APATITE-(CaOH) IN THE FOSSIL BAT GUANO DEPOSIT FROM THE 'DRY' CIOCLOVINA CAVE, SUREANU MOUNTAINS, ROMANIA: DISCUSSION

摘要

The singularity of the mineral assemblage found in the Cioclovina Cave, Romania, has been known at least since 1932, when J. Schadler described the new mineral ardealite, Ca_2(HPO_4)(SO_4) centre dot 4H_2O, and mentioned this cave as the type locality. Extensive studies carried out during the last decade propeled the Cioclovina Cave among the top ten mineralogical caves in the world. The common cave-minerals calcite, aragonite, gypsum, apatite-(CaOH), brushite, monetite, crandallite, and taranakite (Constantinescu etal. 1999, Onac etal. 2002, Marincea & Dumitras. 2003, Dumitras et al. 2004) are accompanied by a number of rare mineral species such as tinsleyite, sampleite, paratacamite or clinoatacamite, churchite-(Y), and foggite (Marincea et al. 2002, Onac et al. 2002, 2005), making an imposing list. Most exciting was the detection of the high-temperature minerals berlinite and ellestadite-(OH) (Onac & White 2003, Onac & Effenberger 2007, Onac et al. 2006); according to the new rules of nomenclature, ellestadite-(OH) is to be used instead of hydroxylellestadite (Burke 2008).