40Ar/39Ar Dating of Detrital Muscovites from Sun-Koshi-Arun River Basin and Effect of Tectonics and Climate in the Eastern Himalayas

Simple item page
dc.contributor.advisorCopeland, Peter
dc.contributor.committeeMemberMurphy, Michael A.
dc.contributor.committeeMemberGasparini, Nicole M.
dc.creatorBaral, Sameer 1984-
dc.creator.orcid0000-0003-2405-0494
dc.date.accessioned2019-09-14T01:18:30Z
dc.date.available2019-09-14T01:18:30Z
dc.date.createdMay 2017
dc.date.issued2017-05
dc.date.submittedMay 2017
dc.date.updated2019-09-14T01:18:31Z
dc.description.abstract40Ar/39Ar ages of detrital muscovites from two adjacent river catchments in eastern Nepal were collected to study the implication of tectonics and climate in the region. The Sun-Koshi and Arun Rivers combine to form one of the largest river systems in Nepal with the combined catchment area of ~51,645 km2. Combining the new data with previously published bedrock ages leads to additional insight on the tectonic effect of landscape evolution in the eastern Himalayas. Muscovite cooling age of both samples from Arun and Sun-Koshi rivers are similar with a mean age of 11.6 Ma. The majority of ages are less than 14 Ma in both catchments. The lack of correspondence of rainfall with bedrock and detrital ages, channel-steepness index, and topography suggests that tectonics is the primary driver of erosion in the eastern Himalayas. The ages of muscovites from both catchments suggest erosional history, which increased in magnitude since 10 Ma due to the initiation of midcrustal duplex system, out-of-sequence thrusting, or the activation of trans-Himalayan normal fault from South Tibetan Detachment system. The detrital ages in Sun-Koshi-Arun catchments, when compared with the bedrock ages (low- and high-temperature thermochronology) show similar ages with central Nepal. The detrital data from both eastern and central Nepal are similar and the ages of late Miocene suggest that a similar average exhumation rates have operated in these regions since about 11 Ma.
dc.description.departmentEarth and Atmospheric Sciences, Department of
dc.format.digitalOriginborn digital
dc.format.mimetypeapplication/pdf
dc.identifier.urihttps://hdl.handle.net/10657/4572
dc.language.isoeng
dc.rightsThe author of this work is the copyright owner. UH Libraries and the Texas Digital Library have their permission to store and provide access to this work. Further transmission, reproduction, or presentation of this work is prohibited except with permission of the author(s).
dc.subjectGeology
dc.subjectGeomorphology
dc.subjectThermochronology
dc.subjectGeochronology
dc.subjectDetrital thermochronology
dc.subjectHimalayas
dc.subjectNepal
dc.subjectArun River
dc.subjectArun River Valley
dc.subjectSun-Koshi River
dc.subjectTectonic geomorphology
dc.title40Ar/39Ar Dating of Detrital Muscovites from Sun-Koshi-Arun River Basin and Effect of Tectonics and Climate in the Eastern Himalayas
dc.type.dcmiText
dc.type.genreThesis
thesis.degree.collegeCollege of Natural Sciences and Mathematics
thesis.degree.departmentEarth and Atmospheric Sciences, Department of
thesis.degree.disciplineGeology
thesis.degree.grantorUniversity of Houston
thesis.degree.levelMasters
thesis.degree.nameMaster of Science

Files

Original bundle

Now showing 1 - 1 of 1
Thumbnail Image
Name:
BARAL-THESIS-2017.pdf
Size:
4.1 MB
Format:
Adobe Portable Document Format
Download

License bundle

Now showing 1 - 1 of 1
No Thumbnail Available
Name:
LICENSE.txt
Size:
1.81 KB
Format:
Plain Text
Description:
Download

Collections

Published ETD Collection