Research Article| June 01, 1982 Unidirectional solidification textures and their significance in determining relative ages of intrusions at the Henderson Mine, Colorado J. R. Shannon; J. R. Shannon 1Geology Department, Henderson Mine, Climax Molybdenum Company, Empire, Colorado 80438 Search for other works by this author on: GSW Google Scholar B. M. Walker; B. M. Walker 1Geology Department, Henderson Mine, Climax Molybdenum Company, Empire, Colorado 80438 Search for other works by this author on: GSW Google Scholar R. B. Carten; R. B. Carten 1Geology Department, Henderson Mine, Climax Molybdenum Company, Empire, Colorado 80438 Search for other works by this author on: GSW Google Scholar E. P. Geraghty E. P. Geraghty 1Geology Department, Henderson Mine, Climax Molybdenum Company, Empire, Colorado 80438 Search for other works by this author on: GSW Google Scholar Geology (1982) 10 (6): 293–297. https://doi.org/10.1130/0091-7613(1982)10<293:USTATS>2.0.CO;2 Article history first online: 01 Jun 2017 Cite View This Citation Add to Citation Manager Share Icon Share Facebook Twitter LinkedIn MailTo Tools Icon Tools Get Permissions Search Site Citation J. R. Shannon, B. M. Walker, R. B. Carten, E. P. Geraghty; Unidirectional solidification textures and their significance in determining relative ages of intrusions at the Henderson Mine, Colorado. Geology 1982;; 10 (6): 293–297. doi: https://doi.org/10.1130/0091-7613(1982)10<293:USTATS>2.0.CO;2 Download citation file: Ris (Zotero) Refmanager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex toolbar search Search Dropdown Menu toolbar search search input Search input auto suggest filter your search All ContentBy SocietyGeology Search Advanced Search Abstract A variety of igneous textures displayed by stocks associated with the Henderson molybdenite deposit are interpreted to result from unidirectional growth from the walls of magma chambers inward. These igneous textures are present in layers and multilayered sequences consisting of crenulate quartz and feldspar pegmatites, crenulate quartz, dendritic alkali feldspar and quartz, and dendritic and micrographic alkali feldspar–quartz intergrowths. Minerals or intergrowths defining a layer within any one stock consistently terminate or branch inward, away from the stock contacts. The layers are separated by aplite or aplite porphyry and are most common in the apical and marginal parts of an individual stock. Layering generally parallels intrusive contacts.Differences in morphologies of phases among the various layers suggest changing conditions of growth from an undercooled melt and/or aqueous solution. Changes in these physical and chemical conditions as the stock crystallized inward produced the observed textural and compositional layering.Unidirectional solidification textures can be used to determine the relative ages of individual stocks as well as the approximate orientation of stock contacts. In the absence of other independent evidence, unidirectional textures can also be used to indicate proximity to an intrusive contact. These features are an invaluable aid in detailed mapping of multiple-intrusion systems in which the units are compositionally identical or nearly identical. This content is PDF only. Please click on the PDF icon to access. First Page Preview Close Modal You do not have access to this content, please speak to your institutional administrator if you feel you should have access.