Editing Granitic vein complexes, Younger Caledonian igneous rocks, Northern Highlands of Scotland

Jump to navigation Jump to search

Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.

The edit can be undone. Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.

This page supports semantic in-text annotations (e.g. "[[Is specified as::World Heritage Site]]") to build structured and queryable content provided by Semantic MediaWiki. For a comprehensive description on how to use annotations or the #ask parser function, please have a look at the getting started, in-text annotation, or inline queries help pages.

Latest revision Your text
Line 1: Line 1:
 
{{NHRG}}
 
{{NHRG}}
 
== Granitic vein complexes, introduction ==
 
== Granitic vein complexes, introduction ==
[[File:P915483.jpg|400px|thumbnail|The vein complexes of the south-west part of the Northern Highlands. P915483.]]
+
[[File:P915483.jpg|300px|thumbnail|The vein complexes of the south-west part of the Northern Highlands. P915483.]]
 
Vein complexes or stockworks have been described in connection with the ‘Regional Pegmatites’ developed within the area of the migmatite complexes (pp.90–91). All of these are pegmatitic trondhjemite veins which were clearly derived from the migmatites which they traverse, although some of the later veins cut across the migmatite banding and the foliation of the host rock. In the southwest part of the Northern Highlands, mainly south of Glen Moriston and entirely within the Loch Eil Division, innumerable veins and sheets are found; these range from quartz diorite to leucogranite in composition, and from granitic to aplitic and pegmatitic in texture. They are clearly not directly related to the rocks which they cut, and appear to have been intruded from a remote magmatic source. Although widespread throughout the Northern Highlands (north of Glen Moriston their occurrence is not recorded in detail) there are areas where they form up to 30% or more of the total rock (Fettes and MacDonald, 1978) and the amount of igneous material they represent is enormous. The outer limits of these vein complexes are difficult to define and the mapped boundaries are highly subjective. The complexes so far delimited are shown on [[Media:P915483.jpg|P915483]], and described below.
 
Vein complexes or stockworks have been described in connection with the ‘Regional Pegmatites’ developed within the area of the migmatite complexes (pp.90–91). All of these are pegmatitic trondhjemite veins which were clearly derived from the migmatites which they traverse, although some of the later veins cut across the migmatite banding and the foliation of the host rock. In the southwest part of the Northern Highlands, mainly south of Glen Moriston and entirely within the Loch Eil Division, innumerable veins and sheets are found; these range from quartz diorite to leucogranite in composition, and from granitic to aplitic and pegmatitic in texture. They are clearly not directly related to the rocks which they cut, and appear to have been intruded from a remote magmatic source. Although widespread throughout the Northern Highlands (north of Glen Moriston their occurrence is not recorded in detail) there are areas where they form up to 30% or more of the total rock (Fettes and MacDonald, 1978) and the amount of igneous material they represent is enormous. The outer limits of these vein complexes are difficult to define and the mapped boundaries are highly subjective. The complexes so far delimited are shown on [[Media:P915483.jpg|P915483]], and described below.
  

Please note that all contributions to Earthwise may be edited, altered, or removed by other contributors. If you do not want your writing to be edited mercilessly, then do not submit it here.
You are also promising us that you wrote this yourself, or copied it from a public domain or similar free resource (see Earthwise:Copyrights for details). Do not submit copyrighted work without permission!

Cancel Editing help (opens in new window)

  [] · [[]] · [[|]] · {{}} · · “” ‘’ «» ‹› „“ ‚‘ · ~ | °   · ± × ÷ ² ³ ½ · §
[[Category:]] · [[:File:]] · <code></code> · <syntaxhighlight></syntaxhighlight> · <includeonly></includeonly> · <noinclude></noinclude> · #REDIRECT[[]] · <translate></translate> · <languages/> · ==References== · {{reflist}} · ==Footnote== · {{reflist|group=note}} · <ref group=note> · __notoc__ · {{DEFAULTSORT:}} <div class="someclass noprint"></div> {{clear}} <br>

Template used on this page: