کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4548383 | 1327900 | 2010 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Marine sand resources in the Pearl River estuary waters of China
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Marine sand resources in the Pearl River estuary waters of China Marine sand resources in the Pearl River estuary waters of China](/preview/png/4548383.png)
چکیده انگلیسی
Marine sand is one of the most important marine mineral resources in the Pearl River estuary as well as nearby Hong Kong waters of China. For more healthy and order development of marine sand extraction activities, about 518Â km of initial seismic exploration and marine drilling of 5 validation boreholes with total footage of 176.7Â m were carried out in 2001 and 2002 respectively, and the preliminary overall situation of marine sand resources in the Pearl River estuary waters was clarified. Based on geological interpretation of GeoPulse seismic profiles and core sample analyses of boreholes, the Quaternary stratigraphic sequence in the Pearl River estuary was divided into four depositional units: the upper marine unit of Holocene marine mud, and other three late Pleistocene units: the upper terrestrial unit of weathered mottled clay, the lower marine unit of silty clay, and the lower terrestrial unit of alluvial sand. The main type of marine sand occurrence and the main exploration targets for marine sand resources are identified in the late Pleistocene paleo-Pearl River channel sand at the lower terrestrial unit. The most valuable marine sand resources are located in Holocene tidal channel which coincide with late Pleistocene paleo-channels where the Holocene marine mud overburden is thinner. Sustainable development and scientific management of marine sand resources in the Pearl River estuary waters must strengthen legal system construction, work out scientific exploitation planning, strengthen environmental impact research, and strictly enforce pertinent laws. In about 3000Â km2 Pearl River estuary waters tentative estimation of reserves of buried marine sand is 12.5Â ÃÂ 108Â m3 in 20 sites, of which 10 sites with 5.38Â ÃÂ 108Â m3 were suggested to be suitable for current exploitation, other part of these reserves were put aside for exploitation as their thick cover in 4 sites with 2.75Â ÃÂ 108Â m3, seriously contaminated cover in 1 site with 2.5Â ÃÂ 108Â m3 or ecological or environmental sensitivity in 5 sites with 5.38Â ÃÂ 108Â m3. This research results can give some overall description of marine sand resources in the Pearl River estuary waters and provide scientific base for macroscopic management. Gassy sediments recorded by acoustic turbidity change the geoacoustic properties of the seabed, weaken geophysical exploration effect, and have great engineering and environment significance.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Marine Systems - Volume 82, Supplement, August 2010, Pages S83-S89
Journal: Journal of Marine Systems - Volume 82, Supplement, August 2010, Pages S83-S89
نویسندگان
Qiaomin Zhang, Ping Wang, Wenjie Wang, Yixiang Zhang,