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- Early Proterozoic high-pressure metamorphism in the Wutaishan. 五台山早元古代高压变质作用研究。
- Title: Early Proterozoic high-pressure metamorphism in the Wutaishan. 关键词:高压变质作用;顺时针P-T轨迹;五台山
- Probably formed in Early Proterozoic, it was rejuvenated repeatedly in late stage. 其形成时间可能为早元古代,后期又有多次复活。
- Late Archean and Early Proterozoic were the main period for the formation of continental crust. 晚太古宙和早元古宙是陆壳形成的主要时期,并已具现今板块活动特征。
- Wengquangou boron-iron deposit occurred within the rocks of Lieryu Formation in Liaohe Group, early Proterozoic. 翁泉沟硼铁矿床赋存于早元古宙辽河群里尔峪组。
- The early Proterozoic atmosphere and hydrosphere are similar to those of Archaeozoic in being still absent in oxygen. 早元古代的大气圈、水圈与晚太古代相似,仍为缺氧性质。
- This type of graphite deposits were formend in the Late Archaean to Early Proterozoic. 该类矿床的成矿时代多集中在晚太古代末至早元古代初期,并且具有全球性。
- The results suggest that carbon isotope is very useful for Early Proterozoic carbonate strata correlation. 作者认为,碳同位素对于早元古代碳酸盐地层的对比是很有用的。
- The mother rock derived form Archaean and Early Proterozoic metamorphic rock from the north-east part of Ordos Basin. 该区延长组母岩主要来自盆地东北缘的太古代及早元古代变质岩。
- Boron deposits of eastern Liaoning occur in a suite of Early Proterozoic metamorphic rocks, with boron orebodies existent in magnesian marble. 辽东硼矿床产于早元古代的一套变质岩内,硼矿体赋存于镁质大理岩中。
- Ordos Basin is a large multicycle superimposed basin, developed on the basement of early Proterozoic crystalline basement. 叠合盆地由于其形成演化、沉积建造的多旋回性,因而油气勘探具有勘探难度大、勘探时间长、勘探潜力大的特点。
- Wang Jia Wei Zi gold ore deposit is a new type gold mineral deposit in hypabyssal metamorphic rock series of early proterozoic era in south Liaoning. 王家崴子金矿床是辽南早元古界浅变质岩系中的一种新型金矿床。
- A number of large and superlarge magnesite and talc deposits occur in Mg_rich carbonate strata of Early Proterozoic Dashiqiao Formation in eastern Liaoning Province. 辽东地区早元古代大石桥组赋存有富镁质的碳酸盐岩建造,其中产有大型或超大型菱镁矿、滑石矿床。
- The chondrite normalized REE distribution patterns show no Eu anomalies in the late Archaean intrusive rocks but show negative Eu anomalies in the early Proterozoic ones. 鲁西晚太古代的侵入岩属无铕异常型,早元古代的侵入岩为负铕异常型;
- In the end,the relation between the metallogenesis and the evolution of Archaeozoic and Early Proterozoic earth crust is discussed basing upon the theory of rift. 最后采用裂谷理论讨论了成矿作用与太古代和早元古代地壳演化的关系。
- The Precambrian intrusive rocks in western Shandong area mainly fall into two parts:the Taishanian(Archean)and the Aolaishanian(early Proterozoic) intrusive rocks. 鲁西地区的前寒武纪侵入岩分为太古代泰山期和早元古代傲徕山期二部分。
- Mantle upwelling in the early Proterozoic led to the uplifting and extension of Archean continental crust and the formation of Liaoning-Jilin rift trough. 通过幔壳长期作用,使深部巨量成矿物质以三种方式带入成矿热卤水盆地,在一定的自然地理与物理化学条件下矿质沉淀、富集形成大型与超大型硼矿床。
- The age of granulite facies metamorphism of Baishahe rock series is early Paleozoic rather than early Proterozoic,it was certified by zircon SHRIMP age of from Al-rich gneiss. 白沙河岩系泥质变质岩石的变质锆石SHRIMP微区定年表明、白日其利沟以及金水口等地的白沙河岩系局部麻粒岩相变质作用时代为早古生代,而不是前人认为的早元古代。
- They indicate that the Archeozoic tectonic environment is continental nucleus development and crustal block formation, and the Early Proterozoic tectonic environment is represented as rift. 分别代表了太古宙的陆核发展及地块形成和早元古宙的裂谷构造等大地构造环境。
- A reversed profile of Archaean metamorphic grades is exposed in Guyang Wuchuan area of central nei Mongol, which was caused and preserved by early Proterozoic napping from north west to south east during continental collision. 由早元古代造山运动早期自北西向南东推覆作用引起并使之得以保存的太古代变质作用强度逆转的剖面出露在内蒙古中部的固阳-武川地区。