岩盆
- 与 岩盆 相关的网络例句 [注:此内容来源于网络,仅供参考]
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Through several years' field observation and through the comprehensive analysis on fossils identification, rock geochemical test result and rock property, it is shown that the late Paleozoic radiolarian silicalite and its rock combination are a suite of oceanic basin abyssal facies deposition, and the Bazukeng Formation of Dengshan Group is a suite of early Paleozoic neritic continental shelf bathyal facies deposition.
经数年野外多次观察和对室内化石鉴定、岩石地球化学测试结果以及岩石学特征的综合分析表明,所发现的含晚古生代放射虫硅质岩及其岩石组合是一套洋盆深水相沉积;登山群拔竹坑组,是早古生代的一套浅水陆棚-深水陆棚-半深海相沉积。
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It was revealed that the radiolarians in the pebbles dated from Tournaisian to early Visean in age.Geochemical characteristics of the pebbles implied that the radiolarian was deposited in a small oceanic basin,indicating that Kelamaili oceanic basin was closed in the late Early Carboniferous and a quick uprising occurred in the Kelamaili orogenic belt during early Jurassic.
关于两板块缝合的时代,地质学者存在较大争论,有早古生代、泥盆纪、早石炭世不同观点:蔡文俊(1986)根据放射虫研究认为缝合时代为早石炭世[1],何国琦等(2001)认为克拉麦里造山带是由克拉麦里早古生代洋闭合形成[2],舒良树和王玉净(2003)根据放射虫动物群对比认为克拉麦里蛇绿岩形成年龄为晚泥盆世法门期—早石炭世杜内
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Saltwater reports Want to know the hot spots to hook rockfish or pull pots for Dungeness crab?
盐水报告要知道热点钩岩或拉盆为邓杰内斯角螃蟹?
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Tholeiite has a zircon SHRIMP U-Pb age of 352 Ma, suggesting that the formation of the ophiolites may have continued till the Late Devonian-Early Carboniferous.
拉斑玄武岩 SHRIMP 锆石年龄352 Ma ,说明蛇绿岩的形成可持续到晚泥盆世—早石炭世。
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The basalt is belong island arc tholeiite and series of the calc-alkaline,and have character of island arc in rare earth element and trace element.
玄武岩属岛弧拉斑玄武岩和钙碱性系列,属太平洋型钠质类型,稀土、微量元素显示具岛弧特征,大地构造位置为岛弧中心靠近大洋一侧,与南侧那拉提晚泥盆—早石炭世侵入岩共同组成火山弧,同为古亚洲洋向北俯冲的产物。
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From bottom to top, a complete terrigeous sequence in fault-depressed lacustrine basin consists of the following sequence units in turn: Sequence Boundary→Lowstand System Tract (no coast-onlap)→Trangressive System Tract (distinct coast-onlap)→Highstand System Tract being composed aggradational lacustrine mudstone with low sedimentation rate→Regressive System Tract (distinct coast-dropback)→Sequence Boundary.
断陷湖盆中一个完整的陆相层序自下而上依次由下列层序单元构成;层序界面→无湖岸上超的低水位体系域→湖岸显著上超的水进体系域→由沉积速率缓慢的垂向加积型湖相泥质岩构成的高水位体系域→湖岸显著退却的水退体系域→层序界面。
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The confirmation of OIB suggests that Altun area existed paleo-oceanic basin in early Paleozoic, which therefore supports the existence of Hongliugou ophiolite and also implying a mantle plume activity at that time.
OIB的确定说明早古生代初,区内存在古洋盆,从另一个侧面证实红柳沟蛇绿岩的存在,也暗示当时就可能出现地幔热柱活动印记。
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This dissertation was focused on the research about the formation and evolution of NQB from the Late Triassic to the early middle Epoch of Jurassic Period, including integrated analyzing the characteristic of the key stratigraphic surfaces, the time of the key stratigraphy, regional rock straigraphy, biostratigraphy and chronostratigraphy, sedimentary system and depositional facies. On basis of these analysis, a tectonic evolution model have been established for NQB during from the Late Triassic to the early middle Epoch of Jurassic Period.1. After the systematic surface analysis about main stratigraphy units, we found that:(1) the bottom of Xiaochaka formation was comformity with the middle Triassic in the basin, and in the north margin it was deposited and overlapped on the different period stratigraphy before Triassic.(2) The top surface of Xiaochaka formation developed regionally karst and paleo-karst breccia, and was uncomformity with Nadigangri Formation, these things suggest that NQB in Xiaochaka depositing stage was developed from middle Triassic basin, and then an extensive regression occurred, the deposition was over and erosion come into being.(3) The lithologic assemblage, geochemistry, mixed fossils, and stratigraphy overlapping characteristic of Quemocuo Formation in early middle Jurassic indicted that the uncomformity surface was an extension-unconformity.2. Integrated analysis about stratigraphy division and correlation indicted that:(1) the paleontologic assemblage of Xiaochaka formation show its time was Carian -Norian stage of late Triassic. According to it was overlapped by late Triassic Nadigangri Formation, so Xiaochaka formation should be Carian - early Norian stage.(2) the SHRIMP Zircon U-Pb age of Nadigangri formation volcanic rocks wear vary form 216 to 205 Ma, so its time should be Norian, but maybe extended into Rhaetian Stage.(3) The age of its bottom volcanic rocks, the fossil assemblages of its middle and upper members and overlapped by lower Jurassic, indicted the age of Riganpeicuo Formation was Norian - Rhaetian stage. And the same time, the volcanic rocks geochemistry of Nadigangri and Riganpeicuo formation both reflected that they wear formed in rift tectonic settings. The lower lithologic and surface characteristic, fossil assemblages and its upper maybe was conformity with lower Jurassic, all reflected that the age of Tumengela Formation in Tumen area should be Norian - Rhaetian stage.
论文对晚三叠世—中侏罗世早期盆地的形成与演化开展了研究,包括关键地层界面特征分析、关键地层时代归属分析、区域岩石地层、生物地层和年代地层的综合对比分析、区域沉积体系与沉积相分析、岩相古地理分析,最终建立晚三叠世—中侏罗世早期羌塘盆沉积—构造动力演化模式。1、系统的对各地层单元的界面分析发现:(1)肖茶卡组底界在盆地内部与中三叠统整合关系,在盆地北缘为沉积超覆于不同时代的前三叠系之上:(2)肖茶卡组顶界面发育古岩溶角砾岩,与上覆那底岗日组为岩溶不整合接触,说明肖茶卡组沉积时期的羌塘盆地是在早中三叠世的盆地基础发展起来的,后期出现了广泛的海退事件,使盆地结束沉积并遭受风化剥蚀作用;(3)中侏罗统雀莫错组的岩性组合特征、岩石化学特征、古生物化石混积和地层的沉积超覆现象均表现出裂陷环境下形成的伸展不整合面的特征。2、综合地层划分与对比分析认为:(1)肖茶卡组古生物化石组合反映其时代为晚三叠世卡尼期—若利期,根据其上被上三叠统那底岗日组不整合覆盖,将其时代厘定为卡尼期—若利期早期;(2)那底岗日组火山岩SHRIMP锆石U-Pb年龄在216~205 Ma之间,其时代主要为若利期,可能包含有瑞替期:(3)日干配错组底部火山岩的年龄、中上部化石组合及其被下侏罗统整合覆盖,综合反映的时代为晚三叠世若利期—瑞替期,而且那底岗日组火山岩和日干配错组火山岩的地球化学成分分析反映两者均为引张构造背景下的产物;土门地区的土门各拉组的下部岩性及界面特征、化石组合和上部可能被下侏罗统整合覆盖,综合反映其时代为若利期—若利期。
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Hypogene high thermal or deep source epi-mesothermal condition and it is not only stressed the mantle source simply but also the crust-mantle;②in order to guid ore exploration better the artificial classification of uranium deposits should be broken and uranium ore-forming system strengthened;③much attention should be paid to searching the diabase-hosted rich uranium ore in strongly argillized cataclastic zone;④attention should be paid to the influence of basement of volcanic basin on the uranium ore formation that should be undstood both in feeling and theoretically through the ore propect process;⑤relation of red basin with uranium ore formation can be made clear from analyzing tectonics, paleo-climate and time and it is not only theoretically important but also helpful to uranium ore prediction;⑥crypto explosive pipe is an uranium ore, rich uranium ore host structure and it is the next goal for uranium ore exploration in east China.
摘要文章论述了华东火山岩型铀矿找矿值得重视的地质问题:①铀成矿既可形成于浅源浅成低温条件,也可形成于深源深成高温或深源浅成中低温条件,在强调深源时,不是简单地认为是幔源就可以了,还必须强调壳幔作用的地质过程;②打破人为的&类型&划分,加强&铀成矿系统&的研究,更好地指导找矿;③研究基性脉体与铀成矿问题应注意构造、岩石矿物成分、成因、蚀变与成矿3大问题,注意寻找泥岩化作用强烈的破碎辉绿岩脉中的富铀矿;④火山盆地基底对铀成矿的作用主要是提供铀源,将基底对铀成矿的影响从感性认识推向理性认识,有效地指导找矿;⑤红盆与铀成矿关系可以从构造、古气候及时间分析研究中得出结论,它不仅仅是一个理论问题,而且有助于铀成矿预测;⑥隐爆角砾岩筒是铀成矿、成富矿的重要储矿构造,是华东火山岩型铀矿找矿的新领域。
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Against the background of the special structure of the northern steep slope ,many kinds of sandy conglomeratic fans have been formed in the strata,which become the major exploration target now.
东营凹陷是东部陆相断陷湖盆一典型代表,其北部陡坡带特殊的构造背景,使沉积地层中各种成因的砂砾岩扇体极为发育,并成为勘探的重要目标。
- 推荐网络例句
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Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).
呼气,收缩臀部肌肉;拱起身体,尽量抬起头来,右腿伸直朝向天花板(膝微屈,以避免肌肉紧张)。
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The cost of moving grain food products was unchanged from May, but year over year are up 8%.
粮食产品的运输费用与5月份相比没有变化,但却比去年同期高8%。
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However, to get a true quote, you will need to provide detailed personal and financial information.
然而,要让一个真正的引用,你需要提供详细的个人和财务信息。