scholarly journals Tso Morari coesite eclogite: pseudosection predictions v. the preserved record and implications for tectonometamorphic models

2018 ◽  
Vol 474 (1) ◽  
pp. 5-24 ◽  
Author(s):  
Patrick J. O'Brien
Keyword(s):  
Tso Morari

Dating the Indian continental subduction and collisional thickening in the northwest Himalaya: Multichronology of the Tso Morari eclogites

Geology ◽  
2000 ◽  
Vol 28 (6) ◽  
pp. 487-490 ◽  
Author(s):  
Julia de Sigoyer ◽  
Valérie Chavagnac ◽  
Janne Blichert-Toft ◽  
Igor M. Villa ◽  
Béatrice Luais ◽  
...  
Keyword(s):  
Northwest Himalaya ◽  
Continental Subduction ◽  
Tso Morari

Cretaceous isochron ages from K–Ar and 40Ar/39Ar dating of eclogitic rocks in the Tso Morari Complex, western Himalaya, India

2006 ◽  
Vol 9 (4) ◽  
pp. 426-440 ◽  
Author(s):  
Chitaro Gouzu ◽  
Tetsumaru Itaya ◽  
Hironobu Hyodo ◽  
Talat Ahmad
Keyword(s):  
Western Himalaya ◽  
Tso Morari

Fluids in coesite-bearing rocks of the Tso Morari Complex, NW Himalaya: evidence for entrapment during peak metamorphism and subsequent uplift

2009 ◽  
Vol 146 (6) ◽  
pp. 876-889 ◽  
Author(s):  
BARUN K. MUKHERJEE ◽  
HIMANSHU K. SACHAN
Keyword(s):  
High Salinity ◽  
Granulite Facies ◽  
Ultrahigh Pressure ◽  
Nw Himalaya ◽  
Rock Interaction ◽  
Low Salinity ◽  
Ultrahigh Pressure Metamorphism ◽  
Indian Lithosphere ◽  
External Sources ◽  
Tso Morari

AbstractFluid inclusions trapped in coesite-bearing rocks provide important information on the fluid phases present during ultrahigh-pressure metamorphism. The subduction-related coesite-bearing eclogites of the Tso Morari Complex, Himalaya, contain five major types of fluids identified by microthermometry and Raman spectroscopy. These are: (1) high-salinity brine, (2) N2, (3) CH4, (4) CO2and (5) low-salinity aqueous fluids. These fluids were trapped during both deep subduction and exhumation processes. The coesite-bearing rocks are inferred to have been buried to a depth of >120 km, where they experienced ultrahigh-pressure metamorphism. The fluid–rock interaction provides direct evidence for fluid derivation during a deep subduction process as demonstrated by silica–carbonate assemblages in eclogite. High salinity brine, N2and CH4inclusions are remnants of prograde and peak metamorphic fluids, whereas CO2and low-salinity aqueous fluids appear to have been trapped late, during uplift. The high-salinity brine was possibly derived from subducted ancient metasedimentary rocks, whereas the N2and CH4fluids were likely generated through chemical breakdown of NH3-bearing K minerals and graphite. Alternatively, CH4might have been formed by a mixed fluid that was released from calcareous sediments during subduction or supplied through subducted oceanic metabasic rocks. High density CO2is associated with matrix minerals formed during granulite-facies overprinting of the ultrahigh-pressure eclogite. During retrogression to amphibolite-facies conditions, low-salinity fluids were introduced from external sources, probably the enclosing gneisses. This source enhances salinity differences as compared to primary saline inclusions. The subducting Indian lithosphere produced brines prior to achieving maximal depths of >120 km, where fluids were instead dominated by gaseous phases. Subsequently, the Indian lithosphere released CO2-rich fluids during fast exhumation and was then infiltrated by the low-salinity aqueous fluids near the surface through external sources. Elemental modelling may improve quantitative understanding of the complexity of fluids and their reactions.

scholarly journals Petrology and geochronology of eclogitic and retrograde micas from Tso Morari UHP Complex, Ladakh Himalaya

1970 ◽  
Vol 5 (7) ◽  
pp. 167
Author(s):  
Igor M Villa ◽  
Julia De Sigoyer ◽  
Stéphane Guillot
Keyword(s):  
Special Issue ◽  
Ladakh Himalaya ◽  
Tso Morari

DOI = 10.3126/hjs.v5i7.1342 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.167

scholarly journals Geohistory of Tso-Morari Crystalline, Eastern Ladakh, India: a plausible model for ultra-high pressure rocks in the Himalaya

1970 ◽  
Vol 5 (7) ◽  
pp. 139-140 ◽  
Author(s):  
Ram S Sharma
Keyword(s):  
High Pressure ◽  
Special Issue ◽  
Ultra High Pressure ◽  
Plausible Model ◽  
The Himalaya ◽  
Tso Morari

DOI = 10.3126/hjs.v5i7.1321 Himalayan Journal of Sciences Vol.5(7) (Special Issue) 2008 p.139-140

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