Western margin and provenance of sediments of the Neuquen basin (Argentina) in the Late Jurassic and Early Cretaceous
Western margin and provenance of sediments of the Neuquen basin (Argentina) in the Late Jurassic and Early Cretaceous
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DOI：
10.1016/0040-1951(95)00157-3
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发表时间：
1996-06-30
期刊：
影响因子：
2.9
通讯作者：
Rosenfeld, U
中科院分区：
文献类型：
--
作者：
Eppinger, KJ;Rosenfeld, U
内乌肯盆地（阿根廷）的晚侏罗世至早白垩世（138-117 Ma）沉积物部分来自西部的过渡到切割的岩浆区和南部至西南部的变质高地（北巴塔哥尼亚地块）。唯一的例外是年龄为128.5 Ma的沉积物，这也表明其来源于东部的再循环造山带（圣拉斐尔地块）。模态分析和重矿物分析反映了岩浆活动在区域和时间上的发展。在提托阶中，提供了典型的过渡性碎屑。在贝里阿斯阶中，碎屑来源于一个被切割的区域，在贝里阿斯阶的最上部又回到了它的过渡阶段。
The Late Jurassic to Early Cretaceous (138-117 Ma) sediments of the Neuquen Basin (Argentina) are in part derived from a transitional to dissected magmatic are in the west and a metamorphic highland (North Patagonian Massif) in the south to southwest. The only exceptions are the sediments 128.5 Ma in age, which also indicate a source from a recycled orogen (Block of San Rafael) in the east. Modal analyses and heavy-mineral analyses reflect the development of the magmatic are with regard to both region and time. In the Tithonian the are supplied debris typical of a transitional are. In the Berriasian the detritus originated from a dissected are, which returned to its transitional stage in the uppermost Berriasian.