The Yelapa-Chimo Metamorphic Complex forms part of the Jalisco Block in western Mexico and exposes a wide range of Early Cretaceous metamorphic rocks; such as paragneiss, orthogneiss, amphibolites and migmatites. However, the pressure–temperature (P–T) conditions of metamorphism and partial melting still remain poorly studied in the region. To elucidate metamorphic P–T conditions, phase equilibrium modelling was applied to two sillimanite–garnet paragneisses, one amphibole–orthogneiss and one amphibolite. Sillimanite–garnet paragneisses exhibit a lepidoblastic texture with a biotite + sillimanite + kyanite + garnet + quartz + plagioclase + K-feldspar mineral assemblage. Amphibole–orthogneiss and amphibolite display a nematoblastic texture with an amphibole + (1) plagioclase + quartz + (1) titanite assemblage and an amphibole + (2) plagioclase + (2) titanite + ilmenite retrograde mineral assemblage. Pseudosections calculated for the two sillimanite–garnet paragneiss samples show P–T peak conditions at ∼6–7.5 kbar and ∼725–740 °C. The results for amphibole–orthogneiss and the amphibolite yield P–T peak conditions at ∼8.5–10 kbar and ∼690–710 °C. The mode models imply that metasedimentary and metaigneous units can produce up to ∼20 vol. % and ∼10 vol. % of melt, respectively. Modelling within a closed system during isobaric heating suggests that melt compositions of metasedimentary and metaigneous units are likely to have direct implications for the petrogenesis of the Puerto Vallarta Batholith. Our new data indicate that the Yelapa-Chimo Metamorphic Complex evolved through a metamorphic gradient between ∼23–33 °C km^-1 and the metamorphic rocks formed at depths between ∼22 and ∼30 km with a burial rate of ∼2.0 km Ma^-1. Finally, the P–T data for both metasedimentary and metaigneous rocks provide new constraints on an accretionary framework, which is responsible for generating metamorphism and partial melting in the Yelapa-Chimo Metamorphic Complex during the Early Cretaceous.

Yelapa-Chimo变质复合体形成了墨西哥西部哈利斯科州区块的一部分，并暴露了范围广泛的早白垩世变质岩。如帕拉尼格斯，直生片麻岩，角闪石和辉锰矿。然而，在该地区，变质作用和部分熔融的压力-温度（PT）条件仍然缺乏研究。为了阐明变质对叔在这种情况下，相平衡模型被应用于两种硅线石-石榴石石蜡，一种角闪石-直链片岩和一种角闪石。硅线石–石榴石的paragneisses具有黑闪石质纹理，包括黑云母+硅线石+蓝晶石+石榴石+石英+斜长石+钾长石矿物组合。角闪石-长片麻岩和角闪石具有线虫+（1）斜长石+石英+（1）钛矿组合和角闪石+（2）斜长石+（2）钛矿+钛铁矿逆行矿物组合的线虫质地。两个硅线石石榴石副片麻岩样品计算拟断面显示对叔在~6-7.5千巴和~725-740℃的峰的条件。为角闪石片麻岩和闪产量的结果对-叔峰值条件约为8.5-10 kbar，约为690-710°C。该模式模型暗示，沉积和亚火成岩单元最多可产生约20 vol。％和〜10 vol。分别为熔体的％。在等压加热过程中，密闭系统内的模型表明，沉积沉积和亚火成岩单元的熔体成分可能直接影响瓦拉塔港基岩的成岩作用。我们的新的数据表明，的Yelapa-奇姆诺变质杂通过变质梯度~23-33℃下公里之间演变^-1，并在约22之间的深度形成的变质岩和约30公里，〜2.0公里马的埋藏速率^{- 1}。最后，PT 沉积沉积和变质岩的数据对增生框架提供了新的约束，这在白垩纪早期的耶拉帕－奇莫变质复合体中产生了变质作用和部分融化。