Revised Timing of Cenozoic Atlantic Incursions and Changing Hinterland Sediment Sources during Southern Patagonian Orogenesis
Revised Timing of Cenozoic Atlantic Incursions and Changing Hinterland Sediment Sources during Southern Patagonian Orogenesis
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南巴塔哥尼亚造山运动期间新生代大西洋入侵和腹地沉积物来源变化的修正时间
DOI：
10.31223/osf.io/vqkds
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发表时间：
2019
期刊：
影响因子：
2.4
通讯作者：
M. Griffin
中科院分区：
文献类型：
--
作者：
J. Fosdick;R. VanderLeest;J. E. Bostelmann;Joel S. Leonard;R. Ugalde;J. L. Oyarzún;M. Griffin
来自阿根廷和智利新生代马卡兰-南方盆地的新的碎屑锆石U-Pb年代学数据~51°S建立了古新世-中新世前陆同造山地层的修正年代地层学，并记录了巴塔哥尼亚安第斯山脉腹地物源的上升和随后与大陆边缘的隔离。来自腹地古生代和晚侏罗世源区的锆石在大约60-44 Ma之间的上部损失表明，由于巴塔哥尼亚-富埃吉亚安第斯山脉的古近纪造山作用，沉积路线发生了重大转变。由侏罗纪火山岩和古生代变质沉积岩组成的腹地冲断板的颗粒比例的变化，提供了一个可追踪的信号，表明由于弧后褶皱冲断带的加宽，造山排水分流和地形隔离的长期变化。最年轻的碎屑锆石U-Pb年龄证实了马斯特里赫特-始新世地层的时代，但需要对上覆的部分新生代玄武岩在晚始新世和渐新世进行大量的年龄修正。上Río Turbio组记录了一次新发现的沿盆地边缘的最新始新世-渐新世(37-27 Ma)海侵，此前已发表的文献中将其定位为始新世中晚期。我们认为，这些矿床可能与大西洋沿岸遥远的单元有关，包括El Huemul组和较年轻的San Julián组，通过前陆盆地系统向东加深，最终在南安第斯山脉发生盆地范围的渐新世海洋侵入。上覆的Río Guillermo组记录了约24.3 Ma的构造生成粗粒碎屑的开始，以及自晚白垩世以来巴塔哥尼亚地台近端首次向完全非海相条件过渡，这可能标志着科迪勒式规模的上板块对板块汇聚和构造板块重组的响应。
New detrital zircon U-Pb geochronology data from the Cenozoic Magallanes-Austral Basin in Argentina and Chile ~51° S establish a revised chronostratigraphy of Paleocene-Miocene foreland synorogenic strata and document the rise and subsequent isolation of hinterland sources in the Patagonian Andes from the continental margin. The upsection loss of zircons derived from the hinterland Paleozoic and Late Jurassic sources between ca. 60 and 44 Ma documents a major shift in sediment routing due to Paleogene orogenesis in the greater Patagonian-Fuegian Andes. Changes in the proportion of grains from hinterland thrust sheets, comprised of Jurassic volcanics and Paleozoic metasedimentary rocks, provide a trackable signal of long-term shifts in orogenic drainage divide and topographic isolation due to widening of the retroarc fold-thrust belt. The youngest detrital zircon U-Pb ages confirm timing of Maastrichtian-Eocene strata but require substantial age revisions for part of the overlying Cenozoic basinfill during the late Eocene and Oligocene. The upper Río Turbio Formation, previously mapped as middle to late Eocene in the published literature, records a newly recognized latest Eocene-Oligocene (37-27 Ma) marine incursion along the basin margin. We suggest that these deposits could be genetically linked to the distally placed units along the Atlantic coast, including the El Huemul Formation and the younger San Julián Formation, via an eastward deepening within the foreland basin system that culminated in a basin-wide Oligocene marine incursion in the Southern Andes. The overlying Río Guillermo Formation records onset of tectonically generated coarse-grained detritus ca. 24.3 Ma and a transition to the first fully nonmarine conditions on the proximal Patagonian platform since Late Cretaceous time, perhaps signaling a Cordilleran-scale upper plate response to increased plate convergence and tectonic plate reorganization.
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影响因子：
18.3
作者：
P. Stocchi;C. Escutia;A. Houben;B. Vermeersen;P. Bijl;H. Brinkhuis;R. DeConto;S. Galeotti;S. Passchier;D. Pollard;A. Klaus;Annick Fehr;T. Williams;J. Bendle;S. Bohaty;S. Carr;R. Dunbar;J. Flores;J. Gonzàlez;T. Hayden;M. Iwai;F. Jiménez-Espejo;K. Katsuki;G. Kong;R. McKay;M. Nakai;M. Olney;S. Pekar;J. Pross;C. Riesselman;U. Röhl;T. Sakai;P. Shrivastava;C. Stickley;S. Sugisaki;L. Tauxe;S. Tuo;T. Flierdt;K. Welsh;M. Yamane
通讯作者：
P. Stocchi;C. Escutia;A. Houben;B. Vermeersen;P. Bijl;H. Brinkhuis;R. DeConto;S. Galeotti;S. Passchier;D. Pollard;A. Klaus;Annick Fehr;T. Williams;J. Bendle;S. Bohaty;S. Carr;R. Dunbar;J. Flores;J. Gonzàlez;T. Hayden;M. Iwai;F. Jiménez-Espejo;K. Katsuki;G. Kong;R. McKay;M. Nakai;M. Olney;S. Pekar;J. Pross;C. Riesselman;U. Röhl;T. Sakai;P. Shrivastava;C. Stickley;S. Sugisaki;L. Tauxe;S. Tuo;T. Flierdt;K. Welsh;M. Yamane
影响因子：
0.9
作者：
A. Varela;D. Poiré;T. Martin;A. Gerdes;F. Goin;J. Gelfo;S. Hoffmann;S. Hoffmann
通讯作者：
A. Varela;D. Poiré;T. Martin;A. Gerdes;F. Goin;J. Gelfo;S. Hoffmann;S. Hoffmann
早期中新世圣克鲁斯地层（阿根廷南方麦哲伦盆地）的古土壤和相关土壤生物群：重建古代陆地景观的多学科方法
影响因子：
--
作者：
Raigemborn, Maria Sol;Krapovickas, Veronica;Zucol, Alejandro F;Zapata, Luciano;Beilinson, Elisa;Toledo, Nestor;Perry, Jonathan;Lizzoli, Sabrina;Martegani, Lucia;Tineo, David E
通讯作者：
Tineo, David E
沉积物源揭示的弧后造山楔的侵蚀和构造演化：以渐新世 — 中新世巴塔哥尼亚安第斯山脉为例
影响因子：
2.9
作者：
Leonard, Joel S.;Fosdick, Julie C.;VanderLeest, Rebecca A.
通讯作者：
VanderLeest, Rebecca A.
影响因子：
5.8
作者：
Goddard, Andrea L. Stevens;Fosdick, Julie C.
通讯作者：
Fosdick, Julie C.