{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,28]],"date-time":"2026-07-28T15:02:10Z","timestamp":1785250930123,"version":"3.55.0"},"reference-count":64,"publisher":"American Chemical Society (ACS)","issue":"29","license":[{"start":{"date-parts":[[2026,7,13]],"date-time":"2026-07-13T00:00:00Z","timestamp":1783900800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["42166003"],"award-info":[{"award-number":["42166003"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Guangxi Scientific Projects","award":["2025GXNSFAA069324"],"award-info":[{"award-number":["2025GXNSFAA069324"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2026,7,28]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>The geodynamic mechanism responsible for Late Mesozoic magmatism in South China remains highly debated, particularly with regard to the relative contributions of the Paleo-Pacific and Neo-Tethyan subduction systems. This study documents newly identified high-Mg diorites (\u223c102 Ma) from the southern Dayaoshan area. These rocks exhibit high Mg# (up to 64), elevated Cr and Ni concentrations, and decoupled zircon Hf (\u03b5Hf(t) = \u22129.95 to \u22125.66) and whole-rock Nd (\u03b5Nd(t) = \u22128.74 to \u22128.71) isotopic signatures. Such geochemical and isotopic features are inconsistent with simple crustal melting or fluid-metasomatized mantle-wedge melting. Instead, Hf\u2013Nd isotopic and trace-element modeling indicates that their petrogenesis involved the partial melting of a subduction-related me\u0301lange source, defined as a physical mixture of metasediments and depleted mantle peridotite. The E\u2013W-trending spatial distribution of the magmatic belt (including the Cancun pluton) stands in sharp contrast to the regional NE-striking Paleo-Pacific magmatic belt. This geometric decoupling implies that the Southern Dayaoshan area was governed by far-field tectonic processes tied to Neo-Tethyan ridge subduction or slab window formation during the Early-to-Late Cretaceous transition. These results provide new constraints on the operation of a multislab geodynamic system during the Mesozoic evolution of South China.<\/jats:p>","DOI":"10.1021\/acsomega.6c00461","type":"journal-article","created":{"date-parts":[[2026,7,14]],"date-time":"2026-07-14T02:50:37Z","timestamp":1783997437000},"page":"43215-43224","source":"Crossref","is-referenced-by-count":0,"title":["Newly Identified\nEarly Cretaceous High-Mg Diorites\nin the Southern Dayaoshan Area of South China: Petrogenesis and Geodynamic\nImplications"],"prefix":"10.1021","volume":"11","author":[{"given":"Yumei","family":"Wei","sequence":"first","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]},{"name":"Guangxi Laboratory on the Study of Coral Reefs in the South China Sea , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Lanqiu","family":"Meng","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]},{"name":"Guangxi Laboratory on the Study of Coral Reefs in the South China Sea , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2810-2987","authenticated-orcid":true,"given":"Yu","family":"Zhang","sequence":"additional","affiliation":[{"name":"Guangxi University , , ,","place":["Nanning, China, 530004"]},{"name":"Guangxi Laboratory on the Study of Coral Reefs in the South China Sea , ,","place":["Nanning, China, 530004"]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"316","published-online":{"date-parts":[[2026,7,13]]},"reference":[{"key":"2026072810074656900_cit1","doi-asserted-by":"publisher","first-page":"467","DOI":"10.1146\/annurev.earth.34.031405.125014","article-title":"High-Mg andesites\nin the Setouchi volcanic belt, southwestern Japan: Analogy to Archean\nmagmatism and continental crust formation?","volume":"34","author":"Tatsumi","year":"2006","journal-title":"Annu. 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