Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic Time
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Dickin, A. P., Henderson, C. M. B., Gibb, F. G. F. (1984) Hydrothermal Sr contamination of the Dippin sill, Isle of Arran, Western Scotland. Mineralogical Magazine, 48 (348) 311-322 doi:10.1180/minmag.1984.048.348.02

Advanced
   -   Only viewable:
Reference TypeJournal (article/letter/editorial)
TitleHydrothermal Sr contamination of the Dippin sill, Isle of Arran, Western Scotland
JournalMineralogical MagazineISSN0026-461X
AuthorsDickin, A. P.Author
Henderson, C. M. B.Author
Gibb, F. G. F.Author
Year1984 (September)Volume48
Issue348
PublisherMineralogical Society
Download URLhttps://rruff.info/doclib/MinMag/Volume_48/48-348-311.pdf+
DOIdoi:10.1180/minmag.1984.048.348.02Search in ResearchGate
Generate Citation Formats
Mindat Ref. ID3638Long-form Identifiermindat:1:5:3638:6
GUID0
Full ReferenceDickin, A. P., Henderson, C. M. B., Gibb, F. G. F. (1984) Hydrothermal Sr contamination of the Dippin sill, Isle of Arran, Western Scotland. Mineralogical Magazine, 48 (348) 311-322 doi:10.1180/minmag.1984.048.348.02
Plain TextDickin, A. P., Henderson, C. M. B., Gibb, F. G. F. (1984) Hydrothermal Sr contamination of the Dippin sill, Isle of Arran, Western Scotland. Mineralogical Magazine, 48 (348) 311-322 doi:10.1180/minmag.1984.048.348.02
In(1984, September) Mineralogical Magazine Vol. 48 (348) Mineralogical Society
Abstract/NotesAbstract
The Dippin sill, which is emplaced into the Triassic sediments of SE Arran, is an alkaline basic sheet which displays pronounced hydrothermal alteration. The 40-m-thick sill has suffered pervasive contamination with radiogenic Sr, introduced from the Triassic sediments by hydrothermal fluids. Stable isotope measurements suggest that fluids were of meteoric origin, but were restricted to a small closed-system circulation. Initial 87Sr/86Sr ratios in the sill were raised from an original value of 0.7032 to a maximum of 0.7091, contamination being especially pronounced near the contacts at Dippin Head itself (localities 12 and 14) and in a drill core section through the sill above Dippin. Hydrothermal Sr was incorporated into an early-formed high-CaO, high-Sr analcime, which replaced unstable high-silica nepheline in interstitial patches. However, this high-CaO analcime, along with plagioclase, was later replaced by a low-CaO, low-Sr analcime, allowing Sr leaching from the margins of the sill. Hydrothermal fluids are thought to have migrated up to 1 km laterally, up the dip of the sill, mainly via tension joints forming in the cooling intrusion. Pooling of hot fluids at the upper end of the sill probably raised water/rock ratios in this region and allowed greater Sr contamination during mineralogical alteration. The undersaturated mineralogy of the sill accounts for its pervasive hydrothermal Sr contamination, which contrasts markedly with the relatively undisturbed Sr isotope compositions of Hebridean granites involved in hydrothermal systems.

Map of Localities

Locality Pages

LocalityCitation Details
Dippin Sill, Isle of Arran, North Ayrshire, Scotland, UK

Mineral Occurrences

LocalityMineral(s)
Dippin Sill, Isle of Arran, North Ayrshire, Scotland, UKⓘ Amphibole Supergroup, ⓘ Analcime, ⓘ Apatite, ⓘ Augite, ⓘ Calcite, ⓘ Fayalite-Forsterite Series, ⓘ Natrolite, ⓘ Nepheline, ⓘ Pegmatite, ⓘ Plagioclase, ⓘ Pyroxene Group, ⓘ Riebeckite, ⓘ Teschenite, ⓘ Titanium-bearing Augite, ⓘ Zeolite Group

See Also

These are possibly similar items as determined by title/reference text matching only.

Henderson, C. M. B., Gibb, F. G. F. (1977) Formation of analcime in the Dippin sill, Isle of Arran. Mineralogical Magazine, 41 (320) 534-537 doi:10.1180/minmag.1977.041.320.21
Gibb, F. G. F., Henderson, C. M. B. (1978) The petrology of the Dippin sill, Isle of Arran. Scottish Journal of Geology, 14 (1) 1-27 doi:10.1144/sjg14010001
Gibb, F. G. F., Henderson, C. M. B. (1996) The Shiant Isles Main Sill: structure and mineral fractionation trends. Mineralogical Magazine, 60 (398) 67-97 doi:10.1180/minmag.1996.060.398.06
Gibb, F. G. F., Henderson, C. M. B. (1996) Magmatic Processes: Do the Answers Lie in the Rocks?. Mineralogical Magazine, 60 (398) 1-3 doi:10.1180/minmag.1996.060.398.02
Henderson, C. M. B., Gibb, F. G. F. (1972) Plagioclase-Ca-rich-nepheline intergrowths in a syenite from the Marangudzi complex, Rhodesia. Mineralogical Magazine, 38 (298) 670-677 doi:10.1180/minmag.1972.038.298.03
Henderson, C. M. B., Gibb, F. G. F., Foland, K. A. (2000) Mineral fractionation and pre- and post-emplacement processes in the uppermost part of the Shiant Isles Main Sill. Mineralogical Magazine, 64 (5) 779-790 doi:10.1180/002646100549706
Gibb, Fergus G. F. (1972) A differentiated ultrabasic sheet on Sgurr Dearg, Isle of Skye. Mineralogical Magazine, 38 (299) 811-818 doi:10.1180/minmag.1972.038.299.05
Cressey, G. (1987) Skarn formation between metachalk and agglomerate in the Central Ring Complex, Isle of Arran, Scotland. Mineralogical Magazine, 51 (360) 231-246 doi:10.1180/minmag.1987.051.360.05
Hero, R. K., Windley, B. F., Ackermand, D. (1984) Grandidierite from a pelitic xenolith in the Haddo House complex, NE Scotland. Mineralogical Magazine, 48 (348) 401-406 doi:10.1180/minmag.1984.048.348.11
Henderson, C. M. B., Taylor, D. (1984) Thermal expansion behaviour of beryllonite [Na(BePO4)] and trimerite [CaMn(BeSiO4)3]. Mineralogical Magazine, 48 (348) 431-436 doi:10.1180/minmag.1984.048.348.14
Kanaris-Sotiriou, R., Gibb, F. G. F. (1985) Hybridization and the petrogenesis of composite intrusions: the dyke at An Cumhann, Isle of Arran, Scotland. Geological Magazine, 122 (4) 361-372 doi:10.1017/s0016756800031800
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: June 4, 2026 09:29:12
Go to top of page