|
Article |
British Geological Survey, Keyworth, Nottingham NG 12 5GG
1 Geological Survey of Malaysia, PO Box 1015, Ipoh, Perak, Malayasia
Four granite provinces have been delineated each with its own distinctive pattern of mineralization.
1. The Main Range Province. Endogenous greisen-bordered vein swarms of cassiterite and wolframite.
2. The Eastern Province. Magnetite–cassiterite skarns ± base metal sulphides with antimony in Thailand.
3. The Western (Peninsular Thailand–Burma) Province. Endogenous greisen-bordered vein swarms and pegmatites of cassiterite and wolframite.
4. The North Thailand Migmatitic Province. Endogenous vein and skarn replacement scheelite and fluorite deposits with some tin and local antimony.
In all provinces, but particularly in the Main Range, granitoids designated as two-phase variants have been recognized where xenocrysts and xenoliths of coarse, primary texture granite are enclosed in, and corroded by an invasive, equigranular quartzo–feldspathic matrix. These rocks form an essential part of the granite sequence in all provinces and have probably resulted from the infiltration and disruption of the host granite by late stage magmatic fluids.
Whole rock geochemistry from Peninsular Malaysia shows that the granites from the Main Range and Eastern Provinces comprise two contrasted suites which correspond approximately to the I and S-type categories advocated by Chappell & White (1974). In addition it is shown that individual plutons within batholiths in the two provinces have distinctive geochemical parameters. Variation diagrams of plutons having the intrusive sequence primary texture granite—two-phase granite—microgranite show linear trends with increasing SiO2, Na2O, Rb, W, Sn and U, and decreasing Sr, Ba, Th and all other major elements.
This article has been cited by other articles:
 |
|
 |
|
  C. K. Morley Evolution from an oblique subduction back-arc mobile belt to a highly oblique collisional margin: the Cenozoic tectonic development of Thailand and eastern Myanmar Geological Society, London, Special Publications, 2009; 318: 373 - 403. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 H. R. Smyth, R. Hall, and G. J. Nichols Cenozoic volcanic arc history of East Java, Indonesia: The stratigraphic record of eruptions on an active continental margin Geological Society of America Special Papers, 2008; 436: 199 - 222. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 S. M. Barr, A. S. Macdonald, P. Ounchanum, and M. A. Hamilton Age, tectonic setting and regional implications of the Chiang Khong volcanic suite, northern Thailand Journal of the Geological Society, 2006; 163: 1037 - 1046. [Abstract] [Full Text] [PDF]
|
|
|
|
 |
|
 References Geological Society, London, Memoirs, 2005; 31: 267 - 282. [PDF]
|
|
|
|
|
|
C. K. Morley and C.K. Morley Nested strike-slip duplexes, and other evidence for Late Cretaceous-Palaeogene transpressional tectonics before and during India-Eurasia collision, in Thailand, Myanmar and Malaysia Journal of the Geological Society, 2004; 161: 799 - 812. [Abstract] [Full Text] [PDF]
|
|
|
|
|
|
B. Richter and M. Fuller Palaeomagnetism of the Sibumasu and Indochina blocks: implications for the extrusion tectonic model Geological Society, London, Special Publications, 1996; 106: 203 - 224. [Abstract] [PDF]
|
|
|
|
|
|
N. A. HARBURY, M. E. JONES, M. G. AUDLEY-CHARLES, I. METCALFE, and K. R. MOHAMED Structural evolution of Mesozoic Peninsular Malaysia Journal of the Geological Society, 1990; 147: 11 - 26. [Abstract] [PDF]
|
|
|
|
|
|
Discussion on the granites of the southeast Asian tin belt Journal of the Geological Society, 1987; 144: 841 - 842. [Abstract] [PDF]
|
|
