Electron microscopic study of the composition, the microstructure and defects of natural dense hydrous minerals and of phases that crystallize from high density fluid inclusions in diamond.

超深源金刚石中的包裹体使人们对软流圈的局部化学成分有了独特的认识，过渡带甚至下地幔，从而进入全球的运输过程和再循环机制，从Juina地区（巴西）的大部分研究样品显示出在过渡带内起源的证据（410- 660公里）或地球的下地幔（> 660公里）（Harte und Harris，1984; Stachel等人，2000 b; Kaminsky等人，2001; 2012，Brenker等人，2005，2007; Harte，2012，Walter等人，2011年，Pearson等人，2014年，Bulanova，2010年）。在过去的几年里，在所谓的超深钻孔中发现了两套不寻常的包裹体。这些显示了流体或流体输送的出现的证据（例如，具有高达1.4wt%水的含水Ringwoodite，Pearson，Brenker等人，2014; Phase EGG，Wirth等人，2007），另一方面是沉积物部分（z.B. Phase EGG，Wirth等人，2007; CF-相+ K-Hollandite + SiO2，Bulanowa等人，2010年）下降到地球地幔的过渡区。对这些含水致密高压矿物的研究，从高密度流体中结晶出来的致密含水矿物和相，能够从它们各自的源区获得地球深部地幔中流体的化学成分，以及形成和后来折返过程中的物理化学条件。原位技术产生大量的同生流体组分，几种致密的含水矿物（例如，Phase Egg，Wirth等人，. 2007）和含水矿物（例如含水林伍德石，Pearson等人，2014）。将对这些发现的化学成分和晶体结构进行详细研究，以获得有关独特样品形成和剥露过程中条件的更多信息。主要重点将是对样品的TEM研究。这将包括研究沉淀物，出溶，变形，以及相变，如堆垛层错和反相域。

Inclusions in diamond with super deep origin enable unique insights into the local chemical composition of the asthenosphere, the transition zone or even the lower mantle and therefore into the global transport processes and recycling mechanism.A large part of the studied samples from the Juina area (Brazil) show evidence for an origin within the transition zone (410-660km) or the Earth´s lower mantle (> 660km) (Harte und Harris, 1984; Stachel et al., 2000b; Kaminsky et al., 2001; 2012, Brenker et al., 2005, 2007; Harte, 2012, Walter et al., 2011, Pearson et al., 2014, Bulanova, 2010).Within the last years two unusual suites of inclusions in so called super deep diaomnds were recognized. These show evidence for the occurence of fluids or fluid transport (e.g. hydrous Ringwoodite with up to 1,4 wt% water, Pearson, Brenker, et al., 2014; Phase EGG, Wirth et al., 2007) and on the other hand for sedimentary parts (z.B. Phase EGG, Wirth et al., 2007; CF-Phase + K-Hollandite + SiO2, Bulanowa et al., 2010) down to the transition zone of the Earth´s mantle. The investigation of these water-bearing dense high pressure minerals, dense hydrous minerals and phases that cristallize from high density fluids enables to acquire the chemical composition of fluids within the deep Earth´s mantle from their respected source region and of the physico-chemical conditions during formation and later exhumation.The diamond samples studied during a preproject by the means of non-destructive in-situ techniques yield a high amount of syngenetic fluid components, several dense hydrous minerals (e.g. Phase Egg, Wirth et al,. 2007) and water-bearing minerals (e.g. waterbearing ringwoodite, Pearson et al, 2014). These findings will be studied in great detail for their chemical composition and their crystal structure in order to get more information about the conditions during formation and exhumation of the unique samples.The main focus will be on the TEM investigation of the samples. This will include the study of precipitates, exsolution, deformation, as well as phase transformations, like stacking faults and antiphase domains.