Organic carbon burial forcing of the carbon cycle from Himalayan erosion

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doi: 10.1038/36324
Author(s): France-Lanord, Christian; Derry, Louis A.
Author Affiliation(s): Primary:
CNRS, Centre de Recherches Pétrographiques et Géochimiques, Vandoeuvre-les-Nancy, France
Cornell University, United States
Volume Title: Nature (London)
Source: Nature (London), 390(6655), p.65-67. Publisher: Macmillan Journals, London, United Kingdom. ISSN: 0028-0836 CODEN: NATUAS
Note: In English. 32 refs.; illus., incl. 1 table
Summary: Analyses are presented of average chemical compositions of the High Himalayan Crystalline (HHC) and of decarbonated Neogene sediments from ODP Leg 116 samples from the Bay of Bengal. The chemistry of the last-named is used to estimate the sinks of CO2 from silicate weathering and burial resulting from the Himalayan uplift. Neogene CO2 consumption from the net burial of organic C during Himalayan sediment deposition was two to three times that resulting from the weathering of Himalayan silicates. The source of the Bengal fan sediments is represented by a composite of 99 samples from outcrops of the HHC in central Nepal. Total orgnaic C in these metamorphic rocks averages 0.05 ± 0.030/00 Corg. The sediments from the Bengal Bay fan were chosen to represent a range of weathering intensities based on their clay mineralogy. The main effect of Neogene Himalayan erosion on the carbon cycle was an increase in the amount of organic C in the sedimentary reservoir and not an increase in silicate weathering fluxes.
Year of Publication: 1997
Research Program: ODP Ocean Drilling Program
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Asia; Bengal Fan; Burial; Carbon; Carbon dioxide; Cenozoic; Erosion; Geochemical cycle; Himalayas; Indian Ocean; Leg 116; Neogene; Ocean Drilling Program; Organic carbon; Paleoclimatology; Paleotemperature; Sediments; Silicates; Sinks; Tertiary; Weathering
Coordinates: S010116 S005547 E0812404 E0812324
Record ID: 1998001581
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United Kingdom, Twickenham, United Kingdom