Origin of bluish pectolite aka larimar from the Dominican Republic: Constraints from mineralogy and geochemistry

Highlights: • The mixing of volcanic and meteoric waters gave rise to larimar formation. • Larimar crystallized under low-temperature conditions <170 °C. • Temperature drop and boiling conditions favored the precipitation first green, then blue and white pectolite. The commonly known larimar is usually a gem-quality, bluish pectolite, intergrown with other associated minerals such as natrolite, prehnite, calcite, chlorite, found only in the Dominican Republic

Application of remote sensing for detection of tectonic structures and localisation of ore deposits within Biryusinsky and Krepsky-Tumanshetsky ore clusters (Eastern Sayan)

As a result of decoding of the materials of the Russian space survey “Resource-P” (ShMSA) on Biryusinskaya area, the features of the tectonic structure of the horst-anticlinal uplifts and the graben-synclines separating them were determined, the large role of sublatitudinal disjunctions was shown in the structural diagram of the area under study, ore prospective sites were isolated. The study of the Krepsko-Tumanshetskaya area was carried out using space multispectral and panchromatic high-resolution surveys “Resource-P” (Geoton), which made it possible to determine the structural position of the ore deposits. On the Krepsko-Tumanshetskaya area, the ore-controlling structures are small along the length of sublatitudinal strike faults and the nodes of their intersection with the northwestern and northeastern disjunctions.</jats:p

Application of remote sensing for detection of zones of cataclastic and metasomatic rocks on the area of the Uvatsky ore cluster (Eastern Sayan)

Interpretation materials of the Russian space survey «Resource-P» (Geotone) in the visible and infrared bands made it possible to identify crush belts and faults of the northeastern, sublatitudinal and submeridional strike that determine the structural position of uranium mineralization within the Uvat ore cluster in the East Sayan. The principal possibility of using a high-resolution multi-zone space survey (3 m) for detecting metasomatically altered ore-bearing rocks of the Lower Proterozoic and Riphean-Paleozoic carbonate-terrigenous deposits was determined.</jats:p