Assemblage characteristics of clay minerals and its implications to evolution of eolian dust input to the Parece Vela Basin since 1.95 Ma

为了理解 eolian 的起源和进化，在东方菲律宾的海在 Parece 船帆座盆在最后 1.95 妈输入，从盆的严肃核心 PV090510 的泥土矿物质集合用 paleogeomagnetic 标明日期和 X 光检查衍射被调查。核心的集合主要由绿土(46%) 和 illite (40%) 组成了，与某绿泥石(10%) 和 kaolinite (4%) 。这些矿物质的起源的分析建议当 illite，绿泥石，和 kaolinite 被东方亚洲季风主要从中亚作为 eolian 灰尘搬运时，那绿土主要从马里亚纳群岛弧的暴烈的岩石被导出。我们使用了比率(illite+chlorite+kaolinite ) 是的 /smectite 为到 Parece 船帆座盆的亚洲 eolian 输入的一个代理自从 1.95 妈。这比率跟随了冰川、间冰期的周期并且自从 1.95 妈，与东方亚洲季风的紧张和中亚的干旱一致。比率的变化反映了东方亚洲季风和起源气候的三个不同阶段。

To understand the provenance and evolution of eolian input in the last 1.95 Ma in the Parece Vela Basin in the eastern Philippine Sea, the clay mineral assemblage of a gravity core PV090510 from the basin was investigated using paleogeomagnetic dating and X-ray diffraction. The assemblage of the core mainly consisted of smectite （-46%） and illite （-40%）, with some chlorite （-10%） and kaolinite （-4%）. Analysis of the provenance of these minerals suggested that smectite was mainly derived from volcanic rocks of the Mariana Arc, while illite, chlorite, and kaolinite were mainly transported as eolian dust by the East Asian monsoon from central Asia. We used the ratio of （illite＋chlorite＋kaolinite）/smectite as a proxy for Asian eolian input to the Parece Vela Basin since 1.95 Ma. This ratio followed glacial and interglacial cycles and was consistent with the intensity of the East Asian monsoon and aridity of central Asia since 1.95 Ma. The changes of the ratio reflected three different stages of the East Asian monsoon and provenance climate.