Constraints of fission track dating after the Pan-African tectonic evolution of the Bangweulu Block, northeastern Zambia

被引：0

作者：

Ren J. ^{[1
]}

Wang J. ^{[1
]}

Gu A. ^{[1
]}

Sun H. ^{[1
]}

Zuo L. ^{[1
]}

He F. ^{[1
]}

Chipilauka M. ^{[2
]}

Alphet Phaskani D. ^{[2
]}

Ezekiah C. ^{[2
]}

Evaristo K. ^{[2
]}

机构：

[1] Tianjin Center, China Geological Survey, Tianjin

[2] Geological Survey Department of Zambia, P. O. Box 50135, Lusaka

来源：

Dizhi Xuebao/Acta Geologica Sinica | 2021年 / 95卷 / 04期

关键词：

Bangweulu Block; Fission track thermochronology; Kapatu; Northeastern Zambia; Zircon and apatite;

D O I：

10.19762/j.cnki.dizhixuebao.2021018

中图分类号：

学科分类号：

摘要：

The main tectonic evolution times of the Bangweulu Block since the Pan-African tectonic activities were studied in this paper using the zircon and apatite fission track methods. The Kapatu is located in the center part of the Bangweulu Block, northeastern Zambia. In order to study the tectonic activities of the Bangweulu Block, fresh rock samples from Mbala, Nsama and Kabweluma Formations of the Mporokoso Group were collected in Kapatu. The five zircon fission track ages are between 575±35 Ma and 380±22 Ma and the ages may be divided into two groups, i.e.600~572 Ma and 420~390 Ma. The two apatite fission track ages are between 59±6 Ma and 27±4 Ma and the ages can be divided into two groups, i.e.99~80 Ma and 19~11 Ma. All four ages groups which respectively correspond to the main periods of the Neoproterozoic Ediacaran, Lower Devonian, Late Cretaceous and Miocene. Compared with the ages from southern Africa, the tectonic activities of Neoproterozoic Ediacaran, Lower Devonian, Late Cretaceous involve a wide area and the tectonic activity during the Miocene(19~11 Ma) is not yet clear. Since the Pan-African tectonic evolution, the Bangweulu Block at least has been affected in 600~572 Ma, 488~441 Ma, 420~390 Ma, 375~293 Ma, 99~80 Ma and 19~11 Ma. Since limited data after the Pan-African tectonic evolution of the Bangweulu Block are available, these results provide important information for future work. © 2021, Science Press. All right reserved.

引用

页码：1072 / 1081

页数：9

共 37 条

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