TY - JOUR
T1 - Mid-Miocene (post 12 Ma) displacement along the central Karakoram fault zone in the Nubra Valley, Ladakh, India from spot LA-ICPMS U/Pb zircon ages of granites
AU - Brookfield, Michael E.
AU - Chung, Sun Lin
AU - Shellnutt, J. Gregory
N1 - Publisher Copyright:
© 2017, Geological Society of India.
PY - 2017/3/1
Y1 - 2017/3/1
N2 - The Karakoram fault zone is a prominent right lateral fault that connects the frontal thrust of the North Pamir with the Indus suture zone near Mount Kailas. Its nature and age of initiation is controversial. In the Nubra valley, Ladakh, India, a Karakoram range granite is thrust over Cretaceous magmatic arc rocks and this thrust is cut by a western strand of the Karakoram fault zone. Three different lithologies from this granite gave weighted mean zircon U/Pb ages of 12.92±0.77 Ma, 12.41±0.43 Ma, and 11.72±0.31 Ma. The ages indicate a relatively short intrusive history of about 1 Ma for the phases: the geochemistry is practically identical to the Pangong leucogranites in the same tectonic block. The Karakoram fault zone in this area is thus less than ~12 Ma old which supports a post middle Miocene (Serravallian) age of Karakoram fault initiation in this area.
AB - The Karakoram fault zone is a prominent right lateral fault that connects the frontal thrust of the North Pamir with the Indus suture zone near Mount Kailas. Its nature and age of initiation is controversial. In the Nubra valley, Ladakh, India, a Karakoram range granite is thrust over Cretaceous magmatic arc rocks and this thrust is cut by a western strand of the Karakoram fault zone. Three different lithologies from this granite gave weighted mean zircon U/Pb ages of 12.92±0.77 Ma, 12.41±0.43 Ma, and 11.72±0.31 Ma. The ages indicate a relatively short intrusive history of about 1 Ma for the phases: the geochemistry is practically identical to the Pangong leucogranites in the same tectonic block. The Karakoram fault zone in this area is thus less than ~12 Ma old which supports a post middle Miocene (Serravallian) age of Karakoram fault initiation in this area.
UR - http://www.scopus.com/inward/record.url?scp=85016388658&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85016388658&partnerID=8YFLogxK
U2 - 10.1007/s12594-017-0595-x
DO - 10.1007/s12594-017-0595-x
M3 - Article
AN - SCOPUS:85016388658
SN - 0016-7622
VL - 89
SP - 231
EP - 239
JO - Journal of the Geological Society of India
JF - Journal of the Geological Society of India
IS - 3
ER -