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EXPLORATION ON THE EVAPORATE SEDIMENT IN THE SLOPE OF THE NORTHERN MARGIN OF THE SOUTH CHINA SEA
Author(s): YAO Bochu
Pages: 43-
50
Year: 2000
Issue:
1
Journal: MARINE GEOLOGY & QUATERNARY GEOLOGY
Keyword: 陆坡; 层速度; 变形沉积; 蒸发盐;
Abstract: 在南海北部陆缘东部、台湾浅滩以南的陆坡上,海底水深1 000 ~3 000 m,海底坡度较小,平均8.6×10-3.从穿过这里的地震剖面上看,新生代早期( 晚渐新世)有一套沉积(T7-T8)发生过强烈变形,其内部无反射,只有杂乱的噪声.从地震声纳浮标探测的结果看,这套沉积的层速度为4.98 km/s.由于这套沉积的变形,使上覆沉积也发生了变形.将这套沉积和大西洋边缘的蒸发盐沉积对比,发现其反射特征和层速度极为相似. 因此,推测它为发生在海底扩张初期的蒸发盐沉积.
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