OH-defects in multiple-doped orthoenstatite at 4-8 GPa: filling the gap between pure and natural systems [0.03%]
4-8GPa下多掺杂斜方镁钙硅石中的OH缺陷：在纯系统和自然系统之间的空白中寻找答案
Roland Stalder,Asiya Karimova,Jürgen Konzett
Roland Stalder
OH-defects in orthoenstatite were studied experimentally between 4 and 8 GPa at 1150 °C in the system CaO-MgO-Al2O3-SiO2-Cr2O3-Na2O, leading to phase assemblages enstatite ± forsterite ± diopside ± garnet. In enstatite coexisting with g...
Hydrothermal alteration of kimberlite by convective flows of external water [0.03%]
外部水对流对外 Kimberlite 的热液改造作用
A A Afanasyev,O Melnik,L Porritt et al.
A A Afanasyev et al.
Kimberlite volcanism involves the emplacement of olivine-rich volcaniclastic deposits into volcanic vents or pipes. Kimberlite deposits are typically pervasively serpentinised as a result of the reaction of olivine and water within a temper...
Experimental partitioning of halogens and other trace elements between olivine, pyroxenes, amphibole and aqueous fluid at 2 GPa and 900-1,300 °C [0.03%]
橄榄石、辉石、角闪石和水溶流体之间在2GPa和900-1300°C时的卤素和其他微量元素的实验性分配研究
Alessandro Fabbrizio,Roland Stalder,Kathrin Hametner et al.
Alessandro Fabbrizio et al.
We present new partition coefficients for various trace elements including Cl between olivine, pyroxenes, amphibole and coexisting chlorine-bearing aqueous fluid in a series of high-pressure experiments at 2 GPa between 900 and 1,300 °C in...
Tourmaline mineralization in the Barberton greenstone belt, South Africa: early Archean metasomatism by evaporite-derived boron [0.03%]
南非巴伯顿绿岩带电气石矿化：由蒸发岩脱气形成的早太古宙硼交代作用
G R Byerly,M R Palmer
G R Byerly
Tourmaline-rich rocks are common in the low-grade, interior portions of the Barberton greenstone belt of South Africa, where shallow-marine sediments and underlying altered basaltic and komatiitic lavas contain up to 50% tourmaline. The pre...