WEATHERING AND DENUDATION RATES OF LIMESTONES AND FORMATIVE PROCESSES OF KARST LANDFORMS
WEATHERING AND DENUDATION RATES OF LIMESTONES AND FORMATIVE PROCESSES OF KARST LANDFORMS
批准号:
19300305
负责人:
MATSUKURA Yukinori
金额:
$9.48万
依托单位:
依托单位国家:
日本
项目类别:
Grant-in-Aid for Scientific Research (B)
财政年份:
2007
资助国家:
日本
项目状态:
已结题
起止时间:
2007 至 2009
中文摘要
本研究试图通过使用方解石中宇宙成因^<36>Cl来量化裸露的碳酸盐岩表面的长期陆上剥蚀。在日本亚热带至亚北极地区的几个非冰川喀斯特地区,从裸露的石尖最上面5cm处采集了碳酸盐样品。用同位素稀释的加速器质谱法测定了方解石中天然Cl和^<35>Cl富集载流子峰的浓度。核素浓度的数量级为10^5-10^6原子g^<-1>,并转换为作用于喀斯特表面的化学和物理过程在10^5年时间尺度上的平均总剥蚀率。剥蚀率为20 ~ 60mmkyr < 1>,以日本中部地区最低。这种趋势表明,在剥蚀过程中,化学(溶解)和物理(碎霜)过程的相对重要性的交替取决于特定地点的因素,如平均温度、年降水量和冻融强度。
英文摘要
This study attempted to quantify long-term subaerial denudation of bare carbonate rock surfaces by using in situ-produced cosmogenic ^<36>Cl in calcite. Carbonate samples were collected from the topmost 5cm of exposed pinnacles at several non-glaciated karst areas in subtropical to subarctic regions in Japan. Concentrations of natural Cl and ^<36>Cl in calcite were determined by accelerator mass spectrometry with isotope dilution with ^<35>Cl-enriched carrier spike. The nuclide concentrations were of the order of 10^5-10^6 atom g^<-1>, and converted to total denudation rates averaged over a 10^5 yr-timescale of chemical and physical processes acting on the karst surfaces. The denudation rates were 20-60mm kyr<-1>, being lowest in the central part of Japan. This tendency indicates the alternation of relative importance of chemical (dissolution) and physical (frost shattering) processes in denudation, depending on site-specific factors such as mean temperature, annual precipitation, and freeze-thawing intensity.
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Critical notch depths for failure of coastal limestone cliffs : Case study at Kuro-shima, Okinawa, Japan
沿海石灰岩悬崖破坏的临界凹口深度:日本冲绳黑岛的案例研究
DOI:
--
发表时间:
2010
期刊:
Earth Surface Processes and Landforms
影响因子:
3.3
作者:
[Kogure, T., Matsukura, Y]
通讯作者:
Y
地形変化の科学 : 風化と侵食
地貌变化科学:风化和侵蚀
DOI:
--
发表时间:
2008
期刊:
影响因子:
--
作者:
[松四雄騎・松倉公憲, ほか3名, 増澤武弘(編著), 松倉公憲]
通讯作者:
松倉公憲
Dissolution rates of limestone tablets in a flow-through system : a laboratory experiment
流通系统中石灰石片的溶解速率:实验室实验
DOI:
--
发表时间:
2008
期刊:
Tsukuba Environmental Science 4巻
影响因子:
--
作者:
[Hattannji, T., Yamamoto, M, Matsukura, Y.]
通讯作者:
Y.
石灰岩タブレットを用いた野外風化実験 : 水質が風化速度に与える影響
使用石灰石片进行现场风化实验:水质对风化速率的影响
DOI:
--
发表时间:
2007
期刊:
筑波大学陸域環境研究センター報告 8号
影响因子:
--
作者:
[八反地剛, 松倉公憲]
通讯作者:
松倉公憲
ノッチおよび垂直節理が発達したサンゴ礁石灰岩崖における重力性および波浪性崩壊
具有发达凹口和垂直节理的珊瑚礁石灰岩悬崖的重力和波浪塌陷。
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
[小暮哲也, 松倉公憲]
通讯作者:
松倉公憲
共 12 条
Effects of climatic environment on rock weathering
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批准号:16300292
-
项目类别:Grant-in-Aid for Scientific Research (B)
-
资助金额:$8.13万
-
财政年份:2004
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负责人:MATSUKURA Yukinori
-
依托单位:
Changes in rock properties of some landform materials due to weathering
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批准号:05452340
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项目类别:Grant-in-Aid for General Scientific Research (B)
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资助金额:$4.54万
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财政年份:1993
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负责人:MATSUKURA Yukinori
-
依托单位:
海外基金