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马尼托巴省弗林弗伦—斯诺湖绿岩带的三个块状硫化物矿床附近的变质作用,其压力和温度的估计值,已用镁铁质和长英质变质火山岩的矿物共生组合获得。在该带西部,森特尼尔矿床周围的弗林弗伦地区受到了低级绿片岩相变质作用。在该带中部的斯普鲁斯矿床附近,估计变质条件为上绿片岩相,变质的温度和压力分别为475±75℃和2.6±1.2kbar。在安德森湖矿床附近,斯诺湖以西地区,变质作用达到了夕线石级。在十字石-夕线石带,变质的温、压条件为580±25℃和5.25±0.75kbar;在黑云母-夕线石-铁铝榴石带,在最高压力为6.2kbar情况下,温度为620±25℃。斯诺湖地区的温度和压力的估计值表明,低压下的十字石和石英的稳定上限的实验研究所指示的温度,都比野外矿物共生组合所指示的温度高很多。
The metamorphism near the three massive sulphide deposits in the Flin Fremont-Snow Lake Greenstone Belt of Manitoba, whose pressure and temperature estimates have been metamorphosed with mafic and metamorphic metamorphic volcanic minerals Combinations. In the west of the area, the Flinflor area around the Centenary deposit is affected by low-grade greenschist facies metamorphism. Near the middle of the belt the Spruce deposit is estimated to have metamorphic conditions of upper greenschist facies with metamorphic temperatures and pressures of 475 ± 75 ° C and 2.6 ± 1.2 kbar, respectively. Near the Anderson Lake deposit, west of the Snow Lake, metamorphism reaches the level of sillimanite. In the Paleolithic - stilt belt, metamorphic temperature and pressure conditions were 580 ± 25 ℃ and 5.25 ± 0.75kbar; in the biotite-sillimanite zone, at a maximum pressure of 6.2kbar, the temperature 620 ± 25 ° C. Estimates of temperature and pressure in the Snow Lake region indicate that the experimental temperatures indicated by the experimental studies of the stability upper bound of dolomite and quartz at low pressures are all significantly higher than the temperatures indicated by the field mineral assemblages.