Table 2 Quartz single-aliquot regenerative-dose (SAR) protocol94 used for dating and sensitivity analysis protocol48 used in this study.

From: Origin of sandy substrates controlling the distribution of open vegetation ecosystems in Amazonia

Step

OSL – SAR protocol94

Sensitivity protocol48

1

Give dose Di

Illumination with Blue LED at 25 °C for 100 s

2

Preheat at 200, 220 or 260 °C for 10 sa

Give dose, 10 Gy

3

Blue LED stimulation for 40 s at 125 °C

Pre-heat at 190 °C for 10 s

4

Give test dose, Dt

IRSL LED stimulation at 60 °C for 300 s

5

Cutheat at 160 or 220 °Ca

Blue LED stimulation for 100 s at 125 °C (BOSL)

6

Blue LED stimulation for 40 s at 125 °C

 

7

Blue LED stimulation for 40 s at 280 °Ca

 

8

Return to step 1

 
  1. D1 < D2 < D3< D4, D5 = 0 Gy, D6 = D1, D7 = D1 (with infrared stimulation before blue stimulation)(natural signal, i = 0 and D0 = natural dose).
  2. aSample dependent, for more information, see Supplementary Material Table S1.
  3. Recuperation was calculated through D5 signal, recycling ratio was calculated through D6 and D1 signals and feldspar contamination was appraised through D6 and D7 signals.
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