剥蚀

The prograde path was related to the magmatic accretion in arc settings, indicating the existence of an arc setting during the MesoproterozoicNeoproterozoic period. The retrograde near-isobaric cooling path after the peak metamorphism reveals that rapid erosion did not occur and sustained heat supplies from the upper-mantle were maintained after magmatic accretion in the Yuanmou area.

该轨迹的进变质阶段与岛弧地区的岩浆增生过程密切相关，指示元谋地区在中-新元古代期间(1.0～0.85Ga)存在岛弧构造环境；峰期之后的近等压冷却退变轨迹表明该地区未经历强烈的剥蚀，并可能有深部热流的持续供给。

The primary provenance of gold placers are various gold deposits and gold mineralization zones of pre-Mesozic Era.

砂金矿的主要原生物源是前中生代各类金矿床和金矿化体，它们多已风化、剥蚀殆尽，而中生代晚期岩金矿体得以保存

The main contents of the present paper include: 1、The mechanism of fouling accumulation and the effects of fouling and slagging on boiler performance are analyzed. The model of fouling increasing is developed on the basis of sediment rate and denudation rate. The fouling monitoring models for boiler furnace and convective sections based on heat balance, the ones for air heater based on converted pressure difference are given. The implement results show that these models can reveal the cleanliness of boiler heat transfer surface. 2、The disadvantages of the model for boiler furnace fouling and slagging monitoring based on heat balance are discussed, and the calculation of radiant heat flux is considered as the primary difficulty.

主要包括以下内容： 1、分析了锅炉受热面污染形成的机理，从灰污的沉积率和剥蚀率角度出发，推导了受热面灰污增长的基本模型，分析了灰污热阻随积灰时间和烟气流速变化的规律，并通过大量现场试验，得到了沉积常数与时间常数的取值范围； 2、针对炉膛、对流受热面和空气预热器等不同受热面的传热特性，分别建立了基于热平衡和折算压差的污染在线监测模型，经实践验证，其监测结果能够满足现场工程应用的精度要求； 3、分析了基于热平衡原理的辐射、半辐射污染监测模型的不足之处，指出了机理模型因对炉内辐射换热量计算不准确，导致对以辐射换热为主的炉膛和以半辐射半对流的屏式过热器监测效果不够理想。

Is within the flow region, rivers rare, soil essential for the desert soil, and thick bone soil and saline soil; vegetation is extremely sparse shrubs, semi-shrubs, mainly, there are large tracts of land barren; land type is mainly mountainous and desert, erosion stone Gobi, alluvial gravel Gobi and mobile sand.

属内流区，河流稀少，土壤基本为荒漠土、粗骨土和盐土；植被以极其稀疏的灌木、半灌木为主，还有大片土地寸草不生；土地类型则主要为山地荒漠、剥蚀石质戈壁、洪积砾石戈壁以及流动沙地。

It is concluded that the ~(176)Hf/~(177)Hf ratios of 91500, Temora and We-1 were homogeneous, because the aforementioned Hf isotopic results consist of at least seven separated performances of aliquots for each zircon sample. These results have significant implications for zircon Hf isotopic determination by using LA-MC-ICPMS.

上述每个结果包括至少7组独立的锆石样晶的溶解、分离和测定，表明标准样91500、Temora和We-1是Hf同位素组成均一的，可作为LAM-MC-ICPMS(激光剥蚀多接受器电感耦合等离子体质谱)的原位微区锆石~(176)Hf／~(177)Hf比值分析过程中外部校正及监控标准样。

As the cold-dry climate dominated the continental periglacial environment on the Qinghai-Xizang Plateau, the freeze-thaw is not intensified than the other high latitude area on the earth.

青藏高原大陆型冰缘环境的特点使得其冻融作用并不能比其它寒冷地区强烈，因此产生较大风化剥蚀率的原因可能还涉及到盐分作用、辐射作用和其它多种作用等。

Taking Jiyang Depression as the study object, many kinds of disciplines were applied synthetically in this thesis, such as, stratigraphy, structural geology, sedimentology, historical geology, geophysics, etc. On the basis of the reconstruction of the denuded thickness and the original thickness, and the study of the developing characteristics of the basin-controlled faults, combined with the study of space-time distribution of the sedimentary facies and the analysis of basin - transfer mechanism and the geodynamics, the prototype basins of each structural stage in Mesozoic were studied and analyzed in detail, moreover, the superimposed relationship of the Mesozoic basin and Cenozoic basin was discussed.

本论文选择济阳坳陷作为研究对象，开展地层学、构造地质学、沉积学、地史学以及地球物理学等多学科综合研究，以地层剥蚀厚度、原始厚度的恢复以及控盆断层发育演化特征的研究为切入点，辅以沉积相的时空展布研究，并结合盆地转型机制、地球动力学背景分析，对济阳坳陷中生代各构造期的盆地原型进行详细解剖和分析，探讨其与新生代盆地的叠合关系。

Results Malang Sag has two important times uplifting and three times subsiding, while Tiaohu Sag has three times uplifting and four times subsiding.

结果 马朗凹陷主要经历了2个隆起期和3个沉降期，条湖凹陷为3个隆起期和4个沉降期；早、中二叠世两凹陷的沉降幅度很大，沉积速率最大可达133.46m/Ma；晚白垩世的隆起幅度最大，地层剥蚀厚度可达846m。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。