Dames & Moore, 1999 - USDA Forest Service

,.' \
/-
i \\
\
i
i \ \..--A
j \
/.-.--------/ \
.-.--2 \
,.,.
\
\ \
1. a \ \
i 0
\ \
i
1 i
\
\.
'. .
\
i
i
i
!
.A. J
.,+-/.-
1'
Kbt
i'
i .\
i
-.-.
'.-..
'.
.,.,.--I
/
i
i.
'. .
DESCRIPTION OF MAP UNITS
Qs SURFlClAL DEPOSITS (QUATERNARY)--Mostly unconsolidated alluvium, collwium, and glacial
materials. Includes reworked volcanic ash and pumice of postglacial eruptions of Glacier Peak volcano
Tgr GRANITE ROCK (TERTIARY)-Granite rock, undifferentiated
Rqd GRANITIC AND METAGRANITIC ROCK (lRIASSIC)--Commonly foliated and heterogeneous chlorite-,
biotite-, and hornblende-bearing quartz diorite, metaquartz diorite, and gneiss or other metamorphic
rock derived from originally plutonic rock
pTgn GNEISS (PRE-TERTIARY)-Undifferentiated gneiss
pTgnm GNEISS (PRE-TERTIARY)-Migrnatltic paragneiss and orthogneiss heterogeneously mixed with
commonly abundant schist
Ljg LAKE JUANITA LEUCOGNEISS
Kbt BLACK PEAK BATHOLITH-Directionless-Weakly foliated phase
i
i
i
1.
I
i
\. '.
i
i
i
i
\
[-.-*/'
I
r-
i
\.
!
I.-.-.
Ktgg GABRIEL PEAK ORTHOGNEISS
nhc NORTHERN HETEROGENOUS CRYSTALLINE COMPLEX
Ts WISP VALLEY SCHIST
LEGEND
X Mine location'
# Area of multiple claim
locations or altered rock1
Properties at which lead is
the principal value2
D Properties at which copper
is of secondary value2
Properties at which arsenic
is the principal value2
Properties is of secondary at which value2 arsenic
! 0 Properties at which lead is of
I-.-. secondary value2 Properties at which zinc is
'.
-.\.
Properties at which copper
is the principal value2
the principal value2
O Properties at which zinc is of
I
i
secondary value2
-. x. \.-. -. from church et a/. BC-1 (aquatic reference
'. '. -. riom Hunting reach sampling station)
-.-_ . -. -.-. . '. \
A
Refer to '. \. Division of Mines and EcoIogy, Bull. Na 37, V2.
.!
8
'.----.
Sources: Hunting, M M, 1956, Inwntory of Washington Minerals,
Figures 4.2-4 and 4.2-5
i
Church, S.E., et al.. 1984, Mineral Resource Potential
for Railroad Creek i
Map of the Glacier Peak Wilderness and Adjacent
i
watershed geology I i Areas, Chelan, Skagit, and Snohomish Cwnties. WA
! i US Geological Sum)i misc. Field Studies Map MF
0 3 / i 1652-A.
i
i
Miller. R. B., 1987, Geologic Map of the Twisp Riveri
Chelan Divide Region, North Cascades, Washinstton
Approximate i
Holden Mine Site M~ller. R.
Scale in Miles i
6, 1987, Geologic Map of Part of the
i McAlaster Mountain Quadrangle, Washington
\
I
k.
37 b !\. Figure 4.2-3
1 NORTH LAKE CHELAN BASIN GEOLOGY MAP
AMES & MOORE
WITH HISTORIC MINING ACTIVITY
DAMES 6 MOORE GROW COMPANY
693-005-019
Holden Mine RIIFS
Draft Final RI Report