GC/MS法追踪摇头丸杂质体系

本文运用GS/MS的总离子流法,选择离子法,对南京地区常见的几种摇头丸进行全面分析,找出与合成途径相关的痕量杂质,根据杂质情况初步确定其合成途径.     

The Triassic-Jurassic boundary in the Middle Eastern Levant: The magmatic event

The Asher Volcanism (207—189 Ma) represents a significant magmatic event, which since recent radiometric data, seem to straddle the Triassic/Jurassic boundary. Extending from the Mediterranean coast, across Galilee to Mount Hermon, the unusually thick volcanic sequence is interstratified with Late Triassic limestone and Early Jurassic shale. The event unfolded during an active phase of continental breakup in Gondwana, with the volcanism contemporaneous with the regional uplift of the Arabian Plate that caused denudation of the Triassic substratum, and sealed by a marked angular unconformity and development of laterites. A deep chasm filled with volcanics runs along an old NW-SE fault system characterizing the Arabian Plate and nearly perpendicular to the NE-SW Palmyrid aulacogen, which relates to an aborted breakaway of the Syrian promontory from mainland Gondwana. The volume of Asher volcanics may also reflect the role of volcanism in the T/J mass-extinction as proposed in 2004.