The idea of research started with a crazy imaginary theory in the field of astrogeography, saying: We often taught ourselves and then convinced the students that the planet Earth moves despite not feeling the vibratio...The idea of research started with a crazy imaginary theory in the field of astrogeography, saying: We often taught ourselves and then convinced the students that the planet Earth moves despite not feeling the vibrations of traffic, and we listed successive scientific confirmations to indicate the rotation of the planet in a regular movement around its axis once every 24 hours, and it is running in another second movement around the sun once every 365¼ days, so are they only two movements, no more?! Is it possible for him to run at a regular speed in an additional direction?展开更多
Based on the study of REE in Mesozoic-Cenozoic sandstones, the paper indicates that Jurassic Fanghushan and Yuantongshan Formations and Lower Cretaceous Zhougongshan Formation have ∑REE of 157 μg·g^(-1), δ_(Eu...Based on the study of REE in Mesozoic-Cenozoic sandstones, the paper indicates that Jurassic Fanghushan and Yuantongshan Formations and Lower Cretaceous Zhougongshan Formation have ∑REE of 157 μg·g^(-1), δ_(Eu) of 0.69 and (La/Yb)_N of 11.1, which are similar to the Foziling and Luzhenguan Groups, and it implies that the latter may be the source rocks of the former. The Sanjianpu and Heishidu Formations have high REE concentrations (∑REE=264.8 μg·g^(-1), 328.2 μg·g^(-1) respectively), high Eu anomaly (δ_(Eu)=0.57, 0.67 respectively) and lower Eu/Sm ratios (0.18～0.19), which differs from existent metamorphic rocks in the Dabie Mountains, so where their source rocks came from remains to be studied. The REE features of the Zhengyangguan Formation can be comparable to the Dabie complex and Luzhenguan Group, which shows that the Dabie complex had suffered unroofing in Neocene and constituted the source rocks. Mesozoic sandstones in Huainan area have lower REE concentrations (∑REE=80.9 μg·g^(-1)), high Eu anomaly (δ_(Eu)=0.66) and (La/Yb)_N of 5.7, and it indicates that their source rocks may not come from the Dabie Mountains.展开更多
The characteristics of rare earth elements in the Devonian and Carboniferous volcanic rocks were studied in the north Altay. And the mechanism of formation of volcanic rocks were discussed by using the rare earth elem...The characteristics of rare earth elements in the Devonian and Carboniferous volcanic rocks were studied in the north Altay. And the mechanism of formation of volcanic rocks were discussed by using the rare earth elements. The correlativity of rare earth elements and major elements shows that the fractional crystallization is undistinguishable during the formation of Devonian and Carboniferous volcanic rocks, and the mechanism of formation of volcanic rocks may be the partial melting. The further study of the relationship of manifold rare earth elements shows that the mechanism of formation of Devonian and Carboniferous volcanic rocks in the north Altay is the partial melting. And the result also shows that the rare earth elements in the Devonian and Carboniferous volcanic rocks inherited the characteristics of those in its source materiels.展开更多
北黄海泥质区具有地理位置独特、陆源物质供应丰富、沉积环境复杂等特点,为了更好地理解全球变化背景下对北黄海“源-汇”过程的影响,对北黄海泥质区边缘BS24岩芯沉积物进行了AMS14C测年、粒度、黏土粒级稀土元素和重矿物组成特征分析,...北黄海泥质区具有地理位置独特、陆源物质供应丰富、沉积环境复杂等特点,为了更好地理解全球变化背景下对北黄海“源-汇”过程的影响,对北黄海泥质区边缘BS24岩芯沉积物进行了AMS14C测年、粒度、黏土粒级稀土元素和重矿物组成特征分析,以判识沉积物的来源、沉积环境特征,并进一步探讨北黄海的沉积演化过程。研究表明,BS24岩芯轻重稀土元素具有明显分异,稀土元素的球粒陨石标准化配分曲线右倾,轻稀土元素富集,重稀土元素亏损,上陆壳标准化的δEu和δCe无明显异常。稀土元素的变化趋势较为一致,以170 cm为界,上段波动幅度较大,下段含量相对稳定。岩芯中共鉴定出30种重矿物,以黑云母(37.46%)和自生黄铁矿(22.39%)最为常见,辉石和氧化铁矿物及不稳定矿物含量低。黏土粒级及极细砂组分特征指示,BS24岩芯晚全新世以来主要接受黄河物质的沉积。BS24岩芯自生黄铁矿含量的变化可能指示了北黄海冷水团强度的变化。650 cal. a BP以来,北黄海冷水团强度增强,自生黄铁矿含量降低;650~1 560 cal. a BP期间,研究区处于还原环境,北黄海冷水团强度减弱,营造的缺乏对流性环境为自生黄铁矿的富集提供了有利条件。展开更多
文摘The idea of research started with a crazy imaginary theory in the field of astrogeography, saying: We often taught ourselves and then convinced the students that the planet Earth moves despite not feeling the vibrations of traffic, and we listed successive scientific confirmations to indicate the rotation of the planet in a regular movement around its axis once every 24 hours, and it is running in another second movement around the sun once every 365¼ days, so are they only two movements, no more?! Is it possible for him to run at a regular speed in an additional direction?
文摘Based on the study of REE in Mesozoic-Cenozoic sandstones, the paper indicates that Jurassic Fanghushan and Yuantongshan Formations and Lower Cretaceous Zhougongshan Formation have ∑REE of 157 μg·g^(-1), δ_(Eu) of 0.69 and (La/Yb)_N of 11.1, which are similar to the Foziling and Luzhenguan Groups, and it implies that the latter may be the source rocks of the former. The Sanjianpu and Heishidu Formations have high REE concentrations (∑REE=264.8 μg·g^(-1), 328.2 μg·g^(-1) respectively), high Eu anomaly (δ_(Eu)=0.57, 0.67 respectively) and lower Eu/Sm ratios (0.18～0.19), which differs from existent metamorphic rocks in the Dabie Mountains, so where their source rocks came from remains to be studied. The REE features of the Zhengyangguan Formation can be comparable to the Dabie complex and Luzhenguan Group, which shows that the Dabie complex had suffered unroofing in Neocene and constituted the source rocks. Mesozoic sandstones in Huainan area have lower REE concentrations (∑REE=80.9 μg·g^(-1)), high Eu anomaly (δ_(Eu)=0.66) and (La/Yb)_N of 5.7, and it indicates that their source rocks may not come from the Dabie Mountains.
文摘The characteristics of rare earth elements in the Devonian and Carboniferous volcanic rocks were studied in the north Altay. And the mechanism of formation of volcanic rocks were discussed by using the rare earth elements. The correlativity of rare earth elements and major elements shows that the fractional crystallization is undistinguishable during the formation of Devonian and Carboniferous volcanic rocks, and the mechanism of formation of volcanic rocks may be the partial melting. The further study of the relationship of manifold rare earth elements shows that the mechanism of formation of Devonian and Carboniferous volcanic rocks in the north Altay is the partial melting. And the result also shows that the rare earth elements in the Devonian and Carboniferous volcanic rocks inherited the characteristics of those in its source materiels.
文摘北黄海泥质区具有地理位置独特、陆源物质供应丰富、沉积环境复杂等特点,为了更好地理解全球变化背景下对北黄海“源-汇”过程的影响,对北黄海泥质区边缘BS24岩芯沉积物进行了AMS14C测年、粒度、黏土粒级稀土元素和重矿物组成特征分析,以判识沉积物的来源、沉积环境特征,并进一步探讨北黄海的沉积演化过程。研究表明,BS24岩芯轻重稀土元素具有明显分异,稀土元素的球粒陨石标准化配分曲线右倾,轻稀土元素富集,重稀土元素亏损,上陆壳标准化的δEu和δCe无明显异常。稀土元素的变化趋势较为一致,以170 cm为界,上段波动幅度较大,下段含量相对稳定。岩芯中共鉴定出30种重矿物,以黑云母(37.46%)和自生黄铁矿(22.39%)最为常见,辉石和氧化铁矿物及不稳定矿物含量低。黏土粒级及极细砂组分特征指示,BS24岩芯晚全新世以来主要接受黄河物质的沉积。BS24岩芯自生黄铁矿含量的变化可能指示了北黄海冷水团强度的变化。650 cal. a BP以来,北黄海冷水团强度增强,自生黄铁矿含量降低;650~1 560 cal. a BP期间,研究区处于还原环境,北黄海冷水团强度减弱,营造的缺乏对流性环境为自生黄铁矿的富集提供了有利条件。
