| dc.creator |
Boniface, Nelson |
|
| dc.date |
2016-04-22T10:19:57Z |
|
| dc.date |
2016-04-22T10:19:57Z |
|
| dc.date |
2011 |
|
| dc.date.accessioned |
2018-03-27T08:56:54Z |
|
| dc.date.available |
2018-03-27T08:56:54Z |
|
| dc.identifier |
Boniface, N., 2011. Contact metamorphism in the supracrustal rocks of the Sukumaland Greenstone Belt in the North West Tanzania. Tanzania Journal of Science, 37(1). |
|
| dc.identifier |
0856 1761 |
|
| dc.identifier |
http://hdl.handle.net/123456789/1617 |
|
| dc.identifier.uri |
http://hdl.handle.net/123456789/4007 |
|
| dc.description |
Biotite-granite intrusions in meta-ironstones at Geita Hills and the Bukoli alkali-granite intrusion in metabasites at Mawemeru area produced heat that baked the respective country rocks through epidote-amphibolite- to amphibolite-facies. Critical and informative mineral assemblages in the metairostones of Geita Hills are garnet-grunerite-epidote-quartz and garnetferrogedrite- biotite-quartz and in the metabasites of Mawemeru is ferrotschermakite-(Naplagioclase)- quartz. Peak temperatures ranging between 438°C and 544°C were calculated from the above mineral assemblages and a pressure not exceeding 3 kbar was inferred to from the composition of magnesium-iron amphiboles (grunerite with XFe ratio of 0.83, i.e. Gru83). Hornfels textures in the metaironstones are suggested by euhedral poikiloblastic garnet and quartz with grain boundaries intersecting at approximately 120° (granoblastic polygonal texture) and biotite aggregates forming an interlocking network of elongate grains aligned in all directions and bounded by rational crystal faces (decussate texture). |
|
| dc.language |
en |
|
| dc.subject |
Contact metamorphism |
|
| dc.subject |
intrusions |
|
| dc.subject |
Sukumaland Greenstonebelt |
|
| dc.subject |
Neoarchaean |
|
| dc.title |
Contact Metamorphism in the Supracrustal Rocks of the Sukumaland Greenstone Belt in the North West Tanzania |
|
| dc.type |
Journal Article, Peer Reviewed |
|