Control of detachment geometry on lateral variations in exhumation rates in the Himalaya: Insights from low-temperature thermochronology and numerical modeling
The Himalayan range is commonly presented as largely laterally uniform from west to east. However, geological structures, topography, precipitation rate, convergence rates, and low‐temperature thermochronological ages all vary significantly along strike. Here, we focus on the interpretation of therm...
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| Veröffentlicht in: | Journal of Geophysical Research 2011-05, Vol.116 (B5), p.n/a, Article B05202 |
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| creator | Robert, Xavier van der Beek, Peter Braun, Jean Perry, Claire Mugnier, Jean-Louis |
| description | The Himalayan range is commonly presented as largely laterally uniform from west to east. However, geological structures, topography, precipitation rate, convergence rates, and low‐temperature thermochronological ages all vary significantly along strike. Here, we focus on the interpretation of thermochronological data sets in terms of along‐strike variations in geometry and kinematics of the main crustal detachment underlying the Himalaya: the Main Himalayan Thrust (MHT). We report new apatite fission track (AFT) ages collected along north‐south transects in western and eastern central Nepal (at the latitudes of the Annapurna and Langtang massifs, respectively). AFT ages are consistently young ( |
| doi_str_mv | 10.1029/2010JB007893 |
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Key Points
We report new apatite fission track ages collected in central Nepal
We perform forward and inverse thermal kinematic modeling with PECUBE
Lateral variations in the geometry of the MHT control kinematics and exhumation</description><identifier>ISSN: 0148-0227</identifier><identifier>ISSN: 2169-9313</identifier><identifier>EISSN: 2156-2202</identifier><identifier>EISSN: 2169-9356</identifier><identifier>DOI: 10.1029/2010JB007893</identifier><language>eng</language><publisher>Blackwell Publishing Ltd</publisher><subject>Earth Sciences ; Himalaya ; main Himalayan thrust ; numerical modeling ; reactivation ; Sciences of the Universe ; Tectonics ; thermochronology</subject><ispartof>Journal of Geophysical Research, 2011-05, Vol.116 (B5), p.n/a, Article B05202</ispartof><rights>Copyright 2011 by the American Geophysical Union.</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4124-285f7c724b054382c7e6831a3e17643f33f1eeb80faff6231fbcb016ed68b1583</citedby><cites>FETCH-LOGICAL-a4124-285f7c724b054382c7e6831a3e17643f33f1eeb80faff6231fbcb016ed68b1583</cites><orcidid>0000-0001-9581-3159 ; 0000-0002-0567-7497</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1029%2F2010JB007893$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1029%2F2010JB007893$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>230,314,780,784,885,1416,1432,11513,27923,27924,45573,45574,46408,46467,46832,46891</link.rule.ids><backlink>$$Uhttps://hal.science/hal-03135760$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Robert, Xavier</creatorcontrib><creatorcontrib>van der Beek, Peter</creatorcontrib><creatorcontrib>Braun, Jean</creatorcontrib><creatorcontrib>Perry, Claire</creatorcontrib><creatorcontrib>Mugnier, Jean-Louis</creatorcontrib><title>Control of detachment geometry on lateral variations in exhumation rates in the Himalaya: Insights from low-temperature thermochronology and numerical modeling</title><title>Journal of Geophysical Research</title><addtitle>J. Geophys. Res</addtitle><description>The Himalayan range is commonly presented as largely laterally uniform from west to east. However, geological structures, topography, precipitation rate, convergence rates, and low‐temperature thermochronological ages all vary significantly along strike. Here, we focus on the interpretation of thermochronological data sets in terms of along‐strike variations in geometry and kinematics of the main crustal detachment underlying the Himalaya: the Main Himalayan Thrust (MHT). We report new apatite fission track (AFT) ages collected along north‐south transects in western and eastern central Nepal (at the latitudes of the Annapurna and Langtang massifs, respectively). AFT ages are consistently young (<3 Ma) along both N‐S transects in the high‐relief zone of the Higher Himalaya and increase (4 to 6 Ma) toward the south in the Lesser Himalaya. We compare our new data to published low‐temperature thermochronological data sets for Nepal and the Bhutan Himalaya. We use the full data set to perform both forward and inverse thermal kinematic modeling with a modified version of the Pecube code in order to constrain potential along‐strike variations in the kinematics of the Himalayan range. Our results show that lateral variations in the geometry of the MHT (in particular the presence or absence of a major crustal‐scale ramp) strongly control the kinematics and exhumation history of the orogen.
Key Points
We report new apatite fission track ages collected in central Nepal
We perform forward and inverse thermal kinematic modeling with PECUBE
Lateral variations in the geometry of the MHT control kinematics and exhumation</description><subject>Earth Sciences</subject><subject>Himalaya</subject><subject>main Himalayan thrust</subject><subject>numerical modeling</subject><subject>reactivation</subject><subject>Sciences of the Universe</subject><subject>Tectonics</subject><subject>thermochronology</subject><issn>0148-0227</issn><issn>2169-9313</issn><issn>2156-2202</issn><issn>2169-9356</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNp9kcFuEzEQhlcIJKLSGw_gKxILHttrb7m1EUlaIpAQiKPl3YyzBq9d2U7bfRpelU2DKk7MZTS_vn9Go7-qXgN9B5RdvGcU6M0Vpaq94M-qBYNG1oxR9rxaUBBtTRlTL6vznH_SuUQjBYVF9XsZQ0nRk2jJDovphxFDIXuMI5Y0kRiINwWT8eTOJGeKiyETFwg-DIfxcSRpBh61MiDZuNF4M5kP5Dpktx9KJjbFkfh4Xxccb-dV5ZDwyKYx9kOKIfq4n4gJOxIOIybXz8fGuEPvwv5V9cIan_H8bz-rvq8-fltu6u2X9fXyclsbAUzUrG2s6hUTHW0Eb1mvULYcDEdQUnDLuQXErqXWWCsZB9v1HQWJO9l20LT8rHpz2jsYr2_T_ESadDROby63-qhRDrxRkt7BzL49sX2KOSe0Twag-piF_jeLGecn_N55nP7L6pv11yuQCsTsqk8ulws-PLlM-qWl4qrRPz6v9RbUaiXUJ835H0F4nIA</recordid><startdate>201105</startdate><enddate>201105</enddate><creator>Robert, Xavier</creator><creator>van der Beek, Peter</creator><creator>Braun, Jean</creator><creator>Perry, Claire</creator><creator>Mugnier, Jean-Louis</creator><general>Blackwell Publishing Ltd</general><general>American Geophysical Union</general><scope>BSCLL</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>1XC</scope><scope>VOOES</scope><orcidid>https://orcid.org/0000-0001-9581-3159</orcidid><orcidid>https://orcid.org/0000-0002-0567-7497</orcidid></search><sort><creationdate>201105</creationdate><title>Control of detachment geometry on lateral variations in exhumation rates in the Himalaya: Insights from low-temperature thermochronology and numerical modeling</title><author>Robert, Xavier ; van der Beek, Peter ; Braun, Jean ; Perry, Claire ; Mugnier, Jean-Louis</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4124-285f7c724b054382c7e6831a3e17643f33f1eeb80faff6231fbcb016ed68b1583</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Earth Sciences</topic><topic>Himalaya</topic><topic>main Himalayan thrust</topic><topic>numerical modeling</topic><topic>reactivation</topic><topic>Sciences of the Universe</topic><topic>Tectonics</topic><topic>thermochronology</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Robert, Xavier</creatorcontrib><creatorcontrib>van der Beek, Peter</creatorcontrib><creatorcontrib>Braun, Jean</creatorcontrib><creatorcontrib>Perry, Claire</creatorcontrib><creatorcontrib>Mugnier, Jean-Louis</creatorcontrib><collection>Istex</collection><collection>CrossRef</collection><collection>Hyper Article en Ligne (HAL)</collection><collection>Hyper Article en Ligne (HAL) (Open Access)</collection><jtitle>Journal of Geophysical Research</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Robert, Xavier</au><au>van der Beek, Peter</au><au>Braun, Jean</au><au>Perry, Claire</au><au>Mugnier, Jean-Louis</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Control of detachment geometry on lateral variations in exhumation rates in the Himalaya: Insights from low-temperature thermochronology and numerical modeling</atitle><jtitle>Journal of Geophysical Research</jtitle><addtitle>J. Geophys. Res</addtitle><date>2011-05</date><risdate>2011</risdate><volume>116</volume><issue>B5</issue><epage>n/a</epage><artnum>B05202</artnum><issn>0148-0227</issn><issn>2169-9313</issn><eissn>2156-2202</eissn><eissn>2169-9356</eissn><abstract>The Himalayan range is commonly presented as largely laterally uniform from west to east. However, geological structures, topography, precipitation rate, convergence rates, and low‐temperature thermochronological ages all vary significantly along strike. Here, we focus on the interpretation of thermochronological data sets in terms of along‐strike variations in geometry and kinematics of the main crustal detachment underlying the Himalaya: the Main Himalayan Thrust (MHT). We report new apatite fission track (AFT) ages collected along north‐south transects in western and eastern central Nepal (at the latitudes of the Annapurna and Langtang massifs, respectively). AFT ages are consistently young (<3 Ma) along both N‐S transects in the high‐relief zone of the Higher Himalaya and increase (4 to 6 Ma) toward the south in the Lesser Himalaya. We compare our new data to published low‐temperature thermochronological data sets for Nepal and the Bhutan Himalaya. We use the full data set to perform both forward and inverse thermal kinematic modeling with a modified version of the Pecube code in order to constrain potential along‐strike variations in the kinematics of the Himalayan range. Our results show that lateral variations in the geometry of the MHT (in particular the presence or absence of a major crustal‐scale ramp) strongly control the kinematics and exhumation history of the orogen.
Key Points
We report new apatite fission track ages collected in central Nepal
We perform forward and inverse thermal kinematic modeling with PECUBE
Lateral variations in the geometry of the MHT control kinematics and exhumation</abstract><pub>Blackwell Publishing Ltd</pub><doi>10.1029/2010JB007893</doi><tpages>22</tpages><orcidid>https://orcid.org/0000-0001-9581-3159</orcidid><orcidid>https://orcid.org/0000-0002-0567-7497</orcidid><oa>free_for_read</oa></addata></record> |
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| source | Wiley Free Content; Wiley-Blackwell AGU Digital Library; Wiley Online Library All Journals; Alma/SFX Local Collection |
| subjects | Earth Sciences Himalaya main Himalayan thrust numerical modeling reactivation Sciences of the Universe Tectonics thermochronology |
| title | Control of detachment geometry on lateral variations in exhumation rates in the Himalaya: Insights from low-temperature thermochronology and numerical modeling |
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