The thermal maturity from the early Paleozoic strata in Northwestern Argentina was studied using reflected light microscopy and Rock-Eval analyses. The graptolites were collected from the Acoite and Lipeón formations, from the Los Colorados section, Cordillera Oriental, and the Huaytiquina, and Muñayoc sections, Puna highland, corresponding to the "Coquena" Formation and the Cochinoca-Escaya Magmatic-Sedimentary Complex. Rock-Eval parameters were unreliable due to the low TOC, S1, and S2 values. The Cordillera Oriental region sediments have low maturity based on low reflectance (%GRo= 0.63%-1.11%) and anisotropy of graptolite. In contrast, the higher graptolite reflectance of samples from the Muñayoc and Huaytiquina sections (%GRo= 5.57%-6.62%), in the Puna region, indicates considerably higher maturity. This could result from the combination of hydrothermal fluids with a temperature range from 336 °C to 358 °C, associated volcanism, and deformation related to tectonics events, which produced a higher geothermal gradient in the Puna. The Los Colorados section's thermal maturity modeling shows a better fit considering erosion episodes at the Late Paleozoic and Early Cenozoic. However, more studies about geothermal parameters and stratigraphy are necessary to corroborate these preliminary models and propose new approaches for the Puna region.

使用反射光显微镜和Rock-Eval分析研究了阿根廷西北部早古生代地层的热成熟度。石墨岩是从普斯科拉高地的洛斯科罗拉多地区和东方科迪亚拉的Acoite和Lipeón地层中采集的，对应于“ Coquena”地层和Cochinoca-Escaya岩浆-沉积复合体，在Puna高地。由于较低的TOC，S1和S2值，Rock-Eval参数不可靠。东方山脉地区的沉积物由于反射率低（％GRo = 0.63％-1.11％）和方解石的各向异性而具有较低的成熟度。相比之下，在普纳地区，Muñayoc和Huaytiquina切片的样品的笔脚石反射率更高（％GRo = 5.57％-6.62％），表明成熟度更高。这可能是由于温度范围从336°C到358°C的热液，相关的火山作用以及与构造事件有关的变形的组合，从而在Puna中产生了较高的地热梯度。考虑到古生代晚期和新生代的侵蚀事件，Los Colorados部分的热成熟度模型显示出更好的拟合度。但是，有必要对地热参数和地层进行更多的研究，以证实这些初步模型并为普纳地区提出新的方法。考虑到古生代晚期和新生代的侵蚀事件，热成熟度模型显示出更好的拟合度。但是，有必要对地热参数和地层进行更多的研究，以证实这些初步模型并为普纳地区提出新的方法。考虑到古生代晚期和新生代的侵蚀事件，热成熟度模型显示出更好的拟合度。但是，有必要对地热参数和地层进行更多的研究，以证实这些初步模型并为普纳地区提出新的方法。