{"doi":"10.1130/g50429.1","title":"Disparate crustal thicknesses beneath oceanic transform faults and adjacent fracture zones revealed by gravity anomalies","abstract":"<jats:title>Abstract</jats:title><jats:p>Plate tectonics describes oceanic transform faults as conservative strike-slip boundaries, where lithosphere is neither created nor destroyed. Therefore, seafloor accreted at ridge-transform intersections should follow a similar subsidence trend with age as lithosphere that forms away from ridge-transform intersections. Yet, recent compilations of high-resolution bathymetry show that the seafloor is significantly deeper along transform faults than at the adjacent fracture zones. We present residual mantle Bouguer anomalies, a proxy for crustal thickness, for 11 transform fault systems across the full range of spreading rates. Our results indicate that the crust is thinner in the transform deformation zone than in either the adjacent fracture zones or the inside corner regions. Consequently, oceanic transform faulting appears not only to thin the transform valley crust but also leads to a secondary phase of magmatic addition at the transition to the passive fracture zones. These observations challenge the concept of transform faults being conservative plate boundaries.</jats:p>","journal":"Geology","year":2023,"id":590823,"datarank":0.6470210027645507,"base_score":3.1354942159291497,"endowment":3.1354942159291497,"self_citation_contribution":0.47032413238937254,"citation_network_contribution":0.17669687037517817,"self_endowment_contribution":0.47032413238937254,"citer_contribution":0.17669687037517817,"corpus_percentile":null,"corpus_rank":null,"citation_count":22,"citer_count":20,"citers_with_citation_signal":12,"citers_with_endowment":12,"datacite_reuse_total":0,"is_dataset":false,"is_dataset_confidence":null,"is_data_producer":false,"deposit_databanks":null,"is_oa":false,"file_count":0,"downloads":0,"has_version_chain":false,"published_date":null,"fair_score":null,"fair_percentile":null,"algorithm_id":"datarank_citation_only_1hop_v6","ranking_scope":"data_only","authors":[{"id":1511574,"name":"Sibiao Liu","orcid":null,"position":1,"is_corresponding":false},{"id":1511575,"name":"Lars Rüpke","orcid":null,"position":2,"is_corresponding":false},{"id":155792,"name":"Ingo Grevemeyer","orcid":null,"position":3,"is_corresponding":false},{"id":1511576,"name":"Jason P. Morgan","orcid":null,"position":4,"is_corresponding":false},{"id":1511577,"name":"Dietrich Lange","orcid":null,"position":5,"is_corresponding":false},{"id":1251680,"name":"Yu Ren","orcid":"0000-0003-2928-138X","position":6,"is_corresponding":false},{"id":163103,"name":"Chunhui Tao","orcid":null,"position":7,"is_corresponding":false},{"id":1511573,"name":"Zhikui Guo","orcid":null,"position":0,"is_corresponding":false}],"reference_count":0,"raw_metadata":{"has_enrichment":true,"resolved":true,"title":"Disparate crustal thicknesses beneath oceanic transform faults and adjacent fracture zones revealed by gravity anomalies","abstract":"<jats:title>Abstract</jats:title><jats:p>Plate tectonics describes oceanic transform faults as conservative strike-slip boundaries, where lithosphere is neither created nor destroyed. Therefore, seafloor accreted at ridge-transform intersections should follow a similar subsidence trend with age as lithosphere that forms away from ridge-transform intersections. Yet, recent compilations of high-resolution bathymetry show that the seafloor is significantly deeper along transform faults than at the adjacent fracture zones. We present residual mantle Bouguer anomalies, a proxy for crustal thickness, for 11 transform fault systems across the full range of spreading rates. Our results indicate that the crust is thinner in the transform deformation zone than in either the adjacent fracture zones or the inside corner regions. Consequently, oceanic transform faulting appears not only to thin the transform valley crust but also leads to a secondary phase of magmatic addition at the transition to the passive fracture zones. These observations challenge the concept of transform faults being conservative plate boundaries.</jats:p>","is_dataset_classified":null,"base_score":3.1354942159291497,"endowment":3.1354942159291497,"datacite_reuse_total":0,"file_count":0,"downloads":0,"views":0,"has_version_chain":false,"is_dataset":false,"is_oa":false,"pmid":"20725694","pmcid":null,"openalex_id":"https://openalex.org/W4319345966","authors":[],"funders":[],"total_grants":0,"fwci":4.1459,"citation_percentile":0.95491199,"influential_citations":0,"citation_trend":[{"year":2023,"count":4},{"year":2024,"count":7},{"year":2025,"count":8},{"year":2026,"count":3}],"oa_status":"green","license":null,"oa_locations":[{"url":"https://oceanrep.geomar.de/id/eprint/57766/13/final_Manuscript_Guo_etal_Geology.pdf","host_type":"repository"},{"url":"https://oceanrep.geomar.de/id/eprint/57766/13/final_Manuscript_Guo_etal_Geology.pdf","host_type":"repository"},{"url":"https://pubs.geoscienceworld.org/gsa/geology/article-pdf/51/3/300/5794030/g50429.1.pdf","host_type":"publisher"},{"url":"https://oceanrep.geomar.de/id/eprint/57766/19/g50429.1.pdf","host_type":"repository"},{"url":"https://doi.org/10.1130/g50429.1","host_type":"journal"}],"fields_of_study":["earthquake and tectonic studies","Geological and Geochemical Analysis","High-pressure geophysics and materials"],"mesh_terms":[],"keywords":["Transform fault","Geology","Seafloor spreading","Seismology","Fracture zone","Crust","Lithosphere","Tectonics","Mid-ocean ridge","Oceanic crust","Ridge push","Mantle (geology)","Ridge","Gravity anomaly","Bathymetry","Geophysics","Paleontology","Subduction"],"sdg_mappings":[{"sdg_number":0,"sdg_label":"Life below water"}],"linked_datasets":[],"clinical_trials":[],"software_tools":[],"database_accessions":[],"source":"live","citation_network_status":"fetched"},"created_at":"2026-07-25T12:31:14.121535Z","pmid":null,"pmcid":null,"fwci":null,"citation_percentile":null,"influential_citations":0,"oa_status":null,"license":null,"views":0,"total_file_size_bytes":0,"version_count":0,"fair_f":null,"fair_a":null,"fair_i":null,"fair_r":null,"fair_zscore":null,"fair_rationale":null,"fair_model":null,"fair_agent_version":null,"fair_fulltext_source":null,"fair_has_llm":null,"fair_computed_at":null,"clinical_trials":[],"software_tools":[],"db_accessions":[],"linked_datasets":[],"topics":[]}