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It is really a debate! On a different note, while erosional control on out-of-sequence thrusting in the Greater Himalaya has been proposed, our analogue models doubt this link. Soumyajit Mukherjee http://www.geos.iitb.ac.in/index.php/sm On Mon, Nov 10, 2014 at 7:49 PM, Peter D Clift <[log in to unmask]> wrote: > It should also perhaps be kept in mind that without the erosion along > the Himalayan front that the amount of exhumation we have observed in those > mountains would be relatively small. I don't think many people would agree > that all of the Greater Himalayan exhumation is caused by the South Tibet > Detachment and that effectively that this mountain belt is an extensional > feature. In any case I'm not entirely convinced that the South Tibet > detachment is not climatically modulated anyway. In my opinion that has > still yet to be demonstrated. there seem to be good reasons to believe that > the Main Central Thrust is climatically controlled so why not South Tibet > detachment? > > Peter Clift > > > On Nov 9, 2014, at 10:14 AM, gapais <[log in to unmask]> wrote: > > Some of you should probably keep in mind that the Himalayas is a belt of > about 2500 long and that a comparable zonation of exhumed rocks (UHP, > Higher Himalayla Crystallinne, and others, crop out all along the belts, > despite drastic variations in climate! It rains a lot in central Himalayas > as in Nepal during the Monsoon, but the western Ladakh area is a desert! > Nepal, althought one of the most visited section, is not representative of > the belt in terms of climate, despite outcroping rocks and tectonic > features are quite representative of the Himalayan belt. The only common > structure all along the belt, that accounts for the exhumation of deep > rocks, is the Zanskar and south Tibet detachment, a major tectonic-induced > lithospheric structure that has nothing to do with climate. Keep also in > mind that the NS-striking Andes cut across nearlly all possible climate > environments, and show rather comparable deformation and structural > patterns from South Peru down to Patagonia and Tierra de Fuego. > > Best regards > Denis > > Le 9 nov. 2014 à 06:12, Michael <[log in to unmask]> a écrit : > > Dear colleagues, > > > We would like to draw your attention to the following EGU General Assembly > session (TS3.3/CL1.9/GM3.6) to take place between 12th April - 17th April > 2015 in Vienna, Austria entitled: "Investigating Tectonism-Erosion-Climate > Couplings (iTECC): Himalayan orogenic development and climatic feedbacks > from micro- to macro-scale" > > > > Conveners: Guangsheng Zhuang, Michael Kelly, Alessandro Santato, Yani > Najman, Jan Wijbrans > > > This session aims to bring together innovative studies from young and > experienced scientists studying the past, present and future implications > of the Himalaya-Tibet orogeny from a variety of temporal and special > approaches. > > Session Description: > A close relationship between tectonics, erosion and climate has been well > established over numerous years of research in varying dynamic geological > settings and has inspired many rewarding conversations among earth > scientists across various fields of research. The Himalaya-Tibet orogen, > not only because of its height, extent and rate of uplift, serves as an > important natural laboratory for investigating couplings between > topographic evolution and climate forces in active mountain belts which are > related through surficial processes. > > The newly launched Marie Curie Actions Group 'iTECC' (Investigating > Tectonism-erosion-climate-couplings) program will serve as an excellent > podium to inspire discussion and further our understanding of this dynamic > geological setting from a wide range of earth science disciplines. > > This session aims to bring together innovative studies from young and > experienced scientists studying the past, present and future implications > of the Himalaya-Tibet orogeny. Himalayan studies from a variety of temporal > and special approaches will be presented, ranging from numerical models > coupling tectonics, climate and erosion; to quantifying the controls on > chemical weathering and physical erosion within the Himalaya by > understanding the feedback loops with global atmospheric CO2 levels. > Innovative studies utilising compound-level isotopic studies, near- and > far-field sedimentary basin records and detrital geochemistry to infer > proximal and distal India-Asia collisional tectonics, hinterland exhumation > histories of basement rocks and Himalayan evolution are presented. This > session will also present studies focusing on Himalayan weathering, erosion > and climate through time, as well as, the development and refinement of > analytical techniques needed to better interpret the past and present-day > records of exhumation, erosion and climate processes within this dynamic > orogenic belt. > > > > We welcome oral and poster presentations to this session. Please submit an > abstract by following the link: > http://meetingorganizer.copernicus.org/EGU2015/session/17980 > > Abstract deadline is 07 January 2015. > > A limited amount of financial support is available through the EGU for > students and early career researchers. If you intend to apply for financial > support, please submit your abstract by 28th November 2014. More > information on financial support can be found at the following webpage > http://www.egu2015.eu/support_and_distinction.html > > Please feel free to contact us for any further information (contact > details given below). Thank you for your attention. > > With best wishes, > > Michael Kelly (on behalf of the session organisers) > > Guangsheng Zhuang, Lancaster University, UK ([log in to unmask]) > Michael Kelly, Cairn India Limited, India ([log in to unmask]) > Alessandro Santato, Thermofisher, Germany ( > [log in to unmask]) > Yani Najman, University of Lancaster, UK ([log in to unmask]) > Jan Wijbrans, VU University, Amsterdam ([log in to unmask]) > > > Denis Gapais > Géosciences Rennes > UMR 6118 CNRS > Université de Rennes 1 > 35042 Rennes cedex > France > phone 33 2 23 23 67 36 > mobile 33 6 20 01 58 69 > fax 33 2 23 23 60 97 > > > > > ====================== > > Peter D. Clift > Charles T. McCord Chair in Petroleum Geology, > Department of Geology and Geophysics, > E235 Howe-Russell-Kniffen Geoscience Complex > Louisiana State University, > Baton Rouge, LA 70803, > USA > > Tel: +1 225-578-2153 > Fax: +1 225-578-2302 > Email: [log in to unmask] > > http://www.geol.lsu.edu/pclift/pclift/Home.html > > Attend AGU Chapman meeting "Evolution of the Asian monsoon and its impact > on landscape, environment and society", June 15-19th 2015, Hong Kong > > http://www.geol.lsu.edu/pclift/Monsoon_AGU_Chapman_Meeting/Welcome.html > > -- Best, Dr. Soumyajit Mukherjee ---------------------------------------------------- Our ongoing GSL Sp Vol: http://sp.lyellcollection.org/online-first/412 Assistant Professor Geodynamics Lab (Room Number: 101, 1st Floor) Department of Earth Sciences Indian Institute of Technology Bombay Powai, Mumbai- 400 076, Maharashtra, INDIA Landline: +91-022-2576-7281 (Office) Fax: +91-022-2576-7253 Alternate mail id: [log in to unmask] URL: http://www.geos.iitb.ac.in/index.php/sm ----------------------------------------------------