Metasomatic Textures in Granites: Evidence from Petrographic by Jiashu Rong, Fenggang Wang

By Jiashu Rong, Fenggang Wang

Based on countless numbers of skinny sections from granite in China, this booklet introduces metasomatic textures and their formation mechanism in granite. It additionally proposes that metasomatic textures can essentially be categorized into styles: hetero-oriented substitute and co-oriented substitute, in keeping with the consistency of orientations of replacive and changed minerals. The hetero-oriented albitization of K-feldspar is kind of distinctive from the co-oriented albitization of K-feldspar. They happen individually with out transition, even if either are often known as albitization of K-feldspar.
This special granite atlas makes use of a chain of colour microphotos fascinated by a quartz plate less than crossed polars to obviously illustrate metasomatic mechanisms and superimposed metasomatic techniques. The origins of transparent albite rim, intergranular swapped albite, K-feldspathization, quartzification, muscovitization, beryllization, myrmekite, small platy albite, perthitic albite, K-feldspar megacryst and so forth. are comprehensively mentioned and defined. The booklet will entice lecturers, researchers and scholars excited about igneous and metamorphic petrology.

Show description

Read or Download Metasomatic Textures in Granites: Evidence from Petrographic Observation (Springer Mineralogy) PDF

Similar mineralogy books

Röntgen-Pulverdiffraktometrie: Rechnergestützte Auswertung, Phasenanalyse und Strukturbestimmung (German Edition)

Die Beugung von Röntgenstrahlen wird heute in vielen Labors zur schnellen, sicheren und zerstörungsfreien Identifikation von Festkörperproben benutzt. Der Einsatz von Kleinrechnern (PCs) und von schnelleren Detektoren hat in der Röntgenpulverdiffraktometrie zu einer Renaissance sowohl in der Phasenanalyse von Gemischen als auch in der Strukturverfeinerung aus Pulverdaten geführt.

Chemical Elements in the Environment: Factsheets for the Geochemist and Environmental Scientist

How huge is the average edition in focus of some of the parts in numerous media? How do the oft-cited "World common concentrations" in several media examine with real analytical info? How low a detection restrict do i have to reach if i would like to examine for a component in soils, sediments, water or crops?

Isotopic Landscapes in Bioarchaeology

This paintings takes a severe examine the present thought of isotopic landscapes ("isoscapes") in bioarchaeology and its program in destiny study. It in particular addresses the examine capability of cremated unearths, a just a little ignored bioarchaeological substrate, ensuing basically from the inherent osteological demanding situations and complicated mineralogy linked to it.

Additional resources for Metasomatic Textures in Granites: Evidence from Petrographic Observation (Springer Mineralogy)

Example text

Intense swapped K-feldspathization K1′K2′ between two primary K-feldspars K1K2. Neither relics of perthitic albite nor vermicular albite are contained in the primary K-feldspars K1K2. Huangnitian quartz syenite Fig. 26 (+)Q. Relicts of K1K2 are enclosed in swapped K1′K2′ which have no clear myrmekitic Ab. Huangnitian quartz syenite observed at grain boundaries between two differently oriented primary K-feldspar crystals (K1, K2) (Figs. 29) as swapped rows of albite occur at contacts between two K-feldspars.

75 BSE-images. Irregular sharp boundary between K and K(Ab). K(Ab) contains more micropores and hematite Hm particles than in K. Jiling granite The senior author studied the optic indicatrix of two individual crystals of co-oriented chessboard albite twins by universal stage on the Wulff-net (Fig. 79). The result shows that the three planes connecting the homonymous axes (Np1Np2, Nm1Nm2, and Ng1Ng2) of optic indicatrix of two individual co-oriented chessboard albite intersect a narrow triangle column which is approximately close to axis b of the crystal.

26 (+)Q. Relicts of K1K2 are enclosed in swapped K1′K2′ which have no clear myrmekitic Ab. Huangnitian quartz syenite observed at grain boundaries between two differently oriented primary K-feldspar crystals (K1, K2) (Figs. 29) as swapped rows of albite occur at contacts between two K-feldspars. The replacive K-feldspar (K1′) with the same orientation of K1 on which the K1′ nucleated replaces the differently oriented K-feldspar (K2), whereas the replacive K-feldspar (K2′) with the same orientation as K2 on which the K2′ is attached replaces the differently oriented K1.

Download PDF sample

Rated 4.68 of 5 – based on 43 votes