The results of our regional and local studies of the Fecunditatis basin and Mare Fecunditatis, and areas adjacent to the Luna 16 landing site suggest the following. If the Fecunditatis basin is an ...impact structure, which is consistent with the crustal thickness models and gravity data, it predates the Nectaris basins (∼4.17 Ga). The unusually flat topographic profile of the Fecunditatis basin can be explained by viscous relaxation of the original topography of the basin and the subsequent filling of the basin by ejecta from the Nectaris and Crisium basins. The results of our crater size-frequency measurements within the mare domain of the Fecunditatis basin yield an absolute model age (AMA) of ∼3.81 Ga. Thus, the population of all recognizable craters within Mare Fecunditatis denotes the existence of an extensive episode/episodes of resurfacing that has erased the ancient crater population accumulated after the Fecunditatis impact event but before the mare emplacement. Our determinations of AMAs of the surface of Mare Fecunditatis (∼3.45 Ga) are consistent with most radiometric age determinations from the Luna 16 samples that are clustered at ages of ∼3.5–3.4 Ga. The current Mare Fecunditatis surface is likely to represent the latter episodes of volcanism, the main phase of which was active during this time interval. Although older radiometric ages have not yet been reported, the presence of older basalts in the Luna 16 sample should not be ruled out, taking into account the likely multiple sources of its materials and the complex nature of the emplacement of lavas in Mare Fecunditatis. The thickness of mare basalts in Mare Fecunditatis are highly variable. At the regional scale, thicknesses are most likely at least ∼1.5 km, in order to be able to hide a significant number of ancient larger craters. In the areas of partly or completely flooded craters, the mare thickness increases up to ∼2–2.7 km. In the vicinity of the Luna 16 landing site, however, the thickness of the most than a few hundred meters.
•The unusual topographic profile of the Fecunditatis basin can be explained by viscous relaxation of the original topography.•Recognizable craters within Mare Fecunditatis suggest the existence of an extensive episode of resurfacing before the mare emplacement.•Our determinations of AMAs of the surface of Mare Fecunditatis (∼3.45 Ga) are consistent with most radiometric age determinations from the Luna 16 samples (∼3.5–3.4 Ga).•Older radiometric age of Mare Fecunditatis materials should not be ruled out.
This paper is based on a study of sociocultural intervention of art in the current global and local problems, as it takes shape in the work of the Peruvian artist Rustha Luna Pozzi.-Escot (Lima, ...1973), specifically through his "Armed Women" project, presented in the last 10-years at various exhibitions and performances in Peru, France and Germany. These are representations of the woman fighter, who transforms her traditional everyday referents into signs of combat, to assume an active and transforming role in society, re-meaning her story.
This paper is based on a study of sociocultural intervention of art in the current global and local problems, as it takes shape in the work of the Peruvian artist Rustha Luna Pozzi.-Escot (Lima, ...1973), specifically through his "Armed Women" project, presented in the last 10-years at various exhibitions and performances in Peru, France and Germany. These are representations of the woman fighter, who transforms her traditional everyday referents into signs of combat, to assume an active and transforming role in society, re-meaning her story. Keywords: reference/ critical art / woman / instance / semiotics. La ponencia se basa en el estudio de la intervencion sociocultural del arte en la problematica actual global y local, segun toma forma en la obra de la artista peruana Rustha Luna Pozzi.-Escot (Lima, 1973), especificamente a traves de su proyecto "Mujeres Armadas", presentado en los ultimos 10 anos en varias exposiciones y performances en el Peru, Francia y Alemania. Se trata de representaciones de la mujer luchadora, que tranforma sus referentes cotidianos tradicionales en signos de combate, para asumir un rol activo y tranformador en la sociedad, re-significando su historia. Palabras clave: referencia / arte critico / mujer / instancia / semiotica.
Cáncer y sus mecenas González Maya, Juan Carlos
Hipogrifo (New York, NY),
06/2024, Letnik:
12, Številka:
1
Journal Article
Odprti dostop
The poet Jerónimo de Cáncer y Velasco is known above all as a come-diographer and “entremesista”, genres in which he made his fame, but occasionally, as he tells us, he found it necessary to beg. ...From there arose his poetry of patronage, somewhere between the praise or vituperation of people of the courtly circle of Philip IV, and his self-portrait with burlesque overtones. The results of his reception were unequal and in them one can also glimpse the meanness of the aristocracy. His most direct dealings were with Don Gaspar Alonso Pérez de Guzmán el Bueno, IX Duke of Medina Sidonia, and with his son Gaspar Juan Alonso Pérez de Guzmán el Bueno, XIV Count of Niebla, to whom he asked for help for the publication of his Obras varias (1651). He maintained a cordial and complimentary relationship with them. His second protector was Don Antonio Alfonso Pimentel, IX Count of Luna, the firstborn of the Count-Duke of Benavente, with whom he seems to have been one of the accountants of his house, but with whom he had a more complicated relationship due to the degree of abandonment to which he was subjected. Unfor-tunately, it has not been possible to confirm these data in the consultations with the archives of the Medina Sidonia Foundation and Nobility
El poeta Jerónimo de Cáncer y Velasco es conocido sobre todo como comediógrafo y entremesista, géneros donde labró su fama, pero ocasionalmente, y según él mismo nos cuenta, se vio en la necesidad de pedir. De ahí surge su poesía de mecenazgo, a camino entre el elogio o vituperio de personas del círculo cortesano de Felipe IV, y su autorretrato con tintes burlescos. Los resultados de su acogida fueron desiguales y en ellos se puede vislumbrar también la mezquindad de la aristocracia. Su trato más directo fue con don Gaspar Alonso Pérez de Guzmán el Bueno, IX duque de Medina Sidonia, y con su hijo don Gaspar Juan Alonso Pérez de Guzmán el Bueno, XIV conde de Niebla, a los que pedía ayuda para la publicación de sus Obras varias (1651). Con ellos mantiene un trato cordial y elogioso. Su segundo protector fue don Antonio Alfonso Pimentel, IX conde de Luna, primogénito del conde-duque de Benavente, de quien parece fue uno de los contadores de su casa, pero con quien tuvo una relación más complicada por el grado de abandono al que lo tenía sometido. Lamentablemente, no se han podido confirmar estos datos en las consultas a los archivos de la Fundación Medina Sidonia y de Nobleza
En la serie de cuadernos del seminario de la Universidad Nacional Autónoma de México, “Modernidad: versiones y dimensiones”, dirigido por Marta Lamas y que ha sido coordinado anteriormente por Raquel ...Serur y por su fundador Bolívar Echeverría, Andrés Luna Jiménez, un joven historiador, ha publicado un libro notable: Figuras de la crítica: la (de)formación del sujeto como problema histórico en Marcuse, Foucault y Butler. El libro contiene virtudes difíciles de alcanzar en la academia actual: muestra una clara voz autoral; un hilo argumental sostenido, profundo y, a la vez, pedagógico; y actualiza con sutileza los debates, los enfrenta y los coloca bajo una perspectiva abierta a la investigación filosófica contemporánea.
The works of popular Spanish film directors Julio Medem, Juan Jose Bigas Luna, and Jose Luis Guerin are newly appraised in relation to their engagement with alternative national and cinematic ...subjectivities. Their films examine the limitations of the cinematic gaze, as the author shows, highlighting the ways in which these directors make recourse to hybridity, contact, and interface to overcome the binary power dynamic previously thought to be a feature of cinema. This book explores their status as solely "Spanish" filmmakers while focusing on their diverse and immensely creative output, offering new readings that engage with current debates in visual culture surrounding psychoanalytic theory, phenomenology, and theories of documentary practice.
•Statistics of 269 K–Ar datings of lunar highland returned samples are reviewed.•These are compared against 94 datings of meteoritic highland rocks from 21 localities.•Cumulative effect of impact ...gardening on presence of melt at surface is modelled.•Combined modelling and analysis contradicts idea of a short terminal cataclysm.
This work revisits the hypothesis of the so-called ‘lunar terminal cataclysm’ suggested by Tera et al. (1973, 1974) as a strong peak in the meteorite bombardment of the Moon around 3.9 Ga ago. According to the hypothesis, most of the impact craters observed on the lunar highlands formed during this short time period and thus formed the majority of the lunar highland impact breccias and melts. The hypothesis arose from the observation that the ages of highland samples from all the lunar missions are mostly grouped around 3.9–4.0 Ga. Since those missions, however, radiometric dating techniques have progressed and many samples, both old and new, have been re-analyzed. Nevertheless, the debate over whether there was a terminal cataclysm persists. To progress in this problem we summarized results of 269 K–Ar datings (mostly made using the 40Ar–39Ar technique) of highland rocks represented by the Apollo 14, 15, 16, 17 and Luna 20 samples and 94 datings of clasts of the highland rocks from 23 lunar meteorites representing 21 localities on the lunar surface, and considered them jointly with the results of our modelling of the cumulative effect of the impact gardening process on the presence of impact melt of different ages at the near-surface of the Moon.
The considered results of K–Ar dating of the Apollo-Luna samples of lunar highland rocks confirmed a presence of strong peak centered at 3.87 Ga. But since the time when the hypothesis of terminal cataclysm was suggested, it has become clear that this peak could be a result of sampling bias: it is the only prominent feature at the sites with an apparent domination of Imbrium basin ejecta (Apollo 14 and 15) and the age pattern is more complicated for the sites influenced not only by Imbrium ejecta but also that of other basins (Nectaris at the Apollo 16 site and Serenitatis at the Apollo 17 site). Our modelling shows that the cataclysm, if it occurred, should produce a strong peak in the measured age values but we see in the considered histograms and relative probability plots not only the 3.87 Ga peak (due to Imbrium basin), but also several secondary peaks caused by the formation of other basins distributed between 3.87 and 4.25 Ga.
The lunar terminal cataclysm hypothesis is in disagreement with the distribution of K–Ar ages for the highland rocks of the lunar meteorites. The population of lunar meteorites representing localities randomly distributed over the lunar surface, and thus free from the mentioned sampling bias, shows no ∼3.9 Ga peak as it should, if the cataclysm did occur.
We conclude that the statistics of sample ages contradict the terminal cataclysm scenario in the bombardment of the Moon. We also see evidence for the formation of several impact basins between 3.87 and 4.25 Ga which is likewise incompatible with the hypothesis of a short interval cataclysm. There remain other basins, including the largest South Pole – Aitken, the ages of which should be determined in future studies to further clarify the impact history. Sample-return missions targeted to date several key basins need to be planned, and the continued study of lunar meteorites may also bring new details to the general view of the impact bombardment of the Moon.
Juan Luna was a major force of painting tradition in the Philippines particularly in the late 19th Century. Like his colorful paintings, his life was also interestingly complicated which scholars ...and historians were fond of studying about. His paintings are known to be packed with symbolism. In this study, I tried to interpret the painter's works and the intricacies of his life as a nationalist and as a private person. By employing semiotic-hermeneutic interpretation, an exposition of various symbols embedded in his works and what they signify was made. As gleaned in the works interpreted, messages and contents were conveyed and made powerful through his visual metaphors. Apparently, Luna concealed his nationalistic ideas and his innermost feelings in his work.
The formation ages of lunar impact basins are critical to understanding the late accretion history of the inner solar system. Furthermore, the correct interpretation of the provenance and isotopic ...dates of basin-derived impact melt (‘basin melt’) is essential for the calibration of lunar chronology function. However, abundances of basin melt in the lunar near-surface are not well understood. Basin melt has been gardened by a long sequence of subsequent impact events, altering its abundance and size distribution. We developed a numerical model to investigate this process by means of the Monte Carlo method in a spatially resolved model. The fraction of melt in ejecta was tracked globally and at the Apollo 14–17 and Luna 20 sampling sites and was compared with K-Ar age distributions of lunar impact melt breccias. It was found that melt produced by the very large SPA basin as well as the relatively late-forming Imbrium basin should be dominant in the near-surface (top one meter). The simulation shows that the melt component at the Apollo 14–17 and Luna 20 sites is strongly affected by nearby mid- to late-forming basins. Imbrium melt should be abundant in Apollo 14–17 samples; Crisium melt is the most significant component of basin-sourced melt in Luna 20 samples; all the Apollo 14–17 and Luna 20 samples could include melt from Serenitatis and the SPA basin; Nectaris melt should occur in Apollo 16, Apollo 17 and Luna 20 samples; and Orientale melt has no significant mixing in the Apollo 14–17 and Luna 20 sampling sites. In general, besides a prominent age peak at 3.9 Ga (related to the Imbrium basin), the model predicts pronounced abundance peaks of older basin melt (>3.9 Ga) which tend to be absent from distributions of K-Ar ages of impactites from landing sites. The diffusion characteristics of basin melt suggest that for future sampling aimed at collecting early basin melt, the re-excavation zones of late impact craters larger than tens of kilometer in diameter inside basins may provide the highest abundances of melt from early basins.
•Impact gardening of basin melt modeled in 3D to estimate present surface abundance•Estimate relative abundances of differently-aged melt at Apollo/Luna sampling sites•Surface melt abundance strongly affected by nearby late-forming basins•Deficiency of ancient melt compared to aggregated K-Ar sample age distribution
The paper presents pioneering data on the comparative study of impact glasses from the Zhamanshin crater and lunar regolith (delivered by the Luna 16, 20, and 24 probes). The data were acquired using ...analytical techniques of ultrahigh spatial resolution. Many of the melt and condensate impact glasses, both terrestrial and lunar, are similar in inner structure and composition, which were controlled primarily by the physics of the impacts and similar compositions of the targets.
