Kish Island is elliptical-shaped with 7 km width, 15.6 km length and 89.7 km2 space, located in the Persian Gulf, south of Iran. There are many tourism potentials. In order to better know and evaluate the recent sedim...Kish Island is elliptical-shaped with 7 km width, 15.6 km length and 89.7 km2 space, located in the Persian Gulf, south of Iran. There are many tourism potentials. In order to better know and evaluate the recent sediments and soils of this island, field studies are done. One hundred samples are taken and subjected to geology and pedology examinations. The whole surface of the studied area is covered by Quaternary deposits. The rock units of these deposits are formed with reef limestone and little gypsum marl. Recent sediments and soils of Kish Island with very little thickness are exposed to marine currents, such as wave, tide and wind and temporary runoffs on reef limestone, which are formed approximately 11,000 years ago. In addition of carbonate deposit, there are few amounts of clay minerals, gypsum and halite that are present in the combination of fine grain to coarse grain. The soils of this island are categorized in 23 series and four classes. The soil has low fertility.展开更多
Based on a δ180 chronology, rare earth elements （REE） and other typical elements in sediments from core MD06-3047 in the western Philippine Sea were analyzed to constrain the provenances of the sediments and invest...Based on a δ180 chronology, rare earth elements （REE） and other typical elements in sediments from core MD06-3047 in the western Philippine Sea were analyzed to constrain the provenances of the sediments and investigate quantitative changes in the Asian eolian input to the study area over the last 700 ka. Among the competing processes that might affect REE compositions, sediment provenance is the most important one. Provenance analysis suggests that the study sediments have two provenance end-members; local volcanic sources are dominant, and eolian dust from the Asian continent has a smaller contribution. During glacial periods, eolian input to the western Philippine Sea was enhanced. In contrast, material supply from local volcanics in- creased during interglacial periods. Changes in eolian input to the study area were probably related to the strength of the East Asian winter monsoon （EAWM） as well as aridity in the Asian continent on an orbital time scale, and were partly influenced by local control factors on shorter time scales. Therefore, we propose that the present study expands the application of the REE-based method for quantitatively estimating the eolian component from the mid-latitude northern Pacific to the low-latitude western Pacific. Additionally, the study preliminarily confirms the influence of EAWM-transported eolian materi- al on sedimentation in the western Philippine Sea since 700 ka.展开更多
文摘Kish Island is elliptical-shaped with 7 km width, 15.6 km length and 89.7 km2 space, located in the Persian Gulf, south of Iran. There are many tourism potentials. In order to better know and evaluate the recent sediments and soils of this island, field studies are done. One hundred samples are taken and subjected to geology and pedology examinations. The whole surface of the studied area is covered by Quaternary deposits. The rock units of these deposits are formed with reef limestone and little gypsum marl. Recent sediments and soils of Kish Island with very little thickness are exposed to marine currents, such as wave, tide and wind and temporary runoffs on reef limestone, which are formed approximately 11,000 years ago. In addition of carbonate deposit, there are few amounts of clay minerals, gypsum and halite that are present in the combination of fine grain to coarse grain. The soils of this island are categorized in 23 series and four classes. The soil has low fertility.
基金supported by the Public Science and Technology Research Funds Projects of the OceanState Oceanic Administration of the People’s Republic of China(Grant No.201005003)+1 种基金the National Natural Science Foundation of China(Grant Nos.41376064,41230959,41106043,and 41076033)the National Basic Research Program of China(Grant No.2007CB815903)
文摘Based on a δ180 chronology, rare earth elements （REE） and other typical elements in sediments from core MD06-3047 in the western Philippine Sea were analyzed to constrain the provenances of the sediments and investigate quantitative changes in the Asian eolian input to the study area over the last 700 ka. Among the competing processes that might affect REE compositions, sediment provenance is the most important one. Provenance analysis suggests that the study sediments have two provenance end-members; local volcanic sources are dominant, and eolian dust from the Asian continent has a smaller contribution. During glacial periods, eolian input to the western Philippine Sea was enhanced. In contrast, material supply from local volcanics in- creased during interglacial periods. Changes in eolian input to the study area were probably related to the strength of the East Asian winter monsoon （EAWM） as well as aridity in the Asian continent on an orbital time scale, and were partly influenced by local control factors on shorter time scales. Therefore, we propose that the present study expands the application of the REE-based method for quantitatively estimating the eolian component from the mid-latitude northern Pacific to the low-latitude western Pacific. Additionally, the study preliminarily confirms the influence of EAWM-transported eolian materi- al on sedimentation in the western Philippine Sea since 700 ka.
