中文摘要：

Maomaogou 霞石正长岩在 Emeishanlarge 火的省的内部地区被定位并且与 Emeishan 暗岩展出恼人的接触。从这正长岩在锆石上标明日期的虾 U-Pb 产出 261.6 ± 4 .4 妈的年龄，与分层的侵入和爆发抑制了 bystratigraphic 数据的 Emeishan 暗岩变老的 thePanzhihua 的年龄一致。Geochemical 数据进一步建议 Maomaogou 正长岩有来源类似物到 Emeishan 暗岩，并且可能被在更低的外壳中的 gabbroic cumulatesunderplated 的部分融化形成了。作为 s 结果，时间、空间的关系和 petrogeneticconstraints 为在暗岩之间的基因连接提供证据，在 Panxi 区域的 mafic/ultramafic andintermediate/acidic intrusives。

英文摘要：

The Maomaogou nepheline syenite is located at the inner zone of the Emeishan large igneous province and exhibits intrusive contact with the Emeishan basalts. SHRIMP U-Pb dating on zircons from this syenite yields an age of 261.6±4.4 Ma, in agreement with the age of the Panzhihua layered intrusion and the eruption age of the Emeishan basalts as constrained by stratigraphic data. Geochemical data further suggest that the Maomaogou syenite has a source analogue to the Emeishan basalt, and may have been formed by partial melting of gabbroic cumulates underplated in the lower crust. As s result, temporal and spatial relationships and petrogenetic constraints provide evidence for the genetic link between basalts, mafic/ultramafic and intermediate/acidic intrusives in the Panxi area.