| [GMHP Protocol Page #1]
RESEARCH AND COLLECTING PROTOCOL
General Information
Project Number: GWINNETT-01
Project Participants: DAVID BABULSKI
Date Started:
6/1999
- 4/2000
Contact Person: DAVID
BABULSKI
E-Mail: DBABULSK@LANIER.COM
Telephone Number: 770-985-1772
Mineral species reported at this site:
HORNBLENDE, EPIDOTE, PIEMONTITE, CHABAZITE,
PYRITE, CHALCOPYRITE, CLINOZOISITE,
DRAVITE var. Tourmaline, PREHNITE, CHLORITE,
CARNET var. Almandine, KAOLINITE,
CALCITE, SULPHUR, HYALITE OPAL
[GMHP Protocol Page #1A]
Site Geographical Data for project: #GWINNETT-01
Date: 4/2000
County: GWINNETT
Nearest City, Town or Village: DULUTH
Nearest major access road: SATELLITE BLVD.,
OLD NORCROSS RD.
Is site on public [ ]
or private [ X ]
property?
If private property, owner's name, address and telephone number:
MORGAN CORP. 770-239-7487
CRESCENT RESOURCES 770-622-9888
Is the site ecologically sensitive? YES [
] , NO [ X
]
Is the site being adversely impacted by development? YES
[ X ] NO [
]
Is collecting permitted? YES [
] , NO [ X ] Site
is extinct!
Collecting level? Unlimited [ NA ],
Fee based collecting [ ], By permission [
]
If permission required, contact person:
NA _________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
_________________________________________________________________________________
Is site location publishable? YES [ X
] NO [ ]
If YES, Latitude and Longitude of site: Lat.:
33 55', Long.: 84 10'
[GMHP Protocol Page #2]
Site Geographical Data for project: #GWINNETT-01
Date: 4/2000
Georgia Geological Province in which the mineral occurrence is located:
Ridge and Valley [ ], Blue Ridge [
], Piedmont [ X ], Coastal
Plain[ ]
Mineral occurrence is in which Geological Survey Quadrangle: NORCROSS
(7 1/2 Quadrangle)
Mineral occurrence is in what geological formation?
WOLF CREEK FORMATION
If mineral occurrence is as float, what geological formation is it most
likely associated with?
NA
What is the host rock type in which the mineral(s) found?
AMPHIBOLITE
If applicable, what is strike and dip of host rocks at mineral occurrence?
COMPLEX FOLDING OF
HOST ROCKS. THE AXIS OF THE FOLDS TREND IN A N 80 E DIRECTION.
MINERAL OCCURRENCE DOES NOT SEEM RELATED TO LOCATION WITHIN THE FOLDING
COMPLEX.
If applicable, briefly describe other structural characteristics of
the host rocks
THINLY LAMINATED FINE GRAINED
AMPHIBOLITE WITH EYE PODS OF EPIDOTE, CLINOZOISITE, QUARTZ.
IN SOME CASES, THESE PODS SHOWING EN E CHELON FRACTURES. THE MOST
HEAVILY MINERALIZED AREA LOCATED IN COARSE GRAINED AMPHIBOLITE.
Does the mineral occurrence appear to be of primary or secondary origin?
THE FOLLOWING APPEAR
TO BE PRIMARY: HORNBLENDE, EPIDOTE, PIEMONTITE, PYRITE, DRAVITE TOURMALINE,
CLINOZOISITE. SECONDARY MINERALS: CALCITE, CHALCOPYRITE, CHABAZITE,
PREHNITE, CHLORITE, SULPHUR, KAOLINITE. Note: The GARNET appears
to be primary associated with QUARTZ.
[GMHP Protocol Page #3]
Sketch of Geological Setting for project # GWINNETT-01
Date: 4/2000
[Link to Sketch
of Geological Setting]
[GMHP Protocol Page #4, A,
B]
Site Mineralogical Data for project # GWINNETT-01
Date: 4/2000
[Link to mineralogical
data and sketch showing location of mineral occurrence(s) at this site]
[GMHP Protocol Page #5]
Site Mineralogical Data – Page 2 for project # GWINNETT-01
Date: 4/2000
Description of mineral species 1: HORNBLENDE
Black to blue gray
laminar crystals, most cases crystals very small. In a few vugs there
are crystals to 3-4mm in length.
Test used in identification of the mineral species:
Association, optical
properties.
Description of mineral species 2: CLINOZOISITE
Light gray green
blocky crystals and masses in eye pods. Some examples of tightly
interlocking crystal sprays. Associated with Epidote.
Test used in identification of the mineral species:
Hardness, color,
optical properties.
Description of mineral species 3: EPIDOTE
Typically in granular
form within "eye pods" in amphibolite. Some very nice gemmy green
crystals in vugs - primarily in the coarse grained amphibolite at site
"A".
Test used in identification of the mineral species:
Crystal form, hardness,
color, optical properties, blowpipe tests
Description of mineral species 4: PIEMONTITE
Occurs with epidote
in "eye pods" exhibiting en echelon fracture. Appears to be a final
stage mineral, showing a chemical change in formation of epidote.
Test used in identification of the mineral species:
color, association,
optical properties, blowpipe tests
Description of mineral species 5: CHABAZITE
Occurs with epidote
in "eye pods". Only present in vugs in massive epidote where larger
epidote crystals formed. Appears as tiny rhomb shaped crystals in
druz form.
Test used in identification of the mineral species:
Chemical (acid test),
association, optical properties
Description of mineral species 6: PYRITE
Occurs as both crystals
and as a metallic film coating amphibolite crystals. Some nice crystals
as cubes in vugs in amphibolite. Also, associated with chalcopyrite.
Test used in identification of the mineral species:
Chemical (acid test),
blowpipe tests, crystal form
Description of mineral species 7: CHALCOPYRITE
Occurs in vugs in
massive pyrite as tiny wedge shaped crystals. Often exhibiting a
brightly colored tarnish.
Test used in identification of the mineral species:
Chemical (acid
test), blowpipe tests, crystal form
Description of mineral species 8: TOURMALINE
(Dravite)
Occurs as acicular
striated prisms, black to brown in color, occurs with quartz in "eye pods"
and in laminar stringers within the amphibolite.
Test used in identification of the mineral species:
Crystal form, optical
properties, EDS (Excalibur Mineral Co.)
[Link to Chemical and Instrumental
analysis of this mineral]
Description of mineral species 9: PREHNITE
Occurs as barrel
shaped nodules in pyrite and chalcopyrite lined vugs with amphibolite and
quartz. Nodules are translucent and chatoyant.
Test used in identification of the mineral species:
Chemical (acid
test), optical properties, crystal form
Description of mineral species 10: KAOLINITE
Occurs as pods and
lenses inter bedded with the amphibolite. Some quartz grains scattered
within the kaolinite. Possibly altered feldspar.
Test used in identification of the mineral species:
Optical properties,
physical characteristics
Description of mineral species 11: SULPHUR
occurs as pale yellow
"melted" crystals scattered on corroded pyrite. Located in vugs in
iron stained quartz. As a lens in the fine grained amphibolite.
Test used in identification of the mineral species:
Chemical (acid test),
blowpipe tests
Description of mineral species 12: CALCITE
Occurs with pyrite
and chalcopyrite in quartz veins within the amphibolite. Calcite
has a golden color. Crystal habit is simple rhombs.
Test used in identification of the mineral species:
Chemical (acid test),
crystal form
Description of mineral species 13: CHLORITE
Occurs as greenish/tan
velvety coating on chalcopyrite in vugs within massive pyrite. Also
occurs with prehnite.
Test used in identification of the mineral species:
Optical properties,
physical characteristics
Description of mineral species 14: GARNET (var.
Almandine)
Occurs as rough to
well formed dark red crystals with quartz. Only one occurrence at
location "A".
Test used in identification of the mineral species:
Crystal form, optical
properties
Description of mineral species 15: HYALITE
OPAL
Occurs as coatings
on fracture surfaces in quartz lenses in the amphibolite of location "A".
Mineral is fluorescent in S/W ultraviolet (bright green).
Test used in identification of the mineral species:
optical properties
[GMHP Protocol Page #6]
Mineral Analytical Data for project # GWINNETT-01
Date: 4/2000
[Link to instrumental
analysis data.]
EDS (Excalibur Mineral Co.)
[GMHP Protocol Page #6A]
Mineral Analytical Data for project # GWINNETT-01
Date: 4/2000
PIEMONTITE
Borax bead test for manganese-Violet red (hot)
in oxidizing flame, near colorless in reducing flame.
Associated with Epidote
Strong red pleochroism
Hardness between 6 and 7
EPIDOTE
Crystal form
Color - pistachio green
Strong pleochroism yellow to green
Hardness between 6 and 7
TOURMALINE (Dravite)
Crystal form
Strong pleochroism yellow to brown
Hardness 7
SULFUR
Crystal form
Color
Blowpipe charcoal block test (blue flame with
sulfur dioxide generated)
Associated with pyrite
CHALCOPYRITE
Crystal form
Color
Hardness between 3 and 4
Blowpipe charcoal block test (blue flame)
Note, this was difficult due to the small amounts of material available
[GMHP Protocol Page #6B]
Mineral Analytical Data for project # GWINNETT-01
Date: 4/2000
PYRITE
Crystal form
Color
Hardness 6
Blowpipe charcoal block test yields magnetic
globule with sulfurous fumes.
CALCITE
Crystal form
Effervescence in cold HCL
Hardness 3
PREHNITE
Color and appearance (optical characteristics)
Hardness 6
Dissolves slowly in HCL
GARNET
Crystal form
Color
Hardness between 6 and 7
CHABAZITE
Crystal form
Hardness between 4 and 5
Dissolves in HCL with a slimy residue
[GMHP Protocol Page #6C]
Mineral Analytical Data for project # GWINNETT-01
Date: 4/2000
KAOLINITE
Color and appearance - See note.
Associations
Clay like feel to the material
HYALITE OPAL
Appearance
Optical characteristics
Fluorescence in U.V.
CLINOZOISITE (Possibly Zoisite)
Pale green block crystals, not like those
of Epidote.
Association with Epidote and Hornblende
Hardness between 6 and 7
NOTE: The presence of quartz in this
material would seem to indicate an alteration product of Feldspar, possibly
from and original material of granitic composition.
[GMHP Protocol Page #7]
Site Additional Data for project # GWINNETT-01
Date: 4/2000
[Link to site
photographs.]
[Link
to specimen photographs.]
[GMHP Protocol Page #8]
Bibliography for project # GWINNETT-01
Date: 4/2000
LATEST THINKING ON THE STRATIGRAPHY OF SELECTED
AREAS IN GEORGIA
WIGLEY, P.B.
GEORGIA GEOLOGIC SURVEY, 1981
GEOLOGY OF THE GREATER ATLANTA REGION
McCONNELL AND ABRAMS
GEORGIA GEOLOGIC SURVEY-BULLETIN 92, 1984
MINERALS OF GEORGIA
COOK, R.B.
GEORGIA GEOLOGIC SURVEY-BULLETIN 92, 1978
DANA'S TEXTBOOK OF MINERALOGY
FORD, W.E.
JOHN WILEY & SONS, NY, 1966
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