宣化小营盘金矿的控矿构造研究

本文建立了高等级公路路面排水街沟缘石开孔入水口截水量公式，并据收集的实测资料确定了截水量经验系数的计算式，同时进行了误差计算。为工程设计提供了一个科学的设计计算方法，供应用参考。

Tectonic controls over the development of the Xiaoyingpan gold deposit, Xuanhua, Hebei province

Detailed research has been made on tectonic events as well as the accom-panying metamorphism and 11eat events in the Xiaoyingpan gold ore distri-ct, Hebei Province. It is pointed out that there exists a ductile shear zone ofamphibolite facies and a seri`es of subsequent thnists gently dipping downinto a detachment surface lying in the central pazt of the shear zone. Further-more, plenty of defornlation suggests that the activities of these two diffe-rent tectonic deformations on different levels occurred in reverse directions.Thin section studies also confirm their existence and reveal their time relati-onship. Gold ore mainly occurs in the detachment zone with abundant spaceformed by lots of fractures and proper temperature; nevertheless, mylonitesin both haziging and lyizig walls of the detathment rarely contain auriferousquartz veins unless they are cut by thrusts. In view of some geological evidence on the North China plate affected by the Yangtse plato,it is thoughtthat these two different tectonic events took place in Mesozoic. Therefore,it isreasonable to hoid that our research has made a breakthrough in the study ofregional tectonics of this gold district. In the end, some useful suggestions aregivon to enlarge the area of the gold ore district. It is comidered that follow-up survey should be done in NW and SE diretions east of the Hujiaapoii faultand also in NW direction west of the fault.