Privileged Planet: unmelted asteroids needed (Introduction)
A study on zinc arrival:
https://www.universetoday.com/168961/life-on-earth-needed-unmelted-asteroids/
"In space exploration, volatiles are defined as the six most common elements in living organisms, plus water. Earth had enough volatiles for life to start here, but it might not have been that way. Researchers from the University of Cambridge and Imperial College London now think they have a reason why Earth received as many volatiles as it did – and thereby allowed it to develop life in the first place.
"One characteristic of volatiles that makes them both difficult to deal with but easy to transport is that they vaporize at relatively low temperatures. Granted, a relatively low temperature could be 950°C for zinc, the volatile the researchers chose to look at.
"They chose zinc because it has a unique composition when captured in meteorites, allowing researchers to identify its source based on that composition. Previously, some of the same researchers had found that the zinc found on Earth had come from different parts of our solar system. About half had originated out past Jupiter, while half came from closer to home.
***
"Radiation was everywhere in the early solar system, and many planetesimals that formed during this period were subjected to it. Notably, the heat from these radiation sources caused the planetesimals’ volatiles to vaporize and be lost to space. So, the researchers at Cambridge and ICL thought they might be able to differentiate the age of the source of some of those volatiles – particularly zinc.
"It turns out that they could. They measured the zinc concentration in many meteorites whose originating planetesimal was known. They then modeled where the Earth received its zinc from. Since zinc is one of the vital volatiles thought to be essential to the development of life, this model could help understand how life might (or might not) develop on other worlds.
"They found that the vast majority (about 90%) of the Earth’s zinc was contributed by planetesimals that weren’t subjected to the high radiation levels of the early solar system. In essence, they were the ones whose volatiles weren’t vaporized, allowing them to contribute more of these valuable, life-giving materials despite only contributing 30% of the Earth’s overall mass.
"Additional work is needed to study whether similar heating effects affected the amount of other volatiles delivered to the early Earth. And even more work is required to model how that volatile delivery model might work for other planets, such as Mars, or even exoplanets further afield.
"But for now, this is another piece of the puzzle that answers an important question about the early solar system. And, maybe more importantly, it shows how many things have to go right for life to develop in the first place." (my bold)
Comment: the bold above is right on point. Life is here following a million (?) or more contingencies. Only design can achieve this.
Complete thread:
- Privileged Planet: Keppler searches for other Earths -
David Turell,
2011-02-05, 18:14
- Privileged Planet: Keppler searches for other Earths -
xeno6696,
2011-02-06, 01:34
- Privileged Planet: New book -
David Turell,
2011-12-31, 19:24
- Privileged Planet: New book -
David Turell,
2015-03-05, 05:23
- Privileged Planet: Magnetic field -
David Turell,
2015-04-15, 18:38
- Privileged Planet: New study -
David Turell,
2015-07-22, 16:36
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 05:40
- Privileged Planet: comparing solar systems -
dhw,
2016-02-02, 18:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 19:24
- Privileged Planet: comparing solar systems -
dhw,
2016-02-03, 13:04
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-03, 15:38
- Privileged Planet: comparing solar systems -
dhw,
2016-02-04, 08:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-04, 15:52
- Privileged Planet: comparing solar systems -
dhw,
2016-02-05, 18:58
- Privileged Planet: very early Earth -
David Turell,
2017-05-08, 18:50
- Privileged Planet: very early Earth -
David Turell,
2018-03-29, 18:07
- Privileged Planet: we have useful phosphorus -
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2018-04-06, 14:56
- Privileged Planet: p;ate tectonics and 'snowball Earth' -
David Turell,
2018-05-08, 01:08
- Privileged Planet: when land masses appeared -
David Turell,
2018-05-25, 21:12
- Privileged Planet: when land masses appeared -
dhw,
2018-05-26, 11:31
- Privileged Planet: when land masses appeared -
David Turell,
2018-05-26, 15:08
- Privileged Planet: where nitrogen is stored -
David Turell,
2018-05-29, 20:53
- Privileged Planet: how the magnetic field protects us - David Turell, 2018-05-31, 22:55
- Privileged Planet: where nitrogen is stored -
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2018-05-29, 20:53
- Privileged Planet: when land masses appeared -
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2018-05-26, 15:08
- Privileged Planet: when land masses appeared -
dhw,
2018-05-26, 11:31
- Privileged Planet: plate tectonics explained -
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2018-06-08, 20:05
- Privileged Planet: plate tectonics explained -
dhw,
2018-06-09, 11:05
- Privileged Planet: our tilt helps life -
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2018-06-21, 14:50
- Privileged Planet: our tilt helps life -
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2018-07-03, 18:29
- Privileged Planet: clouds an interlocked system -
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2018-08-16, 14:35
- Privileged Planet: life transformed the Earth -
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2018-10-31, 18:25
- Privileged Planet: life transformed the Earth -
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2018-11-02, 15:24
- Privileged Planet: life transformed the Earth -
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2018-11-02, 19:37
- Privileged Planet: why does Earth have so much water? -
David Turell,
2018-11-05, 20:00
- Privileged Planet: we have a safe sun -
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2018-11-06, 00:04
- Privileged Planet: the Earth is in a safe place - David Turell, 2020-08-19, 23:26
- Privileged Planet: why does Earth have so much water? -
David Turell,
2018-11-07, 19:43
- Privileged Planet: water and subduction -
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2018-11-19, 22:00
- Privileged Planet: life giving matter from a collision -
David Turell,
2019-01-23, 20:11
- Privileged Planet: life giving matter from a collision !! - David Turell, 2019-01-23, 21:22
- Privileged Planet: life giving matter from a collision -
David Turell,
2019-01-23, 20:11
- Privileged Planet: water and subduction -
David Turell,
2018-11-19, 22:00
- Privileged Planet: we have a safe sun -
David Turell,
2018-11-06, 00:04
- Privileged Planet: why does Earth have so much water? -
David Turell,
2018-11-05, 20:00
- Privileged Planet: life transformed the Earth -
David Turell,
2018-11-02, 19:37
- Privileged Planet: fungus helped transformation of Earth -
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2018-11-07, 17:56
- Privileged Planet: bacteria may cause ore deposits -
David Turell,
2019-01-26, 19:16
- Privileged Planet: magnetic field history -
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2019-01-31, 04:37
- Privileged Planet: magnetic field history II -
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2019-02-21, 21:36
- Privileged Planet: our atmosphere like none other -
David Turell,
2019-02-24, 04:45
- Privileged Planet: when early oxygen appeared -
David Turell,
2019-02-25, 20:12
- Privileged Planet: strong magnetic field required -
David Turell,
2019-03-15, 18:14
- Privileged Planet: tectonic plates required -
David Turell,
2019-04-03, 22:15
- Privileged Planet: iron core produces protective magnetism -
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2019-05-06, 20:53
- Privileged Planet: another comment on internal importance -
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2019-05-06, 22:59
- Privileged Planet: new oxygen and subduction relationship -
David Turell,
2019-05-10, 21:44
- Privileged Planet: availability of nutrients for life -
David Turell,
2019-05-22, 18:19
- Privileged Planet: new study of Earth's core - David Turell, 2019-07-15, 05:23
- Privileged Planet: availability of nutrients for life -
David Turell,
2019-05-22, 18:19
- Privileged Planet: new oxygen and subduction relationship -
David Turell,
2019-05-10, 21:44
- Privileged Planet: another comment on internal importance -
David Turell,
2019-05-06, 22:59
- Privileged Planet: tectonic plates started 2.5 b years a ago -
David Turell,
2019-08-09, 00:33
- Privileged Planet: measuring Earth's early crust -
David Turell,
2019-09-24, 19:21
- Privileged Planet: very early magnetic field - David Turell, 2020-01-25, 15:59
- Privileged Planet: measuring Earth's early crust -
David Turell,
2019-09-24, 19:21
- Privileged Planet: iron core produces protective magnetism -
David Turell,
2019-05-06, 20:53
- Privileged Planet: tectonic plates required -
David Turell,
2019-04-03, 22:15
- Privileged Planet: strong magnetic field required -
David Turell,
2019-03-15, 18:14
- Privileged Planet: when early oxygen appeared -
David Turell,
2019-02-25, 20:12
- Privileged Planet: our atmosphere like none other -
David Turell,
2019-02-24, 04:45
- Privileged Planet: magnetic field reversals -
David Turell,
2021-02-18, 21:09
- Privileged Planet: continental subduction allows life -
David Turell,
2021-02-24, 23:10
- Privileged Planet: continental subduction allows life -
David Turell,
2021-03-02, 20:07
- Privileged Planet: early Earth mostly molten -
David Turell,
2021-03-12, 22:27
- Privileged Planet: deep ocean plate tectonics -
David Turell,
2021-03-18, 19:42
- Privileged Planet: short early days and oxygen levels - David Turell, 2021-08-03, 15:22
- Privileged Planet: deep ocean plate tectonics -
David Turell,
2022-08-19, 16:23
- Privileged Planet: continent formation -
David Turell,
2022-08-20, 18:06
- Privileged Planet: giant impact 3.2 bya - David Turell, 2024-10-23, 17:59
- Privileged Planet: continent formation -
David Turell,
2022-08-20, 18:06
- Privileged Planet: deep ocean plate tectonics -
David Turell,
2021-03-18, 19:42
- Privileged Planet: early Earth mostly molten -
David Turell,
2021-03-12, 22:27
- Privileged Planet: continental subduction allows life -
David Turell,
2021-03-02, 20:07
- Privileged Planet: magnetic loss and return -
David Turell,
2022-09-21, 16:38
- Privileged Planet: meteorite's contribution -
David Turell,
2022-09-30, 20:51
- Privileged Planet: meteorite's contribution of nitrogen -
David Turell,
2023-12-03, 17:47
- Privileged Planet: early magnetic field -
David Turell,
2024-04-25, 23:04
- Privileged Planet: more on early zircons -
David Turell,
2024-05-03, 18:05
- Privileged Planet: more on early zircons - David Turell, 2024-07-12, 19:12
- Privileged Planet: early magnetic field II -
David Turell,
2024-05-10, 17:41
- Privileged Planet: water in nanopores -
David Turell,
2024-07-25, 21:48
- Privileged Planet: unmelted asteroids needed - David Turell, 2024-10-26, 16:34
- Privileged Planet: water in nanopores -
David Turell,
2024-07-25, 21:48
- Privileged Planet: more on early zircons -
David Turell,
2024-05-03, 18:05
- Privileged Planet: early magnetic field -
David Turell,
2024-04-25, 23:04
- Privileged Planet: meteorite's contribution of nitrogen -
David Turell,
2023-12-03, 17:47
- Privileged Planet: meteorite's contribution -
David Turell,
2022-09-30, 20:51
- Privileged Planet: continental subduction allows life -
David Turell,
2021-02-24, 23:10
- Privileged Planet: magnetic field history II -
David Turell,
2019-02-21, 21:36
- Privileged Planet: magnetic field history -
David Turell,
2019-01-31, 04:37
- Privileged Planet: bacteria may cause ore deposits -
David Turell,
2019-01-26, 19:16
- Privileged Planet: life transformed the Earth -
Balance_Maintained,
2018-11-02, 15:24
- Privileged Planet: life transformed the Earth -
David Turell,
2018-10-31, 18:25
- Privileged Planet: our tilt helps life - David Turell, 2019-07-29, 19:43
- Privileged Planet: clouds an interlocked system -
David Turell,
2018-08-16, 14:35
- Privileged Planet: our tilt helps life -
David Turell,
2018-07-03, 18:29
- Privileged Planet: our tilt helps life -
David Turell,
2018-06-21, 14:50
- Privileged Planet: plate tectonics explained -
dhw,
2018-06-09, 11:05
- Privileged Planet: when land masses appeared -
David Turell,
2018-05-25, 21:12
- Privileged Planet: p;ate tectonics and 'snowball Earth' -
David Turell,
2018-05-08, 01:08
- Privileged Planet: we have useful phosphorus -
David Turell,
2018-04-06, 14:56
- Privileged Planet: very early Earth -
David Turell,
2018-03-29, 18:07
- Privileged Planet: very early Earth -
David Turell,
2017-05-08, 18:50
- Privileged Planet: comparing solar systems -
dhw,
2016-02-05, 18:58
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-04, 15:52
- Privileged Planet: comparing solar systems -
dhw,
2016-02-04, 08:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-03, 15:38
- Privileged Planet: comparing solar systems -
dhw,
2016-02-03, 13:04
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 19:24
- Privileged Planet: comparing solar systems -
dhw,
2016-02-02, 18:31
- Privileged Planet: comparing solar systems -
David Turell,
2016-02-02, 05:40
- Privileged Planet: New study -
David Turell,
2015-07-22, 16:36
- Privileged Planet: Magnetic field -
David Turell,
2015-04-15, 18:38
- Privileged Planet: New book -
David Turell,
2015-03-05, 05:23
- Privileged Planet: New book -
David Turell,
2011-12-31, 19:24
- Privileged Planet: Keppler searches for other Earths -
xeno6696,
2011-02-06, 01:34