LI ChangHao, PAN HongDi, SUO QingYu, CHU XiangKai, SEITMURATOVA Eleonora
{"title":"哈萨克斯坦Kounrad矿区贫、富岩体性质比较及其成矿意义","authors":"LI ChangHao, PAN HongDi, SUO QingYu, CHU XiangKai, SEITMURATOVA Eleonora","doi":"10.18654/1000-0569/2023.11.04","DOIUrl":null,"url":null,"abstract":"中亚造山带发育众多大型-超大型斑岩型Cu矿床。尽管这些矿床通常发育时代相近的大规模岩浆作用,但只存在少数成矿岩浆。因此,如何区分矿区内的成矿和贫矿岩浆对于找矿勘查至关重要。为了探讨这一问题,本文对哈萨克斯坦科翁腊德矿集区石炭纪的贫矿岩浆岩和成矿花岗闪长斑岩中的磷灰石、角闪石、黑云母和斜长石进行结构和成分分析,对弱蚀变岩石开展全岩主量元素分析。测试结果显示,贫矿岩浆岩和成矿花岗闪长斑岩均为富H<sub>2</sub>O的(>~4%)氧化性(>~ΔNNO+1.63)岩浆,属于中钾或高钾钙碱性系列岩石。贫矿岩浆岩中斜长石An值存在显著变化(ΔAn在26~34)并与FeO含量呈正相关,表明其经历了明显的岩浆混合作用,而该过程在成矿花岗闪长斑岩中不明显。磷灰石、角闪石和黑云母成分对比显示,成矿花岗闪长斑岩的氧逸度和H<sub>2</sub>O含量与贫矿岩浆岩没有显著差别,但它具有更高的岩浆Cl和S含量。岩浆矿物结构和成分研究表明,在岩浆迁移至地壳浅部仍含有充足的Cl、S和成矿元素是科翁腊德矿集区斑岩型Cu矿床形成的关键。在科翁腊德矿集区,具有一定成矿潜力的岩浆(如合适的氧逸度、H<sub>2</sub>O含量和存在基性岩浆补给)由于在深部过早的发生流体出溶造成Cl、S和成矿元素从岩浆中散失(如贫矿辉长岩、闪长岩、花岗闪长岩),或者岩浆中Cl含量和Cu溶解度过低造成岩浆运移和富集成矿元素能力低(如贫矿花岗岩),最终不能形成斑岩型Cu矿床。本文研究结果表明,岩浆的Cl和S含量是区分科翁腊德矿集区成矿和贫矿岩体的有效标识,而岩浆的氧逸度、H<sub>2</sub>O含量和F含量在两者间没有明显差异。","PeriodicalId":7075,"journal":{"name":"岩石学报","volume":"120 1","pages":"0"},"PeriodicalIF":1.7000,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Comparison of natures of barren and fertile intrusions in the Kounrad ore district, Kazakhstan and its implication for mineralization\",\"authors\":\"LI ChangHao, PAN HongDi, SUO QingYu, CHU XiangKai, SEITMURATOVA Eleonora\",\"doi\":\"10.18654/1000-0569/2023.11.04\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"中亚造山带发育众多大型-超大型斑岩型Cu矿床。尽管这些矿床通常发育时代相近的大规模岩浆作用,但只存在少数成矿岩浆。因此,如何区分矿区内的成矿和贫矿岩浆对于找矿勘查至关重要。为了探讨这一问题,本文对哈萨克斯坦科翁腊德矿集区石炭纪的贫矿岩浆岩和成矿花岗闪长斑岩中的磷灰石、角闪石、黑云母和斜长石进行结构和成分分析,对弱蚀变岩石开展全岩主量元素分析。测试结果显示,贫矿岩浆岩和成矿花岗闪长斑岩均为富H<sub>2</sub>O的(>~4%)氧化性(>~ΔNNO+1.63)岩浆,属于中钾或高钾钙碱性系列岩石。贫矿岩浆岩中斜长石An值存在显著变化(ΔAn在26~34)并与FeO含量呈正相关,表明其经历了明显的岩浆混合作用,而该过程在成矿花岗闪长斑岩中不明显。磷灰石、角闪石和黑云母成分对比显示,成矿花岗闪长斑岩的氧逸度和H<sub>2</sub>O含量与贫矿岩浆岩没有显著差别,但它具有更高的岩浆Cl和S含量。岩浆矿物结构和成分研究表明,在岩浆迁移至地壳浅部仍含有充足的Cl、S和成矿元素是科翁腊德矿集区斑岩型Cu矿床形成的关键。在科翁腊德矿集区,具有一定成矿潜力的岩浆(如合适的氧逸度、H<sub>2</sub>O含量和存在基性岩浆补给)由于在深部过早的发生流体出溶造成Cl、S和成矿元素从岩浆中散失(如贫矿辉长岩、闪长岩、花岗闪长岩),或者岩浆中Cl含量和Cu溶解度过低造成岩浆运移和富集成矿元素能力低(如贫矿花岗岩),最终不能形成斑岩型Cu矿床。本文研究结果表明,岩浆的Cl和S含量是区分科翁腊德矿集区成矿和贫矿岩体的有效标识,而岩浆的氧逸度、H<sub>2</sub>O含量和F含量在两者间没有明显差异。\",\"PeriodicalId\":7075,\"journal\":{\"name\":\"岩石学报\",\"volume\":\"120 1\",\"pages\":\"0\"},\"PeriodicalIF\":1.7000,\"publicationDate\":\"2023-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"岩石学报\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.18654/1000-0569/2023.11.04\",\"RegionNum\":3,\"RegionCategory\":\"地球科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"GEOLOGY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"岩石学报","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.18654/1000-0569/2023.11.04","RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"GEOLOGY","Score":null,"Total":0}
岩石学报Earth and Planetary Sciences-Geochemistry and Petrology
CiteScore
3.60
自引率
22.20%
发文量
5997
审稿时长
6 months
期刊介绍:
Acta Petrologica Sinica is an academic journal under the supervision of the Chinese Academy of Sciences and sponsored by the Chinese Society of Mineralogy, Petrology and Geochemistry and the Institute of Geology and Geophysics of the Chinese Academy of Sciences. The journal's publishing policy is to adhere to innovation, comprehensiveness, cutting-edge and orientation, advocate diversity and multi-school, rely on and unite the vast number of geoscientists across the country, explore the mysteries of nature, carry out extensive and in-depth basic theoretical research, promote the research and development of the field of earth science in my country, publish high-level scientific research results, and cultivate and train a large number of geoscientific research talents for my country.
Acta Petrologica Sinica mainly reports on various disciplines related to the basic theory of petrology, including important basic theories and applied research results in magmatic petrology, metamorphic petrology, sedimentary petrology, petrology geotectonics, rock isotope chronology and isotope geochemistry, rock mineralization, and rock-forming mineralogy. At the same time, the journal also publishes review articles, problem discussions, academic trends and book reviews.