{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,11,3]],"date-time":"2025-11-03T13:26:45Z","timestamp":1762176405117,"version":"3.28.0"},"reference-count":15,"publisher":"Geological Society of London","issue":"2","license":[{"start":{"date-parts":[[1996,11,1]],"date-time":"1996-11-01T00:00:00Z","timestamp":846806400000},"content-version":"stm-asf","delay-in-days":0,"URL":"https:\/\/doi.org\/10.15223\/policy-002"}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["SJG"],"published-print":{"date-parts":[[1996,11]]},"abstract":"<jats:title>Synopsis<\/jats:title>\n          <jats:p>\n            Unlike many other ophiolites, the lower-crustal sequence in the Shetland ophiolite has not been been formed in situ as a series of cumulate layers in the base of a magma chamber overlying the harzburgitic mantle. Field evidence shows that the layers were intruded sequentially above the mantle. Dunite rose as a fluid through mantle conduits, relics of which are preserved as invasive pods and sheets within the harzburgite. It formed an intrusive layer several kilometres thick between the mantle and an overlying banded wehrlite\u2013clinopyroxenite layer, relics of which are preserved in places in the roof of the dunite intrusion as partially assimilated xenoliths and screens. A similarly uniform and thick intrusive layer of gabbro was emplaced immediately above the dunite layer and contains xenoliths and screens of the wehrlite\u2013clinopyroxenite layer in both its base and its roof. A mixed gabbro\u2013microgabbro layer lies immediately above the gabbro and has been cut repeatedly by parallel basic sheets giving the layer a quasi-sheeted-dyke appearance. However, the sheets are more nearly parallel than normal to the gabbro and dunite layers and have been intruded from outside the exposed layered sequence. The succession listed is lying on its side forming a nappe, in which both the layers and the sheets are vertical. It is not clear whether the succession had been rotated into this position before or after the sheets were emplaced. It is suggested that the dunite in the mantle was formed in the manner proposed by\n            <jats:xref ref-type=\"bibr\">\n              Kelemen\n              <jats:italic>et al.<\/jats:italic>\n              in 1995\n            <\/jats:xref>\n            , that is that MORB produced by adiabatic melting in the mantle was undersaturated in orthopyroxene and reached the top of the mantle by intergranular flow through the mantle during which the porosity along the flow path was increased by dissolution of the pyroxenes, thus concentrating the flow into dunite conduits. Under these circumstances the flow of liquid MORB through the solid dunite conduits, because of increased porosity and decreased grain adhesion, could possibly lead to fluidization of the dunite in the conduits. The fluidized dunite would be forced upwards out of the mantle to form the overlying intrusive dunite layer.\n          <\/jats:p>","DOI":"10.1144\/sjg32020151","type":"journal-article","created":{"date-parts":[[2010,1,15]],"date-time":"2010-01-15T00:30:59Z","timestamp":1263515459000},"page":"151-158","update-policy":"http:\/\/dx.doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":6,"title":["The Shetland Ophiolite Complex: field evidence for the intrusive emplacement of the \u2018cumulate\u2019 layers"],"prefix":"10.1144","volume":"32","author":[{"given":"Derek","family":"Flinn","sequence":"first","affiliation":[{"name":"Department of Earth Sciences, University of Liverpool, Liverpool L69 3BX"}]}],"member":"1881","published-online":{"date-parts":[[2022,6,7]]},"reference":[{"issue":"12","key":"e_1_2_1_2_1","first-page":"24","article-title":"Ophiolites","volume":"17","author":"ANON","year":"1972","unstructured":"ANON. 1972. Ophiolites. Geotimes 17(12), 24\u20135.","journal-title":"Geotimes"},{"key":"e_1_2_1_3_1","first-page":"245","volume-title":"Magmatic processes and plate tectonics","author":"BARTHOLOMEW I. D.","year":"1993","unstructured":"BARTHOLOMEW I. D. 1993. The interaction and geometries of diapiric uprise centres along mid-ocean ridges \u2013 evidence from mantle fabric studies of ophiolite complexes. In , Prichard H. M., Alabaster T., Harris N. B. W., Neary C. R. (eds.), Magmatic processes and plate tectonics. Geological Society, London, Special Publications 76, 245\u201356."},{"key":"e_1_2_1_4_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-246X.1974.tb05446.x"},{"key":"e_1_2_1_5_1","doi-asserted-by":"publisher","DOI":"10.1144\/gsjgs.114.1.0107"},{"key":"e_1_2_1_6_1","doi-asserted-by":"publisher","DOI":"10.1144\/sjg27010011"},{"key":"e_1_2_1_7_1","first-page":"23","volume-title":"Ophiolites","author":"GASS I. G.","year":"1980","unstructured":"GASS I. G. 1980. The Troodos massif: its role in the unravelling of the ophiolite problem and its significance in the understanding of constructive plate margin processes. In , Panayiotou A. (ed.), Ophiolites. Proceedings of the International Ophiolite Symposium, Cyprus 1979, 23\u201335."},{"key":"e_1_2_1_8_1","volume-title":"The chromite of the Shetland Complex","author":"GASS I. G.","year":"1982","unstructured":"GASS I. G., NEARY C. R., PRICHARD H. M., BARTHOLOMEW I. D. 1982. The chromite of the Shetland Complex. A report for the Commission of European Communities. Department of Earth Sciences, The Open University, UK."},{"key":"e_1_2_1_9_1","volume-title":"Aeromagnetic map of part of Great Britain and Northern Ireland: Sheet 16","author":"INSTITUTE OF GEOLOGICAL SCIENCES","year":"1968","unstructured":"INSTITUTE OF GEOLOGICAL SCIENCES 1968. Aeromagnetic map of part of Great Britain and Northern Ireland: Sheet 16. H.M.S.O."},{"key":"e_1_2_1_10_1","doi-asserted-by":"publisher","DOI":"10.1038\/375747a0"},{"key":"e_1_2_1_11_1","unstructured":"LIPPARD S. J. SHELTON A. W. GASS I. G. 1986. The ophiolite of northern Oman . Geological Society of London Memoirs 11 ."},{"key":"e_1_2_1_12_1","first-page":"B87","article-title":"Magmatic platinum element concentrations and hydrothermal upgrading in Shetland ophiolite complex","volume":"103","author":"LORD R. A.","year":"1994","unstructured":"LORD R. A., PRICHARD H. M., NEARY C. R. 1994. Magmatic platinum element concentrations and hydrothermal upgrading in Shetland ophiolite complex. Transactions of the Institute of Mining and Metallurgy (Section B: Applied earth science) 103, B87\u2013106.","journal-title":"Transactions of the Institute of Mining and Metallurgy (Section B: Applied earth science)"},{"key":"e_1_2_1_13_1","first-page":"1173","volume-title":"The Caledonian orogen \u2013 Scandinavia and related areas","author":"PRICHARD H. M.","year":"1985","unstructured":"PRICHARD H. M. 1985.The Shetland ophiolite. In , Gee D. J., Sturt B. A. (eds.), The Caledonian orogen \u2013 Scandinavia and related areas. Wiley, New York, 1173\u201384."},{"key":"e_1_2_1_14_1","doi-asserted-by":"publisher","DOI":"10.1144\/GSL.JGS.1934.090.01-04.21"},{"key":"e_1_2_1_15_1","doi-asserted-by":"publisher","DOI":"10.1017\/S0016756800019762"},{"key":"e_1_2_1_16_1","doi-asserted-by":"publisher","DOI":"10.2475\/ajs.273.7.594"}],"container-title":["Scottish Journal of Geology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.lyellcollection.org\/doi\/pdf\/10.1144\/sjg32020151","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2024,11,19]],"date-time":"2024-11-19T17:24:13Z","timestamp":1732037053000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.lyellcollection.org\/doi\/10.1144\/sjg32020151"},"secondary":[{"URL":"https:\/\/geoscienceworld.org\/sjg\/article-lookup?doi=10.1144\/sjg32020151","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[1996,11]]},"references-count":15,"journal-issue":{"issue":"2","published-online":{"date-parts":[[2009,11,10]]},"published-print":{"date-parts":[[1996,11]]}},"alternative-id":["10.1144\/sjg32020151"],"URL":"https:\/\/doi.org\/10.1144\/sjg32020151","relation":{},"ISSN":["0036-9276","2041-4951"],"issn-type":[{"type":"print","value":"0036-9276"},{"type":"electronic","value":"2041-4951"}],"subject":[],"published":{"date-parts":[[1996,11]]},"assertion":[{"value":"1996-05-30","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2022-06-07","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}]}}