山东招远北截金矿床地质特征及深部成矿预测

对北截金矿的矿床与矿体地质构造及成矿模式和构造应力场的综合研究表明，北截金矿主要是受ＮＥ向的灵山沟－北截断裂控制，其储矿构造部位与与断裂带小角度斜交的ＮＮＥ向张剪性断裂，矿体主要分布于其中的２号矿带之中，矿体之间呈右行斜列为ＳＷ深部发展；百区内的ＮＷＷ向断裂为成矿后断裂，对矿体有较小的破坏作用；对矿区内Ａｕ、Ａｇ、Ａｓ、Ｍｏ、Ｓｂ、Ｂｉ进行的微量元素原生晕及Ａｇ／Ａｕ、Ａｓ／Ｍｏ与Ｓｂ／Ｂｉ比值分

Geological characteristics and deep metallogenic prognosis of the Beijie gold deposit in Zhaoyun area, Shandong Province

An integrated study of the geological structure of orebodies, the metallogenic model and the tectonic stress field shows that the Beijie gold deposit is mainly controlled by the NE-trending Lingshangou-Beijie fault zone, that the impounding structure seems to be NNE-trending tenso-shear fault which Intersects the above fault zone at small angles (some 5~10°), that orebodies are mainly distributed in No.2 ore belt and, assuming right-lateral oblique slip arrangement, extend southwestward toward the depth, and that the NWW-trending post-metallogenic fault zone somewhat destroyed orebodies. Primary halo analyses of Au, Ag, As, Mo, Sb and Bi as well as Ag/Au, As/Mo and Sb/Bi ratios demonstrate that the mined district is the front of the halo, whereas the depth of the southwest side is the rear of the halo. On such a basis, it is suggested quantitatively that the deep ore-prospecting target should be at the depth of -200 m~ -300 m between the footwall of the NWW-trending fault and No.142 exploration line.