Distinct Depositional Environments Of Two Internal Reference Materials With Marine Sediment Matrix From Nearby Bangka Island

Abstract

Internal reference materials are generated by laboratories to overcome the high cost and limited matrix of certified reference materials (CRM). Rare earth elements (REE) are strategic metals which is used in modern technology and explored within different matrices. Rare earth elements exploration surely needs appropriate reference materials for accurate interpretation. The current study aims to explain internal standard reference materials generation of marine sediment matrices from nearby the tin Bangka Island, especially the rare earth elements character, to overcome the CRM dependency. The first sample was taken with a dredger while the second one using a suction vessel. Repeated samples measurements were done by applying inductively coupled plasma - mass spectrometry (ICP-MS) from the Center for Geological Survey Indonesia for repeatability tests. The samples were analyzed in another certified laboratory in Indonesia using the same device for reproducibility assessment. The two candidates should be deposited in different environments with different influx material due to their distinct rare earth elements characters. Most of the analytes’ contents are suitable to be set as internal reference material values according to acceptable repeatability and reproducibility evaluations. The internal reference materials are ready for studying suitable matrices in the future.

Geochemistry Signature and K-Ar Age of the I-type Granite at East Coast of Bangka Island

“…As discussed above, Bangka Island belongs to the tin islands along with Bintan, Singkep, and Kundur (Ko, 1986;Ng et al, 2017;Irzon et al, 2022). A previous study illustrated that the stanniferous S-type granites in Bangka intruded during Triassic, are characterized by south-westward younging which might be the result of subduction roll-back (Ng et al, 2017).…”

“…Barber and Crow, 2009;Metcalfe 2011Metcalfe , 2013Hall and Sevastjanova, 2012;Cottam et al, 2013;Breitfeld et al, 2017;Ng et al, 2017;Hazad et al, 2019;Irzon et al, 2021). Classification of granitic rocks of Southeast Asia into Eastern, Main Range, and Western Provinces is based on continental blocks convergences with several ancient oceans called Palaeo-Tethys, Meso-Tethys, and Ceno-Tethys (Barber, 2000;Barber and Crow, 2003;Metcalfe, 2011Metcalfe, , 2013Jiang et al, 2017;Irzon et al, 2022). The detachment of North China, South China, Indochina, and East Malaya Blocks from the mainland Gondwana through Early Devonian opened the Palaeo-Tethys (Metcalfe, 2011).…”