Los mármoles cálcicos de El Escorial (Complejo Metamórfico Cushamen, Macizo Norpatagónico): caracterización isotópica de 87Sr-86Sr y edad de sedimentación

نویسندگان

چکیده

The El Escorial marbles (Cushamen Metamorphic Complex) along with amphibolites form metamorphic septa within the permian granitoids of Mamil Choique Formation (261-286 Ma). metamorphism, determined in granulite facies migmatic gneisses cropping out 120 km southwest Escorial, occurs at 311 ± 27 Ma (CHIME method monazite). are calcitic (calcite > 95%, R.I.: 0.5 to 2.5%) and show 87Sr/86Sr values between 0.70768 0.70825 (n = 10). data provided this work, added previous contributions, allow constraints sedimentation age silicic-carbonate successions Cushamen Complex ca. 385 335 Ma. This suggests existence a mixed carbonate-siliciclastic platform least southernmost portion southwestern Gondwana Middle Devonian early Carboniferous (Middle Mississippian).

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Experiencias y obstáculos de los psicólogos en el acompañamiento de los procesos de fin de vida

Psychologists are responsible for the emotional care to patients who are in end-of-life processes. Little is known about the experiences, the obstacles and problems they face when addressing such complex situations, so the main objective of this research is to understand and explore what they are. A qualitative phenomenological design was performed, using semi structured interviews, which were ...

متن کامل

Hacia el Uso de la Información Sintáctica y Semántica en los Sistema de Búsqueda de Respuesta

Current question answering systems typically combine methods based in information retrieval and information extraction. Such methods leverage the speed of the resulting algorithms and the presence of information redundancy, but few systems use methods based on linguistic information beyond the word level. In this paper we present a study of the impact of the syntactic and semantic information i...

متن کامل

Importancia del lenguaje coloquial y de los símbolos de puntuación en el perfilado de autores

In recent years, author profiling (AP) has become a very relevant task for natural language processing (NLP). The main goal of 43 Research in Computing Science 115 (2016) pp. 43–56; rec. 2016-04-22; acc. 2016-05-15 AP is automatically determine demographic aspects from an author, for example, genre and age. In this paper we present a method for author profiling; particularly, we are interested ...

متن کامل

Utilización de redes neuronales en la caracterización, modelación y predicción de series temporales económicas en un entorno complejo

En el presente trabajo se realiza una revisión de las principales implicaciones del nuevo enfoque de la complejidad, y de sus relaciones con la no linealidad y la teoría del caos para el estudio de los problemas económicos. En particular, se analiza la incidencia del cambio de enfoque en el análisis de series temporales económicas, haciendo especial hincapié en la aplicación de la metodología d...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Andean Geology

سال: 2021

ISSN: ['0718-7106', '0718-7092']

DOI: https://doi.org/10.5027/andgeov49n1-3387