Paleozoic and Mesozoic stratigraphic sequences in the Puerto Libertad area, NW Sonora, Mexico, are intruded by Laramide granitic plutons with dominantly alkaline affinity. We conducted a petrogenetic study of these bodies across a north-south 35 km long transect at oriented NW-SE which includes the Sierra Picú (SP), El Destierro (ED), Sierra Tordilla (ST) and Sierra Los Mochos (SLM). The intrusive bodies display abundant Mafic Microgranular Enclaves (MME) and are intruded by aplitic and pegmatitic dike swarms. U/Pb zircon dates of the intrusive rocks yield crystallization ages between 71.9 and 74.9 Ma. Granodioritic and mozogranitic rocks dominate the SP and ED, while syenogranitic rocks dominate the ST and SLM regions. In addition, these rocks show notable effects, by normal and listric faults which includes cataclastic rocks. Geothermobarometry data from amphiboles and plagioclase of the granodiorites suggest that the temperatures and pressures reached 711–740 °C and 1.67–2.43 kb. respectively, and were emplaced at depths between ∼5 and 6 km. Geochemically, this magmatism shows a relatively high silica content (56–75 wt%), values of Sr/Y = 29–50, La/Yb = 26–39, Sr up to 600 ppm and Ba up to 1400 ppm and depleted in highfield strength elements. Collectively these geochemical traits accentuate the adakite signature of these rocks. This work raises the current problems related to the petrogenetic and tectonic aspects for the generation of calc-alkaline and adakitic magmas while proposing ternary discrimination diagrams to aid in the discrimination from classic calk-alkaline, adakites and adakitic affinity magmatism.

墨西哥索诺拉西北部利伯塔德港地区的古生代和中生代地层序列被具有主要​​碱性亲和力的拉拉米花岗岩体侵入。我们在一个南北 35 公里长的横断面上对这些天体进行了岩石成因研究，该横断面位于 NW-SE 方向，包括 Sierra Picú (SP)、El Destierro (ED)、Sierra Tordilla (ST) 和 Sierra Los Mochos (SLM)。侵入体显示出丰富的镁铁质微粒飞地（MME），并被斑晶岩和伟晶岩堤群侵入。侵入岩的U/Pb锆石年代产生的结晶年龄在 71.9 和 74.9 Ma 之间。花岗闪长岩和莫生花岗岩在 SP 和 ED 区占主导地位，而正花岗质岩石在 ST 和 SLM 区占主导地位。此外，这些岩石通过正常断层和利斯特断层其中包括碎裂岩。来自花岗闪长岩的闪石和斜长石的地热气压测量数据表明，温度和压力达到了 711-740 °C 和 1.67-2.43 kb。分别位于~5到6公里的深度。在地球化学上，这种岩浆作用显示出相对较高的二氧化硅含量（56-75 wt%），Sr/Y = 29-50，La/Yb = 26-39，Sr 高达 600 ppm，Ba 高达 1400 ppm，并且在高场强元件。这些地球化学特征共同突出了这些岩石的埃达克岩特征。这项工作提出了当前与钙碱性和埃达克质生成的岩石成因和构造方面相关的问题岩浆同时提出三元区分图，以帮助区分经典的粉碱、埃达克岩和埃达克亲和岩浆。