湖北枣阳大阜山金红石矿床石榴石的环状产状及其与成矿的关系

大阜山金红石矿床矿石中的石榴石主要呈多形态环状产出,环内矿物主要为金红石、角闪石及绿泥石,少量钛铁矿等;环外和石榴石晶间矿物主要为角闪石和绿泥石。几乎所有的石榴石环内均分布有大量金红石,几乎所有的金红石均分布于石榴石环内。导致这一奇特现象的主要原因为:矿石原岩为高钛基性侵入岩,其相对较浅的成岩深度使钛铁矿先结晶呈不规则团块状分布;变质成矿过程中,大量铁铝榴石的形成,促使钛铁矿分解,释放出的铁进入石榴石晶格,释放出的钛形成金红石。

RELATIONSHIP BETWEEN ANNULARITY OCCURRENCE AND MINERALIZATION OF GARNET FROM RUTILE DEPOSIT IN Dafu MOUNTAIN OF ZAOYANG CITY,HUBEI PROVINCE

Garnets mainly appear as multiformity annularity which have rutile,hornblende,chlorite and some little ilmenite inside the rings as well as the hornblende and chlorite between the ring and the intercrystalline minerals of garnet.Nearly all the garnet rings are distributed with a great deal of rutiles and are must be in them.The reasons to cause the strange phenomena is the initial rock,which is made of high-titanium basic intrusive rock.The lower tectono-corrected depth crystal the ilmenite and made it appe...