| dc.creator |
Mruma, Abdulkarim H. |
|
| dc.creator |
Basu, N. K. |
|
| dc.date |
2016-09-21T13:52:28Z |
|
| dc.date |
2016-09-21T13:52:28Z |
|
| dc.date |
2003 |
|
| dc.date.accessioned |
2018-03-27T08:58:02Z |
|
| dc.date.available |
2018-03-27T08:58:02Z |
|
| dc.identifier |
Mruma, A.H. and Basu, N.K., 1987. Petrology of the talc-kyanite-yoderite-quartz schist and associated rocks of Mautia Hill, Mpwapwa District, Tanzania. Journal of African Earth Sciences (1983), 6(3), pp.301-311. |
|
| dc.identifier |
http://hdl.handle.net/20.500.11810/3989 |
|
| dc.identifier |
10.1016/0899-5362(87)90073-X |
|
| dc.identifier.uri |
http://hdl.handle.net/20.500.11810/3989 |
|
| dc.description |
Full text can be accessed at
http://www.sciencedirect.com/science/article/pii/089953628790073X |
|
| dc.description |
alc-kyanite-yoderite-quartz schist and associated rocks belonging to the Proterozoic Usagaran System occurring along the western edge of the Mozambique Orogenic Belt (450–600 Ma) were studied using petrographic, X-ray diffraction, electron-microprobe and fluid inclusion methods. The main rock types studied in the area include talc-kyanite-yoderite-quartz schist, piemontite quartzite, epidote-phogopite quartzite, kyanite-quartz-biotite schist and biotite gneiss.
Fluid inclusion studies on the selected rock types indicate the presence of usually two-phased H2O-rich and CO2-rich fluids with a range of filling from 0.6 to 0.95. Some CO2-rich fluids may be one-phased (liquid) at room temperature with their degree of filling ranging from 0.4 to 1.0. Most of the CO2-rich inclusions show negative crystal shapes.
Fluid inclusions trapped in kyanite in the talc-kyanite-yoderite-quartz schist with isolated negative crystal shapes are considered primary. The presence of CO2-rich fluids indicates low water fugacity during the formation of the talc-kyanite assemblage, and so pressure was probably lower. Primary fluid inclusions could be trapped at pressures between 5.2 and 5.6 kb and temperatures ranging from 540 to 570°C; this gives the possible P-T range of the peak of the first phase of progressive metamorphism. |
|
| dc.language |
en |
|
| dc.title |
Petrology of the Talc-Kyanite-Yoderite-Quartz Sschist and Asociated Rocks of Mautia Hill, Mpwapwa District, Tanzania |
|
| dc.type |
Journal Article |
|