書誌事項
- タイトル別名
-
- Last 2,000 Year Records of Eolian Dust Concentration Sea-level and Precipitation Changes in Fine-grained Sediment of Lake Suigetsu, Central Japan.
- スイゲツコ サイリュウ タイセキブツ ニ ミトメラレル カコ 2 000ネンカ
この論文をさがす
抄録
Mineralogical characteristics of last 2, 000 year records in a meromictic lake, Lake Suigetsu, are the indicators of eolian dust concentrations, sea-level and rainfall changes in central Japan.Lake Suigetsu sediment records shows that there was no large influx of terrestrial materials intolake basin. Sequential changes of illite crystallinity and quartz/illite ratio in Late Quaternaryfine-grained sediments at Site 794 and Site 795 of ODP Leg 127 of were well correlated tostandard recocds of oxygen isotope change by Prell et al.(1986). This suggests that theseparameters are useful to detect eolian dust concentration within sediments. In other words, occurrence of hydrated illite and small concentration of illite suggest that paleosols were greatlyformed under wet climate in northern China. Sea-level and rainfall changes were detected byiron mineral compositon and chlorite/illite ratio.Investigations show that climatic changes in northern China were parallel to sea-levelchanges of the Wakasa Bay in southern part of the Japan Sea. In 250, 820, 1170, 1320, 1500and 1889 A.D., sea-level was risen in the Wakasa Bay when northern China was in wetclimate. It is because that Asian monsoon was active in globally warm cliate at these times, andthat active monsoon took humid atmosphere into northern China. In 250, 820, 1050-1200, 1320, 1500 and 1880 A.D., there seems to have been heavy rainfall around Lake Suigetsu with sea-levelrising in the Wakasa Bay. This suggests of influxing of Tsushima Current, supplying humidatmosphere and rising of sea-level. In 350-550 and 1350-1400 A.D., precipitations were heavyin the Wakasa region, though there are no rising of sea-level, and dry and cool climate in China.
収録刊行物
-
- 地学雑誌
-
地学雑誌 104 (1), 69-81, 1995
公益社団法人 東京地学協会
- Tweet
キーワード
詳細情報 詳細情報について
-
- CRID
- 1390282679205316992
-
- NII論文ID
- 110000379750
- 10003563964
-
- NII書誌ID
- AN00322536
-
- ISSN
- 18840884
- 0022135X
- http://id.crossref.org/issn/0022135X
-
- NDL書誌ID
- 3595872
-
- 本文言語コード
- ja
-
- データソース種別
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- 抄録ライセンスフラグ
- 使用不可