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中国科学院广州地球化学研究所邹宗琪等-JGR-SE：交代地幔的锆同位素组成（图）
邹宗琪 锆同位素 地质
2024/5/21
在地球的形成与演化过程中，地幔的化学组成随着相应的地质事件和地质过程发生改变。这意味着地幔及其派生熔体的地球化学成分记录了大量的地球演化信息，是地质学家了解地球的形成与演化的重要手段。其中，地幔交代作用对地幔的矿物组成以及地球化学成分的改造均有重大影响。因此，限定地球化学指标在地幔交代过程中的行为及交代地幔的地球化学组成，是利用该指标的基本前提条件。
作为消失的大洋岩石圈的残余，蛇绿岩潜在地记录洋盆从出生到死亡的生命周期——威尔逊旋回。形成于不同构造环境的蛇绿岩，比如，洋陆转换带（OCT）、洋中脊（MOR）及俯冲带（SSZ），可以联合起来反映威尔逊旋回从开始到结束的（开启、扩张、闭合）完整演化历程。而且，以上不同类型的蛇绿岩在它们的岩石组合与地球化学组成上也表现出系统的变化，这与不同地球动力学背景所控制的地幔熔体抽取、岩石圈物质再循环以及地幔熔...
可变形板块运动和地表动力地形是板块与地幔耦合的重要指示标志。东亚陆缘（图1）深部以地幔过渡带内发育大型水平板片为特征。然而，这一特征的板片结构是如何演变的、它又如何与板块运动、板内变形和动力地形相耦合，人们对其知之甚少。
Re、Se是中国急需的紧缺矿种,对国家的资源战略与环境安全保障具有重要影响。新疆伊犁盆地511矿床在开采铀的过程中,发现了Re、Se和Mo等元素存在富集的现象。文章以511矿床7号采区为例,采取野外地质调查与室内分析测试及综合研究相结合的技术路线,以探求Re、Se、Mo等元素的分布特点及其与U元素富集之间的关系。研究表明,Re和Se在空间上与砂岩铀矿体密切共生,说明在511矿床中矿源等条件具备的情...
The mid-Frasnian subsidence pulse in the Lublin Basin (SE Poland):sedimentary record,conodont biostratigraphy and regional significance
Frasnian Lublin Basin Conodont biostratigraphy Subsidence Pripyat Graben Rifting
2009/10/20
Most of the thickness of Frasnian sediments in the central segment of the Lublin Basin, i.e. up to 300 metres, is represented by a single transgressive-regressive Cycle VIa, developed in the carbonate...
Roveacrinids from Northern Arabian Plate in SE Turkey
crinoids roveacrinids systematics cenomanian Turkey
2009/7/8
Crinoid remains from Cenomanian limestones in SE Anatolia have been studied. These crinoids belong to the family Roveacrinidae and are characterised by their lacking a stem and free living above the s...
Alpine Metamorphism and Granitoid Magmatism in the Strandja Zone: New Data from the Sakar Unit, SE Bulgaria
Strandja zone Sakar unit Alpine tectonics syntectonic granitoids structural geology
2009/7/7
The Strandja Zone is a pre-Cenomanian orogen consisting of three tectonic units: the Veleka, Strandja and Sakar units. The first two units display very low-grade Alpine metamorphism, whereas in the S...
Environmental Impact and Drainage Geochemistry in the Vicinity of the Harput Pb-Zn-Cu Veins, Elazığ, SE Turkey
drainage geochemistry REE stream sediments spring water Elazı ğ Turkey
2009/7/7
The aim of this study was to examine the environmental impact of major, minor and rare-earth elements (REE) in spring waters and major and minor elements in stream sediments proximal to known vein-ty...
Lake Hazar Basin: a Negative Flower Structure on the East Anatolian Fault System (EAFS), SE Turkey
East Anatolian Fault System Lake Hazar basin negative flower structure Turkey
2009/7/7
The East Anatolian Fault System (EAFS) is a 30-km-wide, 700-km-long and NE-trending sinistral strike-slip megashear belt between the Anatolian platelet in the northwest and African-Arabian plates in t...
The Influence of Local Sources on the Mineral Content of Bulk Deposition Over an Altitudinal Gradient in the Filabres Range(SE Spain)
Influence of Local Sources Bulk Deposition Altitudinal Gradient the Filabres Range SE Spain
2011/11/11
The Influence of Local Sources on the Mineral Content of Bulk Deposition Over an Altitudinal Gradient in the Filabres Range(SE Spain).