八庙—青山金红石矿床变质条件研究

RESEARCH ON THE METAMORPHIC CONDITIONS OF THE BAMIAO QINGSHAN RUTILE DEPOSIT

本矿床是我国金红石矿床重要的成因类型及工业类型，是高钛岩系在特定变质条件下形成的。本文用矿物温度压力计等方法，研究了矿床变质条件：变质温度，东部为４６７．２４～５０７．３１℃，平均４８７．２８℃，西部为５３１．５８～５６６．３３℃，平均５４９．００℃。变质压力，东部为１．８６×１０８～６．６３×１０８Ｐａ。平均２．２５×１０８Ｐａ；西部为０．６４×１０８～３．６９×１０８Ｐａ，平均２．１７×１０８Ｐａ。东部为还原环境，西部为氧化环境。对研究矿床成因及寻找新的同类矿床等有重要意义。

This deposit is an important genetic type and industrial type of rutile deposits in ourcountry, it was formed from high-titaniferous rock series under specified metamorphic conditions. The metamorphic conditions of the deposit have been studied using the mineral thermo-pressure meter and other ways. The metamorphic temperature is 467. 24￣ 507. 31℃,inthe east area of the deposit, the average is 487. 28℃; and 531. 58～566. 33℃ in the west areas, the average is 549. 00℃. The metamorphic pressure is 1. 86 × 108～6. 63 × 108 Pa in theeast area, the average is 2. 25 × 108 Pa. It is 0. 64 × 108～3. 69× 108Pa,in the west area, theaverage is 2. 17 × 108Pa, The east area of the deposit was lain under reduction environment,but the west area was lain under oxidized environment. The researched result has an important significance for to study the genesis of the deposit and look for new same type of deposit.