��������ɽ�ֳ�����ǽ������ڱ����������ֵ�һ�����͵�����ʯӢ���ͽ�󡣶�����ɿ��ϵ���е������������ʯ��������ϸ�о��Ľ����ʾ�����ʯ��U--Pb ����ɷ�Ϊ6 ��: 1 057 ± 9 Ma��199 ± 2 Ma��144 �� 148 Ma��115 ± 2. 7 Ma��111. 6 ± 1. 7 Ma ( n = 6��MSWD = 0. 55��probability = 0. 77) ��107. 3 ± 2. 8 Ma ( n = 3��MSWD = 0. 088��probability = 0. 92) ����������ҽ����¼��ķ���״���������ж��������ҵ��ҽ���λ��115 �� 107 Ma���ҽ��ݻ������ܵ���Ԫ�Ŵ�����٪������������ʯ��ǿ�һ�Ⱦ; �ɿ����÷���������������������������ת���׶Σ�����ҳɿ󱳾���̫ƽ���鸩�������������Ի������ҽ�����������ء�

Sishanlinchang ore deposit is a typical gold deposit in sulfide quartz vein type��and found in Bindong area in recent years�� The authors studied the zircon of diorite-porphyrite closely related to mineralization��which results show that the zircon U--Pb dating in diorite-porphyrite can be inducted six groups i. e�� 1 057 ± 9 Ma��199 ± 2 Ma��144 �� 148 Ma��115 ± 2. 7 Ma��111. 6 ± 1. 7 Ma ( n = 6��MSWD = 0. 55��probability = 0. 77) and 107. 3 ± 2. 8 Ma ( n = 3��MSWD = 0. 088��probability = 0. 92) �� Combined with considerations of the development of the regional thermal event of magma��the authors suggested that diorite magma emplaced in 115 �� 107 Ma��and its evolution underwent the strong contamination by granitic rock in Mesoproterozoic and Early Jurassic�� The mineralization occurred in the conversion stage from later Early Cretaceous to Late Cretaceous��and its metallogenetic and diagenetic background was related to mid-acid granitic magmatism by the subduction of the Pacific plate��