Temperature and age constraints on the metamorphism of the Tethyan Himalaya in Central Nepal: A multidisciplinary approach

Crouzet, Christian; Dunkl, İstván; Paudel, Lalu Prasad; Árkai, Péter; Rainer, Thomas; Balogh, Kadosa; Appel, Erwin

doi:10.1016/j.jseaes.2006.07.014

Cited by 56 publications

(39 citation statements)

References 75 publications

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“…In contrast, the available ApHe data from the Dhaulagiri hanging wall-though sparse-indicate a distinctive low-temperature cooling history for that structural package that is consistent with the previously published ZrnFT data of Crouzet et al (2007). Samples from each drainage (KG-1 and MK-1) yielded statistically indistinguishable dates of 10.8 5 1.4 and 9.1 5 2.5 Ma.…”

Section: Thermochronologic Constraints On the Recentsupporting

confidence: 82%

“…Building on earlier work by Hurtado et al (2001) that yielded evidence for Quaternary slip along a reactivated segment of this struc- Geologic relationships modified from Colchen et al (1986), Vannay and Hodges (1996), Hurtado et al (2001), Hurtado (2002), and Godin (2003). In the Kali Gandaki valley, zircon fission-track ages are from Crouzet et al (2007), and apatite fission-track ages are from Arita and Ganzawa (1997); all zircon and apatite (U-Th)/He ages are from this study. Note that although Hurtado et al (2001) mapped a small section in the corner between the immediate hanging wall of the Annapurna-Dhumpu Detachment and the footwall of the Dangardzong Fault as Formation II, further field and laboratory evaluation of samples from this wedge of material suggests that it is instead Annapurna Yellow Formation.…”

Section: Geologic Contextsupporting

confidence: 58%

“…Indic- ative of the timing of cooling of samples below ca. 2057C (Bernet 2009), ZrnFT dates from the Annapurna-Dhumpu Detachment footwall are Pliocene or Quaternary (Arita and Ganzawa 1997), whereas dates from samples collected north of the trace of the detachment-and thus in its hanging wall-are Miocene (Crouzet et al 2007;figs. 2A, 6).…”

Section: Thermochronologic Constraints On the Recentmentioning

confidence: 99%

“…For new (U-Th/He) dates (circles; in Ma), apatite cooling ages are indicated with an "A" preceding the date, and zircon cooling ages are noted with a "Z" preceding the date. In the Kali Gandaki Valley, zircon fission-track ages are from Crouzet et al (2007). Abbreviations: A-DD p Annapurna-Dhumpu Detachment; DD p Dhaulagiri Detachment; KSZ p Kalopani Shear Zone; STFS p South Tibetan Fault System.…”

Section: Thermochronologic Constraints On the Recentmentioning

confidence: 99%

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Evidence for Pleistocene Low-Angle Normal Faulting in the Annapurna-Dhaulagiri Region, Nepal

McDermott¹,

Hodges²,

Whipple³

et al. 2015

The Journal of Geology

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Section: Thermochronologic Constraints On the Recentsupporting

confidence: 82%

Section: Geologic Contextsupporting

confidence: 58%

Section: Thermochronologic Constraints On the Recentmentioning

confidence: 99%

Section: Thermochronologic Constraints On the Recentmentioning

confidence: 99%

See 2 more Smart Citations

Evidence for Pleistocene Low-Angle Normal Faulting in the Annapurna-Dhaulagiri Region, Nepal

McDermott¹,

Hodges²,

Whipple³

et al. 2015

The Journal of Geology

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“…Due to the relative simplicity of the KI technique it continues to be widely applied to regional surveys of sub-greenschist facies metamorphism in pelitic rocks (e.g. Liu 2003;Crouzet et al 2007;Kim et al 2007;Ruiz Cruz 2008). Arkai (1991) and Arkai and Sadek Ghabrial (1997) have shown that there is a fairly strong positive correlation between crystallinity indices measured on the first two basal reflections of chlorite and those of illite in the < 2 m fractions of representative shaleslate -phyllite series from Paleozoic and Mesozoic formations in northeast Hungary.…”

Section: Introductionmentioning

confidence: 99%

Observations on the effect of proximity to rhyolitic intrusions on Kübler index

Diskin¹,

Coetzee²

2010

Mineralogia

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Abstract. The Upper Ordovician sedimentary succession of southeast Ireland is riddled with almost synsedimentary igneous intrusions. A study was required to determine any effects of these intrusions on Kübler Index (KI) so that further sampling for a regional study could be undertaken and the results would be unbiased. Sampling was carried out on the low-grade metapelites (Southeast Ireland) around the rhyolitic and doleritic intrusions, which were intruded into the still soft sediment. Clay mineralogy was determined using X-ray diffractometry and KI values were measured; SEM and whole rock elemental analyses were applied to complement the results of the XRD work. KIs immediately around rhyolitic intrusions were observed in all cases to be lower than the regional KI, however this was not seen around doleritic intrusions. SEM work shows illite grain sizes following the KI trend and K2O were noted to be highest where KI was lowest. Rare earth elements (REEs) show some mobilization which also follows the KI trend. This is considered to be a residual effect of hydrothermal fluids / volatiles hosted by the rhyolites but not encountered in the dolerites. Chlorite crystallinity is not affected as it most likely crystallized after the hydrothermal event. The KI is often used as a proxy for illite crystallinity in studies of low grade metamorphism but is influenced by many parameters and care should be taken when applying this technique to studies of regional metamorphism.

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Controls on Cenozoic exhumation of the Tethyan Himalaya from fission‐track thermochronology and detrital zircon U‐Pb geochronology in the Gyirong basin area, southern Tibet

et al. 2016

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The Gyirong basin, southern Tibet, contains the record of Miocene‐Pliocene exhumation, drainage development, and sedimentation along the northern flank of the Himalaya. The tectonic controls on basin formation and their potential link to the South Tibetan Detachment System (STDS) are not well understood. We use detrital zircon (ZFT) and apatite (AFT) fission‐track analysis, together with detrital zircon U‐Pb dating to decipher the provenance of Gyirong basin sediments and the exhumation history of the source areas. Results are presented for nine detrital samples of Gyirong basin sediments (AFT, ZFT, and U‐Pb), two modern river‐sediment samples (ZFT and AFT), and six bedrock samples (ZFT) from transect across the Gyirong fault bounding the basin to the east. The combination of detrital zircon U‐Pb and fission‐track data demonstrates that the Gyirong basin sediments were sourced locally from the Tethyan Sedimentary Sequence. This provenance pattern indicates that deposition was controlled by the Gyirong fault, active since ~10 Ma, whose vertical throw was probably < ~5000 m, rather than being controlled by normal faults associated with the STDS. The detrital thermochronology data contain two prominent age groups at ~37–41 and 15–18 Ma, suggesting rapid exhumation at these times. A 15–18 Ma phase of rapid exhumation has been recorded widely in both southern Tibet and the Himalaya. A possible interpretation for such a major regional exhumation event might be detachment of the subducting Indian plate slab during the middle Miocene, inducing dynamic uplift of the Indian plate overriding its own slab.

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Temperature and age constraints on the metamorphism of the Tethyan Himalaya in Central Nepal: A multidisciplinary approach

Cited by 56 publications

References 75 publications

Evidence for Pleistocene Low-Angle Normal Faulting in the Annapurna-Dhaulagiri Region, Nepal

Evidence for Pleistocene Low-Angle Normal Faulting in the Annapurna-Dhaulagiri Region, Nepal

Observations on the effect of proximity to rhyolitic intrusions on Kübler index

Controls on Cenozoic exhumation of the Tethyan Himalaya from fission‐track thermochronology and detrital zircon U‐Pb geochronology in the Gyirong basin area, southern Tibet

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