尽管近十年来获得了大量有关第四纪,特别是晚更新世古海洋复原的资料,但印度洋近赤道地区仍然是研究程度相当低的。关于该海区表层水的变化存在着两种可供选择的观点:(1)在末次冰期极盛期和最佳间冰期,水温接近现代;(2)在寒冷期水温明显低于间冰期和全新世。有关印度洋北部溶解旋回与气候变化的相互关系问题也不够清楚。已具备有关温暖时期和寒冷初期溶解作用增强的资料(Peterson等,1985);在某些情况下很难进行这种相应的对比(如,1988年提出的K—28井岩心)。有关底层环境变化的资料亦很少。对解决古海洋学任务来说很重要的有关印度洋中玫瑰色Globigerinoides (Gs.)ruber d＇or-bigny层位消失问题仍然有争议。所有这些不清楚之处首先与很难从印度洋近赤道地区深海部分获得良好的碳酸盐沉积物连续剖面有关,这种难度是有孔虫溶跃面的位置相对不深以及再 Although there has been a great deal of information on the Quaternary, especially the late Pleistocene, the recovery of the paleo-ocean over the past decade, the degree of research in the Indian Ocean near the equator is still relatively low. There are two alternative views on the variation of surface water in the sea area: (1) the water temperature is close to the modern during the last ice age and the best interglacial period; (2) the water temperature in the cold period is obviously lower than the interglacial period and the new world. The issue of the interrelationship between dissolved cycles and climate change in the northern Indian Ocean is not clear enough. Information on enhanced dissolution during warm and cold periods is already available (Peterson et al., 1985); in some cases it is difficult to make such comparisons (eg K-28 cores proposed in 1988). There is also very little information on the underlying environmental changes. The issue of the disappearance of the ruber d’or-bigny horizons in the Indian Ocean that are important to the resolution of paleoceanographic tasks remains controversial. All of these ambiguities are, first of all, related to the difficulty in obtaining a good succession of continuous profiles of carbonate sediments from the deep-sea parts of the Indian Ocean near the equator, where the foraminiferal surface is relatively inhomogeneous and