Arid
DOI10.1016/j.gloplacha.2016.11.016
Western Tethys continental-marine responses to the Carnian Humid Episode: Palaeoclimatic and palaeogeographic implications
Lopez-Gomez, J.1; Escudero-Mozo, M. J.1; Martin-Chivelet, J.1,2; Arche, A.1; Lago, M.3; Gale, C.3
通讯作者Lopez-Gomez, J.
来源期刊GLOBAL AND PLANETARY CHANGE
ISSN0921-8181
EISSN1872-6364
出版年2017
卷号148页码:79-95
英文摘要

This case-study examines correlations in the continental-marine sedimentary record for the Late Triassic Carnian Humid Episode in the western Tethys domain of present-day E Spain and islands of Majorca and Minorca.


The study area was divided into five sectors from west to east. Sectors 1 to 3 comprise the continental sedimentary record of this humid episode in eastern Iberia, which is represented by the three subunits (K-2.1, K-2.2 and K-2.3) of the K-2 Fm or Manuel Fm; each subunit records a fluvial episode with marine intercalations in distal areas. Sector 4 corresponds to Majorca Island and represents volcaniclastic input into a marginal continental marine transitional environment. Finally, sector 5 on Minorca Island comprises a karst surface developed on middle ramp deposits of the Arenal d’en Castell Fm, and separating this formation from the overlying Fontanelles Fm. Based on the ages of the units, estimated through palynomorph assemblages and ammonites, the Carnian Humid Episode was located in both the continental and marine sedimentary records.


A detailed sedimentary study focused on fades analysis identified allogenic controls on both continental and marine records. Hence, in continental areas influenced by sea-level fluctuations, fluvial deposits appear integrated within standard lowstand, transgressive and highstand system tracts. This connection based on sedimentary sequences and unit ages indicates that subunits K-2.1 and K-2.2 are represented by a karst surface on the subaerially exposed shallow marine deposits, while subunit K-2.3 already reflects a return to the normal Late Triassic semi-arid to arid conditions that laterally correspond to the transgressive stage represented by the Fontanelles Fm in sector 5.


Late Triassic tectonics activated previously developed N.NE-S" SW and NW-SE conjugate fault lineaments in eastern Iberia. This rifting episode controlled sedimentation in sectors 1 to 3, allowing volcanic activity at the fault lineaments junction in sector 4, and configuring a palaeogeography of elevated and subsiding blocks, which controlled both continental and marine sedimentation in the study area. 2016 Elsevier B.V. All rights reserved.


英文关键词Carnian Humid Episode CHE CPE Western Tethys Julian Late Triassic Keuper
类型Article
语种英语
国家Spain
收录类别SCI-E
WOS记录号WOS:000393528200008
WOS关键词TRIASSIC CARBONATE PLATFORMS ; SEA-LEVEL CHANGE ; PLUVIAL-EVENT ; SOUTHEASTERN SPAIN ; CLIMATIC-CHANGE ; EASTERN SPAIN ; SOUTHERN ALPS ; MIDDLE ; PALYNOLOGY ; BASIN
WOS类目Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向Physical Geography ; Geology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/199340
作者单位1.UCM, CSIC, Inst Geociencias, C Jose Antonio Novais 2, Madrid 28040, Spain;
2.Univ Complutense Madrid, Dept Estratig, Fac Ciencias Geol, C Jose Antonio Novais 2, E-28040 Madrid, Spain;
3.Univ Zaragoza, Fac Ciencias, Dept Ciencias Tierra, C Pedro Cerbuna 12, E-50009 Zaragoza, Spain
推荐引用方式
GB/T 7714
Lopez-Gomez, J.,Escudero-Mozo, M. J.,Martin-Chivelet, J.,et al. Western Tethys continental-marine responses to the Carnian Humid Episode: Palaeoclimatic and palaeogeographic implications[J],2017,148:79-95.
APA Lopez-Gomez, J.,Escudero-Mozo, M. J.,Martin-Chivelet, J.,Arche, A.,Lago, M.,&Gale, C..(2017).Western Tethys continental-marine responses to the Carnian Humid Episode: Palaeoclimatic and palaeogeographic implications.GLOBAL AND PLANETARY CHANGE,148,79-95.
MLA Lopez-Gomez, J.,et al."Western Tethys continental-marine responses to the Carnian Humid Episode: Palaeoclimatic and palaeogeographic implications".GLOBAL AND PLANETARY CHANGE 148(2017):79-95.
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