Matches in SemOpenAlex for { <https://semopenalex.org/work/W1998771118> ?p ?o ?g. }
- W1998771118 endingPage "1401" @default.
- W1998771118 startingPage "1383" @default.
- W1998771118 abstract "Research Article| August 01, 2014 Petrologic Evolution of a Nipigon Diabase Sill, Ontario, Canada: Insights From Compositional and Textural Profiles* Michael J. Zieg Michael J. Zieg † Department of Geography, Geology, and the Environment, Slippery Rock University, Slippery Rock, Pennsylvania 16057 †E-mail, michael.zieg@sru.edu Search for other works by this author on: GSW Google Scholar Economic Geology (2014) 109 (5): 1383–1401. https://doi.org/10.2113/econgeo.109.5.1383 Article history received: 30 Apr 2012 accepted: 12 Aug 2013 first online: 09 Mar 2017 Cite View This Citation Add to Citation Manager Share Icon Share MailTo Twitter LinkedIn Tools Icon Tools Get Permissions Search Site Citation Michael J. Zieg; Petrologic Evolution of a Nipigon Diabase Sill, Ontario, Canada: Insights From Compositional and Textural Profiles. Economic Geology 2014;; 109 (5): 1383–1401. doi: https://doi.org/10.2113/econgeo.109.5.1383 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 SocietyEconomic Geology Search Advanced Search Abstract Petrographic and geochemical profiles collected through a ~250-m-thick Nipigon diabase sill near Black Sturgeon Lake, Ontario, constrain the complex emplacement and differentiation processes that controlled the magmatic evolution of these rocks: several nested reinjections of phenocryst-bearing magma, compactiondriven redistribution of mildly evolved interstitial liquids in the central portion of the sill, and segregation of highly-evolved interstitial liquids into micropegmatitic veins near the upper contact. These processes impact not only the silicate mineralogy of the rocks, but also distribution of sulfide phases.Both petrographic and geochemical data demonstrate that the sill was gradually inflated via several discrete injections of olivine-bearing magma. Plagioclase crystal size trends exhibit several reversals that are correlated with increases in olivine abundance and bulk-rock MgO content. These textural and compositional reversals are attributed to reinjections of olivine-bearing magma into partially solidified magma from earlier injections. Mixing between evolved resident magma and reinjections of less-evolved magma is commonly proposed as a mechanism for triggering sulfide mineralization. In this sill, which contains no significant mineralization, localized minor enrichments and depletions in copper content are associated with the margins of a well-constrained reinjection horizon.Chemical differentiation of the magma was controlled by three distinct processes: flow differentiation, crystal-mush compaction, and solidification front instability. Although the mineralogy of the sill is dominated by plagioclase and clinopyroxene, major-oxide compositional variations are largely controlled by the mechanical concentration of olivine via flow differentiation or phenocryst redistribution within the individual reinjection pulses. This redistribution of phenocryst phases is the primary factor controlling the major-element composition of the rocks in most of the sill. In the central portion of the sill, the abundances of incompatible trace elements are influenced by the compaction of partially crystalline mush and the expulsion of incompatible-rich interstitial liquid. This is recognized by a negative correlation between the alignment of plagioclase crystals and concentrations of incompatible trace elements such as Zr. Finally, there is a ~2.5-m-thick silicic segregation approximately 32 m below the upper contact, whose composition is consistent with residual liquid after ~65 to 85% fractional crystallization of magma with a composition equivalent to that of the marginal rocks. Similar veins and patches are common throughout the upper 50 m of the sill, indicating that this segregation process was common and widespread during the cooling and crystallization of the sill.The complexity of intrusion and differentiation in this sill, despite its generally unremarkable texture and composition, suggests that many diabase sills may have experienced a range of processes that have previously been recognized to impact the petrologic evolution of larger igneous systems, and that these processes can be identified in minor intrusions such as sills and dikes using simple and robust analytical techniques. You do not have access to this content, please speak to your institutional administrator if you feel you should have access." @default.
- W1998771118 created "2016-06-24" @default.
- W1998771118 creator A5055395080 @default.
- W1998771118 date "2014-05-15" @default.
- W1998771118 modified "2023-10-18" @default.
- W1998771118 title "Petrologic Evolution of a Nipigon Diabase Sill, Ontario, Canada: Insights From Compositional and Textural Profiles" @default.
- W1998771118 cites W1970657823 @default.
- W1998771118 cites W1979105698 @default.
- W1998771118 cites W1981132037 @default.
- W1998771118 cites W1985705105 @default.
- W1998771118 cites W1988262359 @default.
- W1998771118 cites W1991024294 @default.
- W1998771118 cites W1997691803 @default.
- W1998771118 cites W1998990125 @default.
- W1998771118 cites W1999567490 @default.
- W1998771118 cites W2000369681 @default.
- W1998771118 cites W2005947638 @default.
- W1998771118 cites W2006510273 @default.
- W1998771118 cites W2006576433 @default.
- W1998771118 cites W2009794756 @default.
- W1998771118 cites W2011633803 @default.
- W1998771118 cites W2012627882 @default.
- W1998771118 cites W2012987873 @default.
- W1998771118 cites W2016154516 @default.
- W1998771118 cites W2020012873 @default.
- W1998771118 cites W2022787715 @default.
- W1998771118 cites W2026129298 @default.
- W1998771118 cites W2042692134 @default.
- W1998771118 cites W2047330035 @default.
- W1998771118 cites W2047890257 @default.
- W1998771118 cites W2056538068 @default.
- W1998771118 cites W2057884798 @default.
- W1998771118 cites W2060930762 @default.
- W1998771118 cites W2062628874 @default.
- W1998771118 cites W2065074144 @default.
- W1998771118 cites W2065326157 @default.
- W1998771118 cites W2065568183 @default.
- W1998771118 cites W2067788035 @default.
- W1998771118 cites W2070935507 @default.
- W1998771118 cites W2071397916 @default.
- W1998771118 cites W2072096843 @default.
- W1998771118 cites W2076153667 @default.
- W1998771118 cites W2077325905 @default.
- W1998771118 cites W2085987682 @default.
- W1998771118 cites W2086703806 @default.
- W1998771118 cites W2086881624 @default.
- W1998771118 cites W2087319249 @default.
- W1998771118 cites W2089716826 @default.
- W1998771118 cites W2092351022 @default.
- W1998771118 cites W2094277902 @default.
- W1998771118 cites W2105821699 @default.
- W1998771118 cites W2107210433 @default.
- W1998771118 cites W2107634535 @default.
- W1998771118 cites W2110305696 @default.
- W1998771118 cites W2116673349 @default.
- W1998771118 cites W2129455118 @default.
- W1998771118 cites W2131506862 @default.
- W1998771118 cites W2134099313 @default.
- W1998771118 cites W2138947960 @default.
- W1998771118 cites W2140621717 @default.
- W1998771118 cites W2146252397 @default.
- W1998771118 cites W2146904998 @default.
- W1998771118 cites W2149554645 @default.
- W1998771118 cites W2153024854 @default.
- W1998771118 cites W2160073758 @default.
- W1998771118 cites W2160346717 @default.
- W1998771118 cites W2161484974 @default.
- W1998771118 cites W2163555075 @default.
- W1998771118 cites W2164223931 @default.
- W1998771118 cites W2182217848 @default.
- W1998771118 cites W2186266750 @default.
- W1998771118 cites W2308584142 @default.
- W1998771118 cites W2315818844 @default.
- W1998771118 cites W2325529809 @default.
- W1998771118 cites W2798110564 @default.
- W1998771118 doi "https://doi.org/10.2113/econgeo.109.5.1383" @default.
- W1998771118 hasPublicationYear "2014" @default.
- W1998771118 type Work @default.
- W1998771118 sameAs 1998771118 @default.
- W1998771118 citedByCount "6" @default.
- W1998771118 countsByYear W19987711182017 @default.
- W1998771118 countsByYear W19987711182018 @default.
- W1998771118 countsByYear W19987711182019 @default.
- W1998771118 countsByYear W19987711182021 @default.
- W1998771118 countsByYear W19987711182022 @default.
- W1998771118 crossrefType "journal-article" @default.
- W1998771118 hasAuthorship W1998771118A5055395080 @default.
- W1998771118 hasConcept C120806208 @default.
- W1998771118 hasConcept C127313418 @default.
- W1998771118 hasConcept C17409809 @default.
- W1998771118 hasConcept C182402614 @default.
- W1998771118 hasConcept C183222429 @default.
- W1998771118 hasConcept C192241223 @default.
- W1998771118 hasConcept C199360897 @default.
- W1998771118 hasConcept C2778447006 @default.
- W1998771118 hasConcept C40201923 @default.
- W1998771118 hasConcept C41008148 @default.
- W1998771118 hasConcept C59235061 @default.