Fieldwork, petrographic description and geochemistry are presented for the Upper Jurassic-Lower Cretaceous magmatic intrusions from the Mesozoic Eastern High Atlas in Morocco. The magmatic complexes are ellipsoid-shaped and a diapiric-dominated mechanism is suggested for the emplacement of the intrusions into Paleozoic faulted basement as well as in the overlying Triassic-Jurassic sedimentary rocks. The intrusions are massive and composed of mafic (olivine-, biotite-bearing gabbro, and ordinary gabbro), intermediate (diorite) and felsic (syenite) units.

The major and trace element contents indicate transitional to alkaline affinities for the mafic and intermediate intrusions and alkaline for the felsic ones, evolved in an intracontinental setting. The data indicate a heterogeneous mantle source, likely metasomatized sub-continental lithosphere that had been enriched by plume-type melts. The Eastern High Atlas intrusives are part of a continuum of magmatic events that spanned from the Triassic Central Atlantic Magmatic Province to the late-Jurassic to early-Cretaceous magmatism of the High Atlas system.

介绍了来自摩洛哥中生代东部高阿特拉斯的上侏罗纪-下白垩统岩浆侵入体的实地考察、岩石学描述和地球化学。岩浆杂岩呈椭球状，表明侵入体侵位古生界断层基底以及上覆三叠纪-侏罗纪沉积岩的机制是底辟为主。侵入体是巨大的，由镁铁质（含橄榄石、黑云母辉长岩和普通辉长岩）、中间（闪长岩）和长英质（正长岩）单元组成。

主要和微量元素含量表明基性和中间侵入体的过渡到碱性亲和力和长英质侵入体的碱性，在大陆内部环境中演化。数据表明一个异质的地幔来源，可能是交代的次大陆岩石圈，这些岩石圈已经被羽状熔体富集了。东部高阿特拉斯侵入岩是从三叠纪中大西洋岩浆区到高阿特拉斯系统晚侏罗纪到早白垩世岩浆活动的岩浆事件连续体的一部分。