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洞穴次生碳酸盐沉积的Sr同位素组成研究:历史与前景 被引量:2

Study on strontium isotope from speleothem: past and future
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摘要 对洞穴次生碳酸盐沉积87Sr/86Sr比值的研究进行了回顾,对其潜在的应用前景作了展望。87Sr/86Sr是进行沉积物来源示踪的重要地球化学指标之一。在以往的研究中,根据洞穴次生碳酸盐沉积87Sr/86Sr的变化对一些可能的Sr来源的相对贡献进行了研究,并进一步对其蕴涵的气候环境演化意义进行了探讨。在未来的研究中,示踪物源仍然将是洞穴沉积87Sr/86Sr研究的主要功能。这一指标可能在对地表土壤的化学风化强度及其变化、东亚地区的大气粉尘活动和冬季风演化、岩溶地下水古水文演化研究等方面发挥重要作用。 In this paper, the investigations on strontium isotope (^87Sr/^86Sr) from speleothem are reviewed and potential application of speleothem ^87 Sr/^86Sr for global change research is prospected. The index ^87 Sr/^86Sr is a commonly used geochemical proxy for tracing back sediment source. In the past studies, changes in speleothem ^87 Sr/^86Sr is used as an indicator of variations of relative contribution of various Sr sources, and in turn as a reflection of changes in paleoclimate and paleoenvironment. In the future, investigations on speleothem ^87Sr/^86Sr may play an important role in the following fields: chemical weathering of the surface soil and its variations, atmospheric dust activity in the East Asia and winter monsoon variations, paleo-hydrology of karstic groundwater, and so on.
出处 《中国岩溶》 CAS CSCD 北大核心 2007年第1期18-23,共6页 Carsologica Sinica
基金 国家自然科学基金项目(40672120) 中科院知识创新工程重要方向项目(KZCX3-SW-152) 国家自然科学基金重点项目(40331009) 中科院地化所创新项目(GIGCX-04-01)
关键词 洞穴次生碳酸盐沉积 ^87Sr/^86Sr 古气候环境 应用 Speleothem ^87Sr/^86Sr Paleoclimate and paleoenvironment Application
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