In:
Acta Geologica Sinica - English Edition, Wiley, Vol. 91, No. 4 ( 2017-08), p. 1231-1247
Abstract:
Seventeen new 40 Ar/ 39 Ar analyses reported for ten Tarim Precambrian basement samples from the Kuluketage area, are applied to reconstruct the regional thermo‐tectonic history together with previously published data. Eight samples were taken adjacent to the Xingdi and Xinger faults, major structures in the study area, whereas a further two were sampled at some distance from the faults. 40 Ar/ 39 Ar data from the latter record rapid cooling following a Neoproterozoic magmatic/metamorphic event and mild Paleozoic thermal disturbance. Paleozoic 40 Ar/ 39 Ar ages from the study area, as well as from the Central Tianshan and eastern Southern Tianshan suggest two strong deformational periods at ∼390 Ma and ∼300 Ma. During the older period, argon isotopic systems were reset/disturbed by high temperature related to arc magmatism resulting from subduction of the South Tianshan paleo‐oceanic crust, possibly in combination with reactivation of Precambrian faults. The younger period is characterized by widespread late Carboniferous‐early Permian intracontinental deformation, which is related to the final amalgamation of the Central Asian Orogenic Belt. Previously published apatite fission track data attest to a long history of post‐collisional cooling, which is attributed to continued propagation of deformation within the Central Asian Orogenic Belt.
Type of Medium:
Online Resource
ISSN:
1000-9515
,
1755-6724
DOI:
10.1111/acgs.2017.91.issue-4
DOI:
10.1111/1755-6724.13357
Language:
English
Publisher:
Wiley
Publication Date:
2017
detail.hit.zdb_id:
2420386-5
SSG:
6,25
