{"title":"圣胡安凹陷:科罗拉多州中南部火山覆盖盆地中的白垩纪岩石","authors":"R. Gries","doi":"10.31582/rmag.mg.22.4.167","DOIUrl":null,"url":null,"abstract":"The San Juan Sag is a foreland basin formerly adjacent to and west of the Laramide northern Sangre de Cristo uplift. Latest Laramide wrench faulting and Miocene rifting split this bounding uplift and formed the San Luis basin adjacent to and east of the sag. Concurrent volcanism concealed the San Juan Sag with over 10,000ft of intermediate-type volcanic deposits and its presence remained in doubt until oil occurrences in the volcanic rocks encouraged exploration for the underlying sedimentary rocks. Recent drilling through the volcanic field has revealed the presence of Eocene elastic sediments, the Cretaceous Lewis, Mancos and Dakota formations and Jurassic Morrison, Junction Creek, Entrada, and possibly Wanakah formations. Additionally, oil and gas shows were found and production established as a result of drilling in 1984.","PeriodicalId":101513,"journal":{"name":"Mountain Geologist","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"15","resultStr":"{\"title\":\"San Juan Sag: Cretaceous Rocks in a Volcanic-Covered Basin, South Central Colorado\",\"authors\":\"R. Gries\",\"doi\":\"10.31582/rmag.mg.22.4.167\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The San Juan Sag is a foreland basin formerly adjacent to and west of the Laramide northern Sangre de Cristo uplift. Latest Laramide wrench faulting and Miocene rifting split this bounding uplift and formed the San Luis basin adjacent to and east of the sag. Concurrent volcanism concealed the San Juan Sag with over 10,000ft of intermediate-type volcanic deposits and its presence remained in doubt until oil occurrences in the volcanic rocks encouraged exploration for the underlying sedimentary rocks. Recent drilling through the volcanic field has revealed the presence of Eocene elastic sediments, the Cretaceous Lewis, Mancos and Dakota formations and Jurassic Morrison, Junction Creek, Entrada, and possibly Wanakah formations. Additionally, oil and gas shows were found and production established as a result of drilling in 1984.\",\"PeriodicalId\":101513,\"journal\":{\"name\":\"Mountain Geologist\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1985-10-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"15\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Mountain Geologist\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.31582/rmag.mg.22.4.167\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mountain Geologist","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.31582/rmag.mg.22.4.167","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 15
摘要
圣胡安凹陷是一个前陆盆地，原与Laramide北部Sangre de Cristo隆起相邻并以西。最新的Laramide扭断作用和中新世裂陷作用使这一边界隆起分裂，形成了与凹陷相邻及以东的圣路易斯盆地。同期火山活动掩盖了圣胡安凹陷超过10,000英尺的中型火山矿床，其存在一直受到怀疑，直到在火山岩中发现石油，鼓励了对下伏沉积岩的勘探。最近在火山场的钻探发现了始新世弹性沉积物的存在，白垩纪Lewis、Mancos和Dakota地层以及侏罗纪Morrison、Junction Creek、Entrada地层，可能还有Wanakah地层。此外，由于1984年的钻探，发现了石油和天然气显示并建立了生产。
San Juan Sag: Cretaceous Rocks in a Volcanic-Covered Basin, South Central Colorado
The San Juan Sag is a foreland basin formerly adjacent to and west of the Laramide northern Sangre de Cristo uplift. Latest Laramide wrench faulting and Miocene rifting split this bounding uplift and formed the San Luis basin adjacent to and east of the sag. Concurrent volcanism concealed the San Juan Sag with over 10,000ft of intermediate-type volcanic deposits and its presence remained in doubt until oil occurrences in the volcanic rocks encouraged exploration for the underlying sedimentary rocks. Recent drilling through the volcanic field has revealed the presence of Eocene elastic sediments, the Cretaceous Lewis, Mancos and Dakota formations and Jurassic Morrison, Junction Creek, Entrada, and possibly Wanakah formations. Additionally, oil and gas shows were found and production established as a result of drilling in 1984.
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