Occurrence of Ca-Fe silicate minerals with zeolites in basalt cavities at Bombay, India
Occurrence of Ca-Fe silicate minerals with zeolites in basalt cavities at Bombay, India
复制标题
印度孟买玄武岩洞中钙铁硅酸盐矿物与沸石的赋存
DOI：
10.1127/ejm/2/6/0875
复制
发表时间：
1990
影响因子：
2.1
通讯作者：
William P. Moller
中科院分区：
文献类型：
--
作者：
W. Wise;William P. Moller
在印度孟买附近的Khondivilli采石场暴露的蚀变玄武岩的空洞中，含有前白云石、绿泥石、泥沸石、石英和方解石，并与几种钙铁硅酸盐矿物中的至少一种有关：juloite -(Fe2+)、ilvaite、babingtonite或hydroandradite。这些矿物的组成都接近于铁端元组成。由于围岩已被绿泥石和少量黄铁矿所取代，因此空腔流体必须具有更高的氧逸度，以便使各种硅酸铁矿物结晶。流体包裹体研究和深度估计表明，地层的温度和压力约为200摄氏度和500巴。
Cavities in altered basalts, exposed by the Khondivilli Quarry near Bombay, India, contain prehnite, chlorite, laumontite, quartz, and calcite, associated with at least on of several Ca-Fe silicate minerals: julgodite-(Fe2+), ilvaite, babingtonite, or hydroandradite. The composition of each of these minerals is near the ferric iron end member composition. Because the surrounding rock has been replaced by chlorite with minor pyrite, cavity fluids must have developed substantially higher oxygen fugacities, in order to crystallize the various iron silicate minerals. Fluid inclusion studies and depth estimates indicate that the temperature and pressure of formation was about 200 C and 500 bars.