新疆阿尔泰山东段冰碛物光释光测年研究
Optically stimulated luminescence dating of moraines in East Altay Mountains, Xinjiang
查看参考文献73篇
文摘
|
冰川是塑造地表形态最积极的外营力之一,对冰川地貌的年代学研究是重建古冰川发展史的关键,也是研究气候变化的重要途径。冰碛物是冰川作用的直接产物,代表过去发生的冰川事件,对冰碛物进行准确测年能够为重建古冰川的进退、理解区域古气候变化提供年代学支撑。本文在新疆阿尔泰山东段采集了8个冰碛物样品以进行光释光测年,利用单片再生剂量法对90~125 μm的石英颗粒进行等效剂量的测定。通过等效剂量值频率分布特征及De(t)坪区图分析得出大部分冰碛物的光释光信号晒退不彻底,所以利用一阶动力学公式对持续激发的光释光信号晒退曲线(CW-OSL)进行多组分拟合拆分,得到快速、中速、慢速3种组分,依据分离出的快速组分确定等效剂量值。研究结果显示,距今32 ka以来阿尔泰山东段区域在MIS3阶段、MIS2阶段、8.2 ka左右、全新世大暖期及新冰期等5个时段有冰川发育,冰川发育与气候变化密切相关。 |
其他语种文摘
|
The glacier is one of the most positive external forces for shaping the landscape of earth surface in alpine region. The geochronology study of glacial stratigraphy can provide insightful information about the ancient glacier process, which is sensitive to climate change. Compared to the sediments of ice lake and ice water terrace with complex material source, moraine is the direct product of glacial movement. Consequently, it can also reflect the glacier events that occurred in the past. The accurate dating of moraine can provide chronology evidence for improving the understanding of reconstruction of climate change patterns. The Altay Mountains is one of the major mountain ranges for understanding Quaternary glaciation in northwestern China. Most of the studies have focused on western Altay Mountains, Xinjiang. However, the chronology of the moraines in its eastern section is not well studied. In this study, OSL dating technique method was applied to determine the ages of the glacial moraine deposits of coarse grained quartz (90-125 μm) in the East Altay Mountains. According to analysis of the frequency distribution of De value and De(t) plots, most of the moraine samples showed partial bleaching. Therefore, the first-order kinetic equation was used to separate the CW-OSL curve into three component exponentials (fast, medium and slow components) and the fast components were used to determine these equivalent doses. The OSL dating results of moraines in East Altay Mountains deposited seperately in 32.33 ka, 16.07 ka, 8.41-8.07 ka, 6.83-6.48 ka and 4.62 ka. This implied that the glacier development process was identified with MIS3, MIS2, 8.2 ka Cold Events, Holocene Optimum and Neoglaciation, respectively. Observably, moraine can occur with glacial advance or recession during the warm or cold climate episodes, while the development of glaciers in the Altay Mountains was closely related to global climate change. This study demonstrates the successful application of quartz OSL with fast component signal to glacial sediments from the Altay Mountains. Furthermore, it can complement the geochronology data for moraine sedimentary records to reveal the glacier evolution history in the whole Altay Mountains region since 32 ka BP. |
来源
|
地理学报
,2018,73(5):957-972 【核心库】
|
DOI
|
10.11821/dlxb201805014
|
关键词
|
阿尔泰山
;
冰碛物
;
光释光测年
;
冰川作用
|
地址
|
1.
陕西师范大学地理科学与旅游学院, 西安, 710062
2.
中国人民武装警察部队黄金第八支队, 乌鲁木齐, 830057
|
语种
|
中文 |
文献类型
|
研究性论文 |
ISSN
|
0375-5444 |
学科
|
地球物理学 |
基金
|
中国博士后科学基金
;
国家自然科学基金项目
;
中国博士后科学基金
|
文献收藏号
|
CSCD:6229017
|
参考文献 共
73
共4页
|
1.
施雅风. 中国冰川对21世纪全球变暖响应的预估.
科学通报,2000,45(4):434-438
|
CSCD被引
88
次
|
|
|
|
2.
Augustin L. Eight glacial cycles from an Antarctic ice core.
Nature,2004,429(6992):623-628
|
CSCD被引
87
次
|
|
|
|
3.
Rasmussen S O. A new Greenland ice core chronology for the last glacial termination.
Journal of Geophysical Research Atmospheres,2006,111(D6):907-923
|
CSCD被引
6
次
|
|
|
|
4.
Richards B. Luminescence dating of Quaternary sediments in the Himalaya and High Asia: A practical guide to its use and limitations for constraining the timing of glaciation.
Quaternary International,2000,65(99):49-61
|
CSCD被引
12
次
|
|
|
|
5.
Hu G. Late Quaternary glacial advances in the eastern Qilianshan, north-eastern Tibet, as inferred from luminescence dating of fluvioglacial sediments.
Journal of Quaternary Science,2016,31(6):587-597
|
CSCD被引
3
次
|
|
|
|
6.
崔之久. 新疆阿尔泰山哈纳斯河流域及其邻域第四纪冰川作用.
冰川冻土,1992,14(4):342-351
|
CSCD被引
16
次
|
|
|
|
7.
李虎侯. 释光技术测定年龄的现况.
第四纪研究,1997,17(3):248-257
|
CSCD被引
6
次
|
|
|
|
8.
Xu Xiangke. OSL dating of glacier extent during the Last Glacial and the Kanas Lake basin formation in Kanas River valley, Altai Mountains, China.
Geomorphology,2009,112(3):306-317
|
CSCD被引
9
次
|
|
|
|
9.
许向科.
阿尔泰山喀纳斯河流域晚更新世冰川地貌与冰期序列测年,2010
|
CSCD被引
2
次
|
|
|
|
10.
江合理. 阿尔泰山喀纳斯河流域末次冰期OSL年代学新证.
冰川冻土,2012,34(2):304-310
|
CSCD被引
9
次
|
|
|
|
11.
江合理.
阿尔泰山喀纳斯河流域第四纪冰川演化序列:基于光释光测年技术,2012
|
CSCD被引
1
次
|
|
|
|
12.
凤骏.
遥感技术在新疆乌齐里克它乌一带1:5万区域地质矿产调查中的应用,2014
|
CSCD被引
1
次
|
|
|
|
13.
王立伦. 中国阿尔泰山的现代冰川.
地理学报,1985,40(2):142-154
|
CSCD被引
8
次
|
|
|
|
14.
屈文军. 西风带研究的重要意义.
海洋地质与第四纪地质,2004,24(1):125-132
|
CSCD被引
21
次
|
|
|
|
15.
陈发虎. 中纬度亚洲现代间冰期气候变化的"西风模式"讨论.
地学前缘,2009,16(6):23-32
|
CSCD被引
44
次
|
|
|
|
16.
Prescott J R. Cosmic ray contributions to dose rates for luminescence and ESR dating: Large depths and long-term time variations.
Radiation Measurements,1994,23(2/3):497-500
|
CSCD被引
176
次
|
|
|
|
17.
Murray A S. Luminescence dating of quartz using an improved single-aliquot regenerative-dose protocol.
Radiation Measurements,2000,32(1):57-73
|
CSCD被引
277
次
|
|
|
|
18.
Wintle A G. Luminescence sensitivity changes in quartz.
Radiation Measurements,1999,30(1):107-118
|
CSCD被引
9
次
|
|
|
|
19.
Wintle A G. A review of quartz optically stimulated luminescence characteristics and their relevance in single-aliquot regeneration dating protocols.
Radiation Measurements,2006,41(4):369-391
|
CSCD被引
106
次
|
|
|
|
20.
Galbraith R F. Statistical aspects of equivalent dose and error calculation and display in OSL dating: An overview and some recommendations.
Quaternary Geochronology,2012,11(8):1-27
|
CSCD被引
22
次
|
|
|
|
|