{"title":"用于碳酸盐矿物稳定同位素提取的激光烧蚀取样器","authors":"P.C. Smalley, C.N. Maile, M.L. Coleman, J.E. Rouse","doi":"10.1016/0009-2541(92)90201-F","DOIUrl":null,"url":null,"abstract":"<div><p>LASSIE is an instrument that enables rapid (∼ 30 min) stable isotope analysis of extremely small (∼ 35-μm diameter) areas of carbonates, selected by the operator from a colour TV image of a thin rock slice. This allows<em>practical routine</em> integration of petrography with isotopic analysis.</p><p>The main technical problem—isotopic fractionation during laser ablation—has been overcome by generating correction factors based on analyses of standards (for calcite, correction factors are +1.2‰ forδ<sup>18</sup>O, —0.8‰ forδ<sup>13</sup>C. Accuracy is determined by the uncertainty (σ) in these correction factors:±0.4‰ forδ<sup>18</sup>O andδ<sup>13</sup>C. Reprocducibility of replicate analyses is also∼ ±0.4‰ (σ) forδ<sup>18</sup>O and ∼±0.2‰ forδ<sup>13</sup>C.</p><p>An example in which LASSIE analyses were performed on carbonate-cemented sandstones, demonstrated the ability of LASSIE to resolve the various components of a complex carbonate mixture. The study further demonstrated how conventional bulk analyses can give uninterpretable or, worse, misleading results.</p></div>","PeriodicalId":100231,"journal":{"name":"Chemical Geology: Isotope Geoscience section","volume":"101 1","pages":"Pages 43-52"},"PeriodicalIF":0.0000,"publicationDate":"1992-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0009-2541(92)90201-F","citationCount":"21","resultStr":"{\"title\":\"LASSIE (laser ablation sampler for stable isotope extraction) applied to carbonate minerals\",\"authors\":\"P.C. Smalley, C.N. Maile, M.L. Coleman, J.E. Rouse\",\"doi\":\"10.1016/0009-2541(92)90201-F\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>LASSIE is an instrument that enables rapid (∼ 30 min) stable isotope analysis of extremely small (∼ 35-μm diameter) areas of carbonates, selected by the operator from a colour TV image of a thin rock slice. This allows<em>practical routine</em> integration of petrography with isotopic analysis.</p><p>The main technical problem—isotopic fractionation during laser ablation—has been overcome by generating correction factors based on analyses of standards (for calcite, correction factors are +1.2‰ forδ<sup>18</sup>O, —0.8‰ forδ<sup>13</sup>C. Accuracy is determined by the uncertainty (σ) in these correction factors:±0.4‰ forδ<sup>18</sup>O andδ<sup>13</sup>C. Reprocducibility of replicate analyses is also∼ ±0.4‰ (σ) forδ<sup>18</sup>O and ∼±0.2‰ forδ<sup>13</sup>C.</p><p>An example in which LASSIE analyses were performed on carbonate-cemented sandstones, demonstrated the ability of LASSIE to resolve the various components of a complex carbonate mixture. The study further demonstrated how conventional bulk analyses can give uninterpretable or, worse, misleading results.</p></div>\",\"PeriodicalId\":100231,\"journal\":{\"name\":\"Chemical Geology: Isotope Geoscience section\",\"volume\":\"101 1\",\"pages\":\"Pages 43-52\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1992-06-10\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0009-2541(92)90201-F\",\"citationCount\":\"21\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Chemical Geology: Isotope Geoscience section\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/000925419290201F\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Chemical Geology: Isotope Geoscience section","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/000925419290201F","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
LASSIE (laser ablation sampler for stable isotope extraction) applied to carbonate minerals
LASSIE is an instrument that enables rapid (∼ 30 min) stable isotope analysis of extremely small (∼ 35-μm diameter) areas of carbonates, selected by the operator from a colour TV image of a thin rock slice. This allowspractical routine integration of petrography with isotopic analysis.
The main technical problem—isotopic fractionation during laser ablation—has been overcome by generating correction factors based on analyses of standards (for calcite, correction factors are +1.2‰ forδ18O, —0.8‰ forδ13C. Accuracy is determined by the uncertainty (σ) in these correction factors:±0.4‰ forδ18O andδ13C. Reprocducibility of replicate analyses is also∼ ±0.4‰ (σ) forδ18O and ∼±0.2‰ forδ13C.
An example in which LASSIE analyses were performed on carbonate-cemented sandstones, demonstrated the ability of LASSIE to resolve the various components of a complex carbonate mixture. The study further demonstrated how conventional bulk analyses can give uninterpretable or, worse, misleading results.
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