Re os dating arsenopyrite
The crystal habit, hardness, density, and garlic odor when struck are diagnostic.Arsenopyrite in older literature may be referred to as mispickel, a name of German origin.
This work has resulted in major advancements in the direct isotopic dating of crustal sulfide minerals, petroleum source-rocks, and natural hydrocarbons, using Re-Os isotopes.Being the main compound of arsenic, the trioxide is the precursor to elemental arsenic, arsenic alloys, and arsenide semiconductors. feed additives (Roxarsone) and pharmaceuticals (Neosalvarsan), are derived from arsenic trioxide.Bulk arsenic-based compounds sodium arsenite and sodium cacodylate are derived from the trioxide.Arsenic trioxide can be generated via routine processing of arsenic compounds including the oxidation (combustion) of arsenic and arsenic-containing minerals in air.Illustrative is the roasting of orpiment, a typical arsenic sulfide ore.The Mount Pleasant granite-related polymetallic deposit, located on the southwestern margin of the Late Devonian Mount Pleasant Caldera Complex in southwestern New Brunswick, contains a significant resource of tin, tungsten, molybdenum, zinc, indium, and bismuth.
The Caldera Complex comprises Intracaldera, Late Caldera-Fill, and Exocaldera sequences, and associated subvolcanic granitic rocks.
We used Re-Os arsenopyrite geochronology to precisely determine the age of main-stage gold mineralization at Muruntau to be 287.5 ± 1.7 Ma, which overlaps the emplacement of proximal post-tectonic granitoid magmatism.
Additionally, we suggest that arsenopyrite growth may have occurred over an interval of at least 2 m.y.
With 46% arsenic content, arsenopyrite, along with orpiment, is a principal ore of arsenic.
When deposits of arsenopyrite become exposed to the atmosphere, usually due to mining, the mineral will slowly oxidize, converting the arsenic into oxides that are more soluble in water, leading to acid mine drainage.
Re-Os isotopes natural hydrocarbons are directly related to source-rock Re-Os isotope character and in some cases Re-Os geochronology of hydrocarbons is possible.