Preserved organic matter in a fossil Ocean Continent Transition in the Alps: the example of Totalp, SE Switzerland

Mateeva, Tsvetomila; Wolff, George A.; Manatschal, Gianreto; Picazo, Suzanne; Kusznir, Nick J.; Wheeler, John

doi:10.1007/s00015-017-0266-3

Swiss Journal of Geosciences

Table 1 Results by lithology including mineralogy and texture observed in hand specimens and the texture on the calcites used for the isotopic analyses (δ¹³C_VPDB, δ¹⁸O_VPDB)

From: Preserved organic matter in a fossil Ocean Continent Transition in the Alps: the example of Totalp, SE Switzerland

Rock type	Sample number	Coordinates (UTM)		Locality	Macroscopic description	Mineralogical description	Texture	Carbonate texture	δ ¹³C_VPDB (‰) Ca veins	δ ¹⁸O_VPDB (‰) Ca veins
Rock type	Sample number	X (m)	Y (m)	Locality	Macroscopic description	Mineralogical description	Texture	Carbonate texture	δ ¹³C_VPDB (‰) Ca veins	δ ¹⁸O_VPDB (‰) Ca veins
Serpentinite
Massive serpentinite	5	561895	5188662	Parsennfurgga	Massive black serpeninite with white angular borders defining the experidotite minerals, small green chrysotile veinlets and white carbonate veinlets	Olivine completely replace by serpentine minerals, phantoms of pyroxene, magnetite, later carbonate vein; calcite veins with only one stage of crystal growing	Mesh^a
Massive serpentinite	16	561522	5188399	2442 m. Obersasställi-Parsennfurga			Mesh^a	Calcite vein, 1st generation	0.11	−10.2
Serpentinite with numerous calcite veins	24	561514	5188009	Obersasställi	Broken serpentinite clasts from a first generation of greyish deformed calcite veins crosscut almost perpendicularly by a second generation of white calcite veins	Mainly mesh texture with rare ribbon texture; randomly dispersed anhedral magnetite grain; later veins of chrysotile	Clast supported breccia^a	Calcite vein, 1st generation	0.03	−11.75
	26	561504	5188010	2442 m. Obersasställi-Parsennfurga
	44	561518	5188415
	47	561540	5188427
Red serpentinite	71	561588	5188095	2442 m. Obersasställi-Parsennfurga	Red matrix with dark-black deformed clasts/veins with numerous calcite veins, also contain dark green serpentinite	The serpentinite is lizardite containing also talc and calcite; the red colour is due to hematite (4%)	Red serpentinite breccia	Calcite vein, 2st generation	1.37	−11.3
Serpentinite gouge	69	561929	5187152	Obersasställi	Black fine-grained deformed serpentinite with equant serpentine grain following and distributed systematicaly and fine short veinlets (chrysotile; calcite)	No thin section or XRD	Fine grained
Serpentinite cataclasite	70	561929	5187152	Obersasställi	Black serpentinite with subangular serpentinie clasts showing no prefered orientation	No thin section or XRD	Fine grained
Massive serpentinite*	77	561482	5187004	Weissfluhjoch	Black serpentinite with sub-rounded anhedral white-grayish peridotite mineral (pyroxene) and small chrysotile veins	No thin section or XRD	Mesh
Massive serpentinite*	78	561482	5187004	Weissfluhjoch		No thin section or XRD	Mesh
Sedimentary ophicalcite
Limestone (Neptunian dykes)	1	561543	5188408	2442 m. Obersasställi-Parsennfurga	Fine micritic pink and red pelagic limestone; serpentine minerals as clasts and veins	Three types of carbonate crystal growing; the matrix composed of rounded to angular coarse grains with hornblend floating randomly in the matrix	Porphyro-clastic^a	Calcite vein, 2nd generation	1.56	−6.4
Limestone (Neptunian dykes)	23	561514	5188009	Obersasstalli
Tectono-sedimentary ophicalcite	21	561520	5188015	Obersasställi	Red fine carbonate matrix with black anhedral serpentinite broken clasts crosscutted by calcite veins	Serpentinites clasts broken by several generation of carbonate veins; several stage of crystal growing for the carobnates;	Fine grained with clasts^a
	25	561511	5188009	Obersasställi				Calcite vein, 1st generation	0.32	-11.7
	39	561515	5188439	2442 m. Obersasställi-Parsennfurga				Calcite vein, 1st generation	0.58	-10.9
	41	561572	5188406					Calcite vein, 2nd generation	1.78	-7.1
	42	561572	5188406					Calcite vein, 1nd and 2nd gener	0.42; 1.07	−10.3; −8.6
	46	561540	5188418
	66	564260	5190402	Near Grüenhorn				Calcite vein, undetermined generation	1.86	−6.2
Reworked tec-sed ophicalcite	9	562586	5188578	Parsennfurga-Parsennhütte	Pink carbonate with randomly orientated elongated clast of ophicalcite (serpentinite + carbonate); numerous calcite veins	No thin section or XRD	reworked^a
Vein supported serpentinite breccia	72	561929	5187152	2442 m. Obersasställi-Parsennfurga	Centimetric angular clasts of green serpentinite tectonically broken by calcite veins	No thin section or XRD	Vein supported breccia	Calcite vein, undetermined generation	1.60	−10.6
Sediments
Radiolarite	62	564212	5190386	Near Grüenhorn from sulphide rich outcrop	Hard fine grained red siliceous rock; post deposition quartz vein perpendiulcar to the geometry of deposition	No thin section or XRD	Fine grained	Post-deposit calcite vein	−0.79	−6.4
	68	564252	5190393	Near Grüenhorn from sulphide rich outcrop		No thin section or XRD	Fine grained
Siliceous shale	60	564212	5190386	Near Grüenhorn from sulphide rich outcrop	Greyiish-reddish fine grained siliceous rock, great porosity and numerous fractures	Composed mainly by quartz (46%), plagioclase(30%), chlorite, muscovite and hematite	Fine grained
	61	564212	5190386	Near Grüenhorn from sulphide rich outcrop			Fine grained
	15	564049	5189517	Gotschnagrat	Red and grey fine grained intercalated siliceous shale with deformed quartz veins	Dominated by quartz (89%) with plagioclase, muscovite, chlorite and trace of hematite	Fine grained
	18	564213	5189544	Gotschnagrat			Fine grained
Limestone	10	562494	188558	Parsennfurga-Parsennhütte	Grey limestone with numerous calcite veins of two generation almost perpendicular to each other	Pelagic limestone, evidence of fossil organisms filled by sparry calcite	Fine grained
Limestone	19	563790	5189694	Gotschnagrat			Fine grained	Calcite vein, 1st generation	0.56	−6.5
Limestone	53	563144	5188716	South from Parsennhütte	Grey limestone with fine greyish veinlets and rare short calcite veins with pink pelagic limestone (hematite) in places	No thin section or XRD	Fine grained
	54	563140	5188707
	56	563140	5188707
	57	563144	5188716
	58	563144	5188716
Carbonate (sulphide rich outcrop)	63	564212	5190386	Near Grüenhorn	Carbonate rock with deformed quartz veins; microscopic grain ofpyrite everywhere except in the quartz and calcite veins	Dominated by calcite (53%) with quartz, chlorite (12%) and pyrite	Porphyro-clastic
	64	564212	5190386					Calcite vein, 2nd generation	1.4	−6.6
	65	564252	5190393		Very fractured sample with greater porosity

The vein generation is defined from the specific example and may not correlate across all samples
* All lithology are from the lower sub-unit with the exception of the massive serpentinite (samples 77, 78)
^aThin section of the lithology is observed

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