000			01743nam a2200229 4500
001			0000001469
008			110824s2010 a eng d
040			_aJMGHQ
090	0	0	_a551.880959522 _bAKA
100	0		_aAzalea Kamella Abdullah
245	1	0	_aGeneral geology, petrography and geochemistry of igneous intrussion in Pulau Salak, Kuching, Sarawak _cAzalea Kamella Abdullah .
260			_c2010
300			_avi, 70 p. _bcol. ill. _c30 cm
502			_aThesis (B.Sc.) Geology - Universiti Malaya, 2010
504			_aIncludes bibliographical references
520			_aBased on the observation and studies, the rocks in the study area can be divided into 3 distinct groups ; gabbro, diorite and hornfels. Gabbro and diorite are the ones that form the stock intrusion that results in the prominent hills at Pulau Salak. From the modal analysis, the rocks show high content of plagioclase (49.4% o 68.2%) and they all contain the essential minerals that consist o pyroxene, hornblends, biotite as well as the accessory amount of opqque oxides and quartz. The rocks also show evidence secondary minerals that form due to alteration ; sericite, saussurite and uralite (hornblende). The gabbro shows ophitic structure and the plagioclase mineral displays complex twinning as well as intense oscillatory and normal zoning. This suggest complex magmatic crystallization of the igneous rocks in the maging chamber. This also implies the rapid cooling of the intrusion during emplacement at the near surface.
650		0	_aGeology _zSarawak _zPulau Salak
650		0	_aPetrography _zSarawak _zPulau Salak
650		0	_aGeochmistry _zSarwak _zPulau Salak
650		0	_aDissertations, Academic _zMalaysia
651		0	_aPulau Salak (Kuching, Sarawak)
999			_c22187 _d22187