A revised CIPW norm

dc.contributor.author	Verma, SP
dc.contributor.author	Torres-Alvarado, IS
dc.contributor.author	Velasco-Tapia, F
dc.date.accessioned	2011-01-22T10:27:17Z
dc.date.available	2011-01-22T10:27:17Z
dc.date.issued	2003
dc.identifier.issn	0036-7699
dc.identifier.uri	http://hdl.handle.net/11154/1553
dc.description.abstract	The CIPW norm proposed one hundred years ago is still a useful scheme because abundances of normative minerals are required for a proper rock classification such as that recommended by the IUGS. However, a standard methodology for CIPW norm computation is required. This paper presents a detailed step-by-step procedure for a Standard Igneous Norm (SIN). Our proposal is based on mass-balance principles involving the concept of variable molecular weights, free or unused parameters such as oxygen, CO2 and other oxides, and silica deficiency. This SIN is capable of providing highly consistent results, with differences between CIPW norm sums and bulk chemical analyses generally smaller than 0.002.	en_US
dc.language.iso	en	en_US
dc.title	A revised CIPW norm	en_US
dc.type	Article	en_US
dc.identifier.idprometeo	1723
dc.source.novolpages	83(2):197-216
dc.subject.wos	Geology
dc.subject.wos	Mineralogy
dc.description.index	WoS: SCI, SSCI o AHCI
dc.subject.keywords	CIPW norm
dc.subject.keywords	geochemistry
dc.subject.keywords	igneous rocks
dc.subject.keywords	rock classification
dc.subject.keywords	mass-balance
dc.relation.journal	Schweizerische Mineralogische Und Petrographische Mitteilungen