基于叶理学分析的安加斯塔科盆地晚中新世古气候推断:阿根廷萨尔塔Palo Pintada地层

IF 0.9 4区 地球科学 Q3 GEOLOGY
J. M. Robledo, M. Y. Horn, C. Galli, L. M. Anzótegui
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引用次数: 5

摘要

由Salta省晚中新世Palo Pintado组组成的陆相沉积岩,由于这一地质年代学区间的环境条件而引起了人们对古气候的极大兴趣。地质和古植物学资料表明,在Angastaco盆地的Palo Pintado组的沉积岩堆积过程中,与邻近和同时代的其他组相比,例如Playa del Zorro Aloformation (Catamarca的晚中新世)和Chiquimil (Tucumán的晚中新世),Salicas和Toro Negro组(都来自La Rioja的晚中新世),可能存在更湿润的条件。本研究通过对Palo Pintado组岩石所含叶片的边缘和叶面面积进行分析,得到了该地区的年平均气温(MAT)和年平均降水量(MAP)。结果值为:23.98°C和330.8 mm。这些结果与不同作者的解释是一致的,他们认为帕罗平塔多组可能是在相对潮湿的环境下沉积的,可能是由于降雨影响了当地的安加斯塔科盆地región。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Inferencias paleoclimáticas para el Mioceno tardío en la cuenca de Angastaco basadas en el análisis fisionómico foliar: Formación Palo Pintado, Salta, Argentina
The continental sedimentary rocks that constitute the Palo Pintado Formation of the late Miocene from Salta province, presents a great paleoclimatic interest due to the environmental conditions prevailing during this geochronologic interval. The geological and paleobotanical data suggest that during the sedimentary rocks accumulation of the Palo Pintado Formation (Angastaco Basin), wetter conditions would have existed comparing with other nearby and contemporary Formations, for example the Playa del Zorro Aloformation (late Miocene of Catamarca) and the Chiquimil (late Miocene of Tucumán), Salicas and the Toro Negro Formations (both from the late Miocene of La Rioja). In this study, the margin and the foliar area of the leaves contained on rocks from the Palo Pintado Formation are analyzed, in order to obtain the mean annual temperature (MAT) and the mean annual precipitation (MAP). The resulting values were: 23.98 °C and 330.8 mm. These results are coincident by the interpretation of different authors, who consider that the Palo Pintado Formation would have been deposited under a relatively humid environment, possibly as a consequence of the rains that affected locally the Angastaco basin región.
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来源期刊
Andean Geology
Andean Geology 地学-地质学
CiteScore
3.90
自引率
0.00%
发文量
17
审稿时长
>12 weeks
期刊介绍: This journal publishes original and review articles on geology and related sciences, in Spanish or English, in three issues a year (January, May and September). Articles or notes on major topics of broad interest in Earth Sciences dealing with the geology of South and Central America and Antarctica, and particularly of the Andes, are welcomed. The journal is interested in publishing thematic sets of papers and accepts articles dealing with systematic Paleontology only if their main focus is the chronostratigraphical, paleoecological and/or paleogeographical importance of the taxa described therein.
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