Emplacement of quartz-feldspar veins in the Noosa Quartz Diorite pluton, Queensland

Kretz, Ralph Emplacement of quartz-feldspar veins in the Noosa Quartz Diorite pluton, Queensland. Brisbane: University of Queensland Press, 1966.

Attached Files (Some files may be inaccessible until you login with your UQ eSpace credentials)
Name Description MIMEType Size Downloads
Read with bookreader  Dept_Geology_Papers_VI_2.pdf Full text application/pdf 3.10MB 158
Author Kretz, Ralph
Title Emplacement of quartz-feldspar veins in the Noosa Quartz Diorite pluton, Queensland
Place of Publication Brisbane
Publisher University of Queensland Press
Publication year 1966
Sub-type Other
Open Access Status File (Publisher version)
Volume 6
Series Papers (University of Queensland. Dept. of Geology) ; v. VI no. 2.
Language eng
Start page 55
End page 73
Total number of pages 23
Subjects 260100 Geology
Formatted Abstract/Summary

The Noosa Quartz Diorite pluton, emplaced in Mesozoic sandstone, is composed of plagioclase, hornblende, quartz, and other minor minerals. It contains at least three types of quartz-feldspar veins:

1.   Narrow quartz-plagioclase veins, less than ½ cm thick, containing slightly more quartz and less biotite and chlorite than the enclosing rock.

2.   Aplite veins, a few centimetres thick, composed of potassic feldspar, sodic feldspar, and quartz.

3.   Composite veins, a few centimetres or tens of centimetres thick, normally composed of a central granitic vein rock which contains more quartz than the enclosing quartz diorite, and a marginal vein rock composed mainly of potassic feldspar and quartz. A transitional vein rock, whose composition is intermediate to that of the granitic and marginal vein rocks may also be present. Some of the composite veins, when traced along strike, grade into the enclosing quartz diorite.

Mechanisms of vein emplacement are considered and discussed. It is suggested that some vein rocks have crystallized from a silicate melt which moved to the site of vein formation by fluid flow, while other vein rocks have crystallized from a dispersed phase which moved to the site of vein formation by diffusion through solid quartz diorite.

Keyword Quartz -- Queensland
Feldspar -- Queensland
Veins (Geology) -- Queensland
Geology -- Queensland -- Noosa Region
Q-Index Code AX
Q-Index Status Provisional Code

 
Citation counts: Google Scholar Search Google Scholar
Created: Mon, 17 Jun 2013, 08:47:44 EST by Ning Jing on behalf of Scholarly Communication and Digitisation Service