K-Ar biotite ages from Miocene post-collisional Garam Chashma leucogranite, eastern Hindukush Range (Trans-Himalayas), northwestern Pakistan.

Zafar, Mohammad; Murata, Mamoru; Khan, Tahseenullah; Ozawa, Hiroaki; Nishimura, Hiroshi

doi:10.2465/jmps.95.101

Cited by 5 publications

(2 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Finally, U-Pb ID-TIMS analyses on monazite and xenotime grains from a specimen collected from the Garam Chasma pluton yielded a discordant age of 24 ± 0.5 Ma . This is consistent with 18-20 Ma K-Ar (biotite) dates from the same body if they are interpreted to represent cooling and not crystallization (Zafar et al, 2000).…”

Section: Background Geology and Existing Chronologysupporting

confidence: 77%

“…Their occurrence has been variably attributed to subduction and/or collision-related crustal thickening processes (e.g. Desio, 1964;Debon et al, 1987;Hildebrand, 1998;Hildebrand et al, 2000;Zafar et al, 2000;Zanchi et al, 2000;Hildebrand et al, 2001;Heuberger et al, 2007). This study examines the petrogenesis and tectonic significance of the Kafiristan, Tirich Mir, Buni-Zom and Garam Chasma plutons based on new major, trace and rare earth element (REE) data and integrated U(Th)-Pb (zircon/ monazite) geochronology.…”

Section: Introductionmentioning

confidence: 98%

See 1 more Smart Citation

Rifting, subduction and collisional records from pluton petrogenesis and geochronology in the Hindu Kush, NW Pakistan

et al. 2016

View full text Add to dashboard Cite

New U-(Th)/Pb geochronology and geochemical analyses of plutonic bodies in the Hindu Kush range, NW Pakistan, provide insight on the crustal growth and tectonic evolution of the southern Eurasian margin. These new data outline a protracted magmatic history that spans the Cambrian to the Neogene (ca. 538 to 23 Ma) and record a variety of petrogenetic associations variably influenced by within plate, volcanic arc, and collision tectonic environments. The Kafiristan pluton (538 ± 4 to 487 ± 3 Ma) yields geochemical signatures consistent with extensional plutonism and rifting of the Hindu Kush terrane from Gondwana. The Tirich Mir (127 ± 1 to 123 ± 1 Ma) and Buni-Zom (110 ± 1 to 104 ± 1 Ma) plutons have geochemical signatures that can be attributed to a subduction related continental volcanic arc system that developed along the southern margin of Eurasia in the Mesozoic. The Garam Chasma pluton, the youngest body in the study area (27.3 ± 0.5 to 22.8 ± 0.4 Ma), yields a geochemical signature consistent with widespread anatexis during crustal thickening related to the development of the Himalaya. The present geochemical and geochronological analysis from the Hindu Kush have produced important new constraints on the timing of tectonic events and variable tectonic settings along the south Eurasian margin before and after the continued India-Asia collision.

show abstract

Section: Background Geology and Existing Chronologysupporting

confidence: 77%