干旱区生态环境知识资源中心(Arid): A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data

Arid

DOI	10.1016/j.earscirev.2020.103092
	A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data
	Charbonnier, Guillaume 1,2; Duchamp-Alphonse, Stephanie 2; Deconinck, Jean-Francois 3; Adatte, Thierry 1; Spangenberg, Jorge E.4; Colin, Christophe 2; Follmi, Karl B.1
通讯作者	Charbonnier, Guillaume
来源期刊	EARTH-SCIENCE REVIEWS
ISSN	0012-8252
EISSN	1872-6828
出版年	2020
卷号	202
英文摘要	High-resolution clay mineral and delta O-18(carb) analyses have been performed on three sections of Valanginian age (Early Cretaceous), from northwestern (similar to 20-30 degrees N) and southern (similar to 53 degrees S) Tethyan realms. The data have been integrated in a large set of published mineralogical (clays), and geochemical (delta O-18(carb), delta O-18(bivalve), delta O-18(lenticulina), delta O-18(belemnite), and TEX86) data from 17 sections, situated between similar to 45 degrees N and similar to 53 degrees S. Based on this data set, we provide new insights into Valanginian climate conditions from a wide range of palaeolatitudes. We highlight climate trends within specific areas and identify main climate belts. In the Proto-North Atlantic realm (similar to 15-17 degrees N) large amounts of smectite together with the occurrence of palygorskite testify for a semi-arid climate belt throughout the Valanginian. Significant variations in kaolinite content in the northwestern Tethyan realm (similar to 20 to 30 degrees N) suggest that this realm has been more sensitive to changes in hydrological cycling and subsequent erosion and runoff processes during the early to early-late Valanginian transition interval. This time interval, that is coincident with the pronounced positive and globally recognized carbon isotope excursion (CIE; the Weissert episode), documents the wet conditions of a humid subtropical climate belt. Temperature ranges derived from delta O-18 records suggest climate warming by about 3-5 +/- 0.9 degrees C in the northern hemisphere, during the Weissert episode. This is followed by a global cooling of about ca. 1-5 +/- 0.9 degrees C in both hemispheres, during the late Valanginian. We postulate that these patterns were due to interplays between tectonic and orbital factors, which have controlled the distribution of regional palaeoclimate belts during the Valanginian. The semi-arid belt expressed in the Proto North Atlantic realm has probably been induced by its specific palaeogeographic configuration and the existence of isolated basins, which were each characterized by strong and continuous thermohaline circulation. An eccentricity paced monsoon-like system might have played a significant role in maintaining the subtropical belt around the northwestern Tethyan realm, up to the mid latitudes (similar to 35-45 degrees N). Superimposed on these regional processes, a widespread magmatic pulse in Parana-Etendeka volcanic activity might have stimulated greenhouse conditions, impacting marine biota and favouring the development of a dense vegetation cover on the continent. An increase in sedimentary burial of C-13 depleted organic carbon on the continents may have contributed to the progressive global positive carbon isotope excursion. In the medium term, it has also probably led to a significant decrease in atmospheric CO2, as testified by the global cooling recorded during the late Valanginian in both hemispheres and the probable concomitant extension of polar ice caps.
英文关键词	Hydrolysing conditions Temperature range Palaeoclimate belt Volcanic activity Global reconstruction Valanginian
类型	Review
语种	英语
国家	Switzerland ; France
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000526786000001
WOS关键词	CARBON-ISOTOPE STRATIGRAPHY ; SEA-SURFACE TEMPERATURES ; EARLY CRETACEOUS CARBON ; VOCONTIAN BASIN ; PALEOENVIRONMENTAL CHANGES ; DIFFERENTIAL DIAGENESIS ; CALCAREOUS NANNOFOSSIL ; WEISSERT EPISODE ; CLIMATE-CHANGE ; POLAR ICE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314331
作者单位	1.Univ Lausanne, Inst Earth Sci, CH-1015 Lausanne, Switzerland; 2.Univ Paris Sud XI, CNRS, UMR 8148, GEOPS, Batiment 504, F-91405 Orsay, France; 3.Univ Bourgogne Franche Comte, CNRS, UMR 6282 Biogeosci, 6 Bd Gabriel, F-21000 Dijon, France; 4.Univ Lausanne, Inst Earth Surface Dynam, CH-1015 Lausanne, Switzerland
推荐引用方式 GB/T 7714	Charbonnier, Guillaume,Duchamp-Alphonse, Stephanie,Deconinck, Jean-Francois,et al. A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data[J],2020,202.
APA	Charbonnier, Guillaume.,Duchamp-Alphonse, Stephanie.,Deconinck, Jean-Francois.,Adatte, Thierry.,Spangenberg, Jorge E..,...&Follmi, Karl B..(2020).A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data.EARTH-SCIENCE REVIEWS,202.
MLA	Charbonnier, Guillaume,et al."A global palaeoclimatic reconstruction for the Valanginian based on clay mineralogical and geochemical data".EARTH-SCIENCE REVIEWS 202(2020).