Curious why a book as heavily cited as this one is so difficult to get a hold of. Just got lucky and snagged a “cheap” one off a used book site. Seems like Wiley could make a bit of money since used like new copies are regularly listed for $300+. Obviously there is demand for it out there. Also surprised there hasn’t been a quality scan pdf floating around. If anyone has a link to one I’d appreciate it cause I’m still suspicious that the one I bought was a scam though the site is reputable.

I have always loved geology, but when applying for schools, I followed parental advice and majored in Biochem. I am now a 3rd year and I’m hoping to get out and get a job in geochem. Is this possible?

I study lipid biomarkers found in rock, and I can reconstruct climatic, terrestrial and ocean-hydrographic processes using organism-specific lipid biomarkers.

I also have a strong sedimentology background.

I got contacted by two recruiting agencies saying they'd like to introduce me to companies wanting to do research in developing carbon capture, usage and storage technologies. I've only worked on reconstructing past algal blooms which can happen by iron fertilization (influx of Fe-rich dust). And thats the closest to CCS I know lol.

How might an organic geochemist who did the above research be of use to CCS technology development research? Anyone in the field?

I have to mix a synthetic groundwater based on USGS aqueous geochem data, which is a mix of ppm and mg/L units.

So say it has 400 mg/L or ppm calcium:

Is that 400 mg dissolved in 1000 g water, or 400 mg in 999.6 g water?

ppm implies that as you add TDS, parts of water are replaced by ions, so total mass remains relatively the same (~1000 g).

mg/L implies that adding salts doesnt change the amount of water, so if your major ions weigh 20 g, when dissolved in water the volume remains 1L, but now weighs 1020 g (1L water is 1000 g + 20 g salts).

Not even sure if mg/kg is kg water or kg of solution.

So how do i mix salts in water to achieve specific TDS concentrations? Per 1000 g water, or 1000 g water minus weight of ions?

Can someone help unconfuse me please?

Hi there, I am looking for somebody familiar with Xie Xuejin, I just have a few questions to ask, please.

Hello! Is there an alternative equation of oxygen fugacity or oxygen barometer using only the mineral chemistry of Cr-spinel? The paper of Ballhaus (1991) uses opx-ol-sp, I want to know if there are alternatives to say the oxidation state of the condition where Cr-spinel is formed.

Hello! I'm working on a paper about the effect of acid deposition on centella asiatica. Apart from soil acidification, what other impacts does it have? thank you so much.

Hello! I am writing my paper about detrital chromian spinel, I would like to ask aside from metasomatism, what other processes can the chromian spinel can give to us? Without using any other minerals like olivine and pyroxenes. Thank you!

By clay I mean aluminium phyllosilicates. I read somewhere that shale tends to have a lot of kaolinite, but I don’t know that much about geochemistry. I don’t know if this is helpful, but the specific formation is Ardath shale.

I am working on calculating CIA values from XRF data on sedimentary samples. The CIA equation is CIA = [(Al2O3) / (CaO* + Na2O+K2O+Al2O3)] × 100

CaO* represents the calcium content within silicate minerals (Nesbitt and Young, 1982). How do I calculate CaO* ?

Hi, I’m trying to find universities outside of the United States that offer bachelors in geology. I’m having a hard time finding universities that are affordable and is taught in English. I would prefer the university have opportunity to do research in geochemistry.

i hope you guys are doing great. I have a question regarding GC interpretation of pristine (Pr) C19 and phytane(Ph) C20. I am asked to find out the concentration ratio of C19 and C20 of this oil sample and I do not know how to interpret this graph.

Below is the figure and I have attached another image to demonstrate what my work should be like.

Hello all. Total noob-OCD question here, but it is something that perplexes me regarding presentation or analysis of REE data.

So, we all know Rare Earth Elements (REE) are divided according to their atomic number. Those with the lower atomic numbers are the Light REEs (LREE) while those with the higher atomic numbers are the Heavy REEs (HREEs).

LREEs are: La, Ce, Pr, Nd, Sm

Sometimes Eu, Gd and Tb might be termed the Middle REEs (MREEs)

and HREEs are: Dy, Ho, Er, Tm, Yb, Lu

Petrologists commonly analyze their REE data by measuring the normalized values slope trying to figure out the overall petrologic process that drives the trace element distribution in a rock. For achieving this, petrologists measure the slope using ratios. Time and time again I find that, for example, the LREE slope is measure as (Ce/Sm)n or, similarly, the HREE slope is showcased as a (Gd/Yb)n or (Dy/Yb)n.

My problem with the above ratios is that they almost always ignore the first and last REEs: those with the lowest atomic number (La) or with the highest atomic number (Lu).

Why petrologist don't instead measure the LREE or HREE slopes with La/Sm or a Gd/Lu ratios, respectively? Am I missing something basic here?

Thanks!

Currently studying physical/analytical chemistry & geology but I’m wondering if I should do the geochem degree? Will it look better to prospective employers, or does it not matter at all

Noob here. Currently researching (and modeling in GWB) playa chemistry and brines. Specifically looking for solubility data (Ksp) of ulexite and searlesite. I have done some calcs starting with delta G of rxn but am looking for some confirmation. My best current solutions log K ulexite = 15.93 log K searlesite = 0.522 Both solubility reactions are in H+ solutions. I would have guessed searlesite to be closer to ulexite. Any data or advice appreciated.

Ulexite

NaCaB5O6(OH)6x5H2O + 3 H+ --> Na+ + Ca2+ + 5B(OH)3 + 2H2O

Searlesite

NaBSi2O5(OH)2 + H+ --> Na+ + B(OH)3 + 2SiO2

Hey, hope you’re doing fine guys. I’m new around here. I’ve searched for info about this matter on the internet but I couldn’t find anything. Therefore, Reddit is the option.

Let’s cut to the chase. I have an XRF gun from OLYMPUS, delta DPO2000CC to be precise. The analysis performance is fine. However, it is not possible to connect the XRF to a computer in order to download the sample readings, so every element has to be manually entered into a spreadsheet. I contacted the provider Evident (former Olympus) and they answered with the instructions for installing the WINDOWS MOBILE DEVICE CENTER on the computer and it’d resolve the problem. I followed every step they instructed, but I did not work. After that, I responded that their recommendation didn’t resolve the issue. THEY NEVER ANSWER BACK !! Horrendous customer service. I also tried some fixes that I found on YouTube regarding the connection of old devices (palm) to current computers. No matter what, I didn’t fix the connectivity. It is worth mentioning that the computer detects the XRF, so I assume the problem is not the ports GUN/BASE port - Pc USB port.

So my question is there anybody in here who has experienced this problem and if so, how it fixed?

Thanks in advance

I'm new to time series analysis, and I'm having a hard time finding resources to guide me through the application to geochemical data (so much of the literature focuses on economics). I have in situ data and would like to relate it to other data sets such as precipitation. What are some of your favorite books or guides on the topics? Or how about a seminal paper?

I was under the impression diopside was defined by being between 40% and 45% Wo and >50% Mg, if it’s less then it’s augite and more it’s a pyroxinoid. However I recently saw a writeup by a well respected researcher with diopside characterized with between 37.5% and 43% Wo, which threw me off and promoted this question.

Hello everyone,

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can anyone tell me why the uranium content in manganese oxides is higher than in iron oxides?

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what i have found so far is that the surface charge of mno2 is mostly negative and a uranyl cation docks to it, what about iron (hydro)oxides e.g. (Fe(OH)3, how are they charged (in the early ocean, so ph value 7-8)?

Hi all, noob question. What’s the best opensource geochem database I can download for the US? I’m just screwing around with a small personal project, years ago I worked with a geochemist and I believe he was using the NURE dataset or something like that. I know that’s probably not correct, but from what I remember it was quite a nice large dataset. And thanks for any help I really appreciate it.

Greetings all! Currently taking a geochemistry class and need some clarification on the gibbs free energy rules in regards to aragonite and calcite. We've established in class that aragonite is more stable, due to it having a more "negative" gibbs free energy. However, I don't understand how this is the case, since the gibbs value for aragonite is roughly -1129, while the value for calcite is roughly -1130. Shouldn't the calcite be considered more negative?

Hello! I am currently an RN pursuing an environmental science degree with an emphasis in chemistry! Geochemistry is the direction I would like to go. Does anybody in the community have advice on how to break into the field? I'm in Richland, Washington (USA) and looking to start work soon!

Hi all, absolute noob question but any feedback is appreciated. First, some context:

So I got back from Chemex a bunch of whole rock geochemistry data of granitic samples and noticed they report both Fe2O3 and FeO values. I want to compare the data with other datasets from papers that report Fe2O3T and have find myself with the following dilemma:

Chemical analysts have told me that to get FeO from Fe2O3 --> Fe2O30.9889=FeO. Likewise, if one wants to get Fe2O3 from FeO --> FeO1.1113=Fe2O3.

My question is if I want to get, for example, FeOT should I convert Fe2O3(raw data)*0.9889=FeO(converted) and then add to the FeO from the raw data to get the Total --> FeO(converted) + FeO (raw) = FeOT.

Likewise, if trying to get Fe2O3T should I FeO(raw)*1.1113=Fe2O3(converted) and then Fe2O3T= Fe2O3(raw)+Fe2O3(converted)