{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,27]],"date-time":"2026-01-27T05:15:37Z","timestamp":1769490937782,"version":"3.49.0"},"reference-count":0,"publisher":"Geological Society of London","license":[{"start":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T00:00:00Z","timestamp":1769126400000},"content-version":"am","delay-in-days":0,"URL":"https:\/\/www.geolsoc.org.uk\/publications\/lyell-collection\/user-license-1-1"},{"start":{"date-parts":[[2027,1,23]],"date-time":"2027-01-23T00:00:00Z","timestamp":1800662400000},"content-version":"am","delay-in-days":365,"URL":"https:\/\/www.geolsoc.org.uk\/publications\/lyell-collection\/user-license-1-2"}],"funder":[{"DOI":"10.13039\/100020595","name":"National Science and Technology Council","doi-asserted-by":"publisher","award":["114-2116-M-003-007-MY3"],"award-info":[{"award-number":["114-2116-M-003-007-MY3"]}],"id":[{"id":"10.13039\/100020595","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["www.lyellcollection.org"],"crossmark-restriction":true},"short-container-title":["JGS"],"abstract":"\n The Meguma Terrane of the Northern Appalachians is primarily composed of Cambro-Ordovician meta-pelites and meta-psammites that were intruded by Late Devonian (380\u2212360 Ma) granitic Plutons. The Port Mouton Pluton (373 \u00b1 1 Ma) is composed of tonalite and monzogranite, contains silicic microgranular enclaves, and is cross-cut by lamprophyric dykes. The silicic enclaves are peraluminous, magnesian, and calc-alkalic to calcic. The enclaves can be divided into two groups. The Group 1 enclaves are temporally, compositionally, and isotopically (\n \n \n \n \n N<\/mml:mi>\n d<\/mml:mi>\n <\/mml:mrow>\n \n 373<\/mml:mn>\n <\/mml:mrow>\n <\/mml:mover>\n <\/mml:math>\n <\/jats:inline-formula>\n = \u22121.2 to +1.5) similar to the host Port Mouton Pluton (PMP). The Group 2 enclaves are Si-rich (SiO\n 2<\/jats:sub>\n = 74.3\u221279.7 wt%) and Al-poor (Al\n 2<\/jats:sub>\n O\n 3<\/jats:sub>\n = 10.0\u221212.2 wt%). The youngest zircons are Early Cambrian (529 \u00b1 6 Ma) and the rocks are isotopically different (\n \n \n \n \n N<\/mml:mi>\n d<\/mml:mi>\n <\/mml:mrow>\n \n 530<\/mml:mn>\n <\/mml:mrow>\n <\/mml:mover>\n <\/mml:math>\n <\/jats:inline-formula>\n = \u22126.7 to -6.4). MELTS modeling (P = 3 kbar; \u0192O\n 2<\/jats:sub>\n = NNO = +1; H\n 2<\/jats:sub>\n O = 2.00 wt%) shows that fractional crystallization can generate the range of PMP rock compositions. The parental magma of the PMP was likely derived by partial melting of sub-Meguma Terrane rocks in a lower crustal hot zone over a 20\u221230 million year time period. The Group 2 enclaves are xenoliths derived by melting of meta-sedimentary upper crust rocks of Avalonia.\n <\/jats:p>","DOI":"10.1144\/jgs2025-153","type":"journal-article","created":{"date-parts":[[2026,1,23]],"date-time":"2026-01-23T06:28:05Z","timestamp":1769149685000},"update-policy":"https:\/\/doi.org\/10.1144\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Silicic microgranular enclaves of the Late Devonian Port Mouton Pluton: petrological implications for a Peripheral Pluton of the Meguma Terrane, Northern Appalachians"],"prefix":"10.1144","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-2289-2903","authenticated-orcid":true,"given":"J.","family":"Gregory Shellnutt","sequence":"first","affiliation":[{"name":"National Taiwan Normal University, Department of Earth Sciences, 88 Tingzhou Road Section 4, Taipei 11677, Taiwan"}]},{"given":"Jaroslav","family":"Dostal","sequence":"additional","affiliation":[{"name":"Saint Mary's University, Department of Geology, 923 Robie Street, Halifax, Nova Scotia, B3H 3C3, Canada"}]},{"given":"Sam","family":"Uthup","sequence":"additional","affiliation":[{"name":"National Taiwan Normal University, Department of Earth Sciences, 88 Tingzhou Road Section 4, Taipei 11677, Taiwan"}]},{"given":"Yoshiyuki","family":"Iizuka","sequence":"additional","affiliation":[{"name":"Academia Sinica, Institute of Earth Sciences, 128 Academia Road Section 2, Taipei 115, Taiwan"}]},{"given":"Hao-Yang","family":"Lee","sequence":"additional","affiliation":[{"name":"Academia Sinica, Institute of Earth Sciences, 128 Academia Road Section 2, Taipei 115, Taiwan"}]}],"member":"1881","published-online":{"date-parts":[[2026,1,23]]},"container-title":["Journal of the Geological Society"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.lyellcollection.org\/doi\/pdf\/10.1144\/jgs2025-153","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2026,1,26]],"date-time":"2026-01-26T07:51:28Z","timestamp":1769413888000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.lyellcollection.org\/doi\/10.1144\/jgs2025-153"},"secondary":[{"URL":"https:\/\/pubs.geoscienceworld.org\/jgs\/article\/doi\/10.1144\/jgs2025-153\/724715\/silicic-microgranular-enclaves-of-the-late","label":"geoscienceworld"}]},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2026,1,23]]},"references-count":0,"alternative-id":["10.1144\/jgs2025-153"],"URL":"https:\/\/doi.org\/10.1144\/jgs2025-153","relation":{},"ISSN":["0016-7649","2041-479X"],"issn-type":[{"value":"0016-7649","type":"print"},{"value":"2041-479X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2026,1,23]]},"assertion":[{"value":"2025-07-31","order":0,"name":"received","label":"Received","group":{"name":"publication_history","label":"Publication History"}},{"value":"2025-12-30","order":1,"name":"revised","label":"Revised","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-01-06","order":2,"name":"accepted","label":"Accepted","group":{"name":"publication_history","label":"Publication History"}},{"value":"2026-01-23","order":3,"name":"published","label":"Published","group":{"name":"publication_history","label":"Publication History"}}],"article-number":"jgs2025-153"}}