长江上游沱沱河源区多年冻土发育特征
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Characteristics of permafrost in Tuotuo River source area of upper Yangtze River
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图3. TTH-18与TTH-19岩芯照片和地温曲线:TTH-18(a)和TTH-19(b)钻孔地表以下6 m深度内岩芯照片;TTH-18岩芯在14.0~14.1m的地下冰照片(c);(d)和(e)分别是(a)和(b)红色框放大图;TTH-18和TTH-19的地温曲线(观测时间均为2021年5月11日,成孔时间分别为2020年10月28日和2020年11月19日,护孔方法均为填土法)(f) |
Fig. 3. Core photos and geothermal curves of TTH-18 and TTH-19: core photos of TTH-18 (a) and TTH-19 (b) at a depth of 6 m below the surface of the borehole; TTH-18 core photo of ground ice at 14.0~14.1 m (c); (d) and (e) are enlarged views of red boxes (a) and (b) respectively; geothermal curves of TTH-18 and TTH-19 (both observation time May 11th, 2021, and the hole-forming times are October 28th, 2020 and November 19th, 2020, respectively, and the hole protection methods are all filling methods) (f) |
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