Glow discharge mass spectrometry studies on nephrite minerals formed by different metallogenic mechanisms and geological environments

Origin of serpentinite-related nephrite from Jordanów and adjacent areas (SW Poland) and its comparison with selected nephrite occurrences.

“…10). The Fe/(Fe + Mg) ra tios of 0.084 and 0.093 are sim i lar to the ser pen tin ite-re lated neph rite type val ues pro posed by Siqin et al (2012) -the Fe/(Fe + Mg) ra tios above 0.060. In ad di tion, the bulk-rock trace el e ments also corre spond with the ser pen tin ite-re lated nephrites, based on Cr and Ni con cen tra tions (Fig.…”

“…Se lected char ac ter is tic fea tures of the ser pen tin ite-re lated and do lo mite-re lated nephrites com piled from pub lished data and our anal y ses Yui et al (1988);b -Yui and Kwon (2002); note: b -de tailed study of do lo mite-re lated Chuncheon neph rite (many anal y ses), b' -com pi lation of sin gle anal y ses from sev eral ser pen tin ite-re lated and do lo mite-re lated neph rite de pos its (other than Chuncheon), both from the same work, for de tails see also Fig ure 11;c -Grapes and Yun (2010);d -Liu et al (2010);e -Liu et al (2011a);f -Liu et al (2011b); g - Kostov et al (2012), data with out Jordanów neph rite, dis cussed ex ten sively in pres ent pa per; h - Siqin et al (2012), Cr, Ni and Co re cal cu lated from wt.%; i - Adamo and Bocchio (2013);j -Ling et al (2013); k -pres ent study of com pa ra ble ma te rial from Crooks Moun tain and New Zea land nephrites, for de tails see Ap pen dix 2 val ues be tween -124 and -56‰ (Yui and Kwon, 2002;Liu et al, 2011a, b;Adamo and Bocchio, 2013). Nephrites in the GJM were in ter preted as ser pen tin ite-related (ortho-neph rite), due to their oc cur rence within a ser pentin ite mas sif (Maciejewski, 1966;Gunia, 2000;Harlow and Sorensen, 2005;Middle ton, 2006;Łobos et al, 2008).…”

“…The vari ation of FeO (ppm) vs. Fe/(Fe + Mg) (Siqin et al, 2012) of the two Jordanów neph rite anal y ses (per formed by dif fer ent meth odsthe prompt-gamma ac ti va tion anal y sis, PGAA; Péterdi et al,466 G. GiI, J.D. Barnes, C. Boschi, P. Gunia, G. Szakmány, Z. Bendő, P. Raczyński and B. Péterdi …”

“…The larg est neph rite de pos its are lo cated in Brit ish Co lumbia (Can ada; Simandl et al, 2000;Makepeace and Simandl, 2001), Wy o ming, Cal i for nia, and Alaska (USA; Sinkankas, 1959;Sherer, 1972;Middle ton, 2006), Si be ria (Rus sia; Sorensen, 2001, 2005;Łapot, 2004;Kostov et al, 2012), Xinjiang, Qinghai, Liaoning, Jiangsu, Sichuan and Henan (China; Liu et al, 2010Liu et al, , 2011aSiqin et al, 2012), Chuncheon (Ko rea; Yui and Kwon, 2002), Hualien (Tai wan; Wan and Yeh, 1984;Siqin et al, 2012), South Aus tra lia and New South Wales (Aus tra lia; Aitchison et al, 1992;Sorensen, 2001, 2005), and the South Is land (New Zea land; Middle ton, 2006;Ad ams et al, 2007;Grapes and Yun, 2010). There are also neph rite de pos its in Eu rope -Sondrio (It aly; Adamo and Bocchio, 2013), Scortaseo (Swit zer land; Dietrich and de Quervain, 1968;Adamo and Bocchio, 2013;Péterdi et al, 2014), Thuringia and Ba varia (Ger many; Łobos et al, 2008;Péterdi et al, 2014), and Usinmaki and Pakila (Fin land;Gunia, 2000).…”

“…Am phi boles NiO and di op side Cr 2 O 3 are also char ac ter is tic (both higher in ser pen tin ite-re lated nephrite; Ta ble 1), but un for tu nately, NiO is usu ally not in cluded in stan dard neph rite am phi boles elec tron microprobe anal y ses. Ser pen tin ite-re lated nephrites tend to have bulk-rock Cr concen tra tions be tween 900 and 2812 ppm, Ni be tween 959 and 1898 ppm, and Co be tween 42 and 207 ppm, whereas do lomite-re lated va ri et ies have lower Cr con cen tra tions, be tween 2 and 179 ppm, Ni be tween 0.05 and 471 ppm, and Co be tween 0.5 and 10 ppm (Ta ble 1; Grapes and Yun, 2010;Liu et al, 2011b;Kostov et al, 2012;Siqin et al, 2012). Siqin et al (2012) shows that ser pen tin ite-re lated nephrites have bulk-rock Fe/(Fe + Mg) >0.060, whereas most do lo mite-re lated nephrites are <0.060, al though there is some over lap and some do lo mite-related nephrites also have a Fe/(Fe + Mg) ra tio >0.060.…”