Cargill Township carbonatite complex, District of ... - Geology Ontario
Cargill Township carbonatite complex, District of ... - Geology Ontario
Cargill Township carbonatite complex, District of ... - Geology Ontario
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R. P. SAGE<br />
Clinohumite is anhedral to subhedral in form. Carbonate forms an anhedral, interlocking mo<br />
saic <strong>of</strong> grains.<br />
Reference No. 784<br />
Sample No. CCM6 545.1-545.5<br />
Phlogopite, magnetite, apatite sovite.<br />
Medium grained, massive, equigranular, allotriomorphic, with curved to straight grain bounda<br />
ries. Phlogopite forms anhedral ragged grains with pleochroic rims that are darker brown than<br />
the cores. Apatite forms rounded anhedral grains. Magnetite forms anhedral disseminated<br />
grains.<br />
Reference No. 785<br />
Sample No. C C M 9 401.8-402.2<br />
Apatite rauhaugite.<br />
Fine to medium grained, massive, inequigranular-seriate, allotriomorphic, with lobate to ser<br />
rate grain boundaries. Apatite forms angular to subangular fragments set in a matrix <strong>of</strong> crushed<br />
carbonate. Apatite sometimes forms segmented crystals. Rounded porphyroclasts <strong>of</strong> carbonate<br />
are set in a matrix <strong>of</strong> crushed and recrystallized carbonate.<br />
Reference No. 786<br />
Sample No. CCM9 409.95-410.6<br />
Biotite, apatite rauhaugite.<br />
Fine to medium grained, inequigranular-seriate, allotriomorphic, with lobate to serrate grain<br />
boundaries. Apatite forms angular crystals and fragments <strong>of</strong> crystals. Apatite <strong>of</strong>ten forms seg<br />
mented crystals. Minor anhedral, reddish brown biotite has pronounced kinking <strong>of</strong> (001) cleav<br />
age. Rounded porphyroclasts <strong>of</strong> carbonate are set in a finer grained matrix <strong>of</strong> recrystallized<br />
carbonate.<br />
Reference No. 787<br />
Sample No. CCM9 515.85-516.2<br />
Apatite rauhaugite.<br />
Fine to medium grained, massive, inequigranular-seriate, allotriomorphic, with lobate to ser<br />
rate grain boundaries. Apatite forms rounded to angular grains which are <strong>of</strong>ten fractured and<br />
segmented. Rounded porphyroblasts <strong>of</strong> carbonate are set in a finer grained matrix <strong>of</strong> recrystal<br />
lized carbonate.<br />
Reference No. 788<br />
Sample No. CCM20 162.2-162.65<br />
Sovite.<br />
Fine to medium grained, massive, inequigranular-seriate, allotriomorphic, with lobate to ser<br />
rate grain boundaries. Carbonate forms an interlocking mosaic <strong>of</strong> anhedral grains; larger grains<br />
are set in a matrix <strong>of</strong> finer grained carbonate. It is unclear whether larger grains are porphyro<br />
clastic or porphyroblastic. Grain boundaries are lobate to serrate. One carbonate phase appears<br />
to replace the second. Finer grained carbonate interdigitates with coarser grained carbonate<br />
which is at least partially controlled by twinning in the carbonate.<br />
Reference No. 789<br />
Sample No. CCM20 246.1-246.7<br />
Sovite.<br />
Fine to medium grained, inequigranular-seriate, allotriomorphic, with serrate to lobate grain<br />
boundaries. Carbonate forms an interlocking mosaic <strong>of</strong> anhedral grains. Larger grains are set in<br />
a matrix <strong>of</strong> finer grained carbonate and have a weak elongation possibly defining a crude folia<br />
tion. Rock could be a recrystallized, deformed <strong>carbonatite</strong>.<br />
Reference No. 790<br />
Sample No. CCM22 168.2-168.6<br />
Apatite, magnetite, phlogopite sovite.<br />
Fine to medium grained, massive, inequigranular-seriate, allotriomorphic, with lobate grain<br />
boundaries. Apatite forms anhedral rounded bead-like grains. Magnetite forms anhedral dis<br />
seminated grains. Phlogopite forms irregular anhedral grains with pale brown cores and deep<br />
reddish brown rims. Mica is strongly zoned. Carbonate forms an interlocking mosaic <strong>of</strong> grains<br />
with lobate grain boundaries.<br />
Reference No. 791<br />
Sample No. CCM23 391.25-391.7<br />
Magnetite, phlogopite, apatite sovite.<br />
Fine to medium grained, massive, inequigranular-seriate, allotriomorphic, with curved grain<br />
boundaries. Phlogopite forms anhedral irregular grains with pale brown cores and deep reddish<br />
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