{"corpus_id":129415939,"paper_sha":"c4df5f99134b43d7d09b16c8796d1cc51731476c","doi":"10.1046/j.0263-4929.2001.00346.x","arxiv_id":null,"pmid":null,"pmcid":null,"mag_id":1552757520,"dblp_id":null,"acl_id":null,"title":"Fractionation of bulk rock composition due to porphyroblast growth: effects on eclogite facies mineral equilibria, Pam Peninsula, New Caledonia","year":2002,"publication_date":"2002-01-01","venue":"","journal":{"name":"Journal of Metamorphic Geology","pages":null,"volume":"20"},"journal_issn":null,"journal_title":null,"publication_types":[],"pubmed_pub_types":null,"s2_fields_of_study":["Geology"],"reference_count":26,"citation_count":243,"influential_citation_count":14,"is_open_access":false,"arxiv_categories":null,"arxiv_license":null,"arxiv_journal_ref":null,"mesh_headings":null,"chemicals":null,"comments_corrections":null,"source_flags":1,"s2_open_access_pdf_url":null,"s2_open_access_landing_url":null,"s2_open_access_license":null,"s2_open_access_status":null,"pmc_open_access_pdf_url":null,"pmc_open_access_landing_url":null,"pmc_open_access_license":null,"pmc_open_access_status":null,"unpaywall_open_access_pdf_url":null,"unpaywall_open_access_landing_url":null,"unpaywall_open_access_license":null,"unpaywall_open_access_status":null,"abstract":"Abstract Chemically zoned porphyroblasts in metamorphic rocks indicate that diffusional processes could not maintain equilibrium conditions on a grain scale during porphyroblast growth or establish it afterwards. An effect of this inability to maintain equilibrium is the progressive removal of elements forming garnet cores from any metamorphic reaction that occurs at the porphyroblast boundaries or in the matrix of the rock. To examine this effect on mineral assemblages, the Bence–Albee matrix correction was applied to X‐ray intensity maps collected using eclogite samples from northern New Caledonia in order to determine the chemical composition of all parts of the sample. The manipulation of these element maps allows a quantitative analysis of the fractionation of the bulk rock composition between garnet cores and the matrix. A series of calculated equilibrium‐volume compositions represents the change in matrix chemistry with progressive elemental fractionation as a consequence of prograde garnet growth under high‐ P conditions. Pressure–temperature pseudosections are calculated for these compositions, in the CaO–Na 2 O–FeO–MgO–Al 2 O 3 –SiO 2 –H 2 O system. Assemblages, modal proportions and mineral textures observed in the New Caledonian eclogites can be closely modelled by progressively ‘removing’ elements forming garnet cores from the bulk rock composition. The pseudosections demonstrate how chemical fractionation effects the peak metamorphic assemblage, prograde textures and the development of retrograde assemblages.","claims":[{"public_id":"cl_ecf3625c430dd65c3e2388c79674ca62","status":"active","text":"Chemically zoned porphyroblasts indicate that diffusional processes could not maintain grain-scale equilibrium during growth or establish it afterward.","confidence":0.93,"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/claims/cl_ecf3625c430dd65c3e2388c79674ca62"},{"public_id":"cl_0fb32051705a74174d192624c70bac42","status":"active","text":"Manipulation of the element maps quantitatively analyzes fractionation of bulk rock composition between garnet cores and the matrix.","confidence":0.96,"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/claims/cl_0fb32051705a74174d192624c70bac42"},{"public_id":"cl_b6b8fd27424f1194f494a61600ed24ff","status":"active","text":"Pressure–temperature pseudosections based on progressively fractionated equilibrium-volume compositions closely model the observed mineral assemblages, modal proportions and mineral textures of the New Caledonian eclogites.","confidence":0.95,"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/claims/cl_b6b8fd27424f1194f494a61600ed24ff"},{"public_id":"cl_f1e04716293e9fa494c22fd61d4d205d","status":"active","text":"The Bence–Albee matrix correction was applied to X-ray intensity maps from eclogite samples from northern New Caledonia to determine the chemical composition of all sample parts.","confidence":0.98,"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/claims/cl_f1e04716293e9fa494c22fd61d4d205d"}],"concepts":[{"public_id":"co_1495a94ecc8f7cbe703806a90dd7aa63","status":"active","name":"equilibrium-volume compositions","description":"Calculated compositions representing the matrix chemistry at successive stages of elemental fractionation.","types":["calculated composition"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_1495a94ecc8f7cbe703806a90dd7aa63"},{"public_id":"co_6d4287e3ef7d49e118d147266745c1e3","status":"active","name":"X-ray intensity maps","description":"Spatial maps recording X-ray signal intensities for elements across the sample.","types":["measurement"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_6d4287e3ef7d49e118d147266745c1e3"},{"public_id":"co_70e8ec3731aa3a2b95e9c9c04aaaedca","status":"active","name":"eclogite samples from northern New Caledonia","description":"The eclogite material analyzed to investigate bulk-composition fractionation during metamorphism.","types":["geological material"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_70e8ec3731aa3a2b95e9c9c04aaaedca"},{"public_id":"co_844a24a67f0d8b855ce17679946e93e2","status":"active","name":"mineral assemblages, modal proportions and mineral textures","description":"The coexisting minerals, their relative amounts, and their spatial or morphological relationships in the eclogites.","types":["petrological features"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_844a24a67f0d8b855ce17679946e93e2"},{"public_id":"co_90e2c5ebff0283b80d5ada1e1d69ca0d","status":"active","name":"Bence–Albee matrix correction","description":"An X-ray microanalysis correction used to convert measured intensities into quantitative compositional information.","types":["method"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_90e2c5ebff0283b80d5ada1e1d69ca0d"},{"public_id":"co_92dd73282c0ce3c592243b1f598c829b","status":"active","name":"garnet cores","description":"The inner portions of garnet porphyroblasts that formed during metamorphic growth.","types":["mineral domain"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_92dd73282c0ce3c592243b1f598c829b"},{"public_id":"co_b3748395dd75e6064d4ee24e33ea7503","status":"active","name":"bulk rock composition","description":"The aggregate chemical composition of the rock, including material partitioned between garnet and matrix.","types":["geochemical property"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_b3748395dd75e6064d4ee24e33ea7503"},{"public_id":"co_bae668a4a7126aeba2d609d21cb17f8f","status":"active","name":"pressure–temperature pseudosections","description":"Phase-equilibrium diagrams calculated as a function of pressure and temperature for a specified chemical system.","types":["model"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_bae668a4a7126aeba2d609d21cb17f8f"},{"public_id":"co_ed367604a59292d440bd7f9cb7128e60","status":"active","name":"diffusional processes","description":"Element-transport processes that can redistribute chemical components within or between mineral grains.","types":["process"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_ed367604a59292d440bd7f9cb7128e60"},{"public_id":"co_ed4a4772a792d3aeef64aad08436947c","status":"active","name":"chemically zoned porphyroblasts","description":"Porphyroblastic metamorphic minerals whose chemical composition varies spatially within individual grains.","types":["mineral feature"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_ed4a4772a792d3aeef64aad08436947c"},{"public_id":"co_f03bb16a6312da0a41790bbe40df98cc","status":"active","name":"matrix chemistry","description":"The chemical composition of the rock matrix surrounding the garnet porphyroblasts.","types":["geochemical property"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_f03bb16a6312da0a41790bbe40df98cc"},{"public_id":"co_f8f47253f68a56931196587eb9ce467f","status":"active","name":"prograde garnet growth","description":"Garnet formation during the prograde increase of metamorphic pressure and temperature.","types":["metamorphic process"],"aliases":[],"contributors":[{"id":35,"public_id":"b2adb6bfad","public_label":"Anonymous (b2adb6bfad)","roles":["extraction"],"url":"https://sah.borca.ai/u/b2adb6bfad"},{"id":32,"public_id":"7c402c1b98","public_label":"뀨 (7c402c1b98)","roles":["review"],"url":"https://sah.borca.ai/u/7c402c1b98"},{"id":171,"public_id":"b9tnx83g25","public_label":"eunsjani (b9tnx83g25)","roles":["review"],"url":"https://sah.borca.ai/u/b9tnx83g25"},{"id":1165,"public_id":"ezd9qvkvax","public_label":"The Reverser‮ (ezd9qvkvax)","roles":["review"],"url":"https://sah.borca.ai/u/ezd9qvkvax"}],"url":"https://sah.borca.ai/concepts/co_f8f47253f68a56931196587eb9ce467f"}],"external_ids":{"DOI":"10.1046/j.0263-4929.2001.00346.x","ArXiv":null,"PubMed":null,"PubMedCentral":null,"MAG":1552757520,"DBLP":null,"ACL":null},"open_access":{"is_open_access":false,"pdf_url":null,"landing_url":"https://sah.borca.ai/papers/129415939","source":null,"pdf_url_source":null,"license":null,"reason":"pdf_url_not_indexed"},"reference_availability":{"status":"available","references_indexed":true,"full_text_available":false,"full_text_source":null,"count_basis":"semantic_scholar_metadata","extraction_status":"not_applicable","reason":null},"source":{"provider":"episteme2","base_corpus":"semantic_scholar_dump","freshness_mode":"unknown","basis":["semantic_scholar_metadata","postgres_metadata"],"limits":["paper metadata is based on indexed upstream scholarly datasets","claims and concepts are available only for extracted papers","absence of claims or concepts means no extracted graph data is available in this response"],"status":"available","degraded":false,"degraded_reasons":[],"diagnostics":{"status":"available","degraded":false,"degraded_reasons":[],"metadata_status":"available","graph_status":"available","abstract_status":"available"},"source_flags":1},"paper_id":638611,"paper_uid":"0cbcf046-93ff-4b6e-80e4-cb1ada7c0f2e","canonical_identity":{"paper_id":638611,"paper_uid":"0cbcf046-93ff-4b6e-80e4-cb1ada7c0f2e","identity_status":"available","lookup_basis":"semantic_scholar_external_id","compatibility_path":"corpus_id"},"url":"https://sah.borca.ai/papers/129415939"}