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Sample Type is Igneous › Plutonic

621 records | Download
IGSN Sample Type Notes Location Number Thin Sections Storage Location
GRD02QKS0 Granite Medium to coarse grained California 1 Ritter 154, 15 B
GRD02QNS0 Granodiorite Mt. Stuart batholith Washington 0 Ritter 154, 19 K
GRD02QOS0 Granodiorite May contain enough Quartz to classify as Tonalite Washington 0 Ritter 154, 15 P
GRD02QPS0 Granite California 4 Ritter 154, 15 B
GRD02QQS0 Diorite 50% plag, 15% hornblend, 20% quartz,10% biotite, 3% Kspar, 2% sphene and ap. Some opaques. California 1 Ritter 154, 19 E
GRD02QRS0 Granodiorite Plag>quartz>amphibole Accessory minerals: Oxide, chlorite, K-spar Fiji 3 Ritter 154, 19 K
GRD02QTS0 Diorite California 2 Ritter 154, 15 P
GRD02QXS0 Granodiorite Probably typical of the main rock type here US-40 Donner Pass 8/99 approximately at bridge, overlook 1 Ritter 154, 15 O
GRD02QYS0 Diorite California 5 Ritter 154, 15 P
GRD02R0S0 Mafic Intrusive Gabbro Norite with shear zone showing cataclasis. Original Description: Layered Gabbro/Troctolite. California 2 Ritter 154, 16 D
GRD02R1S0 Mafic Intrusive Wehrlite, may contain enough Opx to be considered Lherzolite. Original Description: Mela-Norite Dike cutting Calif 1237 and Calif 1238 California 2 Ritter 154, 16 D
GRD02R2S0 Anorthosite Medium grained plagioclase, amphibole rich. California 0 Ritter 154, 16 C
GRD02R3S0 Gabbro Hb gabbro; part of meter scale dike with very large amphibole crystals perpendicular to the margin. 3-6 cm Hb crystals with altered plagioclase. Slightly fractured. California 0 Ritter 154, 16 C
GRD02R4S0 Gabbro California 0 Ritter 154, 20 B
GRD02R5S0 Gabbro Amphibole plag banding, medium grained. Plag and hornblend approximately one cm in size. Moderate weathering. Opx, possibly some olivine California 0 Ritter 154, 16 D
GRD02R7S0 Granodiorite 10 Kspar, 40 plag, 5 amphibole, 40 quartz, 5 biotite + sphene 0 Ritter 154, 15 N
GRD02RLS0 Granite Cummulate Tourmaline(Schorlite) bearing pegmatite. Off-white subhedral Plagioclase(1-2 cm) forming cumulate band in rock. Gray vitreous anhedral Quartz(0.5-2 cm). Light pink/yellow subhedral K-spar (1-5 mm). Black sub/euhedral Schorlite (1 mm - 1 cm) forming cummulate band adjacent to Plagioclase band. 4 Ritter 154, 3 F
GRD02RSS0 Diorite One 1cm thick slab. Coarse grained, weathered, Plagioclase, Quartz, Hornblende, Biotite, trace K-spar apatite and sphene, minor chlorite Point Reyes CA, from N end of point, from the Salinian block. 4 Ritter 154, 3 E
GRD02RUS0 Monzonite Two hand samples and two billets California 3 Ritter 154, 3 E
GRD02RXS0 Gabbronorite Fine grained massive Gabbronorite. Plagioclase, Hornblende, Pyroxene. 2 Ritter 154, 3 E
GRD02RYS0 Diorite Medium grained, Quartz, Plag, Hornblende, Biotite. 0 Ritter 154, 3 E
GRD02RZS0 Granodiorite Washington 3 Ritter 154, 3 E
GRD02S2S0 Gabbro Washington 0 Ritter 154, 3 C
GRD02S5S0 Peridotite Weathered serpentinized peridotite with half inch weathered brown crust with reaction rim visible. Secondary serpentinization. California 0 Ritter 154, 16 K
GRD02SCS0 Ultramafic Intrusive Montana 0 Ritter 154, 16 L
GRD02SDS0 Granite Likely part of cumulate series from near Champlain mountain. Subhedral Kspar, Q and hornblende. Maine 0 Ritter 154, 19 C
GRD02SFS0 Intermediate Intrusive 20-5-% plag, under 15% Hb, under 5% cpx. La Sal Loop Rd. In northern La Sal mountains E of Moab. 0 Ritter 154, 19 K
GRD02SGS0 Intermediate Intrusive 20-5-% plag, under 15% Hb, under 5% cpx. La Sal Loop Rd. In northern La Sal mountains E of Moab. 0 Ritter 154, 14 L
GRD02SZS0 Gabbro Coarse plagioclase and Hornblende, bands of coarse, medium, fine grain sizes. California 0 Ritter 154, 16 D
GRD02T0S0 Norite Los Pinos Pluton. Coarse plagioclase, pyroxene (opx and cpx) and olivine altered to iddingsite. California 0 Ritter 154, 16 E