U–Pb dating of calcite in ancient carbonates for age estimates of syn- to post-depositional processes: a case study from the upper Ediacaran strata of Finnmark, Arctic Norway

Results of in situ U–Pb dating of calcite spherulites, cone-in-cone (CIC) calcite and calcite fibres from a calcareous concretion of the upper Ediacaran of Finnmark, Arctic Norway, are reported. Calcite spherulites from the innermost layers of the concretion yielded a lower intercept age of 563 ± 70 Ma, which, although imprecise, is within uncertainty of the age of sedimentation based on fossil assemblages. Non-deformed CIC calcite from the bottom part of the concretion yielded an age of 475 ± 25 Ma, which is interpreted as the age of CIC calcite formation during a period of fluid overpressure induced during burial of the sediments. Deformed CIC calcite from the top part of the concretion yielded an age of 418 ± 23 Ma, which overlaps with a known Caledonian tectono-metamorphic event, and indicates a potential post-depositional overprint at this time. Calcite fibres that grew in small fissures along spherulite rims, which are interpreted as a recrystallization feature during deformation and formation of a cleavage, gave an imprecise age of 486 ± 161 Ma. Our results show that U–Pb dating of calcite can provide age constraints for ancient carbonates and syn- to post-depositional processes that operated during burial and metamorphic overprinting

Reflection seismic study of the Siljan Ring impact structure: Orsa - Stacked data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Orsa profile. The profile has length of c. 12 km and the processed data image the geological section to about 3 km depth (Silurian siliciclastic and Ordovician carbonate rocks to serveral hundred metres depth, below disturbed Paleoproterozoic crystalline basement). During the survey, 542 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and are published here: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. Key acquisition parameters are: Number of channels: 320 (160–160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100–200 ms Sweeps per source point: 3–4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 12 km Source points: 542 Dates acquired: 10/6–15/6: 2011 This dataset contains processed data of the Orsa profile. Processing steps for this data set: 1: Read decoded VIBSIST data 2: Bulk static shift to zero time 3: Apply geometry 4: Pick first breaks 5: Spherical divergence correction 6: Trace editing 7: Trace balance: 0–3000 ms 8: Spectral equalization: 0–600 ms: 50–80–200–240 Hz; 700–1500 ms: 40–70–180–240 Hz 9: Time variant bandpass filter: 0–400 ms: 50–80–240–360 Hz; 450–600 ms: 45–70–210–300 Hz; 700–1000 ms: 40–60–180–270 Hz; 1100–3000 ms: 35–50–150–225 Hz 10: Refraction statics: datum 180 m, replacement velocity 3000 m/s 11: Residual statics 12: Median filter: 11 traces, 3 samples, 1600, 2000, 2400 m/s, subtract 13: AGC: 50 ms 14: No mute 15: Residual statics 16: Velocity analysis 17: NMO correction: 70% stretch mute 18: Trace balance 19: FX Decon: 19 trace window 20: Dip filter 1.5 ms/trace cutoff 21: Trace balance Processed seismic data stored as one file for the enitre seismic profile, according to SEG technical standard SEG-Y revision 1 (SEG-Y_r1.0, 2002); https://seg.org/Publications/SEG-Technical-StandardsÅr 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Orsa profilen (detta dataset) är ca 12 km lång och visar de geologiska strukturerna till ca 3 km djup. Geologin består av flera hundra meter med siluriska klastiska sedimentära bergarter och ordoviciska karbonatbergarter som vilar på paleoproterozoiskt kristallint urberg. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1042. Bearbetad data för Orsa-profilen. Mer information på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND104

Reflection seismic study of the Siljan Ring impact structure: Orsa - Raw data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Orsa profile. The profile has length of c. 12 km and the processed data image the geological section to about 3 km depth (Silurian siliciclastic and Ordovician carbonate rocks to serveral hundred metres depth, below disturbed Paleoproterozoic crystalline basement). During the survey, 542 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and published: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. This dataset contains the raw data of the Orsa profile after decoding the sweep signal the VIBSIST 3000 source. Processing steps for this data set: 1: Read decoded VIBSIST data Key acquisition parameters are: Number of channels: 320 (160–160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100–200 ms Sweeps per source point: 3–4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 12 km Source points: 542 Dates acquired: 10/6–15/6: 2011 File format: SEGD rev 2; Field acquisition notes scanned to PDF Digital shot records, one file per shot, according to SEG technical standard SEG-D revision 2.1 (SEG-D_r2.1, 2006); https://seg.org/Publications/SEG-Technical-Standards Data is available on request due to file size.År 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Orsa profilen (detta dataset) är ca 12 km lång och visar de geologiska strukturerna till ca 3 km djup. Geologin består av flera hundra meter med siluriska klastiska sedimentära bergarter och ordoviciska karbonatbergarter som vilar på paleoproterozoiskt kristallint urberg. Datasetet innehåller rådata för Orsa-profilen, efter avkodning. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan. Data är tillgängliga efter förfrågan med anledning av filstorlek

Reflection seismic study of the Siljan Ring impact structure: Mora - Migrated data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Mora profile. The profile has length of c. 10 km and the processed data image the geological section to about 3 km depth. During the survey, 391 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and are published here: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. Key acquisition parameters are: Number of channels: 320 (160-160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100-200 ms Sweeps per source point: 3-4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 10 km Source points: 391 Dates acquired: 3/6-9/6: 2011 This dataset contains processed data of the Mora profile: Processing steps for this data set: 1: Read decoded VIBSIST data 2: Bulk static shift to zero time 3: Apply geometry 4: Pick first breaks 5: Spherical divergence correction 6: Trace editing 7: Trace balance: 0–3000 ms 8: Spectral equalization: 0–600 ms: 50–80–200–240 Hz; 700–1500 ms: 40–70–180–240 Hz 9: Time variant bandpass filter: 0–400 ms: 50–80–240–360 Hz; 450–600 ms: 45–70–210–300 Hz; 700–1000 ms: 40–60–180–270 Hz; 1100–3000 ms: 35–50–150–225 Hz 10: Refraction statics: datum 160 m, replacement velocity 3000 m/s 11: Residual statics 12: Median filter: 11 traces, 3 samples, 5300 m/s, subtract 13: AGC: 50 ms 14: Mute: top and bottom 15: Residual statics 16: Velocity analysis 17: NMO correction: 70% stretch mute 18: Trace balance 19: FX Decon: 19 trace window 20: No dip filter 21: Trace balance 22: Stolt migration: 200–3000, 1000–4000 ms/s Processed seismic data stored as one file for the enitre seismic profile, according to SEG technical standard SEG-Y revision 1 (SEG-Y_r1.0, 2002); https://seg.org/Publications/SEG-Technical-StandardsÅr 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Mora profilen (detta dataset) är ca 10 km lång och visar de geologiska strukturerna till ca 3 km djup. Den seismiska bilden visar att den geologiska följden i de siluriska och ordoviciska sedimentera bergarterna är starkt störd. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050 Bearbetade data för Mora-profilen. Mer information på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050

Reflection seismic study of the Siljan Ring impact structure: Orsa - Time-depth migrated data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Orsa profile. The profile has length of c. 12 km and the processed data image the geological section to about 3 km depth (Silurian siliciclastic and Ordovician carbonate rocks to serveral hundred metres depth, below disturbed Paleoproterozoic crystalline basement). During the survey, 542 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and are published here: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. Key acquisition parameters are: Number of channels: 320 (160–160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100–200 ms Sweeps per source point: 3–4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 12 km Source points: 542 Dates acquired: 10/6–15/6: 2011 This dataset contains processed data of the Orsa profile. Processing steps for this data set: 1: Read decoded VIBSIST data 2: Bulk static shift to zero time 3: Apply geometry 4: Pick first breaks 5: Spherical divergence correction 6: Trace editing 7: Trace balance: 0–3000 ms 8: Spectral equalization: 0–600 ms: 50–80–200–240 Hz; 700–1500 ms: 40–70–180–240 Hz 9: Time variant bandpass filter: 0–400 ms: 50–80–240–360 Hz; 450–600 ms: 45–70–210–300 Hz; 700–1000 ms: 40–60–180–270 Hz; 1100–3000 ms: 35–50–150–225 Hz 10: Refraction statics: datum 180 m, replacement velocity 3000 m/s 11: Residual statics 12: Median filter: 11 traces, 3 samples, 1600, 2000, 2400 m/s, subtract 13: AGC: 50 ms 14: No mute 15: Residual statics 16: Velocity analysis 17: NMO correction: 70% stretch mute 18: Trace balance 19: FX Decon: 19 trace window 20: Dip filter 1.5 ms/trace cutoff 21: Trace balance 22: Stolt migration: 200–3000, 1000–4000 ms/s 23: Time-depth conversion Processed seismic data stored as one file for the enitre seismic profile, according to SEG technical standard SEG-Y revision 1 (SEG-Y_r1.0, 2002); https://seg.org/Publications/SEG-Technical-StandardsÅr 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Orsa profilen (detta dataset) är ca 12 km lång och visar de geologiska strukturerna till ca 3 km djup. Geologin består av flera hundra meter med siluriska klastiska sedimentära bergarter och ordoviciska karbonatbergarter som vilar på paleoproterozoiskt kristallint urberg. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1042. Bearbetad data för Orsa-profilen. Mer information på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND104

Reflection seismic study of the Siljan Ring impact structure: Orsa - Migrated data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Orsa profile. The profile has length of c. 12 km and the processed data image the geological section to about 3 km depth (Silurian siliciclastic and Ordovician carbonate rocks to serveral hundred metres depth, below disturbed Paleoproterozoic crystalline basement). During the survey, 542 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and are published here: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. Key acquisition parameters are: Number of channels: 320 (160–160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100–200 ms Sweeps per source point: 3–4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 12 km Source points: 542 Dates acquired: 10/6–15/6: 2011 This dataset contains processed data of the Orsa profile. Processing steps for this data set: 1: Read decoded VIBSIST data 2: Bulk static shift to zero time 3: Apply geometry 4: Pick first breaks 5: Spherical divergence correction 6: Trace editing 7: Trace balance: 0–3000 ms 8: Spectral equalization: 0–600 ms: 50–80–200–240 Hz; 700–1500 ms: 40–70–180–240 Hz 9: Time variant bandpass filter: 0–400 ms: 50–80–240–360 Hz; 450–600 ms: 45–70–210–300 Hz; 700–1000 ms: 40–60–180–270 Hz; 1100–3000 ms: 35–50–150–225 Hz 10: Refraction statics: datum 180 m, replacement velocity 3000 m/s 11: Residual statics 12: Median filter: 11 traces, 3 samples, 1600, 2000, 2400 m/s, subtract 13: AGC: 50 ms 14: No mute 15: Residual statics 16: Velocity analysis 17: NMO correction: 70% stretch mute 18: Trace balance 19: FX Decon: 19 trace window 20: Dip filter 1.5 ms/trace cutoff 21: Trace balance 22: Stolt migration: 200–3000, 1000–4000 ms/s Processed seismic data stored as one file for the enitre seismic profile, according to SEG technical standard SEG-Y revision 1 (SEG-Y_r1.0, 2002); https://seg.org/Publications/SEG-Technical-StandardsÅr 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Orsa profilen (detta dataset) är ca 12 km lång och visar de geologiska strukturerna till ca 3 km djup. Geologin består av flera hundra meter med siluriska klastiska sedimentära bergarter och ordoviciska karbonatbergarter som vilar på paleoproterozoiskt kristallint urberg. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1042. Bearbetad data för Orsa-profilen. Mer information på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND104

Reflection seismic study of the Siljan Ring impact structure: Mora - Raw data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Mora profile. The profile has length of c. 10 km and the processed data image the geological section to about 3 km depth. During the survey, 391 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and published: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. This dataset contains the quality controlled raw data of the Mora profile after decoding the sweep signal the VIBSIST 3000 source. Processing steps for this data set: 1: Read decoded VIBSIST data Key acquisition parameters are: Number of channels: 320 (160-160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100-200 ms Sweeps per source point: 3-4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 10 km Source points: 391 Dates acquired: 3/6-9/6: 2011 File format: SEGD rev 2; Field acquisition notes scanned to PDF Data is available on request due to file size.År 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Mora profilen (detta dataset) är ca 10 km lång och visar de geologiska strukturerna till ca 3 km djup. Den seismiska bilden visar att den geologiska följden i de siluriska och ordoviciska sedimentera bergarterna är starkt störd. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan. Datasetet innehåller rådata för Mora-profilen, efter avkodning. Data är tillgängliga efter förfrågan med anledning av filstorlek

Reflection seismic study of the Siljan Ring impact structure: Mora - Time-depth migrated data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Mora profile. The profile has length of c. 10 km and the processed data image the geological section to about 3 km depth. During the survey, 391 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and are published here: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. Key acquisition parameters are: Number of channels: 320 (160-160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100-200 ms Sweeps per source point: 3-4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 10 km Source points: 391 Dates acquired: 3/6-9/6: 2011 This dataset contains processed data of the Mora profile: Processing steps for this data set: 1: Read decoded VIBSIST data 2: Bulk static shift to zero time 3: Apply geometry 4: Pick first breaks 5: Spherical divergence correction 6: Trace editing 7: Trace balance: 0–3000 ms 8: Spectral equalization: 0–600 ms: 50–80–200–240 Hz; 700–1500 ms: 40–70–180–240 Hz 9: Time variant bandpass filter: 0–400 ms: 50–80–240–360 Hz; 450–600 ms: 45–70–210–300 Hz; 700–1000 ms: 40–60–180–270 Hz; 1100–3000 ms: 35–50–150–225 Hz 10: Refraction statics: datum 160 m, replacement velocity 3000 m/s 11: Residual statics 12: Median filter: 11 traces, 3 samples, 5300 m/s, subtract 13: AGC: 50 ms 14: Mute: top and bottom 15: Residual statics 16: Velocity analysis 17: NMO correction: 70% stretch mute 18: Trace balance 19: FX Decon: 19 trace window 20: No dip filter 21: Trace balance 22: Stolt migration: 200–3000, 1000–4000 ms/s 23: Time-depth conversion Processed seismic data stored as one file for the enitre seismic profile, according to SEG technical standard SEG-Y revision 1 (SEG-Y_r1.0, 2002); https://seg.org/Publications/SEG-Technical-StandardsÅr 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Mora profilen (detta dataset) är ca 10 km lång och visar de geologiska strukturerna till ca 3 km djup. Den seismiska bilden visar att den geologiska följden i de siluriska och ordoviciska sedimentera bergarterna är starkt störd. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050 Bearbetad data för Mora-profilen. Mer information på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050

Reflection seismic study of the Siljan Ring impact structure: Mora - Shot geometry corrected

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Mora profile. The profile has length of c. 10 km and the processed data image the geological section to about 3 km depth. During the survey, 391 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and are published here: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. Key acquisition parameters are: Number of channels: 320 (160-160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100-200 ms Sweeps per source point: 3-4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 10 km Source points: 391 Dates acquired: 3/6-9/6: 2011 This dataset contains processed data of the Mora profile: Processing steps for this data set: 1: Read decoded VIBSIST data 2: Bulk static shift to zero time 3: Apply geometry Processed seismic data stored as one file for the enitre seismic profile, according to SEG technical standard SEG-Y revision 1 (SEG-Y_r1.0, 2002); https://seg.org/Publications/SEG-Technical-StandardsÅr 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Mora profilen (detta dataset) är ca 10 km lång och visar de geologiska strukturerna till ca 3 km djup. Den seismiska bilden visar att den geologiska följden i de siluriska och ordoviciska sedimentera bergarterna är starkt störd. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050 Bearbetad data för Mora-profilen. Mer information på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050

Reflection seismic study of the Siljan Ring impact structure: Mora - Stacked data

Two new reflection seismic profiles over the Paleozoic successions of the western part of the Siljan Ring impact structure were acquired during 2011, the Mora and the Orsa profile. This data set concerns the Mora profile. The profile has length of c. 10 km and the processed data image the geological section to about 3 km depth. During the survey, 391 source points (VIBSIST 3000) were recorded by 320 receiver channels for 30 seconds. From this recording, the following data sets were generated and are published here: 1) decoded and quality controlled raw data; 2) pre-processed (shot geometry applied) data; 3) stacked data; 4) migrated data; 5) depth converted data and velocity field. Key acquisition parameters are: Number of channels: 320 (160-160) Near offset: 0m Geophone spacing: 10 m Geophone type: 28 Hz single Source spacing: 20 m Source type: VIBSIST 3000 Hit interval between hammer blows: 100-200 ms Sweeps per source point: 3-4 Nominal fold: 80 Recording instrument: SERCEL 428UL Sample rate: 1 ms Field low cut: Out Field high cut: 400 Hz Record length: 30 s Profile length: 10 km Source points: 391 Dates acquired: 3/6-9/6: 2011 This dataset contains processed data of the Mora profile: Processing steps for this data set: 1: Read decoded VIBSIST data 2: Bulk static shift to zero time 3: Apply geometry 4: Pick first breaks 5: Spherical divergence correction 6: Trace editing 7: Trace balance: 0–3000 ms 8: Spectral equalization: 0–600 ms: 50–80–200–240 Hz; 700–1500 ms: 40–70–180–240 Hz 9: Time variant bandpass filter: 0–400 ms: 50–80–240–360 Hz; 450–600 ms: 45–70–210–300 Hz; 700–1000 ms: 40–60–180–270 Hz; 1100–3000 ms: 35–50–150–225 Hz 10: Refraction statics: datum 160 m, replacement velocity 3000 m/s 11: Residual statics 12: Median filter: 11 traces, 3 samples, 5300 m/s, subtract 13: AGC: 50 ms 14: Mute: top and bottom 15: Residual statics 16: Velocity analysis 17: NMO correction: 70% stretch mute 18: Trace balance 19: FX Decon: 19 trace window 20: No dip filter 21: Trace balance Processed seismic data stored as one file for the enitre seismic profile, according to SEG technical standard SEG-Y revision 1 (SEG-Y_r1.0, 2002); https://seg.org/Publications/SEG-Technical-StandardsÅr 2011 gjordes två nya reflexionsseismiska undersökningar över västra delen av Siljansringen, Mora och Orsa profilerna. Siljansringen är en struktur som uppkom för ca 377 miljoner sedan genom ett meteoritnedslag. Mora profilen (detta dataset) är ca 10 km lång och visar de geologiska strukturerna till ca 3 km djup. Den seismiska bilden visar att den geologiska följden i de siluriska och ordoviciska sedimentera bergarterna är starkt störd. En mer detaljerad beskrivning av datasetet som inkluderar alla viktiga parametrar är tillgängligt på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050 Bearbetade data för Mora-profilen. Mer information på den engelska katalogsidan: https://snd.gu.se/en/catalogue/study/SND1050