کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8063789 | 1520664 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Small-diameter vibrocorer for sediment coring beneath Antarctic ice shelves: General concept and testing
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی دریا (اقیانوس)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Small-diameter vibrocorer for sediment coring beneath Antarctic ice shelves: General concept and testing Small-diameter vibrocorer for sediment coring beneath Antarctic ice shelves: General concept and testing](/preview/png/8063789.png)
چکیده انگلیسی
Samples from beneath Antarctic ice shelves, ice streams, and subglacial lakes contain important paleoclimatic and paleoenvironmental records, and these environments also provide a unique habitat for life. This paper describes a small-diameter SUBglacial SEdiment Vibrocorer (SUBSEV) designed especially for coring sediments from beneath Antarctic ice shelves through an access hole formed with a hot-water drill. The maximum diameter of the SUBSEV corer is 270Â mm, the total length of the corer is 4.1Â m, it weighs 214Â kg, it is designed to sample at least 3Â m of sediment without disturbance, and it can work at water depths down to 3000Â m. A cylindrical, self-synchronous, dual-motor vibrator was designed to deal with the size restrictions of the hole. Actuating motors rotating in opposite directions can generate vertical, horizontal, or alternative vibrations. In the course of laboratory testing, the SUBSEV corer easily penetrated to a depth of 3.4Â m in a sediment composed of fine-screened sand, loess, and soil with a coring speed of 70-100Â mm/s. The maximum penetration speed was reached in the alternate vibration mode. Field testing of the SUBSEV corer is planned within a hot-water ice-drilling project on Amery Ice Shelf, East Antarctica in the 2017-2018 season.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ocean Engineering - Volume 126, 1 November 2016, Pages 232-239
Journal: Ocean Engineering - Volume 126, 1 November 2016, Pages 232-239
نویسندگان
Da Gong, Nan Zhang, Yunchen Liu, Xingchen Li, Pavel Тalalay,