TY  - JOUR
A1  - Anoop, Ambili
A1  - Prasad, S.
A1  - Plessen, Birgit
A1  - Basavaiah, Nathani
A1  - Gaye, B.
A1  - Naumann, R.
A1  - Menzel, P.
A1  - Weise, S.
A1  - Brauer, Achim
T1  - Palaeoenvironmental implications of evaporative gaylussite crystals from Lonar Lake, central India
JF  - Journal of quaternary science
N2  - We have undertaken petrographic, mineralogical, geochemical and isotopic investigations on carbonate minerals found within a 10-m-long core from Lonar Lake, central India, with the aim of evaluating their potential as palaeoenvironmental proxies. The core encompasses the entire Holocene and is the first well-dated high-resolution record from central India. While calcite and/or aragonite were found throughout the core, the mineral gaylussite was found only in two specific intervals (46303890 and 2040560 cal a BP). Hydrochemical and isotope data from inflowing streams and lake waters indicate that evaporitic processes play a dominant role in the precipitation of carbonates within this lake. Isotopic (18O and 13C) studies on the evaporative gaylussite crystals and residual bulk carbonates (calcite) from the long core show that evaporation is the major control on 18O enrichment in both the minerals. However, in case of 13C additional mechanisms, for example methanogenesis (gaylussite) and phytoplankton productivity (calcium carbonate), play an additional important role in some intervals. We also discuss the relevance of our investigation for palaeoclimate reconstruction and late Holocene monsoon variability.
KW  - evaporites
KW  - gaylussite
KW  - isotopes
KW  - Lonar Lake
KW  - monsoon
Y1  - 2013
U6  - https://doi.org/10.1002/jqs.2625
SN  - 0267-8179
VL  - 28
IS  - 4
SP  - 349
EP  - 359
PB  - Wiley-Blackwell
CY  - Hoboken
ER  - 
TY  - JOUR
A1  - Riedel, Nils
A1  - Stebich, Martina
A1  - Anoop, Ambili
A1  - Basavaiah, Nathani
A1  - Menzel, Philip
A1  - Prasad, Sushma
A1  - Sachse, Dirk
A1  - Sarkar, Saswati
A1  - Wiesner, Martin
T1  - Modern pollen vegetation relationships in a dry deciduous monsoon forest: A case study from Lonar Crater Lake, central India
JF  - Quaternary international : the journal of the International Union for Quaternary Research
N2  - As part of ongoing research on Holocene lacustrine sediments of Lonar Crater Lake (central India), pollen assemblages in lake surface sediment and soil samples were studied to unravel pollenevegetation relationships, including pollen transport processes in tropical dry deciduous forest vegetation. Furthermore, palynological results were compared with geochemical proxies and spatial features of the lake sediments and the vegetation. The obtained data reveal strong differences in pollen assemblages and pollen concentrations between and within the studied trapping media. Local arboreal vegetation is adequately represented in the soil samples, but is less represented in the lake surface sediment samples. The composition of the lacustrine pollen assemblages is mainly influenced by patterns of transport through surface and channel runoff. Besides the relevance of our new data for reliable interpretation of fossil pollen spectra extracted from Lonar sediment cores, the results of this study are of general importance for the understanding of Quaternary pollen assemblages from tropical lacustrine archives, as well as for the implementation and selection of suitable approaches for quantitative pollen based environmental reconstructions in south Asia and beyond. (C) 2015 Elsevier Ltd and INQUA. All rights reserved.
KW  - Tropical dry deciduous forests
KW  - Modern pollen/vegetation relationships
KW  - Lonar Lake
KW  - Central India
Y1  - 2015
U6  - https://doi.org/10.1016/j.quaint.2015.01.046
SN  - 1040-6182
SN  - 1873-4553
VL  - 371
SP  - 268
EP  - 279
PB  - Elsevier
CY  - Oxford
ER  -