implications for paleoclimate change in NE Sichuan, Central China[J]. Chinese Sci.Bull., 2011, 56:3445-3450.]
[8]	Jochum K P, Scholz D, Stoll B, et al. Accurate trace element analysis of speleothems and biogenic calcium carbonates by LA-ICP-MS[J]. Chemical Geology, 2012, 318:31-44.
[9]	Dabkowski J, Limondin Lozouet N, Antoine P, et al. Climatic variations in MIS 11 recorded by stable isotopes and trace elements in a French tufa (La Celle, Seine Valley)[J].Journal of Quaternary Science,2012, 27(8):790-799.
[10]	李珊英. 洞穴石笋ICP-MS微量元素分析技术与豫西MIS 8/9时段古气候变化研究[D]. 重庆:西南大学, 2012.[LI Shanying. Determination of trace elements in stalagmites by ICP-MS and the research for paleoclim-ate reconstruction in China during MIS 8/9[D]. Chongqing:Southwest University, 2012. ]
[11]	Gascoyne M. Trace-element partition coefficients in the calcite-water system and their paleoclimatic significance in cave studies[J]. Journal of Hydrology, 1983, 61(1):213-222.
[12]	Hellstrom J C. McCulloch M T. Multi-proxy constraints on the climatic significance of trace element records from a New Zealand speleothem[J]. Earth and Planetary Science Letters, 2000, 179:287-297.
[13]	Fairchild I J, Treble P C. Trace elements in speleothems as recorders of environmental change[J]. Quaternary Science Reviews, 2009, 28:449-468.
[14]	马志邦, 李红春, 夏明,等. 距今3 ka来京东地区的古温度变化:石笋Mg/Sr记录[J]. 科学通报, 2002, 47(23):1829-1834. [MA Zhibang, LI Hongchun, XIA Ming, et al. Paleotemperature changes over the past 3000 years in eastern Beijing, China:A reconstruction based on Mg/Sr records in a stalagmite[J]. Chinese Science Bulletin, 2003, 48(4):395-400.]
[15]	李清, 王建力, 李红春, 等. 重庆地区石笋记录中Mg/Ca比值及古气候意义[J]. 中国岩溶, 2008, 27(2):145-150. [LI Qing, WANG Jianli, LI Hongchun, et al. Climatic significance of the Mg/Ca ratio from speleothems in Chongqing[J]. Carsologica Sinica, 2008, 27(2):145-150.]
[16]	黄俊华, 胡超涌, 周群峰, 等. 长江中游和尚洞石笋的高分辨率同位素、微量元素记录及古气候研究[J].沉积学报, 2002, 20(3):442-446. [HUANG Junhua, HU Chaoyong, ZHOU Qunfeng, et al. Study on high-resolution carbon, oxygen lsotope and trace element records and paleoclimate from Heshang Cave, the Middle Reach of the Yangtze Rive[J]. Acta Sedimentologica Sinica, 2002, 20(3):442-446.]
[17]	覃嘉铭, 袁道先, 程海, 等. 贵州荔波董歌洞D3石笋碳氧稳定同位素及微量元素记录的环境变化[J]. 地球学报, 2004, 25(6):625-632. [QIN Jiaming, YUAN Daoxian, CHENG Hai, et al. The stable isotope and trace element records on environmental change of D3 stalagmite in Dongge Cave, Libo, Guizhou[J]. Acta Geoscientica Sinica, 2004, 25(6):625-632.]
[18]	Johnson K R, Hu C Y, Belshaw N S, et al. Seasonal trace-element and stable isotope variations in a Chinese speleothem:The potential for high-resolution paleomonsoon reconstruction[J]. Earth and Planetary Science Letters, 2006, 244:394-407.
[19]	雷国良, 张虎才, 常凤琴, 等. 湖泊沉积物XRF元素连续扫描与常规ICP-OES分析结果的对比及校正——以兹格塘错为例[J]. 湖泊科学, 2011, 23(2):287-294. [LEI Guoliang, ZHANG Hucai, CHANG Fenqin, et al. Comparison and correction of element measurements in lacustrine sediments using X-ray fluorescence core-scanning with ICP-OES method:A case study of Zigetang Co[J]. Journal of Lake Science, 2011, 23(2):287-294.]
[20]	成艾颖, 余俊清, 张丽莎, 等. XRF岩芯扫描分析方法及其在湖泊沉积研究中的应用[J]. 盐湖研究, 2010, 18(2):7-13. [CHENG Aiying, YU Junqing1, ZHANG Lisha, et al. XRF core scanning and applications on lake sediments[J]. Journal of Salt Lake Research, 2010, 18(2):7-13.]
[21]	JIANG Xiuyang, HE Yaoqi, SHEN Chuanchou, et al. Stalagmite-inferred Holocene precipitation in northern Guizhou Province, China, and asynchronous termination of the climatic optimum in the Asian monsoon territory[J]. Chinese Science Bulletin, 2012, 57(7):795-801.
[22]	Tjallingii R, Rohl U, Kolling M, et a1. Influence of the water content on X-ray fluorescence core-scanning measurements in soft marine sediments[J]. Geochemistry, Geophysics, Geosystems, 2007, 8(2).
[23]	Wehje G, Tjallingii R. Calibration of XRF core scanners for quantitative geochemical logging of sediment cores:Theory and application[J]. Earth and Planetary Science Letters, 2008, 274(3):423-438.
[24]	Baker A, Ito E, Smart P L et al. Elevated and variable values of δ¹³C in speleothems in a British cave system[J]. Chemical Geology, 1997, 136:263-270.
[25]	姜修洋, 孔兴功, 汪永进, 等. 神农架三宝洞倒数第二次冰期高分辨率石笋δ¹³C记录[J]. 第四纪研究, 2011, 31(1):1-7. [JIANG Xiuyang, KONG Xinggong, WANG Yongjin, et al. A high resolution stalagmite δ¹³C record from Sanbao Cave over the penultimate glaciation[J]. Quaternary Sciences, 2011, 31(1):1-7.]
[26]	Genty D, Blamart D, Ghaleb B, et al. Timing and dynamics of the last deglaciation from European and North Frican δ¹³C stalagmite carbon isotope exchange processes in dynamic caves 399 profiles comparisons with Chinese and south hemisphere stalagmites[J]. Quaternary Science Reviews, 2006, 25:2118-2142.
[27]	Kong Xinggong, Wang Yongjin, WU Jiangying, et al. Complicated responses of stalagmite δ¹³C to climate change during the last glaciation from Hulu Cave, Nanjing, China[J]. Science in China(D), 2005, 48(12):2174-2181.
[28]	Katz A. The interaction of magnesium with calcite during crystal growth at 25-90℃[J]. Geochim Cosmochim Acta, 1973, 37:1563-1586.
[29]	Gascoyne M. Trace-element partition coefficients in the calite-water system and their paleoclimatic signific-ance in cave studies[J]. Journal of Hydrology, 1983, 61:213-222.
[30]	Fairchild I J, Borsato A, Tooth A F, et al. Controls on trace element (Sr-Mg) compositions of carbonate cave waters:Implications for speleothem climatic records[J]. Chemical Geology, 2000, 166:255-269.
[31]	李清. 重庆地区末次冰期以来石笋的微量元素及古气候记录研究[D]. 重庆:西南大学, 2009.[LI Qing. The Study on Trace Element of Stalagmite and Paleoclimate Reconstruction in Chongqing since the Last Glacial Period[D]. Chongqing:Southwest University, 2009.]