Document qkoxEYO4Ywy5JoyDB0gM9ENEj

PRODUCED BY FORD similar to those of Paakklla, with the exception that anthophylllte has clearly replaced cnstatlte. Relict enatotlte la atlll present, pene trated by needle* of anthophylllte: In addition, ollvlne-bearlng serpen tine, talc, and chlorite have been observed (Aurola, 195$). The anthophylllte aebestoft deposits at Paakklla were first leased In 1907 but not worked to any degree until 1918, when they were taken over by Suomen Mlneraali Oy end operated continuously until production stopped for economic reason* in 197S. Paakklla produced In total 350,000 tonnes of asbestos, of vhlch 230,000 tonnes vas exported (Huuskonen et at., 1980). The asbestos nine and elll at Kaljasalnl was operated contenporaneously by the same company, but the ore was Inferior to that from Paakklla. M1K0R CEOUOCICAL CCeOTRERCSS.OF AMPHIBOLB ASBESTOS Anthophylllte nr.bcstos Small deposits of anthophylllte asbestos have been worked In many localities, but none appToach'ed the Paakklla output of 350,000 tonnes. In the United States anthophylllte has been mined In a number of locali ties, particularly In Ceorgla, North Carolina, Idaho, Maryland, and Massachusetts. Some of the more active mines were the Sail Mountain and Calhoun mines. Sail Mountain, Ceorgla; the Hollywood mine, Habersham County, Ceorgla; the Remlnh mine, Idaho County, Idaho; the Bok Asbestos mine end Albcrton mine, Baltimore County, Maryland; and the Pelham quarry, Hampshire County, Massachusetts. The mode of occurrence of imthophylllte asbestos in these localities Is very similar to that In Paakklla and Haljasalmi, Cast Finland. Typically these anthophylllte dcporlta ore found In metamorphosed ultromoflc bodies, generally aerpenClnlzcd and anphlbollzed dunltes and harzburgltes caught up ss Inclusions within the country rock achlsts and gneisses. In localities within tho Appalachian Orgenlc belt, metamorphism la regional and repeated; in Fnnlah, Idaho, mueh of the metamorphlsm was accomplished by the lntrur.lon of the Idaho bathollth. Cranltie Intrusions are noted In some localities and may have contributed to the metamorphlsm, particularly In regard to supply of heat, SIO^, and It^O. The Ramlah deposit (Anderson, 1931) is particularly interesting In 794 8005 0058 Its similarity to the Finnish deposits. Here also the ultrnmafle lenses (dunltes and harzburgltes) are Included within mica achlets end gneisses. Anthophylllte clearly replaced olivine and enstatltc, for needles grew Into the relict grains. In addition, anthophylllte replaces nntlgor- lte, the antigorlte having previously replaced olivine. Talc Is a minor constituent In the Ramlah deposit but replaces anthophylllte, antigorlte, and olivine. The various assemblages observed at Ramlah, Paakklla, and . Kaljasalml can ba explained with the phase diagrams suggested by Hemlcy tt at. (1977), three of vhlch ere shown In Figure 6, 33 rc 1 r oi i An /an TC 7 oi i f/m tc ' OI /AT / ICMKtMUU - Httm S. FnsMl So* rslactom 1, tW sum UMWj-r 1 (Mr at at*, 1111). W - aaatitlt*. SS - antSetfrlltt*. AT - antlcartt* (uml<a), OL ettatna. K talc. Smfaatat taaeclaaa Mefc coalt acea* at Invar ar tilth,r *Uy li. I. or arai W - A* -.*>. 01. - *a(S.). . AT fS.f AT - 1C OC). AS -- 1C (t.M. *.action at lawar hjO anl,: Ot * 1C S.D. taaetlna at Vl|t*r t*jo anlyi A1 - AS Ctl. S - SalJaaalal. rtalants P - Paattlla, rinlantt K - baUS, Idaho. Tremollte asbestos Although there are numerous references to tremollte snbeotoe In the literature, relatively little of thle fiber entered the vorld market. Probably the most famous reference to tremollte asbestos Is to that from the Italian Alps, reportedly the aebeatoe of the Romans. Inquiry Into this, however, leads ono to believe that moat of the asbestos fiber from the Alps was chrysotlle, not tremollte,^ Flbrofas tremollte has not been reported In the recent end extensive literature on metamorphosed ultrasafle rocks from north Italy, vhereae chrysotlle la often mentioned. Also, In a letter to Oliver Bovlea, aabestos commodity specialist, U.S. Bureau of Mlnea (Bowles, 1937, p. 6), the chief mineral inspector In Rone stated In parti 79$