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Minimum Bedrock Exposure Ages and Their Implications:Larsemann Hills and Neighboring Bolingen Islands,East Antarctica

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Acta Geologica Sinica(English Edition) 2010年第3期84卷 543-548页

作者： HUANG Feixin LI Guangwei LIU Xiaohan KONG Ping JU Yitai david fink FANG Aimin YU Liangjun Institute of Mineral Resources Research China Metallurgical Geology Bureau Beijing 100025 China Institute of Tibetan Plateau Research Chinese Academy of Sciences Beijing 100085 China Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Australian Nuclear Science and Technology Organization Menai NSW 2234 Australia Graduate University of the Chinese Academy of Sciences Beijing 100049 China

Considerable controversy exists over whether or not extensive glaciation occurred during the global Last Glacial Maximum（LGM） in the Larsemann *** this study we use the in situ produced cosmogenic nuclide ^（10）Be（half life 1.51 Ma） to provide minimum exposure ages for six bedrock samples and one erratic boulder in order to determine the last period of deglaciation in the Larsemann Hills and on the neighboring Bolingen *** bedrock samples taken from Friendship Mountain（the highest peak on the Mirror Peninsula,Larsemann Hills;～2 km from the ice sheet） have minimum exposure ages ranging from 40.0 to 44.7 *** erratic boulder from Peak 106（just at the edge of the ice sheet） has a younger minimum exposure age of only 8.8 *** minimum exposure ages for two bedrock samples from Blundell Peak（the highest peak on Stornes Peninsula,Larsemann Hills;～2 km from the ice sheet） are about 17 and 18 *** the Bolingen Islands（southwest to the Larsemann Hills;～10 km from the ice sheet）,the minimum exposure age for one bedrock sample is similar to that at Friendship Mountain（i.e.,44 ka）.Our results indicate that the bedrock exposure in the Larsemann Hills and on the neighboring Bolingen Islands commenced obviously before the global LGM（i.e.,20-22 ka）,and the bedrock erosion rates at the Antarctic coast areas may be obviously higher than in the interior land.

关键词： east Antarctica Larsemann Hills Bolingen Islands 1~Be exposure age erosion rate

Dip-slip rate determined by cosmogenic surface dating on a Holocene scarp of the Daju fault,Yunnan,China

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Dip-slip rate determined by cosmogenic surface dating on a H...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： david fink Institute for Environmental Research Australian Nuclear Science and Technology Organisation Menai NSW2234 Australia

The Daju and Lijiang-Daju fault zones which bound the Yulong Mountains on its northern and eastern perimeters,respectively,are segments of a continuous fault system that bends at *** of the Yulong Mountains,the southernmost glacierized mountain range in Eurasia,resulted from the normal faulting characteristics of the fault *** cosmogenic surface exposure dating with Be and Al,we have measured bedrock exposure ages as a function of elevation along an exposed bedrock scarp of the Daju fault. Be and Al exposure ages increase monotonically with elevation ranging from 2.6 to 9.6 ka over the 51m scarp length giving an average dip-slip rate of 7.5 m/ka during the Holocene period and a vertical uplift rate of 5.7 m/*** 5.7 m/ka Holocene uplift rate and supporting geomorphic features suggest that the uplift of the Yulong Mountains mainly occurred in the *** fast slip rate and seismic quiescence for the recent 2.8 ka call attention to the possible recurrence of large magnitude earthquake events along the fault zone.

关键词： Daju fault Dip-slip rate Cosmogenic nuclide Yulong Mountains Dali block

Late Miocene ice sheet elevation in the Grove Mountains,East Antarctica,inferred from cosmogenic 21 Ne-10Be-26Al

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Late Miocene ice sheet elevation in the Grove Mountains,East...

中国科学院地质与地球物理研究所第十届(2010年度)学术年会

作者： david fink Institute for Environmental Research Australian Nuclear Science & Technology Organisation Menai NSW2234 Australia

The Grove Mountains,lying in the interior of East Antarctica,consist of 64 *** characteristics of the nunataks suggest that past ice sheet elevations have overtopped the summits of the Grove *** Ne,Be and Al dating yields surface exposure ages of five bedrock samples taken from the crest of Mount Harding,a typical nunatak in the Grove *** multi-nuclide fitting,we have calculated the time that the ice sheet retreated below the crest of Mount Harding;all data point to the late Miocene,～6.3Ma *** results provide the first land-based evidence of the elevation of the East Antarctic Ice Sheet in the Grove Mountains in Late Miocene,which reached 2300 m, 200 m higher than the current ice sheet *** higher than current ice sheet elevations during the late Miocene together with contemporaneously higher temperatures in the Southern Ocean suggest that moisture transport plays an important role in ice sheet expansion in the interior of East Antarctica.

关键词： exposure age cosmogenic nuclide Grove Mountains Antarctica Late Miocene

Cosmogenic 10Be inferred lake-level changes in Sumxi Co basin,Western Tibet

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Cosmogenic 10Be inferred lake-level changes in Sumxi Co basi...

中国科学院地质与地球物理研究所2007学术年会

作者：孔屏 david fink State Key Laboratory of Lithospheric Evolution.Institute of Geology and Geophysics.Chinese Academy of Sciences Institute of Tibetan Plateau Research Chinese Academy of Sciences ANSTO-Environment.Australian Nuclear Science and Technology OrganisationMenaiNSW 2234Australia

Most Tibetan lakes are surrounded by conspicuous regressive shorelines attesting to high-water levels in the *** of the in situ produced cosmogenic radionuclide Be in bedrock from the three highest terraces surrounding Sumxi Co,situated in Western Kunlun,indicate that the highest lake-level appeared before 10,000-11,500yr,and most likely between 11,000 and 12,800 *** ages for the two lower terraces imply regression of Sumxi Co during the early-mid *** concurrency of the highest lake-level with orbitally induced maximum northern hemisphere summer insolation suggests that the increase in water supply to Sumxi Co was most likely associated with increased recharge from melting *** conclude that the enhanced Indian monsoon during the early Holocene did not penetrate the Tibetan plateau and affect the northwestern part of Tibet significantly.

关键词： Cosmogenic 10Be Sumxi Co Exposure age Holocene Tibet West Kunlun Lake terrace

Erosion in northwest Tibet from in-situ-produced cosmogenic 10Be and 26Al in bedrock

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Erosion in northwest Tibet from in-situ-produced cosmogenic ...

中国科学院地质与地球物理研究所2007学术年会

作者：孔屏 david fink ANSTO-Environment AustralianNuclearScienceandTechnologyOrganisationMenaiNSW2234Australia InstituteofTibetanPlateauResearch ChineseAcademyofSciences StateKeyLaboratoryofLithosphereTectonicEvolution InstituteofGeologyandGeophysicsChineseAcademyofSciences

Concentrations of in-situ-produced cosmogenic nuclides 10Be and 26Al in quartz were measured by accelerator mass spectrometry for bedrock basalts and sandstones located in northwest Tibet The

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Further geological and palaeoanthropological investigations at the Maludong hominin site, Yunnan Province, Southwest China

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Chinese Science Bulletin 2013年第35期58卷 4472-4485页

作者： JI XuePing CURNOE Darren BAO ZhenDe HERRIES Andy I R fink david ZHU YunSheng HELLSTROM John LUO Yun TACON Paul S C Yunnan Institute of Cultural Relics and Archaeology School of Biological Earth and Environmental Sciences University of New South Wales Sydney 2052 Australia Mengzi Institute of Cultural Relics Archaeomagnetism Laboratory Archaeology Program School of Historical and European Studies La Trobe University Melbourne 3086 Australia Institute for Environmental Research Australian Nuclear Science and Technology Organisation Sydney 2001 Australia Honghe Prefectural Institute of Cultural Relics School of Earth Sciences University of Melbourne Melbourne 3010 Australia Place Evolution and Rock Art Heritage Unit School of Humanities Gold Coast Campus Griffith University Gold Coast 4222 Australia

Three-dimensional mapping and section work undertaken by us in 2008 have identified 11 stratigraphic units at Maludong *** radiocarbon dating of charcoal established an accurate and internally consistent age profile for the sequence of 17.8±0.2 ka to 13.2±0.1 *** analysis showed changes in externally derived pedogenically enhanced material consistent with a warming in climate between the cold period of Henrich Event 1 and the B lling-Aller d *** remains recovered during the 1989 excavation were derived from a deposit dating to this interstadial,or between 14.3±0.3 ka and 13.5±0.1 *** features,including burnt rocks,baked sediment and thick charcoal and ash layers,were identified and examined through archaeomagnetic *** monkey fossils are described here,one of them being reassigned from Macaca robustus to *** confirm the young age of the site and also show signs of anthropogenic alteration in the form of *** human cranial remains are reported for the first time and new data are provided for some specimens described previously.A range of new features is identified that strengthen the affinities of the Maludong remains to archaic *** presence of this globally unique mosaic of archaic and modern features raises important questions about human evolutionary history in East Asia during the Late Upper Pleistocene.

关键词：古人类遗址中国西南地区古人类学云南省地质地层单位三维制图年龄分布

宇宙成因核素^26Al/^10Be埋藏测年法在宁夏沙坡头黄河砾石阶地年代研究中的应用

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第四纪研究 2016年第5期36卷 1216-1223页

作者：韩非顾兆炎尹功明 david fink 王躲中国地震局地质研究所地震动力学国家重点实验室北京100029 中国科学院地质与地球物理研究所新生代地质与环境重点实验室北京100029 澳大利亚国家原子能研究中心环境研究所 ANSTOPMB1Menai2234Australia

本文利用宇宙成因核素^26Al/^10Be埋藏测年法对宁夏沙坡头地区黄河左岸的T5、T6、T8和T9阶地开展了年代学研究。采用简单快速埋藏模式获得4级阶地的^26Al/^10Be埋藏年龄分别约为0.25Ma、0.36Ma、0.59Ma和1.06Ma，如果考虑后期剥蚀作用... 详细信息

本文利用宇宙成因核素^26Al/^10Be埋藏测年法对宁夏沙坡头地区黄河左岸的T5、T6、T8和T9阶地开展了年代学研究。采用简单快速埋藏模式获得4级阶地的^26Al/^10Be埋藏年龄分别约为0.25Ma、0.36Ma、0.59Ma和1.06Ma，如果考虑后期剥蚀作用的影响（E≈5m/Ma），则4级阶地的年龄分别约为0.42Ma、0.39Ma、1.02Ma和1.59Ma。本研究未发现砾石大小与^10Be、^26Al核素浓度及^26Al/^10Be比值有明显相关性。

关键词：宇宙成因核素 ^26Al/^10Be埋藏测年砾石黄河阶地沙坡头

Preliminary study on the erratic exposure ages of Grove Mountains,East Antarctica

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Chinese Journal of Polar Science 2009年第1期20卷 15-21页

作者：李广伟刘小汉黄费新孔屏 fink david 韦利杰方爱民 Institute of Tibetan Plateau Research Chinese Academy of Sciences Graduate University of the Chinese Academy of Sciences Institute of Geology and geophysics Chinese Academy of Sciences Australian Nuclear Science and Technology Organization Menai Institute of Geomechanics Chinese Academy of Geological Sciences

The first study of erratic boulder exposure ages in the Grove Mountains, interior Antarctica, indicates the two erratic boulders （060131-1 and 060131-2, collected from a typical nunataks, Zakharoff Ridge in the Grove Mountains） have 10 Be minimum exposure ages of 1.24 ±0. 11 Ma, 1.37 ±0. 12 Ma, and ^26Al ages of 0.90 ±0.12 Ma,0.44 ±0.04 Ma, respectively. Meanwhile, another erratic boulder sample 060131-4, coming from vicinal ice surface, has ^10Be and ^26Al minimum exposure ages of 0.47 ±0.3 Ma and 0. 44 ±0.04 Ma, respectively. The exposure ages of the three erratic boulders are nearly similar to the bedrocks with the similar elevation. Thus, using the technique of in situ produced terrestrial cosmogenic nuclides, the ice sheet evolution histories in the Grove Mountains reflected by erratic boulder and bedrock exposure ages are basically consistent.

关键词： East Antarctica Grove Mountains Zakharoff Ridge, ^10 Be and ^26 AI exposure age erratic boulders.

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VXI信号开关:通道选择器件

国外电子测量技术 1996年第1期 24-28,32页

作者： david fink 泰克公司

本文论述了使用切换开关的必要性、信号通道质量和测量技术及可靠性等方面的问题。

关键词： VXI开关通道器件信号通道信号测量测试系统