Geomorphological and paleoclimatic implications of soil development from siliceous materials on the coral-reef terraces of Liuchiu Island in southern Taiwan

in Sciences Citation Index(SCI), 科學引文索引資料庫(SCI)
標題Geomorphological and paleoclimatic implications of soil development from siliceous materials on the coral-reef terraces of Liuchiu Island in southern Taiwan
出版類型SCI(Sciences Citation Index)
出版年度2011
AuthorsC.H. Cheng, 鄭長和, Jien 簡士濠, H. Tsai 蔡衡, & Hseu 許正一
開始頁114
頁數13
出版日期2011 / 3
其他編號NSC 93-2313-B-020-018
中文摘要

Liuchiu Island is an uplifted coral-reef island located off southwestern Taiwan. A total of four soil pedons, labeled as LC-1 and LC-2 from the Holocene terraces and LC-3 and LC-4 from the Pleistocene terraces, were sampled on the island for this work. These soils were siliceous, and were characterized by enrichment of clay and free Fe. According to Soil Taxonomy, pedons LC-3 and LC-4 were classified as Paleudults and pedons LC-1 and LC-2 were Dystrudepts. The soil properties showed progressive changes from pedon LC-1 to pedon LC-4 in morphology, physical and chemical properties, and clay mineralogy. The contents of total Fe and dithionite-citrate-bicarbonate extractable Fe were significantly higher in pedons LC-3 and LC-4 with high weathering degree than in pedons of LC-1 and LC-2 with less weathering degree. Enrichment of Kaolinite and Gibbsite in pedons LC-3 and LC-4 also suggested highly chemical weathering degree of the soils. The estimated soil ages for all studied pedons were consistent with their degrees in pedogenesis, which pedons LC-3 and LC-4 were located at older terraces and pedons LC-1 and LC-2 were located at younger terraces. Namely, it complied with the geologic interpretation of the continuous and simultaneous uplift and tilt of the island over time. Instead of the in-situ weathering from the underlying coral reef limestone, all soils developed from siliceous parent materials deposited onto the surfaces. The SiO2/Al2O3 ratios of soils indicated a component of loess may have incorporated from the continental China as part of the parent material, which confirmed a climate change of strong monsoons or severe dust storms occurred before Holocene. However, the soil development increased by the subsequent warm and humid climates of the interglacial stage over time.

網址http://www.blackwellpublishing.com
期刊名稱Soil Science and Plant Nutrition
校址:912 屏東縣內埔鄉學府路1號 總機:886-8-7703202 傳真:886-8-7740165 系統開發統維護單位:國立屏東科技大學 電算中心 版權所有