Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1130/B31676.1 |
Early Neogene unroofing of the Sierra Nevada de Santa Marta, as determined from detrital geothermochronology and the petrology of clastic basin sediments | |
Piraquive, Alejandro1,2; Pinzon, Edna2; Kammer, Andreas2; Bernet, Matthias1; von Quadt, Albrecht3 | |
2018-03-01 | |
发表期刊 | GEOLOGICAL SOCIETY OF AMERICA BULLETIN |
ISSN | 0016-7606 |
EISSN | 1943-2674 |
出版年 | 2018 |
卷号 | 130页码:355-380 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Colombia; Switzerland |
英文摘要 | We used geothermochronologic data from sedimentary rocks, coupled with strati-graphic analyses, to unravel the late Paleogene to early Neogene exhumation of the Sierra Nevada de Santa Marta massif. This fault-bounded triangular northernmost promontory of the Northern Andes exposes Precambrian to Paleozoic metamorphic rocks and a Triassic to Jurassic magmatic arc. We examined the Neogene basin fills of two marginal basins, a western one located along the Santa Marta-Bucaramanga fault, and a northern one occupying the southern hanging-wall block of the Oca fault. The western sequence consists of similar to 1200- m-thick conglomeratic gravity deposits that define a progradational Gilbert-type delta emanating from a scarp coinciding with the present Santa Marta-Bucaramanga fault. By its stratigraphic and structural position, this sequence is similar to the northern sequence, which reveals a retrogradational stacking pattern. In order to reconcile these different architectural styles, we propose a regional-scale tilting of the Sierra Nevada de Santa Marta massif toward the NE during the late Paleogene-early Neogene. This model presumes a concomitant evolution of the two sedimentary sequences. Provenance analyses performed on representative units of these sedimentary sections yielded U-Pb age spectra of zircons that correlate with known age data of the underlying basement. Particularly, they lack pre-Grenvillian and Ordovician signals common to Neogene sediments of the wider Miocene Magdalena basin. These marginal basins thus evolved disconnected from the trunk system of the proto-Magdalena River, and they record an initial stage of Oligocene-Miocene segmentation of the South American plate margin. These new findings help to better constrain the paleogeographic setting of the Sierra Nevada de Santa Marta massif and its marginal basins for the late Oligocene-early Neogene during initial breakup of the Caribbean margin. Their sedimentary record depicts an early stage of fault-controlled subsidence of the western margin and a presumably tilt-related transgression of the northern margin that preceded the Miocene expansion of local depocenters and their merging into a wider embayment of the Neogene Lower Magdalena basin. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427362500001 |
WOS关键词 | NORTHWESTERN SOUTH-AMERICA ; HUMMOCKY CROSS-STRATIFICATION ; MIDDLE MAGDALENA VALLEY ; ZIRCON FISSION-TRACK ; LLORENC-DEL-MUNT ; GULF-OF-MEXICO ; NORTHERN ANDES ; U-PB ; COLOMBIAN ANDES ; TECTONIC EVOLUTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/24687 |
专题 | 地球科学 |
作者单位 | 1.Univ Grenoble Alpes, Inst Sci Terre, 1381 Rue Piscine, F-38400 St Martin Dheres, France; 2.Univ Nacl Colombia, Grp Invest Geol Estruct & Fracturas, Bogota 14490, Colombia; 3.ETH Zentrum, Inst Geochem & Petrol, Dept Earth Sci, Clausiusstr 25, CH-8092 Zurich, Switzerland |
推荐引用方式 GB/T 7714 | Piraquive, Alejandro,Pinzon, Edna,Kammer, Andreas,et al. Early Neogene unroofing of the Sierra Nevada de Santa Marta, as determined from detrital geothermochronology and the petrology of clastic basin sediments[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2018,130:355-380. |
APA | Piraquive, Alejandro,Pinzon, Edna,Kammer, Andreas,Bernet, Matthias,&von Quadt, Albrecht.(2018).Early Neogene unroofing of the Sierra Nevada de Santa Marta, as determined from detrital geothermochronology and the petrology of clastic basin sediments.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,130,355-380. |
MLA | Piraquive, Alejandro,et al."Early Neogene unroofing of the Sierra Nevada de Santa Marta, as determined from detrital geothermochronology and the petrology of clastic basin sediments".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 130(2018):355-380. |
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