Lead Isotopic Compositions of the Kohistan-Ladakh Terrane in NW Himalayan Syntax, Pakistan and their Tracer Significance

L&#220; Pengrui; YAO Wenguang; WU Liang; HONG Jun

Northwestern Geology > 2015 > 48(1): 56-62.

LÜ Pengrui, YAO Wenguang, WU Liang, et al. Lead Isotopic Compositions of the Kohistan-Ladakh Terrane in NW Himalayan Syntax, Pakistan and their Tracer Significance[J]. Northwestern Geology, 2015, 48(1): 56-62.

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Lead Isotopic Compositions of the Kohistan-Ladakh Terrane in NW Himalayan Syntax, Pakistan and their Tracer Significance

Xi'an Center of Geological Survey, CGS, Xi'an 710054, Shaanxi, China

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Received Date: January 19, 2014
Revised Date: April 27, 2014
Available Online: July 28, 2022
Published Date: March 04, 2015

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Abstract

Served as an important part of northwest Himalayan syntax, the Kohistan-Ladakh terrane is characterized by the mixed source in the lead isotopic compositions. On the basis of previous studies, the lead isotopic compositions of the Kohistan-Ladakh terrane have been re-analyzed, and their H-H single-stage evolution model ages as well as characteristic parameters (such as, μ values, ω values, Th/U ratios, Δβ values and Δγ values) are calculated in this paper. The study results show that, the lead is mainly derived from the crust-mantle mixing substances, mixed with some crustal materials from Asian continent, and their types are similar to the subducted lead compositions that controlled by magmatism. The results indicated that their lead isotopic compositions displayed the DUPAL abnormal characteristics. Thus, it is speculated that the anomalous lead may come from Asian continent margin, which can serve as basic reference for studying magmatism and evolution in this area.
- NW Himalayan Syntax,
- Kohistan-Ladakh terrane,
- lead isotope,
- Pakistan

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Lead Isotopic Compositions of the Kohistan-Ladakh Terrane in NW Himalayan Syntax, Pakistan and their Tracer Significance

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