Paleomagnetism of Paleozoic sedimentary rocks from the Karatau Range, Southern Kazakhstan: Multiple remagnetization events correlate with phases of deformation
Paleomagnetism of Paleozoic sedimentary rocks from the Karatau Range, Southern Kazakhstan: Multiple remagnetization events correlate with phases of deformation
复制标题
哈萨克斯坦南部卡拉套山脉古生代沉积岩的古磁性:多次重磁化事件与变形阶段相关
DOI:
10.1002/jgrb.50253
复制
发表时间:
2013
期刊:
影响因子:
--
通讯作者:
Bachtadse
中科院分区:
文献类型:
--
作者:
Kirscher;Alexeiev;Echtler;Bachtadse
The paleogeography of the Altaids and its kinematic and tectonic evolution during the final collision and amalgamation of Eurasia is still poorly known. Addressing this problem, a paleomagnetic study has been undertaken on Paleozoic sedimentary rocks from the Karatau, Southern Kazakhstan. Stepwise thermal demagnetization reveals the presence of a high‐temperature component of magnetization in most samples. Fold tests indicate a syn‐folding age of magnetic remanence acquisition at three of the five areas studied. Directional data of Devonian and Permian rocks yield a positive fold test, implying a primary magnetization. Resulting prefolding paleolatitudes for Permian and Devonian rocks show the proximity of the Karatau to Baltica during those times. Syn‐ and post‐folding magnetizations result in paleolatitudes for Karatau, which intersect the paleolatitude curve based on the Baltica apparent polar wander path (APWP), at times, which can be correlated to major deformational events at ~280 Ma, ~260 Ma, and ~230 Ma, respectively. We interpret this with complicated pattern of remagnetization events accompanying deformation, which can include syn‐folding remagnetization events and areas of primary magnetic signals. Additionally, the differences between reference declinations based on the APWP for Baltica and observed declinations suggest successive counterclockwise rotational reorganization of the Karatau during the late Paleozoic to Early Mesozoic, with maximal rotation values of ~65° with respect to Baltica. The remagnetization events are correlated with latest intracontinental stages of orogenic evolution in the Ural mountains and thus the Paleozoic amalgamation of the Eurasian continent and suggest synchronous and coherent tectonic evolution in the Urals and Karatau mountains.
登录
查看更多内容
DOI:
--
发表时间:
1991
期刊:
影响因子:
--
作者:
H. Cook;M. K. Apollonov;Michael E. Taylor;S. V. Zhemchuzhnikov;S. V. Dubinina;Ludmila Mel’nikova
通讯作者:
Ludmila Mel’nikova
DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
V. Bachtadse;R. Voo;F. Haynes;S. Kesler
通讯作者:
S. Kesler
DOI:
--
发表时间:
1998
期刊:
影响因子:
--
作者:
M. Smethurst;A. Khramov;S. Pisarevsky
通讯作者:
S. Pisarevsky
DOI:
10.1098/rspa.1953.0064
发表时间:
1953-01-01
影响因子:
--
作者:
FISHER, R
通讯作者:
FISHER, R
DOI:
--
发表时间:
1995
期刊:
影响因子:
--
作者:
M. Bazhenov;Valerian L. Klishevich;V. Tselmovich
通讯作者:
V. Tselmovich