Supercritical flow sedimentation of flash floods and its preservation potential in rock records

山洪暴发的超临界流沉积及其在岩石记录中的保存潜力

• 批准号: 21540474
• 负责人: MAEJIMA Wataru
• 金额: $ 2.75万
• 依托单位: Osaka City University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2009
• 资助国家: 日本
• 起止时间: 2009-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-21540474/
• 关键词: 射流; 反砂堆; 堆積作用; 堆積環境; 堆積構造; 堆積相; シート洪水流; 国見層; チャネル砂州; 国見累層; 形態; 水路実験; フラッシュ洪水; タルチール累層; カルン湖; 射流領域; ゴンドワナ氷床

Studies of several sedimentary successions revealed that records of supercritical flow sedimentation are well preserved in flash flood deposits. The form of internal stratification of supercritical flow deposits shows wide variability, especially in its amplitude/wave length ratio. This variability in stratification is attributed to the morphological differences in antidune bedforms. The flume experiments show the amplitude/wave length ratio of antidunes is dependent with flow depths; shallower the flow depth, higher the amplitude/wave length ratio. Comparison of forms of internal stratification of in-channel flood deposits and sheet flood deposits in the Neogene Kunimi Formation revealed that the values of amplitude/wave length ratio of anidunes in the latter are consistently larger than the values in the former. This result is compatible with the results of the flume experiments.

对几个沉积序列的研究表明，超临界流沉积记录在山洪暴发沉积中保存良好。超临界流体沉积物的内部层结形式表现出很大的变异性，特别是在其幅度/波长比上。这种层结的变异性归因于反沙丘底形的形态差异。水槽试验表明，反沙丘的振幅/波长比与水流深度有关，水流深度越浅，振幅/波长比越高。通过对新近系库尼米组河道内洪水沉积和片状洪水沉积内部层结形式的对比，发现后者的波幅/波长比值始终大于前者。这一结果与水槽试验结果相吻合。

项目成果

Antidunes and antidune stratification in the Permo-Carboniferous Talchir Formation, Talchir Gondwana basin, Orissa, India

印度奥里萨邦塔尔奇冈瓦纳盆地二叠纪-石炭纪塔尔奇尔组的反沙丘和反沙丘分层

• 发表时间: 2009
• 期刊: Journal of geosciences, Osaka City University
• 作者: W. Maejima;Rabindra Nath Hota;B. Mishra
• 通讯作者: B. Mishra

反砂堆の形態の多様性 -特に波高：波長比について-

反沙洲形态的多样性 - 特别是波高：波长比 -

• 发表时间: 2012
• 作者: Yamamoto;M.K.;M.Abo;T.Kishi;N.Nishi;T.H.Seto;H.Hashiguchi;M.Yamamoto;S.Fukao;卜部厚志・宮地良典・稲崎富士・楮原京子;前島 渉
• 通讯作者: 前島 渉

Distal storm sedimentation of the Lower Cretaceous Arida Formation, Yuasa-Aridagawa basin, Southwest Japan

日本西南部汤浅-有田川盆地下白垩统有田组的远端风暴沉积

• 发表时间: 2011
• 期刊: Jour.Geosci., Osaka City Univ.
• 作者: YAMAMOTO;M.;Tomohiro KATO;Keigo ISHISAKA; Tatsuhiro YOKOYAMA;Naomoto IWAGAMI,Takao TAKAHASHI;Makoto TANAKA; Ken ENDO; Atsushi KUMAMOTO;Shigeto WATANABE;Masa-Yuki YAMAMOTO;Takumi ABE; Susumu SAITO;Takuya TSUGAWA;Michi NISHIOKA;Paul BERNHARDT;Ide Yusuke
• 通讯作者: Ide Yusuke

Antidunes and antidune stratification in the Permo-Carboniferous Talchir Formation

二叠纪-石炭纪 Talchir 组的反沙丘和反沙丘层结

• 发表时间: 2009
• 期刊: Talchir Gondowana basin, Orissa, India、Journal of Geosciences, Osaka City Univ
• 作者: Maejima;W.;Hota;R. N. and Mishra;B
• 通讯作者: B

反砂堆の形態の多様性―特に波高:波長比について―

反沙洲形态的多样性 - 特别是波高：波长比 -

• 发表时间: 2012
• 作者: 前島渉;小川尚真
• 通讯作者: 小川尚真