Identification info

Metadata Language

English (en)

Dataset Reference Date ()

2016-06

Identifier

http://data.bgs.ac.uk/id/dataHolding/13607029

Maintenance and update frequency

notApplicable

GEMET - INSPIRE themes

• Geology

BGS Thesaurus of Geosciences

• Holocene

• Quaternary

• Palaeoecology

• Climatology

Keywords

• NERC_DDC

Limitations on Public Access

otherRestrictions

Other constraints

licenceOGL

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Use constraints

otherRestrictions

Other constraints

The copyright of materials derived from the British Geological Survey's work is vested in the Natural Environment Research Council [NERC]. No part of this work may be reproduced or transmitted in any form or by any means, or stored in a retrieval system of any nature, without the prior permission of the copyright holder, via the BGS Intellectual Property Rights Manager. Use by customers of information provided by the BGS, is at the customer's own risk. In view of the disparate sources of information at BGS's disposal, including such material donated to BGS, that BGS accepts in good faith as being accurate, the Natural Environment Research Council (NERC) gives no warranty, expressed or implied, as to the quality or accuracy of the information supplied, or to the information's suitability for any use. NERC/BGS accepts no liability whatever in respect of loss, damage, injury or other occurence however caused.

Other constraints

Available under the Open Government Licence subject to the following acknowledgement accompanying the reproduced NERC materials "Contains NERC materials ©NERC [year]"

Topic category

• Geoscientific information

Extent

ANDES [id=842000]

Dataset Reference Date ()

1979

Extent

BO

Dataset Reference Date ()

2009

Extent

BOL

Dataset Reference Date ()

2009

Extent

BOLIVIA [id=867000]

Dataset Reference Date ()

1979

Extent

EC

Dataset Reference Date ()

2009

Extent

ECU

Dataset Reference Date ()

2009

Extent

ECUADOR [id=863000]

Dataset Reference Date ()

1979

Extent

PE

Dataset Reference Date ()

2009

Extent

PER

Dataset Reference Date ()

2009

Extent

PERU [id=864000]

Dataset Reference Date ()

1979

End date

2015-10

Additional information

NERC grant NE/J018562/1. This grant is linked to NERC studentship grant NE/J500288/1, see metadata entry 13606924.

 

Distribution Information

Data format

 

Quality Scope

dataset

Other

dataset

Statement

Collection of the sedimentary archives (field work to Ecuador). The recovery of the sediments was performed from a wooded platform on the lakes supported in inflatable boats using a Livingstone corer. - Storage in a cold room based at the Open University (UK) until splitting the cores. - Subsampling the cores using a syringe of 1cc volume. LAB TREATMENT FOR PALYNOLOGICAL ANALYSES (proxies analysed: pollen ,non-pollen palynomorphs, and microcharcoal) - Acid digestion using hot: KOH at 10%, Na4P2O7 at 2.66%, HCl at 10%, HF at 40%, and acetolisis mixture (mix of (CH3CO)2O at 97% and H2SO4 at 95-98% in a proportion of 9:1). Palynological residues obtained from the treatment were mounted in glycerine. LAB TREATMENT FOR CHIRONOMIDS ANALYSIS - Disaggregation of the sediment using hot KOH at 10% - Dehydration of the chironomids head capsules by sequential imbibition using: ethanol (80%), ethanol (100%), and euparal essence. Final mounting in slides using euparal. LAB TREATMENT FOR STABLE ISOTOPES ANALYSIS - Drying of samples at 40ºC - Crushing of the dried sediments to a fine powder - Decalcification: add 0.1M and 1.0M of HCl; dry samples overnight at 40ºC, and transfer the samples to Sn capsules for the analysis LAB TREATMENT FOR XRF ANALYSIS - Drying of samples overnight at 110 °C - Crushing of the dried sediments to a fine powder - Loss-on-ignition was performed on 1.2 g of the powdered sub-sample; the sub-sample was ignited for one hour in a furnace set at 1000 °C - Glass discs were then created using 0.7000 g of the remaining powdered sub-sample and 3.6300 g of lithium metaborate flux - The powder/flux mix was then placed into a muffle furnace at 1100 °C for 20 minutes in order to melt the mixture - When homogenised, the melt was poured into a heated brass mould and a plunger was pressed down steadily, forming the glass disc - The samples (in glass discs) were analysed on an ARL 8420+ dual goniometer wavelength dispersive XRF spectrometer.

Metadata

File identifier

4064b9bb-e765-38d9-e054-002128a47908 XML

Metadata Language

English (en)

Resource type

dataset

Metadata Date

2023-03-14

Metadata standard name

UK GEMINI

Metadata standard version

2.3