论文部分内容阅读
对东经90°海岭北部ODP758站位远洋沉积物进行了粒度分析,得到了3.6 Ma以来非碳酸盐组分的粒度变化曲线,得出在3.6~2.8 Ma之间,非碳酸盐组分的粒度以2μm为主;2.8Ma至今,粒度增大至3μm左右,并且比较稳定地保持增大趋势的结论,这与南亚冬季风的爆发和加强密切相关。印证了青藏高原的隆升对亚州季风的影响。
Particle size analysis of the oceanic sediments in the ODP 758 station in the north of the 90 ° east longitude has been done and the particle size curve of non-carbonate components since 3.6 Ma has been obtained. From 3.6 to 2.8 Ma, The grain size is mainly 2μm. From the 2.8Ma to the present, the particle size increases to about 3μm, and keeps the trend of increasing steadily. This is closely related to the onset and strengthening of the South Asian winter monsoon. Confirms the impact of the Qinghai-Tibet Plateau uplift on Asian monsoon.