晚第四纪南海北部陆坡沉积物常量元素比值对气候变冷事件的指示意义

张俊; 孟宪伟; 王湘芹

doi:10.3969/j.issn.0253-4193.2013.04.013

晚第四纪南海北部陆坡沉积物常量元素比值对气候变冷事件的指示意义

doi: 10.3969/j.issn.0253-4193.2013.04.013

国家海洋局第一海洋研究所, 山东青岛 266061

基金项目: 国家自然科学基金项目--晚第四纪南海水合物潜在分布区甲烷释放通量及其对气候变化的影响(40776033);国家海洋局第一海洋研究所基本科研业务专项资金项目(2012G06)

计量
- 文章访问数: 1290
- HTML全文浏览量: 29
- PDF下载量: 1511
- 被引次数: 0
出版历程
- 收稿日期: 2012-05-23
- 修回日期: 2013-05-06

The record of major element ratios in Late Quaternary at northern slope of the South China Sea and its indicative significance on the cooling events

First Institute of Oceanography, State Oceanic Administration, Qingdao 266061, China

摘要

摘要: 南海北部陆坡柱状沉积物的常量元素统计分析表明, 沉积物中的Ti、Al、Fe、K、Mn、Mg代表了陆源元素组合;而消除粒度效应的陆源元素比值Al/Ti、Fe/Ti和K/Ti等的变化曲线与浮游有孔虫氧同位素曲线对比表明, 在气候变冷事件(Heinrich事件、Younger Dryas事件、PME斜室普林虫低值等事件)期间, 陆源常量元素比值明显降低。这一对应特征, 一方面体现了气候变冷事件的发生对陆源区化学风化强度的制约, 另一方面也说明与指示长时间尺度气候相似, 陆源元素比值对短时间尺度的气候变化也具有明显的指示作用。
- 南海北部陆坡 /
- 常量元素比值 /
- 陆源元素组合 /
- 冷事件 /
- 化学风化强度
Abstract: The statistical results of major elements in the sediments collected from northern slope of the South China Sea indicate that the terrestrial element association are Ti,Al,Fe,K,Mn,Mg. The comparison of the Ti normalized ratios of the major elements curves (such as Al/Ti、Fe/Ti and K/Ti) and planktonic foraminifera oxygen isotopic curve are presented that, during the cooling events (Heinrich event, Younger Dryas event, PME event), the terrestrial major element ratios decreased significantly. On one side, these characteristics of major elements show that the cooling events might influence the chemical weathering intensity in terrigenous area, on the other, it also plays an obvious indication role in short time scales climate changes, which is similar to indicating large time scales climate changes．
- northern slope of the South China Sea /
- major elements ratios /
- terrestrial element association /
- cooling events /
- chemical weathering intensity

HTML全文

参考文献(15)

Liu Z F, Trentesaux A, Clemens S C, et al. Clay mineral assemblages in the northern South China Sea: implications for East Asian monsoon evolution over the past 2 million years[J]. Mar Geol, 2003, 201: 133-146．

Wang L, Sarnthein M, Erlenkeuser H, et al. East Asian monsoon climate during the Late Pleistocene: high-resolution sediment records from the South China Sea[J]. Marine Geology, 1999, 156: 245-284．

Wang L J, Sarnthein M. Millennial reoccurrence of century-scale abrupt events of East Asian monsoon: A possible heat conveyor for the global deglaciation[J]. Paleoceanography, 1999, 149(6): 725-731．

Grootes P M, Stuiver M, White J W C, et al. Comparison of oxygen isotope records from the GISP2 and GRIP Greenland ice cores[J]. Nature, 1993, 366: 552-554．

Ge Q, Chu F Y, Xue Z, et al. Paleoenvironmental records from the northern South China Sea since the Last Glacial Maximum[J]. Acta Oceanologica Sinica, 2010, 29:46-62．

韦刚健, 刘颖, 邵磊, 等.南海碎屑沉积物化学组成的气候记录[J]. 海洋地质与第四纪地质, 2003, 23: 1-4．

韦刚健, 刘颖, 李献华, 等.南海沉积物中过剩铝问题的探讨[J].矿物岩石地球化学通报, 2003(1), 23-25．

Wei G J, Liu Y, Li X H, et al. Major and trace element variations of the sediments at ODP Site 1146, South China Sea, during the last 230 ka and their paleoclimate implications[J]. Palaeogeogr Palaeocl Palaeoecol, 2004, 212: 313-342．

Asahara Y, Tanaka T, Kamioka H, et al. Provenance of the north Pacific sediments and process of source material transport as derived from Rb-Sr isotopic systematics[J]. Chem Geol, 1999, 158: 271-291．

李蕙生, 孙永传. 碎屑岩沉积相和沉积环境[M]. 北京: 地质出版社, 1986: 1-280．

Wei G J, Li X H, Liu Y, et al. Geochenmical record of chemical weathering and monsoon climate change since the early Miocene in the South China Sea[J]. Paleoceanography, 2006, 21: 1-11．

Nesbitt H W, Young G M. Early Proterozoic climate and plat motions inferred from major element chemistry of lutites[J]. Nature, 1982, 299:715-717．

Weaver C E. Potassium, illite and the ocean[J]. Geochim Cosmochim Acta, 1967, 31: 2181-2196．

Nesbitt H W, Markovics G, Price R C. Chemical processes affecting alkalis and alkaline earths during continental weathering[J]. Geochim Cosmochim Acta, 1980, 44:1659-1666．

Peuraniemi V, Pulkkinen P. Preglacial weathering crust in Ostrobothnia, western Finland, with special reference to the Raudaskyla occurrence[J]. Chemical Geology, 1993, 107: 313-316．

施引文献

资源附件(0)

访问统计