Application of different protocols and age-models in OSL dating of earthen mortars

Laura Panzeri; Michela Cantù; Marco Martini; Emanuela Sibilia

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Application of different protocols and age-models in OSL dating of earthen mortars

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| 29. Dez. 2017

Band 44 (2017): Heft 1 (January 2017)

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Online veröffentlicht: 29. Dez. 2017

Seitenbereich: 341 - 351

Eingereicht: 20. Feb. 2017

Akzeptiert: 19. Juni 2017

DOI: https://doi.org/10.1515/geochr-2015-0072

Schlüsselwörter
mortar dating, OSL, quartz, single grain

© 2017 L. Panzeri.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

De obtained with multi-grain technique calculated with different statistical model and normalized to expected De.

a–f. Radial plots and histograms of De distribution for the mortar samples of Palazzo Raimondi (a and b: PR_1C; c and d: PR_1D; e and f: PR_2C).

g–l. Radial plots and histograms of De distribution for the mortar samples of Palazzo Raimondi (g and h: PR_2D; I and j: PR_3C; k and l: PR_3D).

a-f.Radial plots and histograms of De distribution for the mortar samples of Palazzo Soldi (a and b: PS_1C; c and d: PS_2C; e and f: PS_3C).

g-h. Radial plots and histograms of De distribution for the mortar samples of Palazzo Soldi (g and h: PS_3D).

a) De obtained with single-grain technique calculated with different statistical model and normalized to expected De. b) De results of ul-MAM and IEU.

Multi-grain technique: Expected De and De evaluations with different statistical models.

1	2	3	4	5	6	7	8

Sample	Expected D_e (Gy)	# Measured Aliquots	# Accepted liquots	D_e Weighted mean (Gy)	D_e CAM (Gy)	D_e MAM (Gy)	D_e ul-MAM (Gy)
PR_1C	1.13	11	4	25.0 ± 1.1	24.6 ± 1.6	24.3 ± 2.5	7.2 ± 1.5

PR_2C	1.26	31	21	11.3 ± 2.6	23.0 ± 2.8	9.1 ± 2.5	4.0 ± 1.2

PR_3D	0.96	37	24	11.1 ± 1.3	13.9 ± 1.1	9.1 ± 1.2	6.4 ± 0.6

PS_1C	0.53	31	19	7.5 ± 1.7	12.4 ± 1.6	6.5 ± 1.0	2.9 ± 0.7

PS_2C	0.58	30	15	8.2 ± 1.3	12.2 ± 1.2	7.9 ± 1.2	7.1 ± 0.4

PS_3C	0.64	32	23	8.1 ± 1.6	13.7 ± 1.6	6.1 ± 1.0	4.2 ± 0.8

Single-grain technique: expected De and De evaluations with different statistical models.

1	2	3	4	5	6	7	8	9	10	11	12

Sample	Expected D_e (Gy)	# Measured grains	# Bright grains (%)	# Accepted grains (%)	OD D_e Over-dispersion of the archaeological D_e. (%)	OD Drt Over-dispersion of the samples obtained with a dose recovery experiment. See text for details. (%)	D_e Weighted mean (Gy)	D_e CAM (Gy)	D_e MAM (Gy)	D_e ul-MAM (Gy)	D_e IEU (Gy)
PR_1C	1.13	4800	18	1.8	128	19	2.9±0.12	13.4±2.0	2.0±0.4	1.1±0.2	1.08 0.16

PR_1D	1.12	3800	24	1.3	150	20	4.52±0.05	10.7±2.5	1.4±0.4	1.1±0.2	0.93±0.16

PR_2C	1.26	3800	20	1.2	106	29	2.3±0.2	22.9±3.2	3.1±0.8	1.1±0.3	1.2±0.2

PR_2D	1.23	4100	22	2.0	81	20	2.6±0.2	22.0±2.3	6.7±1.2	ND	0.5±0.2

PR_3C	1.09	4200	23	2.6	99	30	2.85±0.12	12.2±1.3	3.5±0.7	1.0±0.3	0.52±0.15

PR_3D	0.96	4000	19	2.2	91	24	3.12±0.09	8.6±0.9	3.9±0.5	ND	ND

PS_1C	0.53	3200	21	3.6	109	20	3.05±0.07	10.6±1.2	2.1±0.3	1.6±0.2	1.6±0.14

PS_2C	0.58	4700	14	0.9	91	30	1.39±0.13	9.9±1.7	2.5±0.7	ND	0.57±0.18

PS_3C	0.64	4200	15	0.7	137	20	1.2±0.2	8.6±2.5	1.5±0.6	0.9±0.2	0.9±0.2

PS_3D	0.62	3900	21	1.7	109	20	3.06±0.17	14.9±2.2	2.8±0.6	1.0±0.2	1.1±0.2

List of the analyzed samples with weight and their yield in 150–250 μm quartz.

Sample	Building	Date	Age (years before 2015)	Structure	Total weight (g)	150-250 μm quartz fraction (g)
PR1C				Basement 1	20.3	4.1
PR1D				Basement 1	15.3	1.8
PR2C	Raimondi	1490–1500 AD	520	Basement 2	23 6	3.6
PR2D				Basement 2	14.1	1.6
PR3C				Basement 3	12.1	1.5
PR3D				Basement 3	26.7	2.0

PS1C				Ground floor	24.3	5.1
PS2C	Pallavicino Soldi	1770–1790 AD	230	First storey	19.4	3.3
PS3C				Ground floor 1	28.2	2.8
PS3D				Ground floor 1	13.8	1.4

Radioactivity concentration in mortars (column 2–4) and bricks (column 5–7), derived annual total dose rates and calculated expected De.

	Mortars			Bricks

1	2	3	4	5	6	7	8	9

Sample	Th (ppm) ±3%	U (ppm) ±3%	⁴⁰K (ppm) ±3%	Th (ppm) ±3%	U (ppm) ±3%	⁴⁰K (ppm) ±3%	Annual dose rate (mGy/a)	Expected De (Gy)
PR_1C	8.90	2.82	1.21	8.99	2.85	0.89	2.18 ± 0.10	1.13

PR_1D	8.18	2.59	1.22	8.99	2.85	0.89	2.15 ± 0.11	1.11

PR_2C	9.70	3.07	1.33	9.96	3.15	1.23	2.43 ± 0.12	1.26

PR_2D	11.46	3.63	1.03	9.96	3.15	1.23	2.37 ± 0.15	1.23

PR_3C	8.53	2.70	1.04	9.79	3.10	0.78	2.10 ± 0.10	1.09

PR_3D	7.05	2.23	0.72	9.96	3.15	0.78	1.85 ± 0.09	0.96

PS_1C	9.81	3.10	0.83	8.99	2.85	0.83	2.27 ± 0.11	0.53

PS_2C	8.25	2.61	1.35	9.15	2.90	1.14	2.47 ± 0.11	0.58

PS_3C	9.46	2.99	1.37	9.96	3.15	1.14	2.74 ± 0.13	0.64

PS_3D	9.12	2.88	1.83	9.31	2.95	0.97	2.62 ± 0.13	0.62

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Application of different protocols and age-models in OSL dating of earthen mortars

Online veröffentlicht: 29. Dez. 2017

Seitenbereich: 341 - 351

Eingereicht: 20. Feb. 2017

Akzeptiert: 19. Juni 2017

DOI: https://doi.org/10.1515/geochr-2015-0072

Schlüsselwörter
mortar dating, OSL, quartz, single grain

© 2017 L. Panzeri.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 2

Fig. 3

Fig. 3

Fig. 4

Multi-grain technique: Expected De and De evaluations with different statistical models.

Single-grain technique: expected De and De evaluations with different statistical models.

List of the analyzed samples with weight and their yield in 150–250 μm quartz.

Radioactivity concentration in mortars (column 2–4) and bricks (column 5–7), derived annual total dose rates and calculated expected De.

Application of different protocols and age-models in OSL dating of earthen mortars

Online veröffentlicht: 29. Dez. 2017

Seitenbereich: 341 - 351

Eingereicht: 20. Feb. 2017

Akzeptiert: 19. Juni 2017

DOI: https://doi.org/10.1515/geochr-2015-0072

Schlüsselwörtermortar dating, OSL, quartz, single grain

© 2017 L. Panzeri.

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Fig. 1

Fig. 2

Fig. 2

Fig. 3

Fig. 3

Fig. 4

Multi-grain technique: Expected De and De evaluations with different statistical models.

Single-grain technique: expected De and De evaluations with different statistical models.

List of the analyzed samples with weight and their yield in 150–250 μm quartz.

Radioactivity concentration in mortars (column 2–4) and bricks (column 5–7), derived annual total dose rates and calculated expected De.

Schlüsselwörter
mortar dating, OSL, quartz, single grain