The Quaternary Research (daiyonki-kenkyu)最新文献_第10页

The Paper for the 2011 Japan Association for Quaternary Research Academic Award Research results of earthquake-archaeology 2011年日本第四纪研究协会学术奖论文——地震考古研究成果

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2013-10-01 DOI: 10.4116/JAQUA.52.191

A. Sangawa

引用次数: 4

A personal review of Quaternary studies 第四纪研究述评

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2012-06-01 DOI: 10.4116/jaqua.51.165

Y. Naruse

引用次数: 0

Small laboratory experiments suitable for improving the eye for seeing landscapes 小型实验室实验，适合改善眼睛看风景

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2011-10-01 DOI: 10.4116/jaqua.50.209

Hiroshi Ikeda

引用次数: 2

特集「第四紀の開始期の環境変動とテクトニクス : 第四紀の新定義を検証する」の趣旨专题“第四纪起始期的环境变化与构造学:检验第四纪新定义”的主旨

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2010-10-01 DOI: 10.4116/JAQUA.49.271

岳雪植木, 邦彦遠藤

引用次数: 0

Tsunami deposit from the 7,300 cal BP Akahoya eruption preserved in the Yokoo midden, north Kyushu, West Japan 在日本西部九州北部的横尾中部，保存着距今7300年前赤胡屋火山喷发的海啸沉积物

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2010-02-01 DOI: 10.4116/JAQUA.49.23

O. Fujiwara, H. Machida, Shiochi Jun-ichi

{"title":"Tsunami deposit from the 7,300 cal BP Akahoya eruption preserved in the Yokoo midden, north Kyushu, West Japan","authors":"O. Fujiwara, H. Machida, Shiochi Jun-ichi","doi":"10.4116/JAQUA.49.23","DOIUrl":"https://doi.org/10.4116/JAQUA.49.23","url":null,"abstract":"大分市の横尾貝塚で見られる厚い鬼界アカホヤ火山灰層（K-Ah : 層厚約65 cm）について，堆積構造の解析などに基づいて形成プロセスを復元した．この火山灰層をもたらした噴火は，横尾貝塚から約300 km南にある鬼界カルデラで約7,300 cal BPに発生した．これは完新世における地球上で最大規模の噴火イベントの一つである．横尾貝塚のK-Ahは湾奥にあった小規模な谷に堆積したもので，さまざまな堆積構造が発達するイベント堆積物（ユニットI～V : 層厚約35 cm）と，それを覆う均質なユニットVI（層厚約30 cm）からなる．イベント堆積物はK-Ahの降灰中に谷に突入した流水によって堆積し，ユニットI～Vの累積構造からは，谷を遡上する流れと下る流れが長周期で繰り返したことが読み取れる．ユニットVIは降下火山灰と考えられる．K-Ah降下との同時性や，長周期で遡上と流下を繰り返す特徴は，K-Ah下部を構成するイベント堆積物がアカホヤ噴火に伴う津波堆積物であることを強く示唆する．","PeriodicalId":106287,"journal":{"name":"The Quaternary Research (daiyonki-kenkyu)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2010-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124724146","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

琵琶湖の堆積物を用いたモンスーン変動の復元 —ミランコビッチ＝クズバッハ仮説の矛盾と克服— 利用琵琶湖的沉积物复原季风变化——克服米兰科维奇-库兹巴赫假说的矛盾

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2009-06-01 DOI: 10.4116/JAQUA.48.207

毅史中川, 昌明奥田, 仁志米延, 教夫三好, 恵二竹村

{"title":"琵琶湖の堆積物を用いたモンスーン変動の復元 —ミランコビッチ＝クズバッハ仮説の矛盾と克服—","authors":"毅史中川, 昌明奥田, 仁志米延, 教夫三好, 恵二竹村","doi":"10.4116/JAQUA.48.207","DOIUrl":"https://doi.org/10.4116/JAQUA.48.207","url":null,"abstract":"過去におけるモンスーン変動のパターンを復元するための代表的な試料として，中国のレス古土壌堆積物と鍾乳石をあげることができる．だが，前者が主としてモンスーンと氷期・間氷期サイクルの密接な結びつきを示唆するのに対し，後者においては太陽放射の直接の影響の方が卓越するなど，両者の間には本質的に解決されない矛盾が存在していた．著者らは，琵琶湖の堆積物コアの化石花粉データを用いて，季節ごとの気候を過去45万年にわたって定量的に復元することで，この矛盾を統合的に説明することを試みた．その結果，シベリアと太平洋の気団の温度はいずれも氷期・間氷期サイクルに応じて変動するが，海陸の温度傾度においてはそのような変動が相殺され，むしろ太陽放射の直接の影響の方が卓越することがわかった．また海陸の温度傾度はモンスーンの直接の駆動力であるため，夏モンスーンの強度も太陽放射の変動周期に同調して（すなわち，主として23,000年の歳差運動周期で）変動していた．ただし，太陽放射の振幅が十分に大きくない時代においては，モンスーンは氷期・間氷期サイクルの方に連動する傾向が見られた．本稿では，これらの事実を総合的に説明することのできる，きわめて単純なモデルについて解説する．またモンスーンが海洋の表面温度の分布に及ぼすかもしれない長期的な影響，ならびにレス古土壌堆積物が内包している，モンスーンの記録計としての問題点についても言及する．","PeriodicalId":106287,"journal":{"name":"The Quaternary Research (daiyonki-kenkyu)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2009-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122853945","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Holocene paleoenvironmental changes at coastal Kuninaka Plain, Sado Island, off central Japan, as deduced from analysis of drilling data 日本中部佐渡岛海岸国中平原全新世古环境变化，由钻井资料分析推断

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2008-06-01 DOI: 10.4116/JAQUA.47.143

Y. Ota, Akiko Matsubara, Y. Matsushima, K. Kashima, Atsuko Kanauchi, Yasuhiro Suzuki, Mitsuhisa Watanabe, H. Sawa, T. Azuma

引用次数: 0

Paleoclimate of Interglacial Marine Isotope Stage 11 (MIS 11) from Strata in the Japanese Isalands 日本列岛地层中间冰期海洋同位素第11期古气候

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2007-06-01 DOI: 10.4116/jaqua.46.235

F. Masuda

引用次数: 4

Environmental Changes in Brackish Lake Obuchi-numa, Aomori Prefecture, Northeast Honshu, Japan, with Special Reference to Sea-level Variation in the 20th Century 日本本州东北部青森县小渊沼咸淡湖的环境变化，特别是20世纪海平面变化

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2006-10-01 DOI: 10.4116/JAQUA.45.347

R. Nomura, N. Nemoto, K. Komura

{"title":"Environmental Changes in Brackish Lake Obuchi-numa, Aomori Prefecture, Northeast Honshu, Japan, with Special Reference to Sea-level Variation in the 20th Century","authors":"R. Nomura, N. Nemoto, K. Komura","doi":"10.4116/JAQUA.45.347","DOIUrl":"https://doi.org/10.4116/JAQUA.45.347","url":null,"abstract":"The recent history of brackish Lake Obuchi-numa, Aomori Prefecture, Japan, was investigated, in order to examine the ecological and geochemical response to annual sea-level variations. The core sediment was calibrated by 210Pb and 137Cs radioactivity measurement and the calculated sedimentation rate was 0.075 g/cm2/yr during the 20th century. A foraminiferal assemblage composed exclusively of Ammonia “beccarii ” developed in 1954 and in the 1960s to early 1970s, but it was largely absent before the 1950s and after the 1980s. The occurrences of A. “beccarii ” are mostly in concert with the sea-level rise recorded off Hachinohe, suggesting the active exchange of lagoon and marine water. Geochemical evidence such as chlorine and sulfur supports the influence of marine water when sea-level rose. Total organic carbon to total nitrogen ratios (C/N ratios) decreased in the periods when foraminifera were abundant, and the ratios positively suggest increased supply of N-rich proteins to the sediment. However, there was no clear response of A. “beccarii ” to the sea-level rise that continued after 1990 to the present. The decreased A. “beccarii ” assemblages were probably a result of significant human activities from the 1980s onwards.","PeriodicalId":106287,"journal":{"name":"The Quaternary Research (daiyonki-kenkyu)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121563640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Structurally Controlled Geomorphology on the Southern Boso Peninsula, Central Japan 日本中部博索半岛南部的构造控制地貌

The Quaternary Research (daiyonki-kenkyu) Pub Date : 2006-08-01 DOI: 10.4116/JAQUA.45.263

T. Miyauchi, T. Minawa, T. Ito, H. Kato, T. Kawamura, T. Ikawa, Kazumi Asao

{"title":"Structurally Controlled Geomorphology on the Southern Boso Peninsula, Central Japan","authors":"T. Miyauchi, T. Minawa, T. Ito, H. Kato, T. Kawamura, T. Ikawa, Kazumi Asao","doi":"10.4116/JAQUA.45.263","DOIUrl":"https://doi.org/10.4116/JAQUA.45.263","url":null,"abstract":"A graben is defined geologically as a topographic depression generated by dip-slip faulting. The Kamogawa Graben on the southern Boso Peninsula, central Japan, is considered to be a typical graben, although it has yet to be geomorphologically or geologically verified. In this study we use seismic reflection profiling and analyses of geomorphic and geologic data to reexamine the unsolved question of whether this structure is in fact a graben. We present an interpretation of the structure in terms of its structurally controlled geomorphic evolution. On the basis of our analysis, we conclude that the so-called Kamogawa Graben is not actually a graben, as graben structures are not observed in seismic images and there is no positive cumulative deformation recorded by active faults at the surface. The topographic lineaments that bound the depression between the Kazusa Hills and the Awa Hills constitute fault-line valleys and obsequent fault-line scarps. The northern lineament has developed along the geologic contact between fractured shale of the Hota Group and mudstone and sandstone of the Miura Group, while the southern lineament has developed between mudstone and sandstone formations within the Hota Group, along the Sorogawa Fault. These observations suggest that differential erosion of shale, mudstone, and sandstone strata produced the observed graben-like relief. Weathered shale is especially susceptible to erosion and is marked by areas of relatively low relief. The presence of paleo-river channels and obsequent fault-line scarps leads us to the proposal that an earlier river system developed on the pre-erosion mountainous topography that overlaid the present Mineoka Mountains. Such a geomorphic evolution of the southern Boso Peninsula is therefore structurally controlled, and the Kamogawa Graben is in fact a structural depression rather than a graben.","PeriodicalId":106287,"journal":{"name":"The Quaternary Research (daiyonki-kenkyu)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130322966","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1