M. L. Tolstykh, A. D. Babansky, M. M. Pevzner, Yu. A. Kostitsyn, N. N. Kononkova, L. A. Levitskaya, A. A. Plechova
{"title":"堪察加斯列丁尼山脉坎加尔火山杂化变质岩：玄武岩岩浆与基底花岗岩相互作用的产物？","authors":"M. L. Tolstykh, A. D. Babansky, M. M. Pevzner, Yu. A. Kostitsyn, N. N. Kononkova, L. A. Levitskaya, A. A. Plechova","doi":"10.1134/S0869591125700092","DOIUrl":null,"url":null,"abstract":"<p>Unique rocks were found in an outcrop of basement granodiorites in the southern part of the Khangar caldera. The bulk composition of these rocks corresponds to high-Mg andesite (SiO<sub>2</sub> 57–63 wt %, MgO 4–8 wt %, and K<sub>2</sub>O 1.4–2 wt %). The rocks contain coexisting quartz, oligoclase, and olivine phenocrysts and a propylitic mineral assemblage (albite, calcite, chlorite, and epidote). The largest phenocrysts are similar in composition to granodiorite minerals (oligoclase <i>An</i><sub>22–28</sub>, quartz, and biotite). The olivine phenocrysts contain melt inclusions of basaltic composition (SiO<sub>2</sub> 45–48 wt %, MgO 7–10 wt %) with a high K<sub>2</sub>O content (up to 1.6 wt %). We suggest that these rocks were produced by interaction of basaltic melt with silicic intrusive material and with the xenogenic material of the granitoid intrusion.</p>","PeriodicalId":20026,"journal":{"name":"Petrology","volume":"33 4","pages":"345 - 366"},"PeriodicalIF":1.1000,"publicationDate":"2025-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hybrid Metaandesites of Khangar Volcano, Sredinny Range, Kamchatka: Product of Interaction between Basaltic Magma and Basement Granitoids?\",\"authors\":\"M. L. Tolstykh, A. D. Babansky, M. M. Pevzner, Yu. A. Kostitsyn, N. N. Kononkova, L. A. Levitskaya, A. A. Plechova\",\"doi\":\"10.1134/S0869591125700092\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>Unique rocks were found in an outcrop of basement granodiorites in the southern part of the Khangar caldera. The bulk composition of these rocks corresponds to high-Mg andesite (SiO<sub>2</sub> 57–63 wt %, MgO 4–8 wt %, and K<sub>2</sub>O 1.4–2 wt %). The rocks contain coexisting quartz, oligoclase, and olivine phenocrysts and a propylitic mineral assemblage (albite, calcite, chlorite, and epidote). The largest phenocrysts are similar in composition to granodiorite minerals (oligoclase <i>An</i><sub>22–28</sub>, quartz, and biotite). The olivine phenocrysts contain melt inclusions of basaltic composition (SiO<sub>2</sub> 45–48 wt %, MgO 7–10 wt %) with a high K<sub>2</sub>O content (up to 1.6 wt %). We suggest that these rocks were produced by interaction of basaltic melt with silicic intrusive material and with the xenogenic material of the granitoid intrusion.</p>\",\"PeriodicalId\":20026,\"journal\":{\"name\":\"Petrology\",\"volume\":\"33 4\",\"pages\":\"345 - 366\"},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2025-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Petrology\",\"FirstCategoryId\":\"89\",\"ListUrlMain\":\"https://link.springer.com/article/10.1134/S0869591125700092\",\"RegionNum\":4,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"GEOCHEMISTRY & GEOPHYSICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Petrology","FirstCategoryId":"89","ListUrlMain":"https://link.springer.com/article/10.1134/S0869591125700092","RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
Hybrid Metaandesites of Khangar Volcano, Sredinny Range, Kamchatka: Product of Interaction between Basaltic Magma and Basement Granitoids?
Unique rocks were found in an outcrop of basement granodiorites in the southern part of the Khangar caldera. The bulk composition of these rocks corresponds to high-Mg andesite (SiO2 57–63 wt %, MgO 4–8 wt %, and K2O 1.4–2 wt %). The rocks contain coexisting quartz, oligoclase, and olivine phenocrysts and a propylitic mineral assemblage (albite, calcite, chlorite, and epidote). The largest phenocrysts are similar in composition to granodiorite minerals (oligoclase An22–28, quartz, and biotite). The olivine phenocrysts contain melt inclusions of basaltic composition (SiO2 45–48 wt %, MgO 7–10 wt %) with a high K2O content (up to 1.6 wt %). We suggest that these rocks were produced by interaction of basaltic melt with silicic intrusive material and with the xenogenic material of the granitoid intrusion.
期刊介绍：
Petrology is a journal of magmatic, metamorphic, and experimental petrology, mineralogy, and geochemistry. The journal offers comprehensive information on all multidisciplinary aspects of theoretical, experimental, and applied petrology. By giving special consideration to studies on the petrography of different regions of the former Soviet Union, Petrology provides readers with a unique opportunity to refine their understanding of the geology of the vast territory of the Eurasian continent. The journal welcomes manuscripts from all countries in the English or Russian language.
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