The origin of rutile-ilmenite aggregates (“nigrine”) in alluvial-fluvial placers of the Hagendorf pegmatite province, NE Bavaria, Germany

Geogene and anthropogenic controls on the mineralogy and geochemistry of modern alluvial–(fluvial) gold placer deposits in man-made landscapes in France, Switzerland and Germany

“…Moreover found mineral assemblages yielded information on the industrial history of some parts of Europe (metallurgy, smelting, manufacturing). The mineralogical tracers are investigated in context with grain-related parameters such as morphology, grain size and accessory minerals in gold aggregates, a method which has proven successful in describing the placer evolution of Ti and Sn placers (Dill et al, 2006(Dill et al, , 2007a(Dill et al, ,b, 2008.…”

Deposition and alteration of carbonaceous series within a Neotethyan rift at the western boundary of the Arabian Plate: The Late Permian Um Irna Formation, NW Jordan, a petroleum system

“…Jarrar.). Rutile can hardly be attributed to a definite source rock, but its niobianenriched member clearly points to pegmatitic affiliates (Dill et al, 2007a). The debris of the Um Irna Formation derived from the youngest felsic intrusive rocks of the Arabian Shield (Fig.…”

Mineralogical and chemical distribution patterns of placers and ferricretes in Quaternary sediments in SE Germany: The impact of nature and man on the unroofing of pegmatites

“…We prefer the term nigrine to ilmenorutile, because there is one characteristic feature common to all Ti oxide aggregates, the dull black luster. Based upon rutile-ilmenite zonation, exsolution lamellae and intergrowth, microchemical data such as Nb, Cr, Ta, V, Fe, W and Sn contents and mineral inclusions, five different types of Ti oxide aggregates/nigrine have been established (Dill et al, 2007). Type A1 and A2 nigrine aggregates only contain wolframite, while type B1 and B2 aggregates have additionally inclusions of columbite s.s.s., pyrochlore s.s.s, sphalerite, pyrrhotite and Fe oxides.…”