|
��չ���� |
|
| ������Ϣ | |
 |
Supporting info |
|
PDF(1584KB) |
|
[HTMLȫ��] |
|
�����[PDF] |
|
����� |
| �����뷴�� | |
|
�������ù����� |
|
���� |
|
Email Alert |
|
���·��� |
|
���������Ϣ |
| ���Ĺؼ���������� | |
|
��ľɽ�� |
|
��м�ʯ |
|
U- - Pb ͬλ�ز��� |
|
���ɵؿ� |
|
�ز����� |
| ��������������� | |
|
����Ԫ |
|
���� |
|
�ŵ¾� |
|
���� |
|
��Ծ�� |
| PubMed | |
|
Article by Yang, Z. Y. |
|
Article by Liu, H. |
|
Article by Zhang, D. J. |
|
Article by Li, X. |
|
Article by Sun, Y. W. |
���ɹŰ��ƶ���������ľɽ��ɰ�ҵ���м�ʯ LA- -ICP- -MS U- -Pb ͬλ�����ѧ���������ʾ�����������ľɽ�����м�ʯ��Ҫ�ɹ����� (354 ��479 Ma) ��Ԫ���� (934 ��1 941 Ma) �������Ĺ�Ԫ��—��̫�Ŵ� (2 330 ��2 688 Ma) ��м�ʯ��ɡ���ϸ���ģʽ�����ʵ��� ? �� ��ʯ���о���������Ϊ����ľɽ�麬 934 ��1 941 Ma ��м�ʯ��ɰ����Դ�����ڼ��ɵؿ飬���ǻ������; ���� Spha- eroschwagerina ��ʯ���İ�ľɽ��Ӧ�����ڼ��ɵؿ�Ĵ�½��Ե��������һ��ʶ�����о�����ľ�ӷ�ϴ���������Ĺ����ݻ����Լ������ɹŲ�ԭ—�ɻ����ز���������ɵز�����Ⱦ�����Ҫ���塣
Based on the study of the detrital zircon U- - Pb isotopic dating of the sandstone from the type section of Amushan Formation in Bayan Obo area��Inner Mongolia��the zircons from the Lower Permian sandstone include of ages of 354 �� 479 Ma (Paleozoic)��934 �� 1 941 Ma (Proterozoic) and 2 330 �� 2 668 Ma (Siderian- -Neo- archean)�� Combined with the fusulinids of the type section�� the authors conclude that the components of Proterozoic zircons (934 �� 1 941 Ma) in the sandstone of the Amushan Formation should came from the Jiamusi - -Mongolia block��rather than from the North China Plate�� The Amushan Formation bearing fusulinids of the Biozone of Spha- eroschwagerina might be deposited at the continental margins of the Jiamusi- - Mongolia block�� The present research would be helpful for investigating the tectonic evolution of the Xar Moron ��iver Suture and the Paleo- - Asian Ocean�� and gives great support to assign the Inner Mongolia Grassland - - Songhua ��iver Stratigraphic ��egion to the Jiamusi - - Mongolia Stratigraphic Superregion��