Magma migration, folding, and disaggregation of migmatites in the Karakoram Shear Zone, Ladakh, NW India
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Research Article| July 01, 2008 Magma migration, folding, and disaggregation of migmatites in the Karakoram Shear Zone, Ladakh, NW India Roberto F. Weinberg; Roberto F. Weinberg † 1School of Geosciences, Monash University, Clayton, Vic 3800, Australia †E-mail: roberto.weinberg@sci.monash.edu.au Search for other works by this author on: GSW Google Scholar Geordie Mark Geordie Mark 1School of Geosciences, Monash University, Clayton, Vic 3800, Australia *Present address: Haywood Securities Inc., 2000, 400 Burrard St., Vancouver, British Columbia V6C 3A6, Canada Search for other works by this author on: GSW Google Scholar Author and Article Information Roberto F. Weinberg † 1School of Geosciences, Monash University, Clayton, Vic 3800, Australia Geordie Mark *Present address: Haywood Securities Inc., 2000, 400 Burrard St., Vancouver, British Columbia V6C 3A6, Canada 1School of Geosciences, Monash University, Clayton, Vic 3800, Australia †E-mail: roberto.weinberg@sci.monash.edu.au Publisher: Geological Society of America Received: 15 Mar 2007 Revision Received: 20 Aug 2007 Accepted: 09 Oct 2007 First Online: 02 Mar 2017 Online ISSN: 1943-2674 Print ISSN: 0016-7606 © 2008 Geological Society of America GSA Bulletin (2008) 120 (7-8): 994–1009. https://doi.org/10.1130/B26227.1 Article history Received: 15 Mar 2007 Revision Received: 20 Aug 2007 Accepted: 09 Oct 2007 First Online: 02 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn Email Permissions Search Site Citation Roberto F. Weinberg, Geordie Mark; Magma migration, folding, and disaggregation of migmatites in the Karakoram Shear Zone, Ladakh, NW India. GSA Bulletin 2008;; 120 (7-8): 994–1009. doi: https://doi.org/10.1130/B26227.1 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGSA Bulletin Search Advanced Search Abstract Efficient extraction of granitic magma from crustal sources requires the development of an extensive permeable network of melt-bearing channels during deformation. We investigate rocks that have undergone deformation and melting within the Karakoram Shear Zone of Ladakh, NW India, in which leucosome distribution is inferred to record the permeable network for magma extraction. Delicate structures preserved in these rocks record the development of this permeable magma network and its subsequent destruction to form a mobile mass of melt and solids, resulting from the interplay between folding and magma migration. During folding, magma migrated from rock pores into layer-parallel and axial-planar sheets, forming a stromatic migmatite or metatexite with two communicating sets of sheets, intersecting parallel to the fold axis. Once the network was developed, folding and stretching was eased by magma migration and slip along axial planar magma sheets. Folding and magma migration led to layer disaggregation, transposition, and the formation of a diatexite where rock coherency and banding were destroyed. A number of structures developed during this process such as cuspate fold hinges, disharmonic folds, truncated layering, shear along axial planar leucosomes, and flow drag and disruption of melanosomes. In this system, magma migration was an integral part of deformation and assisted the folding and stretching of metatexites, while folding gave rise to a magma sheet network, now preserved as leucosomes, as well as the pressure gradients that drove magma migration and the breakup of the metatexite. Thus, metatexite folding increased melt interconnectivity, while magma mobility increased strain rate and released differential stresses. You do not have access to this content, please speak to your institutional administrator if you feel you should have access.
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Prédiction distillée sur la base complète
Imitation des enseignantsNi prévalence calibrée, ni vérité terrain. Validation humaine à venir. Apprise à partir de 10 348 étiquettes directes de Codex et de 10 348 étiquettes directes de Gemma. Le mode candidate est l'union des têtes enseignantes seuillées; le consensus est leur intersection. Ces sorties portent le statut machine_predicted_unvalidated et ne sont ni des étiquettes humaines ni des étiquettes directes de modèles de pointe.
Scores Codex et Gemma par catégorie
| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,000 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,001 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,004 | 0,000 |
Scores machine (provisoires)
Les deux têtes enseignantes du modèle étudiant, lues sur ce travail. Un score ordonne la base pour la relecture; il n'affirme jamais une catégorie, et le statut de validation accompagne chaque rangée tel quel.
Scores de référence d'un modèle non mature (critères de maturité non atteints, 7 itérations). Un score ordonne; il n'affirme jamais une catégorie.
score_only:v0-immature-baseline · tel quel depuis la passe de notation : score_only signifie que le nombre peut ordonner les travaux, et qu'aucune étiquette de catégorie n'en découle