论文部分内容阅读
利用显微探针分析不同构造环境下深海砂中的斜长石样品,可以得到斜长石成分的平均变化范围:An含量由大陆拖曳边缘的19％到岛弧外侧大洋盆地的56％;除岛弧区外,其他任何构造环境中均发现有很多纯纳长石。这些纳长石颗粒可能为早期沉积岩再造的产物。能指示火山源的富钾斜长石在深海砂中的含量比根据它在火山岩中所占的比例所推测的含量要少。可能这些高钾斜长石的抗风化能力低于低钾斜长石。
Microscopic probe analysis of plagioclase samples from deep sea sand under different tectonic settings revealed an average range of plagioclase composition variation: An content was from 19% of the trailing edge of the continent to 56% of the outer ocean arc of the island arc Outside the island arc zone, many other purely nodules have been found in any tectonic setting. These nabkite particles may be the product of early sedimentary reengineering. The content of potassium-rich plagioclase indicating volcanic origin in deep-sea sand is less than what it presumed based on its proportion in volcanic rocks. It is possible that these high potassium plagioclase have less resistance to weathering than low potassium plagioclase.