日高山脈南部目黒地方の変成帯に関する研究（第6報）
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(2) 1?. ^r^^-l-'^to ^NB^. TO42^ 9 ^. C^-itfRB). Biiisiumagntt^fflm^KHT^^ (^G%) ^. ^. Studies on the Petrography of the Metamorphic Belt at the Meguro District in the Southern Hidaka Mountains, Hokkaido (Part 6) Yono TONOSAKI Mlneralogical Laboratory, Hakodate Branch, Hokkaido University of Education. suited oM-jffJBM^ y'^^^ h-^^-c, ^^^&^^fj^J:^^fflo^;§^M^, ^oft E^WftM, ^-^lA4^^^A?^^^?^^M%L-CJBt!(^,,I^T^^ Wlf, 1964-1966). ^^r^^^^^JB-^oa^^, %?z£^D<, S^-r^^Ltl^, ^S1t?tH^ 5 yL^m^WM •^W.-t^^^b^h^. ^m^ Gefiigeregel O^^m. ^3^, ^IJ^^^O^^^-^^ ^h, ^ ^-mte^T^^ ^^T%. ^^^^1^5^^. m^L, ^m^^y-^^^ ^-^w^^w^m^ ^i'-r?z£^"r^)/s.. iii) rMmlE ^Diorite-Porphyry-). -4:^±Sii?±W 703m <D?WS. Gt^H^fO ^ MffiL, ^^-^®,y-7^< h^J^S^^^X^^^^;5. J&{?, -^Mlllg/^ 10m |tfjf^(C-C, ^M^OT^I^^, ^ ^ NS ^i±^7T. L-C 1^-5. ^r^^rr^ic LT^^^^^^-,. T^, -^H^^M^^ilLi^ ^T^^, gs%^ <D , ^--7 ^ ^ hg3 b wij^m^-t ^^^ ff^ ^ ^. JM. (iRtRafe^U?%?^M^WJEr^?/5. Biotite^ m 1 ^ rAWI^C^;5^^»0^*J:b (i|i^ Vol. %) YT 2366 Plagioclase. YT 2367. 72.2. 64.3. Quartz. 9.8. Biotite. 19.0. 7.1. 12.8. Cummin gtonile. 9.3. 3.4. 1.1. 0.3. Chlorite Magnetite. 0.5. 0.2. sal. t^tal. 82.0. 83.3. fern. total. 18.0. 16.7. Total 100.0. 100.0. 1 m FAWIJ& (SWYT2367) 0|. § ^ftS ^ 7 - ^TO^: <i:. r^t^^y-ci\ PI: (piagic-. YT 2366 : Fine-grained rock. close'), Qt: ^^ (^Quartz'), Ho: ^[. YT 2367 : Coarse-gralned rock. WM~G (Cummingtonite'), pl 3^ 3^--. (43).
(3) H ?WRM § M^^o^^^^M-t-SW^ plagioclase b (D^?ff^M^ ^ ^Bt^JI h^ % ff\ yc^ !?'7)^%fA@d^lJr^->' < |W,;t (•%. ^mw^\. ^^t /6 ^, ^^ plagioclase • quartz • biotite t^ ^^ h^^ ^ ^ -S ^, ^^z i^O $ -^ plagioclase. ^-^W^^^^t^, ^?W?J^<^L^/6G|l[»M). M/f?&?r^, ?1^ ?, (YT 2366) ^ffi^ (YT 2367) ^ OM^I'^^J^ L^c^, -k^^^t^l ^^TT; L -c & /6. ^A^boM^I-^ <£ % <^, ffi^^^i;E[|^^rj:b"<, plagioclase 0?®^ ^ quartz . biotite <D^ -)Mbff^±^t^m^^^^. ^0»^t, ?MJ?4:1-?, quartz^7°-/l/^^ifBJ±|L, biotite. ff^m^^ir^^-^^^< ^o^-^. Plagioclase : c ^^OJ^L^ <, L < ^B^ B3B^ ^ ^^ i^^ L, ^®^ J; ^ ^jimt^ h^ IQO^'W^H^-^I^. XlBft?S^^?tL, -eo^^r^, 7/1.-'^ h-^^/l/^..-K'O. ^^mffWM^^^^^lMW. ^^f^^^T^^4)^L<, ' ^S^^ot?. ^^<^T^-6. X'^BBE)0-(^"^ ^2^ |3AW^I^at4X^O^^^iBB®^^W^ •^. Jeo^^^XU5£L^^, f@f^^ M^<7^!1?M'T'L^-^L X tt 1- /^. ^6^ 9. ^. ^^'^?•?^^'^2^=-. d. ^;LT^%. TO;i?0.6mmX0.3mm, <?:. T. 2.0mmX1.6mm, -\t|g®±OjS^T^. m x. Ml =74°. /?i=35° As =5°. z. ^2 =342° »3 =246°. /?s=56°. x. Ml =100°. Ai=35°. Y. Y. n^=1.550(^^)S^J: -6. »^.J^20°C),. z. ^A^ (+)2V=88°~82°, '^^^ A-^trace. (a. -I. Cfq. of 010 cmax.^ in zone J_ 010 (in albite law). 0. =(+)26°. ^Wmm X-Y-Z b (010) 0. m f4 ^. 3. x Y. ns =8°. h,=7°. »3 =268°. /<8=33°. Hi =66°. Ai=33°. HZ =334°. z. Hg =237°. 0^1 b OWif -X'"010=82°, r"'010=64°, Z^OIO. =27°; '|ffii?^N L, An47<t^0basic andesine. ^ffi^T%. ^/^±, plagioclase <D^?m^^ L^j^-t. ^. V°-^?tb^^, ^^^^^K. mo^?^m^ L-t i - ^ . ^^^^1-. J=7° N. (+)2V=82°. J=8° N. (+)2~r=88°. J=13 °N (-)2y=86°. /?3=58°. i?lr^* ^~ ^ ^" 1Crystal. Grain-size (mm.). Optical angles. 1 2 3 4 5. 0.3x0.2. 80°. 0.09x0.06. 82°. 0.12x0.09. 78°. 0.15x0.09. 84°. 0.08x0.06. 84°. No.. Quartz : -7 - ^ ^ . |»^ ^ /^ T /^s ^ Bl 0 ^. h=y. Remarks. W2V^. ^7^-t. Biotite: ,^Jt^0B (0.5mmX0.2mm) ^^ht^{'), plagioclase (D^^^^^-f-. -6. ^-t?^SJ 0^ 1.6mmX0.7mm) ^^^^, ft!llAt/^ tt^A L^W^iH, ^ ^ % . ^ ^'18®^ ^=yellow, y=yellowish brown, Z=reddish brown. (001) ]S±<^M^^ r'=1.636.. Cwnmingtonite : ^^^^(r)^. ^ ^^ ^ ^-t. Biotite ^r^^ ^ ^, ^ ^ ^-Uz ^ ^T^R3B ~^t^. —|$^ plagioclase (D^^iL^^X < BBil±i L^:l ^ . Retardation 575 m/-(, ??^f^ r-a-. -0.025 (^ v^v^-^-^l^mmm). ^?l^o^?^i^3^r^f-r^%. -/fi^^c^z. =23° on (010), ^NAiE {Z'\ ^{Wm^fe-tefa, ^fate^^<. iv) ^j^ ^Amphibolite) W^^m^ (V) 0?MB&0 (^4g|) ^L-C^^J;$^, -eo^^i^, I£t^,^'-7 ^< h ^Jtff^X ^'^"-7^< h <ii^^Hj<s^-6. ^WOM^^, ^^'N 70°W^^Of,. ±^^;9, i^m^-^h^mwt^m^^^^^.^^^. L^^, *^rA^-^^ -^\^<DW^^^ $ ^ ^ d, ^^^W^'^t^- h to '9 ^ /5 (W. 1956).. nts, ^--7 ^ < h <hM-^J5-M ^ ^"-^ ^ < ^ ON^'^^^^^'6, ^-H^-'^O^F^^^m^ L. (44).
(4) ^ lit -^ ^. ^<h^6, ^(ow, i£/'tect<wotM?^?, ji6-<^m^^^^^^e>^^, ^^^^, 11r^^, ^'y-^-r Kk?^^^(^^^^?glt)oM?^^^^^^l^L^^^%a^ffi^T^^ ooj; $^^. -?:^^^^^^jS^nN^^r^-t^^^o^E^L-r&5^<):^L^. A) H1S?$/7"7^ h'+'O^^^. wm^wm\^wt^w^ cm^6^ somrrio^^&i^^x) ^igff^^' ^"-7 3?^ \-^-^/ p^n^^/h^. is^^^^^x^-^, ip§^5m$^H^, ^^ 5cm ^ 20cm. ^o^^t^f^^Bmi^c^r^zxi^. ;^(aUC^, -UZ^I. TO ^, m^w . J; ;; M^f. ff^m^^^ ^. :L^l^. ^. mJE^-^:?;6. >m®o7^®j. ^-^•t^^kts: <, -eo^:^, ^'. ^"-7^< \-^(oi^. m^^wm^. ^^mm^-t ^o^x^.. w^^mM. 1?^W^{? a^wxJE% ^bts.^. ^Zt^. ^1<, JE^Eto^ SN^^T-t^)^. wmw^bh ^>ff\ ^6Dff^J. ?^MJr, R^ ct ^^m. 0^fc/£^^. WWM^. ^Ljmis^x^. ^^. WWh. ^^Wt^^ SMM^It-t %^, ^W4o|K. /t^M4^^.^;T. M;^:tt?^^. 12 El d) ^irc^-^-f h4^?. fa^rATOt^ ^w^ww^>!-bWM. (2). (3) jtm^' y'-^^^ v^oM^w. fK). (2) ??WW^^ (3) JH»WW^ ^Wmm^m-^. Pl: /f4A^ ^Plagloclase'), Ho: M^FATC (Hornblende),. Py: ^Auglte), |g^ 3/1.. (45).
(5) s Kwm § a^^®^^^^M^ -s w%. T%. i^m^w^^^, ^f-Nr^w. u?^ y-^ ^^ \~^w^h^fi. m^www ^w vol. %). Ma^-H ^ ^ ^ ^ ^ % ^, IS^o^X^^ff^^. ^ h^^wm^ h^ cm 2 mo i HRS). ^p^ b, ^h^n< fteM« h o&^Mfj^. fctfititT^.. Melanocratic. layer (2040). Leucocratic. layer (2040). Homblende. 88.8. 27.4. Plagioclase. 5.4. 67.5. Quartz. (a) ^m^S&m Amphiboles : ^;|£t^% L ^ ffe^^ ^ (7) HSB ^. ^^;5(ig2iziomm). ^isi^i^mff^. Apatite. Blf^Mllg^^^fefk L, h ^ ^ green hornblende. film. t^tal. -f'gfe^'tiu^^, ®[±i®?^'t%g|^-m, ^. ^W^-t^W^^^^.. 1. 677. ^?^\^1 ^W^^WUm 5 Er^T b ^ i) ^-^ %. -x^e^^fi: c-^z' = 20°-. 16° on (110), c"SZcmaxQ=22° on (010), b=r,. II (010), ^X^o^&IE (^/), ^fe. 0.2 2.9 4.9 5.4. 69.7. 94.6. 30.3. 100.0. 100.0. sjl. t^tal. Brwon hornblende (t^^^ c ?X, ^^^fS ^iD^^m^^^-t^. jS^f^ r'= 1.680-. 0.7. Magnetite. Total. 0. 5 mmXO. 2 mm, (HO) • (110) ON®^^^I^W. 2.2. Biotite Chlorite. m^^mmw^m. Crystal. Grain-size (mm.). Optical angles. 1 2 3 4 5. 0.39x0.3. 74°. No.. {-W. 0.6x0.33. 80°. 0.39x0.33. 86°. 1.2x0.36. 80°. 0.6x0.3. 82°. •|^. J^=yellowish green~greenish brown, y=greemsh brown, Z== dark brown.. Brown hornblende O^^O'fgf-^, ^^i^-^^Wff^^'i^ L, <l:^^feN^ pale green ^ ^L^:^%. 71c;?^M5EL^ ^^3, green hornblende ^PMft^r^ltu^^ brown hornblende ^? L, ^- o^tt^^^ < ^A^f/>T % ftHln]^^) % . Green hornblende ^-^^: 5 ^mi^^^ (brown) /^ l^Ni^R (pale green) 0)l[X^^^$^^jaA-t /6 ^, 2^=78° (core) -^ 2Va-=79°'. 77° (margin) ^L, feNO^fk^ J; %^;i|lEt|^0^|i^t^fe^^^ J; 5 ^•^ % . ^ h b TO<7)%| ^, quartz vein (Blj^g 0.2mm) <^^M~t% brown hornblende (2Va==86°, c^Z/=15°) •^•H,. :k<D?ff:-^Wt^h green homblende (2^-76°, c-^Z'-20°) ^^<bL, ^^B^^ (-)2V flg^J^ ^ < ts:^ ^ b?^ ^ftffi-t % <^ .: ^-G'^%. /^^^(ili^-G-^t) -6 ff-, green hornblende (2^=84°, c^Z/=18°) r^B^H^ tremolite (2^a=86u, c-^Z'=150) ^t^^[?H^. Plagioclase: ^JEfS%+^'^, ^lAfj/t^t, ^^f&*^^^^'-5. i;/-c^BBB^^ saussuritiza-. tion ^a.^- < L < , L^^ o -T, ^^'W&M^INHM^^t^'^ o ^. ^; ? ^i (-r-)2y=--84°; Andesine (An.g ff^) O^^Mj^^^-t <, 0 ^ ®^^/6 .. (b) Plagioclase : ^^ c frXO-^ifa-- ^ ^^ L, ^Bii^^a^MlAtjOf^^^^Rii^lg^ <s -h-C L-%. ^Wffi^-J^, 7^^< h-^^^^-'F'^, 7^-< h^OXB^tH^^JI^i^^-S). SF^ )^fS 0. 8 mm X 0. 5 mm, b. ^ ^ 2. 5 mm X 2. 0 mm, -\ ^ m_h^ JSW ^i-D = 1. 555—1. 552, ^[1] ^ (+)2V=86°, 78°, (--)2V=80°, tN^^ X'^trace of (010) cm..xQ in zone ± (in albite law) ==. (+)25°~(-'r)230. ^^?^te? X-Y-Z b (010) ®0® <h OWffi X'010=85°, F'"010=68°, Z~010==22°; f?S?^®L, basic andesine (An.o-An,;) ^ffi^^%.. Amphiboles : ;Wt^^faN^-i'€fe h Hfe <h ^^:0? % <, 0^^ '9 , NI£^^^fi^^^~I> <1: L < ^-3^:1^. -^^iTB^-G-a-^fa-fkL-r tremolite ^^%. ^ h h^^^i^WS. Llf, mj^^ ^13AElJHSi-fe^^^t!l^?^, M-^L<^-r;5^ ^^-^a^^^^^/5. -fllft^t^T^^^ (4(5).
(6) ^ Hit ' -^-. -z. BBB^C?^, ^^-|fl (110-110) ^^?i-t/5. ^X^^OO^^&iE (Z'). Broiun hornblende : ^^^L^ 1. 2 mmXO. 8 mm, b ^^ 3. 5 mmX3. 0 mm, Jjli^f^ r'==l. 687,. m^ (-)2V=64°, 62°, 60°. ^^WWgM?^tW^ffWm-t % (2Va=70°). -M^ c'SZ(maxQ=25° on(010), ftX^^^teIE (^/), ^fe'? X/=yellowish brown, Z/= brown. ^ ?SU^[H)43^^ plagioclase -^ monoclinal pyroxene (0. 2mmXO, 1mm, c^Z/-38°) /£ (p'0f?iij^ ff^^^h^t^^. Green hornblende: ^J-^^f^ 0.6mmX0.4mm, ^(fj^ (-)2^=78°, 76°, 74°, ^?i^ c"ZcmaxQ=20°on (010), M^'&IE {Z!\ ^ faft Z/= pale green, Z/=bluish green.. Quartz ^ ffi ^ ^ 0 ^ ^ h L -C ^ ffi L, ^ I- ^©) YN ^ ^'^^ ^6^-5. B) ^^^s$^-7^< h4'^^r^s *J&^:tw ^imrw soorn) ^iwimx^g^b/h^. ^s^^T'^'^ixafe^ey; /5 ?l^)t-^J&^. ^ ^ %. fMr@:±N%^o^^^E^ L -C gfi^-t ^.. (a) ^w<D^m^ JE^'^MA^^EiE^ green hornblende> plagioclase> pyroxene ^^ 6i/£ (9 , ffi^- titanii:e • magnetite ~^i^ts. ^S~G<i^ plagioclase (C'||'tj> leucocratic layer (|^ 2 130 2 ^PM) ^ hornblende> pyroxene. ^'§tf melanocratic \ayer C^J^&t)^ pyroxene> plagloclase ^ '9^%^^^'^^. 1^2003^ os) h ff-m-\±^m (9 ^ T L -,5. Plagioclase : ^^Jlit melanocratic layer ^ leucocmtic layer ^ ^-^ t^z ^){|51ft"C'^, fe'H°B^. ^BQ^^^^W&h^ht^^. -t^^ib, HU^^u^-M, 0.1mmX0.07nm^:0^^.ftJl ^^TO^-L, i^O^B-m, /f@ft^^SU(0.5mmXO,3mm) <h ^ '9 t£ S^-^K^^t-. ^. • ^m^7r.irm^±^^M^^^^.. Melanocratic layer: Plagioclasc tt hornblende ch IX11t^^0li^:%^^^7R^?-X ^•--t^'C ^/6 ,. (+)2V=82°. t^^^^^^m^^^hh^^W^-mC^mM, l.OmmXO.Omm, 2T/"r-840) ^^^bbh^. ^att^-r'/h^ labradorite b^h~^. Leucocratic layer : ^^'^^tM^'^ '9 1^1 \ ^TP^fA^^ffi^Jim^^/cl \ ^ ^^ ^^-F, ^^^7.^ V—T^.^ h, 7/1,.^ h, -< '; ^ '; ^^WlwW^L-b^M. MBB^IC^ X, n,D==1.560, (+)2t7=80°, ^tmce of 010;mn.xo in zone J_ 010 (in albite la^v) = (-r-)3S°' (+)30°, A/"~010-75°, r'~'010==64°, 2"010=30° ; f£MSU^:0 labi-.dorlte ^ffl^-f^. ^/i.^Jm tG~^ © ^ ffa (2 mm X 1 mm, 2 Va = 81 °) ^ ^bhh^.. Pyroxene: Melanocratic layer (D hornblende ^[SgffT;5{@ftttf^^ (O.lmm ^^) 0^%^ '^^hts:^ff\ ^tS;^OJ^^t^^^-C-^, ^SU^BBB C<1:^-^ 2mmXlmm) ff^^bh^. ^ ^O^IJxEflg^lftG^^L-C^. c"Zcma.K.-)=48° on (010), ®XSIE (^/). M(Hitt^?fe' tefe, -^fefe^ < . Augite b m^i" ^ ^ ^ ^- ^ ^ . Hornblende : ^^ c (X?^) ^7E^. {AM? ^ -^^mm^^ < -^ ^ ^ %. I^BB^TO, 1%^^ ^^:{@^^^^ L^^t-^ ^ ^ ,6. ^ fr^lt 6 ^^TT.-t b .to (9 -^-^ /6.. '• e ^ m^»ms ^^B^rAW®-x?^ Crystal No.. 1 2 3 4 5. Grain-size (ram.) 0.6x0.3 0.45x0.3 0.12x0.18 0.15x0.09 0.6x0.4. Optical angles. (+)2V-. Grain-size. (mm.). Optical angles (-)2V~. 58°. 0.18x0.09. 76°. 60°. 0.15x0.06. 82°. 59°. 0.12x0.09. 80°. 59°. 0.15x0.10. 84°. 60°. 0.12X0.09. 78°. (47).
(7) B OTDj^^ § »^®«€^S-^W3'g (Z/), X'^ye\lowish green, Z/=brown-. ish green—bluish green.. (b) ^JHT^^S. w^m^^^i&H^. ^JB h 1^1 'HI, melanocratic layer b leucocratic layer b. ff^ ^ ^^^fi^M^^-t ff\ ^J5"^ tt plagioclase fl:. ff^^M-t^t^, m5^ ^^(t granoblastic texture. ^T^iri 5^/6 (^30. ;Bi). ty-cTO/M^^ |§'^^, ^:3UO plagioclase. m 3 m ^Js® ^' y^ ^ ^ h ^^^^^^^rA^®®%it^x (^WIIT. %). w^mM^^m^b^mw^-^^^-t^. (2). WWM^hWWbo?^&^^t^\ Pl: m. (0.4mmX0.2mm) Olj^ {^; b hornblende (0. 6 mm X 0. 3 mm) b ff^ 7° - ^'\t ^. S (.Plagioclas^, Ho: M-fi^'G (^Hornblende), |g$^=!^. W.). ;MIKt^^, hornblende>plagioclase ^.6^: i9 ,. '1/'SO apatite • magnetite /&^t±i. •'y. ^-z/6.. Melanocratic layer 0 plagioclase : ^-^? O.lmm, (+)2F=85°, X'^-trace of OlOcmax.) m zone ± 010 (in albite law) = (+)31°, A^010=80°, r"010-620, Z"010=32°; •(&MSU^^. labradorite ^ ffi ^ -f- % . Leucocratic layer 0 plagioclase : ^W^ ^ b^r/£.^^ (H) <1: ff^ ^ h h /6 (^sia^us). ^^^^.. F, -< i; ^ i; ^, T^^^ h, ^^/l/.7^ F'-7/l/^<< Ht^OXfH)^. W^M, ^^Bt^X'fft^t^ST^. TO:? 0.2mm, Retardation 237 m/-<, r-ff-0.008 ( ^ ^^Y-fc-^-rj; .5). (+)2y=84°~80°, X'^trsice of OlOcmaxQ in zone ± 010 (in albite law) =(+)33°, ^010=78°, r"010=63°, Z"010=32°; {£^.SJ^^ labradorite ^ffi^T^). Hornblende : ^5^^, xpJ£J^fS 0. 2 mmXO. I mm, Retardation 475 m/^, 7--- a' -? 0. 025 ( ^ V^ ^ -te ^-^J;/5). (--)2y=74°, c^Zcmaxo=25° on (010), ^X^f^^^^telE (^'), A-/=yellowish green, Z'=greenish brown.. -^ it ^m'-/^ 0956) : Bi%-i:gi®JI|%J^®? Y-7^< h^ff^H^^t^li (I) • (II). JEflA, Vol. 40, No. 4, p. 163-168; Nc. 5, p. 196-203.. 4lll^-^ (1964-1966) : B^H-l)llRm^§a?^O^^t^%-tSM-9'£(^2%~m5%). »aiWNiB^(m ;^B), Vol. 15, A^. 1, p. 49-59; No. 2, p. 43-60; Vol. 16, A^o. 1, p. 53-68; Vol. 17, A?o. 1, p. 64-77.. (4S).
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