Natural attrition and growth frequency variations of stalagmites in southwest Sulawesi over the past 530,000years | |
Nick Scroxton; Michael K. Gagan; Gavin B. Dunbar; Linda K. Ayliffe; Wahyoe S. Hantoro; Chuan-Chou Shen; John C. Hellstrom; Jian-xin Zhao; Hai Cheng; R. Lawrence Edwards; Hailong Sun; Hamdi Rifai | |
刊名 | Palaeogeography, Palaeoclimatology, Palaeoecology |
2016 | |
卷号 | 441期号:Part 4页码:823-833 |
关键词 | Indonesia stalagmite Growth u–th Dating palaeoclimatology australasian Monsoon |
英文摘要 | Previous studies have analysed the age distributions of stalagmites harvested from multiple caves and inferred important palaeoclimate changes that explain stalagmite growth phases. However, stalagmites may grow over tens of thousands of years; thus, they are irreplaceable. The value of speleothems to science must be weighed against their potential and current aesthetic and cultural value. In this study, we show that some palaeoclimate information can be extracted from a cave system without the removal of stalagmites. Our case study is based on basal U–Th dates for 77 individual stalagmites from thirteen caves located in and around Bantimurung-Bulusaraung National Park, southwest Sulawesi, Indonesia. The stalagmites grew during discrete intervals within the last ~ 530,000 years, and an analysis of their age distribution shows a first-order exponential decrease in the number of older stalagmites surviving to the present day. Further, this exponential relationship is observed in stalagmite populations around the world and is therefore likely to be a general cave phenomenon. Superimposed on the first-order exponential age distribution in southwest Sulawesi are positive anomalies in stalagmite growth frequency at 425–400, 385–370, 345–335, 330–315, 160–155, 75–70 and 10–5 ka, which are typically coincident with wet periods on Borneo. To explain this distribution, we present a simple model of stalagmite growth and attrition. A first-order trend is controlled by processes intrinsic to karst systems that govern the natural attrition of stalagmites. These processes are nearly constant over time and result in the observed exponential relationship of stalagmite basal ages. Second-order variation is controlled by changes in the rate of stalagmite generation caused by fluctuating climates, which is a well-known concept in the speleothem literature. Removal of the exponential baseline allows for better assessment of relative peak heights and basic palaeoclimate information to be inferred. Importantly, the first- and second-order growth frequency variations can be characterised using basal stalagmite ages only, without the removal of stalagmites, thereby helping reduce the impact of scientific sampling on the cave environment. |
语种 | 英语 |
内容类型 | 期刊论文 |
源URL | [http://ir.gyig.ac.cn/handle/42920512-1/9640] |
专题 | 地球化学研究所_环境地球化学国家重点实验室 |
作者单位 | 1.Department of Physics, State University of Padang, Padang 25131, Indonesia 2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China 3.Institute of Global Environmental Change, Xi'an Jiatong University, Xi'an 710049, China 4.Department of Earth Sciences, University of Minnesota, Minneapolis, MN 55455, USA 5.School of Earth Sciences, University of QLD, Brisbane, QLD 4072, Australia 6.School of Earth Sciences, University of Melbourne, Parkville, VIC 3010, Australia 7.High-Precision Mass Spectrometry and Environmental Change Laboratory (HISPEC), Department of Geosciences, National Taiwan University, Taipei 10617, Taiwan, ROC 8.Research Centre for Geotechnology, Indonesian Institute of Sciences, Bandung 40135, Indonesia 9.Antarctic Research Centre, Victoria University of Wellington, Wellington 6140, New Zealand 10.Research School of Earth Sciences, The Australian National University, Canberra, ACT 0200, Australia |
推荐引用方式 GB/T 7714 | Nick Scroxton;Michael K. Gagan;Gavin B. Dunbar;Linda K. Ayliffe;Wahyoe S. Hantoro;Chuan-Chou Shen;John C. Hellstrom;Jian-xin Zhao;Hai Cheng;R. Lawrence Edwards;Hailong Sun;Hamdi Rifai. Natural attrition and growth frequency variations of stalagmites in southwest Sulawesi over the past 530,000years[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2016,441(Part 4):823-833. |
APA | Nick Scroxton;Michael K. Gagan;Gavin B. Dunbar;Linda K. Ayliffe;Wahyoe S. Hantoro;Chuan-Chou Shen;John C. Hellstrom;Jian-xin Zhao;Hai Cheng;R. Lawrence Edwards;Hailong Sun;Hamdi Rifai.(2016).Natural attrition and growth frequency variations of stalagmites in southwest Sulawesi over the past 530,000years.Palaeogeography, Palaeoclimatology, Palaeoecology,441(Part 4),823-833. |
MLA | Nick Scroxton;Michael K. Gagan;Gavin B. Dunbar;Linda K. Ayliffe;Wahyoe S. Hantoro;Chuan-Chou Shen;John C. Hellstrom;Jian-xin Zhao;Hai Cheng;R. Lawrence Edwards;Hailong Sun;Hamdi Rifai."Natural attrition and growth frequency variations of stalagmites in southwest Sulawesi over the past 530,000years".Palaeogeography, Palaeoclimatology, Palaeoecology 441.Part 4(2016):823-833. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论