Three Holocene and late Pleistocene glacial stages inferred from moraines in the Lingshi and Thanza village areas, Bhutan
Three Holocene and late Pleistocene glacial stages inferred from moraines in the Lingshi and Thanza village areas, Bhutan
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DOI：
10.1016/s1040-6182(02)00052-6
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发表时间：
2002
影响因子：
2.2
通讯作者：
S. Iwata;C. Narama
中科院分区：
文献类型：
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作者：
S. Iwata;C. Narama
不丹西北部灵石地区山谷冰川形成的冰碛物可划分为三个不同的阶段，其空间分布、大小以及碎屑、土壤和植被等表面特征存在明显差异。不丹北方坦扎村地区的冰碛物具有三个阶段，其特征与灵石地区的冰碛物相似。使用形态地层学标准，这三个阶段与尼泊尔东部的昆布冰川的一些冰川阶段相关。从昆布海隆冰碛物中提取的日期提供了这三个阶段的初步时间顺序。不丹的山谷冰川在以下时期扩张：（1）Takaphu和Raphsthreng阶段是小冰期和晚全新世冰川前进;（2）Jykhuje和Tenchey阶段代表晚冰期和/或早全新世冰川前进;（3）Lingshi Dzong和Lunana阶段与末次冰期一致。
Moraines formed by valley glaciers in Lingshi area, northwestern Bhutan constitute three distinct stages with contrasts in the spatial distribution and size of moraines, and surface features such as clasts, soils and vegetation. Moraines in the Thanza Village area, northern Bhutan, show three stages with similar characteristics to those in the Lingshi area. Using morphostratigraphic criteria, these three stages correlate with some glacial stages in the Khumbu Himal, eastern Nepal. Dates from moraines in the Khumbu Himal provide a tentative chronological sequence of these three stages. Valley glaciers in Bhutan expanded during the following periods: (1) the Takaphu and Raphsthreng Stages are the Little Ice Age and late Holocene glacial advances; (2) the Jykhuje and Tenchey Stages represent the Late Glacial and/or early Holocene glacial advances; and (3) the Lingshi Dzong and Lunana Stages are coincident with the Last Glacial period.