Abstract
The paper describes the variation pattern of magnetic susceptibility of Lameta sediments and isotopic variation of organic13C from Chui Hill, Bergi, Kholdoda, Pisdura and Girad. The susceptibility pattern and a negative carbon isotopic anomaly allows fixation of the K/T boundary at these localities and they differ in these aspects from the inter-trappean sediments at Anjar.
Paleomagnetic measurements of the Anjar sediment and the overlying basalt flow demonstrate reversed polarity. The Lameta sediments with dinosaur nests at Kheda and the overlying intertrappean sediments are of normal polarity.
The clay layers at Anjar, associated closely with Ir-enrichments, are strongly leached, rhyolitic bentonites containing low-quartz paramorphs after high-quartz with glass inclusions.
It is concluded, that the inter-trappean lake deposits at Anjar were deposited in the early part of magnetochron 29R and are unrelated to the K/T boundary.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Bajpai S 1999 Fossil records from the rich Deccan intertrappean beds, Anjar: Data and inferences. Abstracts p. 1–2, in “Deccan Trap basalts and the K/T boundary”;Phys. Res. Lab, Ahmedabad, India
Bajpai S and Prasad GVR 2000 Cretaceous age for Ir-rich Deccan intertrappean deposits: palaeontological evidence from Anjar, western India;J. Geol. Soc. London 157 257–260
Best M G 1982Igneous and metamorphic petrology; (Freeman and Co.)
Bhandari N, Shukla P N and Pandey J 1987 Iridium enrichment at Cretaceous-Tertiary boundary in Meghalaya;Curr. Sci. 56 1003–1005
Bhandari N, Gupta M, Pandey J and Shukla P N 1994 Chemical profiles in K/T boundary section of Meghalaya India: Cometary, asteroidal or volcanic;Chem. Geol. 113 45–60
Bhandari N, Shukla P N, Ghevariya Z G and Sundaram S M 1995a Impact did not trigger Deccan volcanism: evidence from Anjar K/T boundary intertrappean sediments;Geophys. Res. Lett. 22, 433–436
Bhandari N, Ghevariya Z G and Bajpaj S 1995b K/T boundary problems: Relevance and importance of Anjar intertrappean section. Report on Group and Field workshopPhys. Res. Lab. Ahmedabad, India.
Bhandari N, Shukla P N, Ghevariya Z G and Sundaram S M 1996 K/T boundary layer in Deccan intertrappeans at Anjar, Kutch. In: The Cretaceous-Tertiary Event and other catastrophes in earth history (eds) G Ryder, D Fastovsky, S Gartner;Geol. Soc. Amer. Spec. Pap.307, 417–424
Bohor B F and Triplehorn D M 1993 Tonsteins; altered volcanic ash-layers in coal-bearing sequences;Geol. Soc. Am. Spec. pap.285, 1–44
Brown G 1980 Associated minerals. In: Crystal structures of clay minerals and their X-ray identification (eds) G. W. Birdley, and G. Brown,Min. Soc. London, 495 p.
Courtillot V, Gallet Y, Rocchia R, Férraud G, Robin E, Hofmann C, Bhandari N, Ghevariya Z G 2000 Cosmic markers,40Ar/39Ar dating and paleomagnetism of the KT sections in the Anjar area of the Deccan large igneous province;Earth Planet. Sci. Lett.,182, 137–156
Dolenec T, Pavsic J and Lojen S 1998 Stable isotopes, Ir anomaly and other elemental markers near Palaeocene-Eocene transition: evidence from the western Tethys;Miner. Mag. 62A 399–400
Hansen H J, Rasmussen K L, Liu Qingsheng, Benjamini C, Walaszczyk I, Gwozdz R and Stage M 1993 Correlation of marine and terrestrial Upper Cretaceous sediments by their magnetic susceptibility;Bull. Geol. Soc. Denmark 40 175–184
Hansen H J, Toft P, Mohabey D M, Sarkar A 1996 Lameta age: Dating the main pulse of the Deccan Traps volcanism;Gondwana Geol. Mag., Spl Vol. 2, 365-374. (Nagpur, India)
Hansen H J, Lojen S, Toft P, Dolenec T, Tong Jinnan, Michaelsen P and Sarkar A 2000 Magnetic susceptibility and organic carbon isotopes of sediments across some marine and terrestrial Permo-Triassic boundaries; In:Permo-Triassic evolution of Tethys, Circum-Pacific and marginal Gondwana (eds) Yin Hongfuet al. (Elsevier).
Huene F B von and Matley C A 1933 The Cretaceous Saurischia and Ornithischia of central Provinces of India;Palaeontologia Indica, N. S.21 1–70
Kalb G and Klotsch H 1941 Die Kristalltracht des Hochquarzes in minerogenetischer Betrachtung;Zentralbl. Mineral., Geol., Paleont, Abt. A, 66–72
Kuslys M and KrÄhenbühl U 1983 Noble metals in Cretaceous/Tertiary sediments from El Kef;Radiochim. Acta 34 139–141
Margolis S V, Swinburne N H M, Alvarez W, McCauley S E, Magde L S, Donovan J, Snyder D, Asaro F, Swisher C C, McWilliams M, Hansen H J and Pedersen A K 1991 Possible impact ejecta in the Paleocene flood basalt province of West Greenland;AGU Fall Meeting, Program and abstracts, P11A–02
Mohabey D M 1984 Study of dinosaurian eggs from intratrappean limestone in Kheda district, Gujarat;J. Geol. Soc. India 25(6), 329–333
Mohabey D M 1998 Systematics of Indian Upper Cretaceous dinosaur and chelonian eggshells;J. Vert. Pal. 18(2), 348–362
Mohabey D M 2000 Indian Upper Cretaceous (Maestrichtian) dinosaur eggs: their parataxonomy and implications in understanding the nesting behaviour;First International Symposium on Dinosaur Eggs and Babies, extended abstracts, p. 139–153. (Spain.)
Mohabey D M and Udhoji S G 1996 Fauna and flora from Late Cretaceous (Maestrichtian) Lameta sediments associated with Deccan Volcanic episode, Maharashtra: its relevance to the KT boundary problem, palaeoenvironment and palaeogeography;Gond. Geol. Mag. Spl Vol.2, 349–360
Rigby J K Jr, Newman K R, Smit J, van der Kaars S, Sloan R E and Rigby J K 1987 Dinosaurs from the Paleocene part of the Hell Creek Formation, McCone County, Montana;Palaios 2, 296–302
Rocchia R, Boclet D, Courtillot V and Jaeger J J 1988 A search for iridium in the Deccan Traps and Inter-traps;Geophys. Res. Lett. 15 8 812–815
Tandon S K, Andrews J E, Sood A and Mittal S 1998 Shrinkage and sediment supply control on multiple calcrete profile development: a case study from the Maastrichtian of central India;Sedimentary Geology,119 25–45
Toutain J.-P and Meyer G 1989 Iridium-bearing sublimates at a hot-spot volcano (Piton de la Fournaise, Indian Ocean);Geophys. Res. Lett. 16 1391–1394
Venkatesan T R, Pande K and Gopalan 199640Ar-39Ar ages of Anjar Traps, western Deccan Province (India) and its relation to the Cretaceous-Tertiary boundary events;Curr. Sci. 70 990–996
Yin Hongfu, Huang Siji, Zhang Kexing, Hansen H J, Yang Fengqing, Ding Meihua and Bie Xianmei 1992 The effects of volcanism on the Permo-Triassic mass extinction in south China p. 146-157. In:Permo-Triassic events in the eastern Tethys (eds) W C Sweet, Zunyi Yang, J. M. Dickins and Yin Hongfu), 181 p., (Cambridge University Press.)
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Hansen, H.J., Mohabey, D.M. & Toft, P. No K/T boundary at Anjar, Gujarat, India: Evidence from magnetic susceptibility and carbon isotopes. J Earth Syst Sci 110, 133–142 (2001). https://doi.org/10.1007/BF02702213
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF02702213