Tectonics of Himalaya, Middle East and South-East Asia

Oman Mountains and the Arabian plate

Aerial view of the Oman Ophiolite mantle sequence and gabbros overlying Arabian Plate shelf carbonates at Jebel NakhlOman Mountains, Arabia (Oman and United Arab Emirates): We are studying the stratigraphy, structure, petrogenesis, thermobarometry and timing of the Oman Ophiolite formation and emplacement onto the passive continental margin of Arabia. The latter stages include the deep subduction of the Arabian continental margin beneath the oceanic - ophiolitic hangingwall. Ongoing projects in Oman and UAE include:

  1. Origin and Obduction of the Oman Ophiolite; sub-ophiolite subduction zone metamorphism in the sole (granulite, amphibolite and greenschist facies); crustal melt leucogranites in UAE.
  2. High-Pressure metamorphism (eclogite, blueschist, carpholite grade) in NE Oman. Structures include the Wadi Mayh mega-sheath fold and the As Sifah eclogite dome.
  3. The Oman - UAE foreland fold-thrust belt; combining balanced and restored cross-sections with regional seismic and gravity profiles and well data.
  4. Structure of the Musandam Peninsula and initiation of Zagros collision, Straits of Hormuz syntaxis.
  5. Emplacement of the Masirah Ophiolite SE Oman, and formation of the Batain mélange. 

Dead Sea Fault, Syria, Lebanon, Palestine, Jordan

View of the Dead Sea Fault from the Space ShuttleThis project aims to unravel the geological history of the left-lateral Dead Sea Fault. We combine structural mapping with balanced and restored cross-sections, fracture analysis, stratigraphy, seismic, magnetic, gravity and well data, and Ar-Ar dating of basalts cut by the fault.

  1. Structure of the Palmyride transpressional fold belt, Syria; balanced and restored cross-sections.
  2. Dead Sea Fault, northern Syria; structural mapping combined with balanced and restored cross-sections across the Coastal Ranges; structural profiles across the Al-Ghab depression and Dead Sea Fault between Crac des Chevalier and Mesyef.
  3. Ar-Ar dating of Neogene alkali volcanic rocks offset by the Dead Sea fault, northern Syria.
  4. Structure of the Dead Sea pull-apart basin, Jordan.
  5. Structure of the Petra - Wadi Rum - Aqaba region, southern Jordan; fractures and strain associated with left-lateral shear along the Dead Sea Fault.

 


Himalaya

Aerial image of Nun-Kun Zanskar Himalaya Himalaya (Pakistan, India, Nepal, Sikkim, Bhutan): We are undertaking regional mapping and structural studies in combination with thermobarometry, determining P-T-t paths, metamorphic modeling and U-Th-Pb dating of accessory minerals. The major projects presently active are:
  1. Pliocene-Pleistocene metamorphism, melting and formation of cordierite leucogranites in the Nanga Parbat Syntaxis, Pakistan.
  2. Ultra-High Pressure metamorphism (coesite eclogites) and deep subduction of Indian crust Kaghan (Pakistan) and Tso Morari (India).
  3. Subduction-related metamorphism along the Main Mantle Thrust, Kohistan Arc (Pakistan).
  4. Origin and Emplacement of the Spontang Ophiolite and Indus suture zone, Ladakh (India).
  5. Crustal shortening and thickening mechanisms across Ladakh - Zanskar Himalaya (India).
  6. Structural, metamorphic and magmatic evolution of the Zanskar Kishtwar High Himalaya (India).
  7. Structural, metamorphic and magmatic evolution of the Garhwal (Shivling, Bhagirathi, Meru) Himalaya (India).
  8. Structrual evolution and inverted metamorphism along the Main Central Thrust zone (India, Nepal).
  9. South Tibetan Detachment low-angle normal faulting in the Himalaya (Zanskar, Nepal, South Tibet).
  10. Structural, metamorphic and magmatic evolution of the Annapurna-Manaslu Himalaya (Nepal).
  11. Structure, metamorphism and melting in the Langtang Shisha Pangma Himalaya (Nepal, South Tibet).
  12. Structure, metamorphism, anatexis and leucogranite formation (Channel Flow) in the Everest Makalu Himalaya (Nepal, South Tibet).
  13. Structure, metamorphism and melting in the Eastern Himalaya (Kangchenjunga, Sikkim, Bhutan).

Karakoram and Tibet

karakoram_250x500Karakoram Hindu Kush Ranges (Pakistan, Ladakh, SW Tibet): We are undertaking regional mapping and structural studies in combination with thermobarometry, determining P-T-t paths, metamorphic modeling and U-Th-Pb dating of accessory minerals. The major projects presently active are:

  1. Regional mapping of the Central Karakoram Ranges in the Hunza, Biafo, Shimshal, Snow Lake, Baltoro and Hushe regions (North Pakistan).
  2. Baltoro granite batholith petrogenesis, evolution and age in the Latok - Ogre, Trango Towers - Biale, Masherbrum, K7, Kondus and Bilafond glacier regions.
  3. Metamorphic evolution, P-T-t paths, pseudosection modeling and U-Th-Pb dating of accessory minerals along the Karakoram metamorphic complex.
  4. Structural evolution of the Karakoram Fault, K2 - Gasherbrum Ranges, Siachen Nubra Pangong region (North Pakistan, North India).
  5. Structural and thermal evolution of the Hindu Kush Ranges, NW Frontier (Pakistan Afghanistan).

Tibetan Plateau: Indus - Tsangpo suture zone ophiolites, ophiolitic mélanges, U-Pb dating of trondhjemites, dacites from ophiolites, strtigraphy and timing of molasse deposits, ultra-potassic dykes; Gangdese granite magmatism and structural evolution of the India-Asia collision zone.


Karakoram Fault

Satellite composite picture of the Karakoram FaultKarakoram Fault (Ladakh, Xinjiang, western Tibet). We are carrying out detailed structural mapping including microstructural kinematic analysis in combination with U-Pb dating of metamorphic rocks and pre- syn- and post-kinematic granites.

  1. Tangtse - Muglib profile, the Darbuk-Shyok transect and Nubra valley, northern Ladakh.
  2. Active tectonics in the Tangste - Muglib - Pangong Lake region and Nubra valley, Ladakh. Cosmogenic dating of offset Quaternary terraces in combination with studies of earthquake relocation, InSAR and GPS.
  3. K2 - Gasherbrum Ranges, North Pakistan and Shaksgam valley (southern Xinjiang). Combining structural mapping with U-Pb, Ar-Ar, Fission track and U-Th-He dating to constrain exhumation and rock uplift histories along the Karakoram Fault.

Red River Shear Zone

Red River Shear ZoneRed River shear zone (Yunnan, Vietnam):

  1. Structural mapping of the Ailao Shan, Diancang Shan (Yunnan) and DayNuiConVoi (Vietnam) metamorphic complexes along the Red River shear zone; Sapa metamorphic rocks, FanSiPan alkali granite-syenite; Luc Yen ruby - phlogopite marbles.
  2. U-Pb dating of pre- syn- and post-kinematic granites and high-grade metamorphic rocks exhumed along teh Red River Fault, in order to constrain age of strike-slip ductile shear and faulting.

Southeast Asia

Geological map of Burma/Thailand

  1. Mogok metamorphic belt, Sagaing fault (Burma):-
    • Structural mapping of high-grade Mogok metamorphic rocks; P-T-t paths of sillimanite and andalusite schists.
    • U-Pb dating of metamorphic and magmatic rocks along teh Mogok belt.
    • Tectonic history of the Sagaing fault zone; evolution of the Jade Mines belt.
    • Relocation of earthquakes along the deep Burma seismic zone.
  2. Mae Ping and Three Pagodas fault (Thailand):
    • Structural mapping along the Lansang gneiss, combined with regional stratigraphic, seismic, and well data to constrain timing of motion and amount of offset along the faults.
    • U-Pb dating of high-grade metamorphic rocks, mylonites and granites along the Mae Ping (Wang Chao) Fault.
    • Doi Inthanon and Doi Suthep metamorphic core complexes, North Thailand.
  3. Thailand - Malay tin granite belt:
    • Petrogenesis, U-Pb dating of I-type and S-type granites and tin-tungsten mineralisation from Phuket Island across the Malay peninsula to Tioman Island and the Tin Islands.
  4. Andaman Islands ophiolites (India):
    • Structural mapping, combined with U-Pb dating of trondhjemites, gabbro - dacites of the ophiolite sequence and overlying arc-related volcanics.
    • Documentation of uplift and subsidence across the Andaman Islands as a result of the December 24th 2004 earthquake.

Scotland

Moine Thrust Zone, Assynt (NW Scotland): Structural mapping, construction of balanced and restored cross-sections and interpretation of the timing and evolution of the Moine Thrust zone, using cross-cutting relationships of the Loch Ailsh and Borralan alkali intrusions.

Cross section of the Southern Assynt Window, Moine Thrust Zone, Scotland