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SAMPLE INFO : 09KCNYE007

Sample ID:	09KCNYE007
Station ID:	09KCNYE007
Latitude:	52.16898
Longitude:	-175.52397
Datum:	NAD83
Date Sampled:	2009-01-01

Text Description:
Hand sample; >20g. At north end of massive pink-weathering lava in north end of a large section of bedded rx (PFs, lahars, etc.) on SW part of island. Px-bearing hb dacite. Hb up to 1.5 cm, mostly ~0.5 cm, prismatic. These massive lavas overlie more bedded coarse material which make up lower half of w-facing cliffs and slopes on cone. Massive lavas (perhaps 2 separate bodies) and therefore maybe domes or vent filling lavas. Pics from land and sea of this unit. [Auklets, constant chatter heard from groups immediately offshore. When standing at "the rock" heard lots of chatter seeming to come from base of these cliffs. Groups of ~1-200 come in and sit on 08 deposits - thick mud/surge on top) for a minute or two, then leave. As I leave this place will look back and see many hundred to few thousand standing here. Jeff Williams will tell me that talus buried here used to be home for nocturnal auklets, not these least and whiskered.] Arroyo adjacent to 007 in valley to N is ~8-12 m deep w/ near vertical walls. Edge-parallel cracks - tension cracks - suggest active process of sloughing into gully. Top 10-50 cm (variable) is ubiquitous mud which forms mudcracks at surface and columns in x-sctn. Below is/are lithic pfs w/ up to 1 cm grains and abt lithics. Scoria mostly light. Below this much coarser w/ angular boulders up to 2 m (photo) suspended in fine matrix. Mottled light pinkish-gray and gray amphibole (amph) plag lava. Amphibole is typically euhedral prisms ~1mm across and 5-10mm long - occasional larger xls. Amph reaction rim obvious on sawn surface w/ hand lens. Plag ~1-2mm. Amph >= plag >> px; total phenocrysts ~30%. Gms has alternating zones that are reddish and gray on scale of several mm. Cleaner sample not available at outcrop.

References:

Geology of Kasatochi volcano, Aleutian Islands, Alaska

GEOCHEM DATA

StationID	Latitude	Longitude	Geologist	DateVisited	Age Info	Volcano	Eruption	Location Description	Text Description	Sample ID	Sample Type 1	Sample Type 2	Final Unit	Material	SiO2	TiO2	Al2O3	FeOT	MnO	MgO	CaO	Na2O	K2O	P2O5	Total-majors	REF majors	METH majors	Fe2O3/Fe203T orig	FeO/FeOT orig	Volatiles csv	METH volatiles	Cs	Rb	Ba	Sr	La	Ce	Pr	Nd	Sm	Eu	Gd	Tb	Dy	Ho	Er	Tm	Yb	Lu	Y	Zr	Nb	Hf	Ta	Pb	Th	U	Sc	V	Cr	Fe	Co	Ni	Cu	Zn	Ga	Mo	As	Na	K	Ref trace1	METH trace1	Rb	Ba	Sr	La	Ce	Nd	Sm	Eu	Gd	Dy	Er	Yb	Lu	Y	Zr	Nb	Pb	Th	U	Sc	Ti	V	Cr	Ni	Cu	Zn	Ga	Ref trace2	METH trace2	Light csv	Halogen csv	other major csv	other lile csv	other ree csv	other hfse csv	other hpe csv	other tm csv	other misc csv
09KCNYE007	52.16898	-175.52397	Nye, C. J.	2009-06-13		Kasatochi			Hand sample; >20g. At north end of massive pink-weathering lava in north end of a large section of bedded rx (PFs, lahars, etc.) on SW part of island. Px-bearing hb dacite. Hb up to 1.5 cm, mostly ~0.5 cm, prismatic. These massive lavas overlie more bedded coarse material which make up lower half of w-facing cliffs and slopes on cone. Massive lavas (perhaps 2 separate bodies) and therefore maybe domes or vent filling lavas. Pics from land and sea of this unit. [Auklets, constant chatter heard from groups immediately offshore. When standing at "the rock" heard lots of chatter seeming to come from base of these cliffs. Groups of ~1-200 come in and sit on 08 deposits - thick mud/surge on top) for a minute or two, then leave. As I leave this place will look back and see many hundred to few thousand standing here. Jeff Williams will tell me that talus buried here used to be home for nocturnal auklets, not these least and whiskered.] Arroyo adjacent to 007 in valley to N is ~8-12 m deep w/ near vertical walls. Edge-parallel cracks - tension cracks - suggest active process of sloughing into gully. Top 10-50 cm (variable) is ubiquitous mud which forms mudcracks at surface and columns in x-sctn. Below is/are lithic pfs w/ up to 1 cm grains and abt lithics. Scoria mostly light. Below this much coarser w/ angular boulders up to 2 m (photo) suspended in fine matrix. Mottled light pinkish-gray and gray amphibole (amph) plag lava. Amphibole is typically euhedral prisms ~1mm across and 5-10mm long - occasional larger xls. Amph reaction rim obvious on sawn surface w/ hand lens. Plag ~1-2mm. Amph >= plag >> px; total phenocrysts ~30%. Gms has alternating zones that are reddish and gray on scale of several mm. Cleaner sample not available at outcrop.	09KCNYE007				Whole-rock	55.57	0.655	18.7	7.69	0.178	3.73	8.75	3.48	1.073	0.168	98.54	12761	XRF		7.69			0.8233	23.4	368.1	418.4	7.883	17.296	2.4424	10.764	2.843	0.9329	3.031	0.5165	3.271	0.7069	2.0121	0.2986	1.9535	0.3208	18.8	85.9	1.6131	2.1876	0.11478	7.802	2.0817	0.9047	21.3	207.9	17.6			15.8	74.1	80.6	18.4					12761	ICPMS: Cs, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Nb, Hf, Ta, Pb, Th, U; XRF: Rb, Ba, Sr, Y, Zr, Sc, V, Cr, Ni, Cu, Zn, Ga;

SAMPLE LOCATION

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